在C#Windows窗体应用程序开发的过程中,窗体中有 button按钮控件 、 textbox文本框控件 、 checkbox选择框控件 、 treeview树形视图控件等 ,在这些控件的事件函数中可以编写自己的目标代码以实现特定的功能,但往往有时随着应用开发规模的扩大(控件的增多),我们希望一键式操作,通过一个按钮来触发其他控件的事件进而按照设计好的流程自动执行对应的功能,从而实现整个流程自动化执行的效果。
在 Windows 窗体应用程序中,定时器控件 Timer 与其他的控件略有不同,它并不直接显示在窗体上,而是与其他控件连用,表示每隔一段时间执行一次 Tick 事件。定时器控件中常用的属性是 Interval,用于设置时间间隔,以毫秒为单位。此外,在使用定时器控件时还会用到启动定时器的方法(Start)、停止定时器的方法(Stop)。
在C# Windows窗体应用程序中,Visual Studio左侧的工具箱可以找到Timer控件,它的作用就是按照用户定义的间隔引发事件。使用方法:1、首先用一个整型变量 i 来存储计划所用的时间;2、然后需要在Timer控件的Tick事件中编写让该控件在计时过程中要执行的操作以及满足预期条件后停止计时的代码;3、同时在触发计时器定时开始的代码中设定定时器开始启动和它的间隔时间。
int i;
private void run1()
{
i = 0;
this.timer1.Interval = 1000;//设置time1的间隔时间
this.timer1.Start();//定时器开始计时
}
private void timer1_Tick(object sender, EventArgs e)
{
i++;
if (i >= 5)//if条件里加入判断代码,这里设置5s后停止
{
this.timer1.Stop();//定时器停止计时
}
this.textBox1.Text = "Hello!" + i.ToString();//计时器在停止之前计时过程中要执行的操作,这里让文本框随时间动态显示文本
this.textBox2.Text = "World!" + i.ToString();
}
private void button1_Click(object sender, EventArgs e)//点击button1触发定时器方法run()
{
run1();
}
新建线程调用委托方法本质上也是一个多线程的方法,
线程Thread被定义为程序的执行路径。每个线程都定义了一个独特的控制流。如果您的应用程序涉及到复杂的和耗时的操作,那么设置不同的线程执行路径往往是有益的,每个线程执行特定的工作。线程是轻量级进程。一个使用线程的常见实例是现代操作系统中并行编程的实现。使用线程节省了 CPU 周期的浪费,同时提高了应用程序的效率。线程生命周期开始于 System.Threading.Thread 类的对象被创建时,结束于线程被终止或完成执行时。
在 C# 中,System.Threading.Thread 类用于线程的工作。它允许创建并访问多线程应用程序中的单个线程。进程中第一个被执行的线程称为主线程。当 C# 程序开始执行时,主线程自动创建。使用 Thread 类创建的线程被主线程的子线程调用。下面列出了线程生命周期中的各种状态:
C# 中的委托(Delegate)类似于 C 或 C++ 中函数的指针。委托(Delegate) 是存有对某个方法的引用的一种引用类型变量。引用可在运行时被改变。委托(Delegate)特别用于实现事件和回调方法。所有的委托(Delegate)都派生自 System.Delegate 类。委托声明决定了可由该委托引用的方法。委托可指向一个与其具有相同标签的方法。一旦声明了委托类型,委托对象必须使用 new 关键字来创建,且与一个特定的方法有关。当创建委托时,传递到 new 语句的参数就像方法调用一样书写,但是不带有参数。
using System.Threading;
delegate void set_Text(string s);//定义文本框委托
set_Text Set_Text;//定义一个委托实例对象
private void setTextbox1Text(string s)//通过字符串来改变textbox1值的自定义方法
{
this.textBox1.Text = s;
}
private void setTextbox2Text(string s)//通过字符串来改变textbox2值的自定义方法
{
this.textBox2.Text = s;
}
private void run2_withouteventparameter()//不带事件参数
{
//前5秒动态改变textbox1的值
Set_Text = new set_Text(setTextbox1Text);//实例化
for (i=0;i<5;i++)
{
this.textBox1.Invoke(Set_Text, new object[] { "Hello_"+i.ToString() });//通过调用委托来改变textbox1的值
Thread.Sleep(1000);//线程休眠1s,隔一秒再执行
}
//后5秒动态改变textbox2的值
Set_Text = new set_Text(setTextbox2Text);//实例化
for (i=5;i<10;i++)
{
this.textBox2.Invoke(Set_Text, new object[] { "world_" + i.ToString() });//通过调用委托,来该表label的值
Thread.Sleep(1000);//线程休眠时间,单位是ms
}
}
private void button2_Click(object sender, EventArgs e)
{
Thread thread1 = new Thread(new ThreadStart(run2_withouteventparameter));
thread1.Start();//用线程调用委托方法
}
delegate void setcheckBoxisTrue();//定义选择框委托
setcheckBoxisTrue SetcheckBoxisTrue;
private void setcheckbox1ed()
{
this.checkBox1.Checked = true;
}
private void setnotcheckbox1ed()
{
this.checkBox1.Checked = false;
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
if(checkBox1.Checked)
{
this.textBox1.Text = "textbox1";
}
else
{
this.textBox1.Text = "";
}
}
int num1 = 1, num2 = 2;
private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
{
if (e.Node.Text == "改变button1")
{
this.textBox1.Text = num1.ToString();
num1++;
}
else if (e.Node.Text == "改变button2")
{
this.textBox2.Text = num2.ToString();
num2++;
