针对教材2.3.4部分讲到的通用对话框控件和MessageBox的使用进行演示
public void DisplayValue()
{
//获取ShowDialog()返回值
DialogResult userResponse = openFileDialog1.ShowDialog();
if(userResponse == DialogResult.OK)//如果用户选定文件
{
//获取文件完整路径
string filePath = openFileDialog1.FileName.ToString();
MessageBox.Show("You successfully opened: '"+
filePath+"'",//MessageBox主体信息
"Success",//MessageBox标题
MessageBoxButtons.OK,//MessageBox显示的按钮
MessageBoxIcon.Information,//MessageBox显示的图标
MessageBoxDefaultButton.Button3);//设置MessageBox默认按钮
}
else//如果用户没有选定文件
{
MessageBox.Show("You canceled "+
"the open file operation.",
"Warning",
MessageBoxButtons.OK,
MessageBoxIcon.Warning,
MessageBoxDefaultButton.Button1,
MessageBoxOptions.RightAlign);//指定将对消息框使用哪些显示和关联选项
}
}
完整源代码下载：use_Dialog.rar
public void DisplayValue() { //获取ShowDialog()返回值 DialogResult userResponse = openFileDialog1.ShowDialog(); if(userResponse == DialogResult.OK)//如果用户选定文件 { //获取文件完整路径 string filePath = openFileDialog1.FileName.ToString(); MessageBox.Show("You successfully opened: '"+ filePath+"'",//MessageBox主体信息 "Success",//MessageBox标题 MessageBoxButtons.OK,//MessageBox显示的按钮 MessageBoxIcon.Information,//MessageBox显示的图标 MessageBoxDefaultButton.Button3);//设置MessageBox默认按钮 } else//如果用户没有选定文件 { MessageBox.Show("You canceled "+ "the open file operation.", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button1, MessageBoxOptions.RightAlign);//指定将对消息框使用哪些显示和关联选项 } }posted @ 2007-03-01 19:51 dn 阅读(111) 评论(0) 编辑
对应教材2.2.2中的（12）部分，主要对ListBox控件进行演示
using System;
using System.Collections;
using System.Drawing;
using System.Windows.Forms;
public class EnvironmentVars:Form
{
Label label;
public static void Main()
{
Application.Run(new EnvironmentVars());
}
public EnvironmentVars()
{
//设置窗体属性，这些属性属于基类Form
Text = "Environment Variables";
//动态创建Label控件
label = new Label();
label.Parent = this;
label.Anchor = AnchorStyles.Left | AnchorStyles.Right;
label.Location = new Point(Font.Height,Font.Height);
label.Size = new Size(ClientSize.Width - 2 * Font.Height,Font.Height);
//动态创建ListBox控件
ListBox listbox = new ListBox();
listbox.Parent = this;
listbox.Location = new Point(Font.Height,3 * Font.Height);
listbox.Size = new Size(12 * Font.Height,8 * Font.Height);
listbox.Sorted = true;
listbox.SelectedIndexChanged += new EventHandler(ListBoxOnSelectedIndexChanged);
//获取环境变量
IDictionary dict = Environment.GetEnvironmentVariables();
string[] astr = new string[dict.Keys.Count];
//将环境变量的键值（Key）显示到ListBox中
dict.Keys.CopyTo(astr,0);
listbox.Items.AddRange(astr);
listbox.SelectedIndex = 0;
}
void ListBoxOnSelectedIndexChanged(object obj,EventArgs ea)
{
//获取用户点击的ListBox条目及数据
ListBox listbox = (ListBox)obj;
string strItem = (string)listbox.SelectedItem;
//将对应键值的环境变量值显示到Label上
label.Text = Environment.GetEnvironmentVariable(strItem);
}
}
完整源代码下载：EnvironmentVars.rar
using System;using System.Collections;using System.Drawing;using System.Windows.Forms;public class EnvironmentVars:Form{ Label label; public static void Main() { Application.Run(new EnvironmentVars()); } public EnvironmentVars() { //设置窗体属性，这些属性属于基类Form Text = "Environment Variables"; //动态创建Label控件 label = new Label(); label.Parent = this; label.Anchor = AnchorStyles.Left | AnchorStyles.Right; label.Location = new Point(Font.Height,Font.Height); label.Size = new Size(ClientSize.Width - 2 * Font.Height,Font.Height); //动态创建ListBox控件 ListBox listbox = new ListBox(); listbox.Parent = this; listbox.Location = new Point(Font.Height,3 * Font.Height); listbox.Size = new Size(12 * Font.Height,8 * Font.Height); listbox.Sorted = true; listbox.SelectedIndexChanged += new EventHandler(ListBoxOnSelectedIndexChanged); //获取环境变量 IDictionary dict = Environment.GetEnvironmentVariables(); string[] astr = new string[dict.Keys.Count]; //将环境变量的键值（Key）显示到ListBox中 dict.Keys.CopyTo(astr,0); listbox.Items.AddRange(astr); listbox.SelectedIndex = 0; } void ListBoxOnSelectedIndexChanged(object obj,EventArgs ea) { //获取用户点击的ListBox条目及数据 ListBox listbox = (ListBox)obj; string strItem = (string)listbox.SelectedItem; //将对应键值的环境变量值显示到Label上 label.Text = Environment.GetEnvironmentVariable(strItem); }}posted @ 2007-03-01 19:47 dn 阅读(65) 评论(0) 编辑
