错误的OnClientClick事件 - 处理条款要求WithEvents就 [英] Error onclientclick event - Handles clause requires WithEvents

问题描述

我有事件的OnClientClick这是给我这个错误此关闭按钮。它工作在一些网页和anothers不起作用。我想不通为什么。有一个在code页面把手后蓝色的下划线。

 ＆LT; ASP：按钮的ID =EditButton=服务器的CausesValidation =FALSE的CommandName =编辑文本=编辑的CssClass =btnclass/＆GT;
＆LT; ASP：按钮的ID =btnClose=服务器文本=关闭的CssClass =btnclass的OnClientClick =btnClose_Click（）/＆GT;保护小组btnClose_Click（发送者为对象，E作为EventArgs的）把手btnClose.Click
    Me.Dispose（）
    的Response.Redirect（〜/ SearchForm.aspx，FALSE）
结束小组
 

解决方案

的OnClientClick 是当您点击客户端的按钮应该执行的JavaScript code -侧。但你处理 Button.Click -event这是一个服务器端的事件。

因此​​，这个按钮需要与创建 WithEvents就 （在VB.NET）如果你在设计中添加一个按钮，自动完成。

所以一定有某个地方在codebehind类（或 aspx.designer.vb 文件）这样的：

 昏暗的WithEvents就btnClose作为新按钮
 

您还可以通过添加 <$ ASPX页面上，而不是事件处理程序C $ C>把手 ：

 ＆LT; ASP：按钮的ID =btnClose=服务器文本=关闭的CssClass =btnclass
    的OnClick =btnClose_Click
    的OnClientClick =btnClose_ClientClick（）/＆GT;
 

注意 btnClose_ClientClick 是js- code可以是一个js功能。顺便说一句，如果你想prevent从客户端返回的回发假从的OnClientClick ：

 的OnClientClick =返回btnClose_ClientClick（）;
 

（presuming的 btnClose_ClientClick 返回布尔）

I have this close button with onclientclick event which is giving me this error. It works in some pages and doesn't work in anothers. I cannot figure out why. There is a blue underline after Handles in the code page.

<asp:Button ID="EditButton" runat="server" CausesValidation="False" CommandName="Edit" Text="Edit" CssClass="btnclass" />
<asp:Button ID="btnClose" runat="server" Text="Close" CssClass="btnclass" OnClientClick="btnClose_Click()" />

Protected Sub btnClose_Click(sender As Object, e As EventArgs) Handles btnClose.Click
    Me.Dispose()
    Response.Redirect("~/SearchForm.aspx", False)
End Sub

解决方案

OnClientClick is the javascript code that should be executed when you click on the button on client-side. But you are handling the Button.Click-event which is a serverside event.

Therefore this button needs to be created with WithEvents (in VB.NET) which is done automatically if you add a button in the designer.

So there must be somewhere in the codebehind class (or in the aspx.designer.vb file) this:

Dim WithEvents btnClose As New Button

You can also add the event handler on the aspx page instead of via Handles:

<asp:Button ID="btnClose" runat="server" Text="Close" CssClass="btnclass" 
    OnClick="btnClose_Click" 
    OnClientClick="btnClose_ClientClick()" />

Note that btnClose_ClientClick is the js-code which can be a js-function. By the way, if you want to prevent the postback from client-side return false from OnClientClick:

OnClientClick="return btnClose_ClientClick();" 

( presuming that btnClose_ClientClick returns a bool )

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