}
else if (e.Node.Text == "再次改变button1")
{
this.textBox1.Text = (num1*10).ToString();
this.textBox2.Text = ((num1+1) * 10).ToString();
num1++;
}
}
delegate void buttonclick(object sender, EventArgs e);//定义按钮委托
buttonclick ButtonClick;
private void run2_witheventparameter(EventArgs e)//带事件参数
{
ButtonClick = new buttonclick(button1_Click);
this.button1.Invoke(ButtonClick, new object[] { this.button1, e });
Thread.Sleep(10000);
ButtonClick = new buttonclick(button2_Click);
this.button2.Invoke(ButtonClick, new object[] { this.button2, e });
Thread.Sleep(10000);
SetcheckBoxisTrue = new setcheckBoxisTrue(setcheckbox1ed);
this.checkBox1.Invoke(SetcheckBoxisTrue, new object[] { });;
Thread.Sleep(3000);
SetcheckBoxisTrue = new setcheckBoxisTrue(setnotcheckbox1ed);
this.checkBox1.Invoke(SetcheckBoxisTrue, new object[] { });
Set_Text = new set_Text(setTextbox1Text);//实例化
this.textBox1.Invoke(Set_Text, new object[] { "button3 finished" });
Set_Text = new set_Text(setTextbox2Text);//实例化
this.textBox2.Invoke(Set_Text, new object[] { "button3 finished" });
}
private void button3_Click(object sender, EventArgs e)
{
Thread th = new Thread(new ThreadStart(delegate { run2_witheventparameter(e); }));
th.Start();
}
在C#应用程序中,执行Application.DoEvents();
代码可以让程序优先处理当前处于Windows消息队列中的所有消息,直到这些消息处理结束才会执行后面的代码。在不加的时候,因为优先级的问题,程序会执行主进程的代码,再执行别代码,而加了以后就可以同步执行。调用此方法会导致在处理所有等待窗口消息时挂起当前线程。如果消息导致触发事件,则可以执行应用程序代码的其他区域。如果执行需要很长时间的操作或计算,通常最好在新线程上执行这些操作,最好在一个单独的线程中完成它。在单独的线程中运行长任务允许在不干扰UI继续平稳运行的情况下处理它们。在较大数据的循环中效率可能会很低,所以也可以通过别的方法(如多线程异步调用等)来处理。
private void run3(EventArgs e)//最好不要添加线程启动的函数
{
for (int i = 15; i <= 20; i++)
{
this.textBox1.Text = i.ToString();
Application.DoEvents();
Thread.Sleep(1000);
}
TreeNode tn = new TreeNode("改变button1");
TreeViewEventArgs tve = new TreeViewEventArgs(tn);
this.treeView1_AfterSelect(this.treeView1, tve);
Application.DoEvents();
Thread.Sleep(1000);
tn = new TreeNode("改变button2");
tve = new TreeViewEventArgs(tn);
this.treeView1_AfterSelect(this.treeView1, tve);
Application.DoEvents();
Thread.Sleep(1000);
tn = new TreeNode("再次改变button1");
tve = new TreeViewEventArgs(tn);
this.treeView1_AfterSelect(this.treeView1, tve);
Application.DoEvents();
Thread.Sleep(1000);
this.checkBox1.Checked = true;
this.checkBox1_CheckedChanged(this.checkBox1, e);
Application.DoEvents();
Thread.Sleep(1000);
this.checkBox1.Checked = false;
this.checkBox1_CheckedChanged(this.checkBox1, e);
Application.DoEvents();
Thread.Sleep(1000);
}
private void button4_Click(object sender, EventArgs e)//点击button4后5s内每隔1s改变textbox4的值
{
run3(e);
}
打开VS 2015,文件->新建->项目,选择C#下的Windows中的Windows窗体应用程序,项目名称输入AutoExecuteCSharpWindowsFormApplication后点击确定后,会自动新建一个Form1窗体,在Program.cs代码中可以看到主函数作为应用程序的入口,启动了Form1。
下面打开视图中的工具箱,在From1.cs[设计]界面,将左侧工具箱中所需的控件直接拖动到Form1上,这里拖动的控件包括:2个TextBox、1个Timer、1个CheckBox、1个TreeView和4个Button,如下图所示。
对于textbox1和textbox2控件,只需要定义以下委托函数改变其值即可。
delegate void set_Text(string s);//定义文本框委托
set_Text Set_Text;//定义一个委托实例对象
private void setTextbox1Text(string s)//通过字符串来改变textbox1值的自定义方法
{
this.textBox1.Text = s;
}
private void setTextbox2Text(string s)//通过字符串来改变textbox2值的自定义方法
{
this.textBox2.Text = s;
}
private void run2_withouteventparameter()//不带事件参数
{
//前5秒动态改变textbox1的值
Set_Text = new set_Text(setTextbox1Text);//实例化
