Capture button click event of webform 2 in webform

问题:

I have 2 webforms the closeporject button in webform 1 redirects to Webform 2 and asks whether do you really want to close the project. How can I capture the button click event of webform 2 in webform 1 ? Someone told me it has to do something with querystring in address bar. I am not allowed to use javascript to display my message box.

回答1:

You can post data from one page to the other. Here from Page2.aspx to Page1.aspx as

On the page2, you set PostBackUrl on the button that say Continue/Select what ever.

PostBackUrl="Page1.aspx"

and on Page1.aspx you set where can read the posted data.

<%@ PreviousPageType VirtualPath="~/Page2.aspx" %>

and you get the data as

if (Page.PreviousPage != null)
{
    if(Page.PreviousPage.IsCrossPagePostBack == true)
    {
        // here you can get from Page2.aspx==PreviousPage
        //  a check box check, what ever you like...
        GetTheClass = PreviousPage.MyDataClass;
    }
}

relative: Cross-page posting. Is it a good pratice to use PreviousPage in Asp.net?

More about Cross Page posting: http://msdn.microsoft.com/en-us/library/ms178139.aspx