WPF开发学生信息管理系统【WPF+Prism+MAH+WebApi】(完)

最近通过WPF开发项目,为了对WPF知识点进行总结,所以利用业余时间,开发一个学生信息管理系统【Student Information Management System】。前四篇文章进行了框架搭建和模块划分,后台WebApi接口编写,以及课程管理模块,班级管理模块,学生管理模块的开发,本文在前四篇基础之上,继续深入开发学生信息管理系统的成绩管理和系统管理模块,通过本篇文章,将继续巩固之前的知识点,本文仅供学习分享使用,如有不足之处,还请指正。

涉及知识点

学生信息管理系统SIMS属于一个小型的完整系统开发,涉及的知识点比较,具体如下所示:

  1. WPF开发中TextBlock,TextBox,DataGrid,Combox,TabControl等控件的基础使用以及数据绑定等操作。
  2. MAH样式的使用,在本示例中MAH主要用于统一页面风格,提高用户体验。
  3. HttpClient使用,主要用于访问服务端提供的接口。

业务逻辑

前面几篇文章,由浅入深,逐步介绍了课程管理模块,班级管理模块,学生管理模块,今天继续介绍成绩管理模块,业务逻辑关系如下:

  1. 学生属于某一班级之学生,所以学生中包含班级信息。
  2. 班级中存在班长,同时班长又属于学生的一个实体。
  3. 成绩是某一学生的成绩,且一名学生有各门课程的成绩。所以成绩和学生有关,且和课程有关。

实体E-R图

学生表,成绩表,班级表,课程表,各个数据表之间的E-R图,如下所示:

由此可见,成绩表与课程和学生表,都有关联,所以放在最后。

成绩管理

成绩管理主要用于录入各个学生各个课程的成绩,包含成绩表的增删改查功能。

1. 成绩管理后台服务Service

IScoreAppService接口是对成绩管理的抽象,如下所示:

 1 namespace SIMS.WebApi.Services.Score
 2 {
 3     public interface IScoreAppService
 4     {
 5         public PagedRequest<ScoreEntity> GetScores(string studentName,string courseName,int pageNum,int pageSize);
 6 
 7         /// <summary>
 8         /// 通过id查询成绩信息
 9         /// </summary>
10         /// <param name="id"></param>
11         /// <returns></returns>
12         public ScoreEntity GetScore(int id);
13 
14         /// <summary>
15         /// 新增成绩
16         /// </summary>
17         /// <param name="score"></param>
18         /// <returns></returns>
19         public int AddScore(ScoreEntity score);
20 
21         /// <summary>
22         /// 修改成绩
23         /// </summary>
24         /// <param name="score"></param>
25         /// <returns></returns>
26         public int UpdateScore(ScoreEntity score);
27 
28         /// <summary>
29         /// 删除成绩
30         /// </summary>
31         /// <param name="id"></param>
32         public int DeleteScore(int id);
33     }
34 }

服务实现类ScoreAppService,是对接口的实现,具体如下所示:

 1 namespace SIMS.WebApi.Services.Score
 2 {
 3     public class ScoreAppService : IScoreAppService
 4     {
 5         private DataContext dataContext;
 6 
 7         public ScoreAppService(DataContext dataContext)
 8         {
 9             this.dataContext = dataContext;
10         }
11 
12         public int AddScore(ScoreEntity score)
13         {
14             var entity = this.dataContext.Scores.Add(score);
15             this.dataContext.SaveChanges();
16             return 0;
17         }
18 
19         public int DeleteScore(int id)
20         {
21             var entity = dataContext.Scores.FirstOrDefault(x => x.Id == id);
22             if (entity != null)
23             {
24                 dataContext.Scores.Remove(entity);
25                 dataContext.SaveChanges();
26             }
27             return 0;
28         }
29 
30         public ScoreEntity GetScore(int id)
31         {
32             var entity = dataContext.Scores.FirstOrDefault(r => r.Id == id);
33             return entity;
34         }
35 
36         /// <summary>
37         /// 按条件查询成绩列表
38         /// </summary>
39         /// <param name="studentName"></param>
40         /// <param name="courseName"></param>
41         /// <param name="pageNum"></param>
42         /// <param name="pageSize"></param>
43         /// <returns></returns>
44         public PagedRequest<ScoreEntity> GetScores(string studentName, string courseName, int pageNum, int pageSize)
45         {
46             IQueryable<ScoreEntity> scores = null;
47             if (!string.IsNullOrEmpty(studentName) && !string.IsNullOrEmpty(courseName))
48             {
49                 var students = this.dataContext.Students.Where(r => r.Name.Contains(studentName));
50                 var courses = this.dataContext.Courses.Where(r => r.Name.Contains(courseName));
51                 scores = this.dataContext.Scores.Where(r => students.Select(t => t.Id).Contains(r.StudentId)).Where(r => courses.Select(t => t.Id).Contains(r.CourseId));
52             }
53             else if (!string.IsNullOrEmpty(studentName))
54             {
55                 var students = this.dataContext.Students.Where(r => r.Name.Contains(studentName));
56                 scores = this.dataContext.Scores.Where(r => students.Select(t => t.Id).Contains(r.StudentId));
57             }
58             else if (!string.IsNullOrEmpty(courseName))
59             {
60                 var courses = this.dataContext.Courses.Where(r => r.Name.Contains(courseName));
61                 scores = this.dataContext.Scores.Where(r => courses.Select(t => t.Id).Contains(r.CourseId));
62             }
63             else {
64                 scores = dataContext.Scores.Where(r => true).OrderBy(r => r.Id);
65             }
66             int count = scores.Count();
67             List<ScoreEntity> items;
68             if (pageSize > 0)
69             {
70                 items = scores.Skip((pageNum - 1) * pageSize).Take(pageSize).ToList();
71             }
72             else
73             {
74                 items = scores.ToList();
75             }
76             return new PagedRequest<ScoreEntity>()
77             {
78                 count = count,
79                 items = items
80             };
81         }
82 
83         public int UpdateScore(ScoreEntity score)
84         {
85             dataContext.Scores.Update(score);
86             dataContext.SaveChanges();
87             return 0;
88         }
89     }
90 }