for (i = 0; i < 5; i++)
{
this.textBox1.Invoke(Set_Text, new object[] { "Hello_" + i.ToString() });//通过调用委托来改变textbox1的值
Thread.Sleep(1000);//线程休眠1s,隔一秒再执行
}
//后5秒动态改变textbox2的值
Set_Text = new set_Text(setTextbox2Text);//实例化
for (i = 5; i < 10; i++)
{
this.textBox2.Invoke(Set_Text, new object[] { "world_" + i.ToString() });//通过调用委托,来该表label的值
Thread.Sleep(1000);//线程休眠时间,单位是ms
}
}
选中timer1控件在右侧的属性窗口的事件图标下找Tick后双击进入timer1_Tick函数,在函数中编写定时器要执行的功能代码
int i;
private void run1()
{
i = 0;
this.timer1.Interval = 1000;//设置time1的间隔时间
this.timer1.Start();//定时器开始计时
}
private void timer1_Tick(object sender, EventArgs e)
{
i++;
if (i >= 5)//if条件里加入判断代码,这里设置5s后停止
{
this.timer1.Stop();//定时器停止计时
}
this.textBox1.Text = "Hello!" + i.ToString();//计时器在停止之前计时过程中要执行的操作,这里让文本框随时间动态显示文本
this.textBox2.Text = "World!" + i.ToString();
}
选中checkBox1控件在右侧的属性窗口的事件图标下找CheckedChanged后双击进入checkBox1_CheckedChanged函数,在函数中编写定时器要执行的功能代码
delegate void setcheckBoxisTrue();//定义选择框委托
setcheckBoxisTrue SetcheckBoxisTrue;
private void setcheckbox1ed()
{
this.checkBox1.Checked = true;
}
private void setnotcheckbox1ed()
{
this.checkBox1.Checked = false;
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
if (checkBox1.Checked)
{
this.textBox1.Text = "textbox1";
}
else
{
this.textBox1.Text = "";
}
}
选中treeView1控件在右侧的属性窗口的事件图标下找AfterSelect后双击进入treeView1_AfterSelect函数,在函数中编写定时器要执行的功能代码
int num1 = 1, num2 = 2;
private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
{
if (e.Node.Text == "改变button1")
{
this.textBox1.Text = num1.ToString();
num1++;
}
else if (e.Node.Text == "改变button2")
{
this.textBox2.Text = num2.ToString();
num2++;
}
else if (e.Node.Text == "再次改变button1")
{
this.textBox1.Text = (num1 * 10).ToString();
this.textBox2.Text = ((num1 + 1) * 10).ToString();
num1++;
}
}
选中button1后在右侧的属性窗口的事件图标下找Click后双击进入button1_Click函数,在函数中编写点击button1要执行的功能代码,button2、button3和button4同理。
delegate void buttonclick(object sender, EventArgs e);//定义按钮委托
buttonclick ButtonClick;
private void run2_witheventparameter(EventArgs e)//带事件参数
{
ButtonClick = new buttonclick(button1_Click);
this.button1.Invoke(ButtonClick, new object[] { this.button1, e });
Thread.Sleep(10000);
ButtonClick = new buttonclick(button2_Click);
this.button2.Invoke(ButtonClick, new object[] { this.button2, e });
Thread.Sleep(10000);
SetcheckBoxisTrue = new setcheckBoxisTrue(setcheckbox1ed);
this.checkBox1.Invoke(SetcheckBoxisTrue, new object[] { });;
Thread.Sleep(3000);
SetcheckBoxisTrue = new setcheckBoxisTrue(setnotcheckbox1ed);
this.checkBox1.Invoke(SetcheckBoxisTrue, new object[] { });
Set_Text = new set_Text(setTextbox1Text);//实例化
this.textBox1.Invoke(Set_Text, new object[] { "button3 finished" });
Set_Text = new set_Text(setTextbox2Text);//实例化
this.textBox2.Invoke(Set_Text, new object[] { "button3 finished" });
}
private void button1_Click(object sender, EventArgs e)
{
run1();
}
private void button2_Click(object sender, EventArgs e)
{
Thread thread1 = new Thread(new ThreadStart(run2_withouteventparameter));
thread1.Start();//用线程调用委托方法
}
private void button3_Click(object sender, EventArgs e)
{
Thread th = new Thread(new ThreadStart(delegate { run2_witheventparameter(e); }));
th.Start();
}
private void run3(EventArgs e)//最好不要添加线程启动的函数
{
