为什么 (sender,e) => SomeAction() 适用于 winform，不适用于 asp.net

发布于 2024-09-29 04:11:07 字数 257 浏览 2 评论 0原文

我有以下代码：

btnTest.Click += (sender,e) => SomeAction()

为什么此代码在 WinForms 中有效，而在 asp.net 中无效。在 asp.net 中，我必须执行以下操作：

btnTest.Click += new EventHandler(SomeAction);

两种情况下的目标框架都是 .net 4.0

原文

I have the following code:

btnTest.Click += (sender,e) => SomeAction()

why does this code works in WinForms and not in asp.net. In asp.net I had to do the following:

btnTest.Click += new EventHandler(SomeAction);

target framework in both cases is .net 4.0

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明明#如月 2024-10-06 04:11:08

您是否可能尝试

btnTest.Click += (sender,e) => SomeAction()

从 Page_Load 方法或另一个事件处理程序内部调用？在这种情况下，参数“sender”和“e”已经声明并且可能会导致冲突。

将定义更改为：

btnTest.Click += (s,ea) => SomeAction();

您可能希望将参数转发给您的函数：

btnTest.Click += (s,ea) => SomeAction(s, ea);

Is it possible you are trying to call

btnTest.Click += (sender,e) => SomeAction()

from inside the Page_Load method or another event handler? In that case the parameters "sender" and "e" are already declared and can be causing a conflict.

Change the definition to:

btnTest.Click += (s,ea) => SomeAction();

You'll probably want to forward the arguments to your function though:

btnTest.Click += (s,ea) => SomeAction(s, ea);

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红ご颜醉 2024-10-06 04:11:08

对我来说 ASP.NET 4.0 工作正常：

public partial class _Default : System.Web.UI.Page
{
   protected void Page_Load(object sender, EventArgs e)
   {
   }

   private void SomeFunc()
   {
      Button1.Click += (sender, e) => SomeAction();
   }

   private void SomeAction()
   {
   }
}

It works fine is ASP.NET 4.0 for me:

public partial class _Default : System.Web.UI.Page
{
   protected void Page_Load(object sender, EventArgs e)
   {
   }

   private void SomeFunc()
   {
      Button1.Click += (sender, e) => SomeAction();
   }

   private void SomeAction()
   {
   }
}

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