2. 成绩管理WebApi接口控制器

控制器是对数据服务的公开,每一个控制器的方法表示一个Action,即表示一个客户端可以访问的入口。具体如下所示:

 1 namespace SIMS.WebApi.Controllers
 2 {
 3     /// <summary>
 4     /// 成绩控制器
 5     /// </summary>
 6     [Route("api/[controller]/[action]")]
 7     [ApiController]
 8     public class ScoreController : ControllerBase
 9     {
10         private readonly ILogger<ScoreController> logger;
11 
12         private readonly IScoreAppService scoreAppService;
13 
14         public ScoreController(ILogger<ScoreController> logger, IScoreAppService scoreAppService)
15         {
16             this.logger = logger;
17             this.scoreAppService = scoreAppService;
18         }
19 
20         /// <summary>
21         /// 获取成绩信息
22         /// </summary>
23         /// <param name="id"></param>
24         /// <returns></returns>
25         [HttpGet]
26         public PagedRequest<ScoreEntity> GetScores(string? studentName, string? courseName, int pageNum, int pageSize)
27         {
28             return scoreAppService.GetScores(studentName, courseName, pageNum, pageSize);
29         }
30 
31         /// <summary>
32         /// 获取成绩信息
33         /// </summary>
34         /// <param name="id"></param>
35         /// <returns></returns>
36         [HttpGet]
37         public ScoreEntity GetScore(int id)
38         {
39             return scoreAppService.GetScore(id);
40         }
41 
42         /// <summary>
43         /// 新增成绩
44         /// </summary>
45         /// <param name="score"></param>
46         /// <returns></returns>
47         [HttpPost]
48         public int AddScore(ScoreEntity score)
49         {
50             return scoreAppService.AddScore(score);
51         }
52 
53         /// <summary>
54         /// 修改成绩
55         /// </summary>
56         /// <param name="score"></param>
57         /// <returns></returns>
58         [HttpPut]
59         public int UpdateScore(ScoreEntity score)
60         {
61             return scoreAppService.UpdateScore(score);
62         }
63 
64         /// <summary>
65         /// 删除成绩
66         /// </summary>
67         /// <param name="id"></param>
68         [HttpDelete]
69         public int DeleteScore(int id)
70         {
71             return scoreAppService.DeleteScore(id);
72         }
73     }
74 }

当服务运行起来后,Swagger还每一个控制器都进行归类,可以清晰的看到每一个接口对应的网址,成绩管理模块对应的接口如下所示:

 

 

3. 成绩管理客户端接口访问类HttpUtil

在学生信息系统开发的过程中,发现所有的接口访问都是通用的,所以对接口访问功能提取成一个HttpUtil基类【包括GET,POST,PUT,DELETE等功能】,其他具体业务再继承基类,并细化具体业务即可。ScoreHttpUtil代码如下所示:

 1 namespace SIMS.Utils.Http
 2 {
 3     public class ScoreHttpUtil:HttpUtil
 4     {
 5         /// <summary>
 6         /// 通过id查询成绩信息
 7         /// </summary>
 8         /// <param name="id"></param>
 9         /// <returns></returns>
10         public static ScoreEntity GetScore(int id)
11         {
12             Dictionary<string, object> data = new Dictionary<string, object>();
13             data["id"] = id;
14             var str = Get(UrlConfig.SCORE_GETSCORE, data);
15             var socre = StrToObject<ScoreEntity>(str);
16             return socre;
17         }
18 
19         /// <summary>
20         /// 
21         /// </summary>
22         /// <param name="studentName"></param>
23         /// <param name="courseName"></param>
24         /// <param name="pageNum"></param>
25         /// <param name="pageSize"></param>
26         /// <returns></returns>
27         public static PagedRequest<ScoreEntity> GetScores(string? studentName, string? courseName, int pageNum, int pageSize)
28         {
29             Dictionary<string, object> data = new Dictionary<string, object>();
30             data["courseName"] = courseName;
31             data["studentName"] = studentName;
32             data["pageNum"] = pageNum;
33             data["pageSize"] = pageSize;
34             var str = Get(UrlConfig.SCORE_GETSCORES, data);
35             var socres = StrToObject<PagedRequest<ScoreEntity>>(str);
36             return socres;
37         }
38 
39         public static bool AddScore(ScoreEntity socre)
40         {
41             var ret = Post<ScoreEntity>(UrlConfig.SCORE_ADDSCORE, socre);
42             return int.Parse(ret) == 0;
43         }
44 
45         public static bool UpdateScore(ScoreEntity socre)
46         {
47             var ret = Put<ScoreEntity>(UrlConfig.SCORE_UPDATESCORE, socre);
48             return int.Parse(ret) == 0;
49         }
50 
51         public static bool DeleteScore(int Id)
52         {
53             Dictionary<string, string> data = new Dictionary<string, string>();
54             data["Id"] = Id.ToString();
55             var ret = Delete(UrlConfig.SCORE_DELETESCORE, data);
56             return int.Parse(ret) == 0;
57         }
58     }
59 }

4. 成绩管理客户端操作

经过前面四个部分的开发,客户端就可以与数据接口进行交互,展示数据到客户端。客户端所有的开发,均采用MVVM模式进行。

在成绩管理模块中,根据功能区分,主要包含两个View视图及对应的ViewModel。如下所示:

  1. Score视图,主要用于成绩的查询,以及新增,修改,删除的链接入口。
  2. AddEditScore视图,主要用于成绩信息的新增和修改,共用一个视图页面。
  3. 成绩课程不需要页面,所以没有对应视图。

4.1. Score视图

Score视图,主要是成绩的查询和新增,修改,删除的链接入口。涉及知识点如下:

  1. Score视图页面布局采用Grid方式和StackPanel混合布局,即整体布局采用Grid,细微布局采用StackPanel。
  2. 成绩采用分页列表的方式展示,需要用到DataGrid,及分页控件【WPF默认不提供分页控件,可自行编写分页控件】。
  3. 查询条件采用按钮Button和文本框TextBox等组成,关于基础控件的使用,不再详细论述,可参考其他文章。
  4. 在本系统的所有WPF视图中,均需要引入Prism和 MAH组件。
  5. Score视图中,所有的数据均采用Binding的方式与ViewModel进行交互。

Score视图具体代码,如下所示:

