作Java设计的有很多人不知道C#中的delegate,在设计C#程序时,不能很好的运用delegate解决设计上的问题,下面是一个关于Form2能够被复用的示演,希望对了解C#的delegate有用。
namespace WindowsApplication8
{
/// <summary>
/// Form2 的摘要说明。
/// </summary>
public class Form2 : System.Windows.Forms.Form
{
public SendTextDelegate SendText;
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private System.Windows.Forms.Button button1;
private System.Windows.Forms.TextBox textBox1;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
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public Form2()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
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//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
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/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
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#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(112, 144);
this.button1.Name = "button1";
this.button1.TabIndex = 0;
this.button1.Text = "button1";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(104, 40);
this.textBox1.Name = "textBox1";
this.textBox1.TabIndex = 1;
this.textBox1.Text = "textBox1";
//
// Form2
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.button1);
this.Name = "Form2";
this.Text = "Form2";
this.ResumeLayout(false);
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}
#endregion
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private void button1_Click(object sender, System.EventArgs e)
{
this.SendText(this.textBox1.Text);
}
}
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public delegate void SendTextDelegate(string text);
}
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下面是Form1的代码,它把Form2的传过来的text直接显示中它的label1上了。
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private void button1_Click(object sender, System.EventArgs e)
{
Form2 form2 = new Form2();
form2.SendText = new SendTextDelegate(this.formSendText);
form2.Show();
}
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public void formSendText(string text)
{
this.label1.Text = text;
}
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下面是Form3的代码,它使用的Form2传来的text累计显示在它的textBox1中。
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private void button1_Click(object sender, System.EventArgs e)
{
Form2 form2 = new Form2();
form2.SendText = new SendTextDelegate(this.form3Text);
form2.Show();
}
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public void form3Text(string text)
{
this.textBox1.Text += text;
}
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下面是Form1的代码,它把Form2的传过来的text直接显示中它的label1上了。
![](/Images/OutliningIndicators/None.gif)
![](/Images/OutliningIndicators/None.gif)
![](/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/InBlock.gif)
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![](/Images/OutliningIndicators/None.gif)
下面是Form3的代码,它使用的Form2传来的text累计显示在它的textBox1中。
![](/Images/OutliningIndicators/None.gif)
![](/Images/OutliningIndicators/None.gif)
![](/Images/OutliningIndicators/ExpandedBlockStart.gif)
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