来自文件背后的ASP.NET代码的确认消息

Question

I have a login screen Login.aspx after login I want to show a confirmation message saying

"You are being redirected to the Demo page. Do you want to continue?",

if the user clicked yes, I need to redirect them to a demo page. Other wise redirect to another home page. How can I do this?

I want something like the following...

protected void Login_Click(object sender, ImageClickEventArgs e)
       {
          //some validation and calculations..

          ScriptManager.RegisterStartupScript(this, this.GetType(), "script", "confirm('You are redirecting to Demo page ". Do you want to continue" ?');", true);


          //My doubt is this
          If(ok button clicked)
          {
             //redirect to demo page
          }
          else
          {
             //redirect to home page
          }

       }

Answer 1

You wont get the result of confirm on server side. You can call a javascript function RegisterStartupScript and put this confirm dialog in that function.

Although you can somehow send value of confirm on server side using postback of some ajax call but I do not see any reason for that.

Code behind

ScriptManager.RegisterStartupScript(this, this.GetType(), "script", "RedirectDecision();", true);

Html

<script type="text/javascript">
    function RedirectDecision()
    {     
         if(confirm('You are redirecting to Demo page ". Do you want to continue" ?'))
             window.location = "http://www.yoururlFirst.com";
         else
             window.location = "http://www.yoururlSecond.com";
    }
</script>

Answer 2

You can't do that. You can call a client side function by setting OnClientClick . If user will press confirm than code behind function will be called. Have a look at below example

<asp:Button ID="Button2"  OnClick="Login_Click" OnClientClick="return UserConfirmation()"   runat="server" Text="Login" />

function UserConfirmation() {
  if(confirm('You are redirecting to Demo page ". Do you want to continue" ?'))
     return true;
  else
     return false;

    }

Here if user will press ok than code behind function will be called other wise it won't