  1 <UserControl x:Class="SIMS.ScoreModule.Views.Score"
  2              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  3              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  4              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
  5              xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
  6              xmlns:i="http://schemas.microsoft.com/xaml/behaviors"
  7              xmlns:prism="http://prismlibrary.com/"
  8              xmlns:local="clr-namespace:SIMS.ScoreModule.Views"
  9              mc:Ignorable="d" 
 10              xmlns:mahApps="http://metro.mahapps.com/winfx/xaml/controls"
 11              xmlns:ctrls ="clr-namespace:SIMS.Utils.Controls;assembly=SIMS.Utils"
 12              prism:ViewModelLocator.AutoWireViewModel="True"
 13              d:DesignHeight="450" d:DesignWidth="800">
 14 
 15     <UserControl.Resources>
 16         <ResourceDictionary>
 17             <ResourceDictionary.MergedDictionaries>
 18                 <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
 19                 <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Themes/Light.Blue.xaml" />
 20                 <ResourceDictionary>
 21                     <Style x:Key="LinkButton" TargetType="Button">
 22                         <Setter Property="Background" Value="White"></Setter>
 23                         <Setter Property="Cursor" Value="Hand"></Setter>
 24                         <Setter Property="Margin" Value="3"></Setter>
 25                         <Setter Property="MinWidth" Value="80"></Setter>
 26                         <Setter Property="MinHeight" Value="25"></Setter>
 27                         <Setter Property="BorderThickness" Value="0 0 0 0"></Setter>
 28                     </Style>
 29                 </ResourceDictionary>
 30             </ResourceDictionary.MergedDictionaries>
 31         </ResourceDictionary>
 32     </UserControl.Resources>
 33     <i:Interaction.Triggers>
 34         <i:EventTrigger EventName="Loaded">
 35             <i:InvokeCommandAction Command="{Binding LoadedCommand}"></i:InvokeCommandAction>
 36         </i:EventTrigger>
 37     </i:Interaction.Triggers>
 38     <Grid>
 39         <Grid.RowDefinitions>
 40             <RowDefinition Height="Auto"></RowDefinition>
 41             <RowDefinition Height="Auto"></RowDefinition>
 42             <RowDefinition Height="*"></RowDefinition>
 43             <RowDefinition Height="Auto"></RowDefinition>
 44         </Grid.RowDefinitions>
 45         <TextBlock Text="成绩信息" FontSize="20" Background="AliceBlue" Margin="2"></TextBlock>
 46         <StackPanel Grid.Row="1" Orientation="Horizontal" VerticalAlignment="Center">
 47             <TextBlock Text="学生名称" VerticalAlignment="Center" Margin="2"></TextBlock>
 48             <TextBox Margin="4" MinWidth="120" Height="30"
 49                      Text="{Binding StudentName}"
 50                              HorizontalContentAlignment="Stretch"
 51                              mahApps:TextBoxHelper.ClearTextButton="True"
 52                              mahApps:TextBoxHelper.Watermark="学生名称"
 53                              mahApps:TextBoxHelper.WatermarkAlignment="Left"
 54                              SpellCheck.IsEnabled="True" />
 55             <TextBlock Text="课程名称" VerticalAlignment="Center" Margin="2"></TextBlock>
 56             <TextBox Margin="4" MinWidth="120" Height="30"
 57                      Text="{Binding CourseName}"
 58                              HorizontalContentAlignment="Stretch"
 59                              mahApps:TextBoxHelper.ClearTextButton="True"
 60                              mahApps:TextBoxHelper.Watermark="课程名称"
 61                              mahApps:TextBoxHelper.WatermarkAlignment="Left"
 62                              SpellCheck.IsEnabled="True" />
 63             <Button Content="查询" Style="{DynamicResource MahApps.Styles.Button.Square.Accent}" Width="120" Height="30" Margin="3" Command="{Binding QueryCommand}"></Button>
 64             <Button Content="新增" Style="{DynamicResource MahApps.Styles.Button.Square.Accent}" Width="120" Height="30" Margin="3" Command="{Binding AddCommand}"></Button>
 65         </StackPanel>
 66         <DataGrid x:Name="dgScores"
 67                   Grid.Row="2"
 68                   Grid.Column="0"
 69                   Margin="2"
 70                   AutoGenerateColumns="False"
 71                   CanUserAddRows="False"
 72                   CanUserDeleteRows="False"
 73                   ItemsSource="{Binding Scores}"
 74                   RowHeaderWidth="0">
 75             <DataGrid.Columns>
 76                 <DataGridTextColumn Binding="{Binding Student.Name}" Header="学生" Width="*" />
 77                 <DataGridTextColumn Binding="{Binding Course.Name}" Header="课程" Width="*"/>
 78                 <DataGridTextColumn Binding="{Binding Score}" Header="成绩" Width="*"/>
 79                 <DataGridTextColumn Binding="{Binding CreateTime, StringFormat=yyyy-MM-dd HH:mm:ss}" Header="创建时间" Width="*"/>
 80                 <DataGridTextColumn Binding="{Binding LastEditTime,StringFormat=yyyy-MM-dd HH:mm:ss}" Header="最后修改时间" Width="*"/>
 81                 <DataGridTemplateColumn Header="操作" Width="*">
 82                     <DataGridTemplateColumn.CellTemplate>
 83                         <DataTemplate>
 84                             <StackPanel Orientation="Horizontal">
 85                                 <Button  Content="Edit" Style="{StaticResource LinkButton}" Command="{Binding RelativeSource={RelativeSource  AncestorType=DataGrid,  Mode=FindAncestor}, Path=DataContext.EditCommand}" CommandParameter="{Binding Id}">
 86                                     <Button.Template>
 87                                         <ControlTemplate TargetType="Button">
 88                                             <TextBlock TextDecorations="Underline" HorizontalAlignment="Center">
 89                                                 <ContentPresenter />
 90                                             </TextBlock>
 91                                         </ControlTemplate>
 92                                     </Button.Template>
 93                                 </Button>
 94                                 <Button Content="Delete" Style="{StaticResource LinkButton}" Command="{Binding RelativeSource={RelativeSource  AncestorType=DataGrid,  Mode=FindAncestor}, Path=DataContext.DeleteCommand}" CommandParameter="{Binding Id}">
 95                                     <Button.Template>
 96                                         <ControlTemplate TargetType="Button">
 97                                             <TextBlock TextDecorations="Underline" HorizontalAlignment="Center">
 98                                                 <ContentPresenter />
 99                                             </TextBlock>
100                                         </ControlTemplate>
101                                     </Button.Template>
102                                 </Button>
103                             </StackPanel>
104                         </DataTemplate>
105                     </DataGridTemplateColumn.CellTemplate>
106                 </DataGridTemplateColumn>
107             </DataGrid.Columns>
108         </DataGrid>
109         <ctrls:PageControl Grid.Row="3" DataContext="{Binding}" ></ctrls:PageControl>
110     </Grid>
111 </UserControl>

