关于delegate() 的语法

[kyo_siye]

代码片断
public class Splasher
{
private static Form m_SplashForm = null;
private static ISplashForm m_SplashInterface = null;
private static Thread m_SplashThread = null;
private static string m_TempStatus = string.Empty;


/// <summary>
/// 显示启动画面
/// </summary>
public static void Show(Type splashFormType)
{
if (m_SplashThread != null)
return;
if (splashFormType == null)
{
throw (new Exception("必须设置启动窗体"));
}

m_SplashThread = new Thread(
new ThreadStart(delegate()
{
CreateInstance(splashFormType);
Application.Run(m_SplashForm);
}
));
m_SplashThread.IsBackground = true;
m_SplashThread.SetApartmentState(ApartmentState.STA);
m_SplashThread.Start();
}


这段代码是什么意思，没有见过delegate的这种用法，多谢大虾们
delegate()
{
CreateInstance(splashFormType);
Application.Run(m_SplashForm);
}

[www_123du_com]

能编译通过吗？
我也没见过。

[diandian82]

好像是2。0里面的新东西。我在msndn上见过类似的东西。

[kyo_siye]

编译的过，上面的只是代码片断，我把全部代码贴出来吧
using System;
using System.Windows.Forms;
using System.Threading;
using System.Reflection;

namespace SplashScreen
{
public class Splasher
{
private static Form m_SplashForm = null;
private static ISplashForm m_SplashInterface = null;
private static Thread m_SplashThread = null;
private static string m_TempStatus = string.Empty;


/// <summary>
/// 显示启动画面
/// </summary>
public static void Show(Type splashFormType)
{
if (m_SplashThread != null)
return;
if (splashFormType == null)
{
throw (new Exception("必须设置启动窗体"));
}



m_SplashThread = new Thread(
new ThreadStart(delegate()
{
CreateInstance(splashFormType);
Application.Run(m_SplashForm);
}
));
m_SplashThread.IsBackground = true;
m_SplashThread.SetApartmentState(ApartmentState.STA);
m_SplashThread.Start();
}



/// <summary>
/// 设置加载信息
/// </summary>
public static string Status
{
set
{
if (m_SplashInterface == null || m_SplashForm == null)
{
m_TempStatus = value;
return;
}
m_SplashForm.Invoke(
new SplashStatusChangedHandle(delegate(string str) { m_SplashInterface.SetStatusInfo(str); }),
new object[] { value }
);
}

}

/// <summary>
/// 关闭启动画面
/// </summary>
public static void Close()
{
if (m_SplashThread == null || m_SplashForm == null) return;

try
{
m_SplashForm.Invoke(new MethodInvoker(m_SplashForm.Close));
}
catch (Exception)
{
}
m_SplashThread = null;
m_SplashForm = null;
}



private static void CreateInstance(Type FormType)
{

object obj = FormType.InvokeMember(null,
BindingFlags.DeclaredOnly |
BindingFlags.Public | BindingFlags.NonPublic |
BindingFlags.Instance | BindingFlags.CreateInstance, null, null, null);
m_SplashForm = obj as Form;
m_SplashInterface = obj as ISplashForm;
if (m_SplashForm == null)
{
throw (new Exception("启动窗体类型必须是System.Windows.Forms.Form的子类"));
}
if (m_SplashInterface == null)
{
throw (new Exception("启动窗体必须实现ISplashForm接口"));
}

if (!string.IsNullOrEmpty(m_TempStatus))
m_SplashInterface.SetStatusInfo(m_TempStatus);
}


private delegate void SplashStatusChangedHandle(string NewStatusInfo);

}

/// <summary>
/// 启动窗体接口
/// </summary>
public interface ISplashForm
{
void SetStatusInfo(string NewStatusInfo);
}
}

[Muf]

delegate()
{
CreateInstance(splashFormType);
Application.Run(m_SplashForm);
}


匿名函数。

语法：
返回值 delegate(参数列表){ 函数体 }
其中返回值省略，则为void。

可运用在需要函数或代理的位置。
如：
this.button1.Click += new System.EventHandler(this.button1_Click);

这里需要定义一个函数button1_Click

如果用匿名函数，则可以：
this.button1.Click += delegate(object sender, EventArgs e) { MessageBox.Show("Hello"); };