.net validate控件用法

最新推荐文章于 2020-04-08 20:09:11 发布

转载最新推荐文章于 2020-04-08 20:09:11 发布 · 1.1k 阅读

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#.net #textbox #button #callback #dialog #server

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本文介绍在ASP.NET中如何解决客户端验证与弹窗确认的先后顺序问题，通过简单的JavaScript调整确保用户体验的同时完成必要的表单验证。

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http://www.cnblogs.com/newr2006/archive/2008/07/11/1240910.html

JS script

function ConfirmMe()
{
return confirm("Do you want to proceed?");
}

ASPX

<asp:TextBox id="txtName" runat="server"/>
<asp:Button id="btnSubmit" OnClientClick="return ConfirmMe()" Text="Submit" runat="server"/>

Well, that is pretty straightforward. BUT, it goes weird when you have a validator control (eg. RequiredFieldValidator) that is used to validate the "txtName" textbox server control. For instance,

<asp:TextBox id="txtName" runat="server"/>

<asp:RequiredFieldValidator id="rq1" ControlToValidate="txtName" ErrorMessage="Name cannot be blank" Display="Dynamic" runat="server"/>

<asp:Button id="btnSubmit" OnClientClick="return ConfirmMe()" Text="Submit" runat="server"/>

Whenever you press the button with no textbox value, the client-side confirmation dialog will be invoked first before the validator message is able to show up. This isn't what we expected it to behave. I tried several ways to overcome this problem, including using CLIENT CALLBACK, disabling the CauseValidation, but it failed. Finally, I was able to find a solution by adding JUST ONE line in the JS script.

function ConfirmMe()
{
   if(Page_ClientValidate() )
      return confirm('Do you want to proceed?');

   return false;
}