4.2. ScoreViewModel

ScoreViewModel是页面视图的业务逻辑处理,如处理客户端的点击的命令等内容。具体代码如下所示:

  1 namespace SIMS.ScoreModule.ViewModels
  2 {
  3     public class ScoreViewModel : BindableBase
  4     {
  5 
  6         #region 属性或构造方法
  7 
  8         /// <summary>
  9         /// 课程名称
 10         /// </summary>
 11         private string courseName;
 12 
 13         public string CourseName
 14         {
 15             get { return courseName; }
 16             set { SetProperty(ref courseName, value); }
 17         }
 18 
 19         /// <summary>
 20         /// 学生姓名
 21         /// </summary>
 22         private string studentName;
 23 
 24         public string StudentName
 25         {
 26             get { return studentName; }
 27             set { SetProperty(ref studentName, value); }
 28         }
 29 
 30         private ObservableCollection<ScoreInfo> scores;
 31 
 32         public ObservableCollection<ScoreInfo> Scores
 33         {
 34             get { return scores; }
 35             set { SetProperty(ref scores, value); }
 36         }
 37 
 38         private IDialogService dialogService;
 39 
 40         public ScoreViewModel(IDialogService dialogService)
 41         {
 42             this.dialogService = dialogService;
 43             this.pageNum = 1;
 44             this.pageSize = 20;
 45         }
 46 
 47         private void InitInfo()
 48         {
 49             Scores = new ObservableCollection<ScoreInfo>();
 50             var pagedRequst = ScoreHttpUtil.GetScores(this.StudentName, this.CourseName, this.pageNum, this.pageSize);
 51             var entities = pagedRequst.items;
 52             Scores.AddRange(entities.Select(r=>new ScoreInfo(r)));
 53             //
 54             this.TotalCount = pagedRequst.count;
 55             this.TotalPage = ((int)Math.Ceiling(this.TotalCount * 1.0 / this.pageSize));
 56         }
 57 
 58         #endregion
 59 
 60         #region 事件
 61 
 62         private DelegateCommand loadedCommand;
 63 
 64         public DelegateCommand LoadedCommand
 65         {
 66             get
 67             {
 68                 if (loadedCommand == null)
 69                 {
 70                     loadedCommand = new DelegateCommand(Loaded);
 71                 }
 72                 return loadedCommand;
 73             }
 74         }
 75 
 76         private void Loaded()
 77         {
 78             InitInfo();
 79         }
 80 
 81         private DelegateCommand queryCommand;
 82 
 83         public DelegateCommand QueryCommand
 84         {
 85             get
 86             {
 87                 if (queryCommand == null)
 88                 {
 89                     queryCommand = new DelegateCommand(Query);
 90                 }
 91                 return queryCommand;
 92             }
 93         }
 94 
 95         private void Query()
 96         {
 97             this.pageNum = 1;
 98             this.InitInfo();
 99         }
100 
101         /// <summary>
102         /// 新增命令
103         /// </summary>
104         private DelegateCommand addCommand;
105 
106         public DelegateCommand AddCommand
107         {
108             get
109             {
110                 if (addCommand == null)
111                 {
112                     addCommand = new DelegateCommand(Add);
113                 }
114                 return addCommand;
115             }
116         }
117 
118         private void Add()
119         {
120             this.dialogService.ShowDialog("addEditScore", null, AddEditCallBack, "MetroDialogWindow");
121         }
122 
123         private void AddEditCallBack(IDialogResult dialogResult)
124         {
125             if (dialogResult != null && dialogResult.Result == ButtonResult.OK)
126             {
127                 //刷新列表
128                 this.pageNum = 1;
129                 this.InitInfo();
130             }
131         }
132 
133         /// <summary>
134         /// 编辑命令
135         /// </summary>
136         private DelegateCommand<object> editCommand;
137 
138         public DelegateCommand<object> EditCommand
139         {
140             get
141             {
142                 if (editCommand == null)
143                 {
144                     editCommand = new DelegateCommand<object>(Edit);
145                 }
146                 return editCommand;
147             }
148         }
149 
150         private void Edit(object obj)
151         {
152             if (obj == null)
153             {
154                 return;
155             }
156             var Id = int.Parse(obj.ToString());
157             var score = this.Scores.FirstOrDefault(r => r.Id == Id);
158             if (score == null)
159             {
160                 MessageBox.Show("无效的成绩ID");
161                 return;
162             }
163             IDialogParameters dialogParameters = new DialogParameters();
164             dialogParameters.Add("score", score);
165             this.dialogService.ShowDialog("addEditScore", dialogParameters, AddEditCallBack, "MetroDialogWindow");
166         }
167 
168         /// <summary>
169         /// 编辑命令
170         /// </summary>
171         private DelegateCommand<object> deleteCommand;
172 
173         public DelegateCommand<object> DeleteCommand
174         {
175             get
176             {
177                 if (deleteCommand == null)
178                 {
179                     deleteCommand = new DelegateCommand<object>(Delete);
180                 }
181                 return deleteCommand;
182             }
183         }
184 
185         private void Delete(object obj)
186         {
187             if (obj == null)
188             {
189                 return;
190             }
191             var Id = int.Parse(obj.ToString());
192             var score = this.Scores.FirstOrDefault(r => r.Id == Id);
193             if (score == null)
194             {
195                 MessageBox.Show("无效的成绩ID");
196                 return;
197             }
198             if (MessageBoxResult.Yes != MessageBox.Show("Are you sure to delete?", "Confirm", MessageBoxButton.YesNo))
199             {
200                 return;
201             }
202             bool flag = ScoreHttpUtil.DeleteScore(Id);
203             if (flag)
204             {
205                 this.pageNum = 1;
206                 this.InitInfo();
207             }
208         }
209 
210         #endregion
211     }
212 }