for (int i = 15; i <= 20; i++)
{
this.textBox1.Text = i.ToString();
Application.DoEvents();
Thread.Sleep(1000);
}
TreeNode tn = new TreeNode("改变button1");
TreeViewEventArgs tve = new TreeViewEventArgs(tn);
this.treeView1_AfterSelect(this.treeView1, tve);
Application.DoEvents();
Thread.Sleep(1000);
tn = new TreeNode("改变button2");
tve = new TreeViewEventArgs(tn);
this.treeView1_AfterSelect(this.treeView1, tve);
Application.DoEvents();
Thread.Sleep(1000);
tn = new TreeNode("再次改变button1");
tve = new TreeViewEventArgs(tn);
this.treeView1_AfterSelect(this.treeView1, tve);
Application.DoEvents();
Thread.Sleep(1000);
this.checkBox1.Checked = true;
this.checkBox1_CheckedChanged(this.checkBox1, e);
Application.DoEvents();
Thread.Sleep(1000);
this.checkBox1.Checked = false;
this.checkBox1_CheckedChanged(this.checkBox1, e);
Application.DoEvents();
Thread.Sleep(1000);
}
private void button4_Click(object sender, EventArgs e)
{
run3(e);
}
主函数所在类Program.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace AutoExecuteCSharpWindowsFormApplication
{
static class Program
{
///
/// 应用程序的主入口点。
///
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
}
设计器Form1.Designer.cs
namespace AutoExecuteCSharpWindowsFormApplication
{
partial class Form1
{
///
/// 必需的设计器变量。
///
private System.ComponentModel.IContainer components = null;
///
/// 清理所有正在使用的资源。
///
/// 如果应释放托管资源,为 true;否则为 false。
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows 窗体设计器生成的代码
///
/// 设计器支持所需的方法 - 不要修改
/// 使用代码编辑器修改此方法的内容。
///
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
System.Windows.Forms.TreeNode treeNode7 = new System.Windows.Forms.TreeNode("再次改变button1");
System.Windows.Forms.TreeNode treeNode8 = new System.Windows.Forms.TreeNode("改变button1", new System.Windows.Forms.TreeNode[] {
treeNode7});
System.Windows.Forms.TreeNode treeNode9 = new System.Windows.Forms.TreeNode("改变button2");
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.button3 = new System.Windows.Forms.Button();
this.button4 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.textBox2 = new System.Windows.Forms.TextBox();
this.checkBox1 = new System.Windows.Forms.CheckBox();
this.treeView1 = new System.Windows.Forms.TreeView();
this.timer1 = new System.Windows.Forms.Timer(this.components);
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(25, 256);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(75, 23);
this.button1.TabIndex = 0;
this.button1.Text = "button1";
this.button1.UseVisualStyleBackColor = true;
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Location = new System.Drawing.Point(115, 256);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(75, 23);
this.button2.TabIndex = 1;
this.button2.Text = "button2";
this.button2.UseVisualStyleBackColor = true;
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// button3
//
this.button3.Location = new System.Drawing.Point(212, 256);
this.button3.Name = "button3";
this.button3.Size = new System.Drawing.Size(75, 23);
this.button3.TabIndex = 2;
this.button3.Text = "button3";
this.button3.UseVisualStyleBackColor = true;
this.button3.Click += new System.EventHandler(this.button3_Click);
//
// button4
//
this.button4.Location = new System.Drawing.Point(308, 256);
