.net C#一些好用的小tips

1. 打开文件夹并选中指定的文件：

　　Process.Start("Explorer.exe", "/select," + dev.PhotoDataFilePath);

2. 提示框显示在界面最前面：

　　MessageBox.Show((string)this.FindResource("PUB_STR_DOWNLOAD_FAILED"), "", MessageBoxButton.OK, MessageBoxImage.None, MessageBoxResult.None, MessageBoxOptions.ServiceNotification);

3. 后台代码排序前台列表：

　　SNRInfo_DataGrid.SetBinding(DataGrid.ItemsSourceProperty, new Binding("SNRWindowDevice.DeviceProtocol.snrCollection") { Source = this, Mode = BindingMode.OneWay, UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged });

        SortDescription sd = new SortDescription("snrName", ListSortDirection.Ascending);

        SNRInfo_DataGrid.Items.SortDescriptions.Add(sd);

4. DataGrid点击表头排序：

　　<DataGridTemplateColumn CanUserSort="True" SortMemberPath="BreakTimePerMin" Width="*" Header="占时比/min" >

5. 写log文件，末尾追加：

/// <summary>
/// 写Log文件
/// </summary>
/// <param name="logs"></param>
private void WriteLogFile(string logs)
{
      try
      {
            if (string.IsNullOrEmpty(logPath) || logPath == string.Empty)
                 logPath = AppDomain.CurrentDomain.BaseDirectory + "App_Data" + "\\" + DateTime.Now.ToString("yyyyMMdd") + ".log";
             if (!File.Exists(logPath))
                  File.Create(logPath).Close();       // 创建记录log的文件，以年月日命名

              using (StreamWriter file = new StreamWriter(logPath, true))
              {
                  if (!string.IsNullOrEmpty(logs))
                  {
                      file.WriteLine(logs);// 直接追加文件末尾，换行 
                  }
              }
        }
        catch (Exception ex)
        {
            LogHelper.ErrorLog("MainWindow.WriteLogFile", ex);
         }
}

 6. 解析多层级的json串

{{
  "id": "6",
  "type": "1",
  "no": "ZTPER19110756972",
  "name": "吴神",
  "concat": "涛哥",
  "phone": "13811111111",
  "plane_sn": "ZTU3VSA1910WCAFX",
  "fc_sn": "4MFCC11910024G",
  "permit_stime": "2019-11-07",
  "permit_etime": "2019-11-13",
  "remark": "datgrid",
  "check_time": "",
  "check_status": "1",
  "check_remark": "",
  "permit_sstime": "",
  "permit_setime": "",
  "created": "2019-11-07 07:49:56",
  "expire_status": 2,
  "item": {
    "type": 0,
    "radius": 0,
    "height": 0,
    "latlon": []
  }
}}

string data = dataContents["data"].ToString();
                    JObject contents = (JObject)JsonConvert.DeserializeObject(data);
                    CurrentNo = contents["no"].ToString();
                    CurrentQueryTime = selectedData.created;
                    CurrentOrganization = contents["name"].ToString();
                    CurrentTel = contents["phone"].ToString();
                    CurrentRelieveTime = contents["permit_stime"].ToString() + "到" + contents["permit_etime"].ToString();
                    CurrentQueryState = contents["remark"].ToString();
                    if (contents["type"].ToString() == "1")
                        CurrentFlyType = "圆形";
                    else
                        CurrentFlyType = "多边形";
                    CurrentFlyNo = contents["plane_sn"].ToString();
                    CurrentFCNo = contents["fc_sn"].ToString();
                    CurrentResult = contents["check_status"].ToString();
                    CurrentRefuseReason = contents["check_remark"].ToString();
                    CurrentCheckTime = contents["check_time"].ToString();
                    CurrentStatus = contents["expire_status"].ToString();
                    CurrentConfirmTime = contents["permit_sstime"].ToString() + " 至 " + contents["permit_setime"].ToString();

                    string itemData = contents["item"].ToString();
                    JObject itemContents = (JObject)JsonConvert.DeserializeObject(itemData);
                    CurrentHeightLimit = itemContents["height"].ToString();
                    string latLngData = itemContents["latlon"].ToString();
                    JArray jArray = JArray.Parse(latLngData);
                    int index = 0;
                    CurrentLatLng = string.Empty;
                    foreach (var item in jArray)
                    {
                        if (index / 2 == 1)
                            CurrentLatLng += "\r\n" + "  " + "j" + index + "：" + item["lat"].ToString() + ", " + item["lon"].ToString();
                        else
                            CurrentLatLng += "  " + "j" + index + "：" + item["lat"].ToString() + ", " + item["lon"].ToString();
                        index++;
                    }

 7. wpf嵌入WebBrowser

　　a. 前端添加两个引用：

　　 xmlns:winform="clr-namespace:System.Windows.Forms;assembly=System.Windows.Forms"
        xmlns:wfi="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration"

　　b. 后台添加两个引用：

　　 using System.Windows.Forms;
　　 using System.Windows.Forms.Integration;

　　c. 创建WebBrowser，并绑定到前端

WindowsFormsHost host = new WindowsFormsHost();

            System.Windows.Forms.WebBrowser web = new System.Windows.Forms.WebBrowser()
            {
                ScriptErrorsSuppressed = true,
                Url = new Uri("http://www.baidu.com")
            };
            host.Child = web;

            this.m_grid.Children.Add(host);

 8. wpf实现动画（呼吸灯效果）

<TextBlock Text="等待中……" FontSize="50" Foreground="Green" HorizontalAlignment="Center" FontWeight="Black" x:Name="TextBlockRecording">
            <TextBlock.Triggers>
                <EventTrigger RoutedEvent="FrameworkElement.Loaded">
                    <BeginStoryboard>
                        <Storyboard BeginTime="0:0:0" AutoReverse="True" RepeatBehavior="Forever">
                            <ColorAnimation From="Green" To="Transparent" RepeatBehavior="Forever" Storyboard.TargetProperty="(TextBlock.Foreground).(SolidColorBrush.Color)" Storyboard.TargetName="TextBlockRecording"></ColorAnimation>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </TextBlock.Triggers>
        </TextBlock>

 9. WPF中TextBox绑定后台属性不让输入小数点怎么办？看下面：

　　<TextBox Grid.Row="1" Text="{Binding Path=Device.UpPrecision,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" MinWidth="60" FontSize="15"/>

　　上面这种方式在.Net4.5.2版本没法输入小数点（当然可以通过自定义样式可以输入），原因就在于UpdateSourceTrigger=PropertyChanged。这个时候可以把UpdateSourceTrigger=PropertyChanged改成UpdateSourceTrigger=Default，这样就可以输入小数点了。