注意:关于分页功能,与其他模块代码通用,所以此处略去。

4. 3. 新增编辑成绩视图AddEditScore

新增编辑成绩视图,主要用于对成绩的修改和新增,可通过查询页面的新增按钮和具体成绩的编辑按钮弹出对应窗口。如下所示:

 1 <UserControl x:Class="SIMS.ScoreModule.Views.AddEditScore"
 2              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
 3              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 4              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
 5              xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
 6              xmlns:local="clr-namespace:SIMS.ScoreModule.Views"
 7              xmlns:i="http://schemas.microsoft.com/xaml/behaviors"
 8              xmlns:mahApps ="http://metro.mahapps.com/winfx/xaml/controls"
 9              xmlns:prism="http://prismlibrary.com/"      
10              mc:Ignorable="d" 
11              d:DesignHeight="450" d:DesignWidth="800">
12     <prism:Dialog.WindowStyle>
13         <Style TargetType="Window">
14             <Setter Property="Width" Value="600"></Setter>
15             <Setter Property="Height" Value="400"></Setter>
16         </Style>
17     </prism:Dialog.WindowStyle>
18     <UserControl.Resources>
19         <ResourceDictionary>
20             <ResourceDictionary.MergedDictionaries>
21                 <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" />
22                 <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Themes/Light.Blue.xaml" />
23             </ResourceDictionary.MergedDictionaries>
24         </ResourceDictionary>
25     </UserControl.Resources>
26     <i:Interaction.Triggers>
27         <i:EventTrigger EventName="Loaded">
28             <i:InvokeCommandAction Command="{Binding LoadedCommand}"></i:InvokeCommandAction>
29         </i:EventTrigger>
30     </i:Interaction.Triggers>
31     <Grid>
32         <Grid.ColumnDefinitions>
33             <ColumnDefinition Width="0.2*"></ColumnDefinition>
34             <ColumnDefinition Width="Auto"></ColumnDefinition>
35             <ColumnDefinition Width="*"></ColumnDefinition>
36             <ColumnDefinition Width="0.2*"></ColumnDefinition>
37         </Grid.ColumnDefinitions>
38         <Grid.RowDefinitions>
39             <RowDefinition></RowDefinition>
40             <RowDefinition></RowDefinition>
41             <RowDefinition></RowDefinition>
42             <RowDefinition></RowDefinition>
43         </Grid.RowDefinitions>
44         <TextBlock Text="学生" Grid.Row="0" Grid.Column="1" VerticalAlignment="Center" Margin="3"></TextBlock>
45         <ComboBox Grid.Row="0" Grid.Column="2" MinWidth="120" Height="35" ItemsSource="{Binding Students}" mahApps:TextBoxHelper.ClearTextButton="True" SelectedItem="{Binding Student}">
46             <ComboBox.ItemTemplate>
47                 <DataTemplate>
48                     <TextBlock Text="{Binding Name}"></TextBlock>
49                 </DataTemplate>
50             </ComboBox.ItemTemplate>
51         </ComboBox>
52         <TextBlock Text="课程" Grid.Row="1" Grid.Column="1"  VerticalAlignment="Center" Margin="3"></TextBlock>
53         <ComboBox Grid.Row="1" Grid.Column="2" MinWidth="120" Height="35" ItemsSource="{Binding Courses}" mahApps:TextBoxHelper.ClearTextButton="True" SelectedItem="{Binding Course}">
54             <ComboBox.ItemTemplate>
55                 <DataTemplate>
56                     <TextBlock Text="{Binding Name}"></TextBlock>
57                 </DataTemplate>
58             </ComboBox.ItemTemplate>
59         </ComboBox>
60         <TextBlock Text="成绩" Grid.Row="2" Grid.Column="1"   VerticalAlignment="Center" Margin="3"></TextBlock>
61         <TextBox Grid.Row="2" Grid.Column="2" MinWidth="120" Height="35"   VerticalAlignment="Center" Margin="3" Text="{Binding Score.Score}"></TextBox>
62         <StackPanel Grid.Row="3" Grid.Column="1" Grid.ColumnSpan="2" Orientation="Horizontal" HorizontalAlignment="Center" Margin="3">
63             <Button Content="取消" Margin="5" MinWidth="120" Height="35" Style="{DynamicResource MahApps.Styles.Button.Square.Accent}" Command="{Binding CancelCommand}"></Button>
64             <Button Content="保存" Margin="5" MinWidth="120" Height="35" Style="{DynamicResource MahApps.Styles.Button.Square.Accent}" Command="{Binding SaveCommand}"></Button>
65         </StackPanel>
66     </Grid>
67 </UserControl>