this.button4.Name = "button4";
this.button4.Size = new System.Drawing.Size(75, 23);
this.button4.TabIndex = 3;
this.button4.Text = "button4";
this.button4.UseVisualStyleBackColor = true;
this.button4.Click += new System.EventHandler(this.button4_Click);
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(234, 110);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(110, 21);
this.textBox1.TabIndex = 4;
//
// textBox2
//
this.textBox2.Location = new System.Drawing.Point(234, 161);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(110, 21);
this.textBox2.TabIndex = 5;
//
// checkBox1
//
this.checkBox1.AutoSize = true;
this.checkBox1.Location = new System.Drawing.Point(169, 225);
this.checkBox1.Name = "checkBox1";
this.checkBox1.Size = new System.Drawing.Size(78, 16);
this.checkBox1.TabIndex = 6;
this.checkBox1.Text = "checkBox1";
this.checkBox1.UseVisualStyleBackColor = true;
this.checkBox1.CheckedChanged += new System.EventHandler(this.checkBox1_CheckedChanged);
//
// treeView1
//
this.treeView1.Location = new System.Drawing.Point(41, 110);
this.treeView1.Name = "treeView1";
treeNode7.Name = "节点2";
treeNode7.Text = "再次改变button1";
treeNode8.Name = "节点0";
treeNode8.Text = "改变button1";
treeNode9.Name = "节点1";
treeNode9.Text = "改变button2";
this.treeView1.Nodes.AddRange(new System.Windows.Forms.TreeNode[] {
treeNode8,
treeNode9});
this.treeView1.Size = new System.Drawing.Size(149, 67);
this.treeView1.TabIndex = 7;
this.treeView1.AfterSelect += new System.Windows.Forms.TreeViewEventHandler(this.treeView1_AfterSelect);
//
// timer1
//
this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(413, 330);
this.Controls.Add(this.treeView1);
this.Controls.Add(this.checkBox1);
this.Controls.Add(this.textBox2);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.button4);
this.Controls.Add(this.button3);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Button button3;
private System.Windows.Forms.Button button4;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.CheckBox checkBox1;
private System.Windows.Forms.TreeView treeView1;
private System.Windows.Forms.Timer timer1;
}
}
功能性代码Form1.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Threading;
namespace AutoExecuteCSharpWindowsFormApplication
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
delegate void buttonclick(object sender, EventArgs e);//定义按钮委托
buttonclick ButtonClick;
private void run2_witheventparameter(EventArgs e)//带事件参数
{
ButtonClick = new buttonclick(button1_Click);
this.button1.Invoke(ButtonClick, new object[] { this.button1, e });
Thread.Sleep(10000);
ButtonClick = new buttonclick(button2_Click);
this.button2.Invoke(ButtonClick, new object[] { this.button2, e });
Thread.Sleep(10000);
SetcheckBoxisTrue = new setcheckBoxisTrue(setcheckbox1ed);
this.checkBox1.Invoke(SetcheckBoxisTrue, new object[] { });;
Thread.Sleep(3000);
SetcheckBoxisTrue = new setcheckBoxisTrue(setnotcheckbox1ed);
this.checkBox1.Invoke(SetcheckBoxisTrue, new object[] { });
Set_Text = new set_Text(setTextbox1Text);//实例化
this.textBox1.Invoke(Set_Text, new object[] { "button3 finished" });
Set_Text = new set_Text(setTextbox2Text);//实例化
this.textBox2.Invoke(Set_Text, new object[] { "button3 finished" });
}
private void run3(EventArgs e)//最好不要添加线程启动的函数