对应教材2.2.2的（4）部分
using System;
using System.Drawing;
using System.Windows.Forms;
public class DateAndTimeStatus:Form
{
StatusBarPanel sbpMenu,sbpDate,sbpTime;
public static void Main()
{
Application.Run(new DateAndTimeStatus());
}
public DateAndTimeStatus()
{
//设置窗体属性，这些属性属于基类Form
Text = "Date and Time Status";
BackColor = SystemColors.Window;
ForeColor = SystemColors.WindowText;
//动态创建StstusBar控件
StatusBar sb = new StatusBar();
sb.Parent = this;
sb.ShowPanels = true;
//动态创建StatusBarPanel控件
sbpMenu = new StatusBarPanel();
sbpMenu.Text = "Reserved for menu help";
sbpMenu.BorderStyle = StatusBarPanelBorderStyle.None;
sbpMenu.AutoSize = StatusBarPanelAutoSize.Spring;
sbpDate = new StatusBarPanel();
sbpDate.AutoSize = StatusBarPanelAutoSize.Contents;
sbpDate.ToolTipText = "The Current date";
sbpTime = new StatusBarPanel();
sbpTime.AutoSize = StatusBarPanelAutoSize.Contents;
sbpTime.ToolTipText = "The Current time";
//将StatusBarPanel控件实例添加到StstusBar控件的Panels集合
sb.Panels.AddRange(new StatusBarPanel[]{sbpMenu,sbpDate,sbpTime});
//创建计时器控件并加载事件处理函数
Timer timer = new Timer();
timer.Tick += new EventHandler(TimerOnTick);
timer.Interval = 1000;
timer.Start();
}
//计时器控件事件处理函数
void TimerOnTick(object obj,EventArgs ea)
{
//获取当前时间，日期
DateTime dt = DateTime.Now;
//在StatusBarPanel上设置当前日期，时间
sbpDate.Text = dt.ToShortDateString();
sbpTime.Text = dt.ToShortTimeString();
}
}
完整源代码下载：DateAndTimeStatus.rar
using System;using System.Drawing;using System.Windows.Forms;public class DateAndTimeStatus:Form{ StatusBarPanel sbpMenu,sbpDate,sbpTime; public static void Main() { Application.Run(new DateAndTimeStatus()); } public DateAndTimeStatus() { //设置窗体属性，这些属性属于基类Form Text = "Date and Time Status"; BackColor = SystemColors.Window; ForeColor = SystemColors.WindowText; //动态创建StstusBar控件 StatusBar sb = new StatusBar(); sb.Parent = this; sb.ShowPanels = true; //动态创建StatusBarPanel控件 sbpMenu = new StatusBarPanel(); sbpMenu.Text = "Reserved for menu help"; sbpMenu.BorderStyle = StatusBarPanelBorderStyle.None; sbpMenu.AutoSize = StatusBarPanelAutoSize.Spring; sbpDate = new StatusBarPanel(); sbpDate.AutoSize = StatusBarPanelAutoSize.Contents; sbpDate.ToolTipText = "The Current date"; sbpTime = new StatusBarPanel(); sbpTime.AutoSize = StatusBarPanelAutoSize.Contents; sbpTime.ToolTipText = "The Current time"; //将StatusBarPanel控件实例添加到StstusBar控件的Panels集合 sb.Panels.AddRange(new StatusBarPanel[]{sbpMenu,sbpDate,sbpTime}); //创建计时器控件并加载事件处理函数 Timer timer = new Timer(); timer.Tick += new EventHandler(TimerOnTick); timer.Interval = 1000; timer.Start(); } //计时器控件事件处理函数 void TimerOnTick(object obj,EventArgs ea) { //获取当前时间，日期 DateTime dt = DateTime.Now; //在StatusBarPanel上设置当前日期，时间 sbpDate.Text = dt.ToShortDateString(); sbpTime.Text = dt.ToShortTimeString(); }}posted @ 2007-03-01 19:44 dn 阅读(62) 评论(0) 编辑
对应教材2.2.2中的（2）部分
using System;using System.Drawing;using System.Windows.Forms;public class TwoStatusBarPanels:Form{ public static void Main() { Application.Run(new TwoStatusBarPanels()); } public TwoStatusBarPanels() { //设置窗体属性，这些属性属于基类Form Text = "Two Status Bar Panels"; BackColor = SystemColors.Window; ForeColor = SystemColors.WindowText; //动态创建StstusBar控件 StatusBar sb = new StatusBar(); sb.Parent = this; sb.ShowPanels = true; //动态创建StatusBarPanel控件 StatusBarPanel sbPanel1 = new StatusBarPanel(); sbPanel1.Text = "Panel 1"; StatusBarPanel sbPanel2 = new StatusBarPanel(); sbPanel2.Text = "Panel 2"; //将StatusBarPanel控件实例添加到StstusBar控件的Panels集合 sb.Panels.Add(sbPanel1); sb.Panels.Add(sbPanel2); }}posted @ 2007-03-01 19:41 dn 阅读(52) 评论(0) 编辑