4. 新增编辑成绩ViewModel

AddEditScoreViewModel是对页面具体功能的业务封装,主要是对应成绩信息的保存,也包括数据绑定和命令绑定等内容,与其他模块不同之处,在于此模块关联学生和课程信息,需要绑定下拉框数据源。具体如下所示:

  1 namespace SIMS.ScoreModule.ViewModels
  2 {
  3     public class AddEditScoreViewModel : BindableBase, IDialogAware
  4     {
  5 
  6         #region 属性和构造函数
  7 
  8         /// <summary>
  9         /// 当前实体
 10         /// </summary>
 11         private ScoreEntity score;
 12 
 13         public ScoreEntity Score
 14         {
 15             get { return score; }
 16             set { SetProperty(ref score , value); }
 17         }
 18 
 19 
 20         /// <summary>
 21         /// 下拉框选择的学生
 22         /// </summary>
 23         private StudentEntity student;
 24 
 25         public StudentEntity Student
 26         {
 27             get { return student; }
 28             set { SetProperty(ref student , value); }
 29         }
 30 
 31         /// <summary>
 32         /// 学生列表
 33         /// </summary>
 34         private List<StudentEntity> students;
 35 
 36         public List<StudentEntity> Students
 37         {
 38             get { return students; }
 39             set { SetProperty(ref students, value); }
 40         }
 41 
 42         private CourseEntity course;
 43 
 44         public CourseEntity Course
 45         {
 46             get { return course; }
 47             set {SetProperty(ref course , value); }
 48         }
 49 
 50 
 51         /// <summary>
 52         /// 课程列表
 53         /// </summary>
 54         private List<CourseEntity> courses;
 55 
 56         public List<CourseEntity> Courses
 57         {
 58             get { return courses; }
 59             set { SetProperty(ref courses, value); }
 60         }
 61 
 62         public AddEditScoreViewModel() { 
 63         
 64         }
 65 
 66 
 67         #endregion
 68 
 69         #region Command
 70 
 71         private DelegateCommand loadedCommand;
 72 
 73         public DelegateCommand LoadedCommand
 74         {
 75             get
 76             {
 77                 if (loadedCommand == null)
 78                 {
 79                     loadedCommand = new DelegateCommand(Loaded);
 80                 }
 81                 return loadedCommand;
 82             }
 83         }
 84 
 85         private void Loaded()
 86         {
 87             LoadStudents();
 88             LoadCourses();
 89 
 90             //如果有班长,则为班长赋值
 91             if (Score.StudentId > 0)
 92             {
 93                 this.Student = this.Students?.FirstOrDefault(r => r.Id == Score.StudentId);
 94             }
 95             if (Score.CourseId > 0) { 
 96                 this.Course = this.Courses?.FirstOrDefault(r=>r.Id == Score.CourseId);
 97             }
 98         }
 99 
100 
101         private DelegateCommand cancelCommand;
102 
103         public DelegateCommand CancelCommand
104         {
105             get
106             {
107                 if (cancelCommand == null)
108                 {
109                     cancelCommand = new DelegateCommand(Cancel);
110                 }
111                 return cancelCommand;
112             }
113         }
114 
115         private void Cancel()
116         {
117             RequestClose?.Invoke((new DialogResult(ButtonResult.Cancel)));
118         }
119 
120         private DelegateCommand saveCommand;
121 
122         public DelegateCommand SaveCommand
123         {
124             get
125             {
126                 if (saveCommand == null)
127                 {
128                     saveCommand = new DelegateCommand(Save);
129                 }
130                 return saveCommand;
131             }
132         }
133 
134         private void Save()
135         {
136             if (Score != null)
137             {
138                 Score.CreateTime = DateTime.Now;
139                 Score.LastEditTime = DateTime.Now;
140                 if (Student != null)
141                 {
142                     Score.StudentId = Student.Id;
143                 }
144                 if (Course != null) { 
145                     Score.CourseId = Course.Id;
146                 }
147                 bool flag = false;
148                 if (Score.Id > 0)
149                 {
150                     flag = ScoreHttpUtil.UpdateScore(Score);
151                 }
152                 else
153                 {
154                     flag = ScoreHttpUtil.AddScore(Score);
155                 }
156                 if (flag)
157                 {
158                     RequestClose?.Invoke((new DialogResult(ButtonResult.OK)));
159                 }
160             }
161         }
162 
163 
164         #endregion
165 
166         #region 函数
167 
168         /// <summary>
169         /// 加载学生列表
170         /// </summary>
171         private void LoadStudents() {
172             this.Students = new List<StudentEntity>();
173             var pagedRequst = StudentHttpUtil.GetStudents(null, null, 1, -1);
174             var entities = pagedRequst.items;
175             Students.AddRange(entities);
176         }
177 
178         /// <summary>
179         /// 加载课程列表
180         /// </summary>
181         private void LoadCourses() {
182             this.Courses = new List<CourseEntity>();
183             var pagedRequst = CourseHttpUtil.GetCourses(null, null, 1, -1);
184             var entities = pagedRequst.items;
185             Courses.AddRange(entities);
186         }
187 
188         #endregion
189     }
190 }