{
for (int i = 15; i <= 20; i++)
{
this.textBox1.Text = i.ToString();
Application.DoEvents();
Thread.Sleep(1000);
}
TreeNode tn = new TreeNode("改变button1");
TreeViewEventArgs tve = new TreeViewEventArgs(tn);
this.treeView1_AfterSelect(this.treeView1, tve);
Application.DoEvents();
Thread.Sleep(1000);
tn = new TreeNode("改变button2");
tve = new TreeViewEventArgs(tn);
this.treeView1_AfterSelect(this.treeView1, tve);
Application.DoEvents();
Thread.Sleep(1000);
tn = new TreeNode("再次改变button1");
tve = new TreeViewEventArgs(tn);
this.treeView1_AfterSelect(this.treeView1, tve);
Application.DoEvents();
Thread.Sleep(1000);
this.checkBox1.Checked = true;
this.checkBox1_CheckedChanged(this.checkBox1, e);
Application.DoEvents();
Thread.Sleep(1000);
this.checkBox1.Checked = false;
this.checkBox1_CheckedChanged(this.checkBox1, e);
Application.DoEvents();
Thread.Sleep(1000);
}
private void button1_Click(object sender, EventArgs e)
{
run1();
}
delegate void set_Text(string s);//定义文本框委托
set_Text Set_Text;//定义一个委托实例对象
private void setTextbox1Text(string s)//通过字符串来改变textbox1值的自定义方法
{
this.textBox1.Text = s;
}
private void setTextbox2Text(string s)//通过字符串来改变textbox2值的自定义方法
{
this.textBox2.Text = s;
}
private void run2_withouteventparameter()//不带事件参数
{
//前5秒动态改变textbox1的值
Set_Text = new set_Text(setTextbox1Text);//实例化
for (i = 0; i < 5; i++)
{
this.textBox1.Invoke(Set_Text, new object[] { "Hello_" + i.ToString() });//通过调用委托来改变textbox1的值
Thread.Sleep(1000);//线程休眠1s,隔一秒再执行
}
//后5秒动态改变textbox2的值
Set_Text = new set_Text(setTextbox2Text);//实例化
for (i = 5; i < 10; i++)
{
this.textBox2.Invoke(Set_Text, new object[] { "world_" + i.ToString() });//通过调用委托,来该表label的值
Thread.Sleep(1000);//线程休眠时间,单位是ms
}
}
private void button2_Click(object sender, EventArgs e)
{
Thread thread1 = new Thread(new ThreadStart(run2_withouteventparameter));
thread1.Start();//用线程调用委托方法
}
private void button3_Click(object sender, EventArgs e)
{
Thread th = new Thread(new ThreadStart(delegate { run2_witheventparameter(e); }));
th.Start();
}
private void button4_Click(object sender, EventArgs e)
{
run3(e);
}
int i;
private void run1()
{
i = 0;
this.timer1.Interval = 1000;//设置time1的间隔时间
this.timer1.Start();//定时器开始计时
}
private void timer1_Tick(object sender, EventArgs e)
{
i++;
if (i >= 5)//if条件里加入判断代码,这里设置5s后停止
{
this.timer1.Stop();//定时器停止计时
}
this.textBox1.Text = "Hello!" + i.ToString();//计时器在停止之前计时过程中要执行的操作,这里让文本框随时间动态显示文本
this.textBox2.Text = "World!" + i.ToString();
}
int num1 = 1, num2 = 2;
private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
{
if (e.Node.Text == "改变button1")
{
this.textBox1.Text = num1.ToString();
num1++;
}
else if (e.Node.Text == "改变button2")
{
this.textBox2.Text = num2.ToString();
num2++;
}
else if (e.Node.Text == "再次改变button1")
{
this.textBox1.Text = (num1 * 10).ToString();
this.textBox2.Text = ((num1 + 1) * 10).ToString();
num1++;
}
}
delegate void setcheckBoxisTrue();//定义选择框委托
setcheckBoxisTrue SetcheckBoxisTrue;
private void setcheckbox1ed()
{
this.checkBox1.Checked = true;
}
private void setnotcheckbox1ed()
{
this.checkBox1.Checked = false;
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
if (checkBox1.Checked)
{
this.textBox1.Text = "textbox1";
}
else
{
this.textBox1.Text = "";
}
}
}
}