注意:弹出窗口实现方法与其他模块通用,所以此处略去。

5. 成绩管理示例效果图

经过上述步骤后,成绩管理模块就开发完成,运行VS后,效果如下所示:

系统管理模块

1. 系统管理模块核心代码

系统管理模块,主要包含四个部分,用户管理,角色管理,菜单管理,个人信息。因篇幅有限,暂时仅列出主要内容:

从数据库读取用户所属的权限,代码如下所示:

 1 public List<UserRight> GetUserRights(int? userId)
 2 {
 3     if (userId != null)
 4     {
 5         var query = from u in dataContext.UserRoles
 6                     join r in dataContext.Roles on u.RoleId equals r.Id
 7                     join x in dataContext.RoleMenus on r.Id equals x.RoleId
 8                     join m in dataContext.Menus on x.MenuId equals m.Id
 9                     where u.UserId == userId
10                     select new UserRight { Id = m.Id, RoleName = r.Name, MenuName = m.Name, Url = m.Url,Icon=m.Icon, ParentId = m.ParentId, SortId = m.SortId };
11 
12         return query.ToList();
13     }
14     return null;
15 }

在客户端获取后,转换成导航菜单对象即可,如下所示:

 1 public NavigationViewModel(IEventAggregator eventAggregator)
 2 {
 3     this.eventAggregator = eventAggregator;
 4     navItems = new List<HamburgerMenuItemBase>();
 5     var userRights = RoleHttpUtil.GetUserRights(UserInfo.Instance.Id);
 6     var parents = userRights.Where(x => x.ParentId == null).OrderBy(r=>r.SortId);
 7     foreach (var parent in parents) {
 8         navItems.Add(new HamburgerMenuHeaderItem() { Label = parent.MenuName });
 9         var subItems = userRights.Where(r=>r.ParentId==parent.Id).OrderBy(r=>r.SortId);
10         foreach (var subItem in subItems) {
11             navItems.Add(new HamburgerMenuGlyphItem() { Label = subItem.MenuName, Tag = subItem.Url, Glyph = subItem.Icon });
12         }
13     }
14     UserInfo.Instance.Roles = String.Join(',', userRights.Select(r=>r.RoleName).Distinct().ToList());
15 }

2. 系统管理模块示例截图

关于系统管理模块示例截图如下所示:

个人信息,显示个人基础信息,如下所示:

 

 用户管理,比其他列表多了一个授权按钮,主要用于为用户分配角色如下所示:

角色管理模块,比其他列表多了一个分配按钮,主要用于为分配角色对应的菜单如下所示:

菜单管理,菜单管理模块,主要用于管理菜单信息,与其他模块不同的是,需要配置图标,如下所示:

总结

通过本篇文章的成绩管理模块,系统管理模块,以及前两篇文章中的课程管理模块,班级管理模块,学生管理模块,不难发现,每一个模块的开发都是由列表DataGrid,文本框TextBox,下拉框Combox,单选按钮RadioButton,按钮Button等组成的,虽功能略有差异,但总归万变不离其宗。开发方法也大同小异,复杂的功能都是普通的功能累加起来的。这也是本系列文章由浅入深的渐进安排。希望能够抛砖引玉,不局限于某一功能,而是能够举一反三,自我理解,以达到自我开发的能力。

至此,整个学生信息管理系统系列已完毕。

 

关于源码

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posted @ 2022-06-05 19:17  老码识途呀  阅读(1966)  评论(5编辑  收藏  举报