Anil Chauhan

• Aug 29th, 2007

 

We can identify that the page is post back or not just check the Ispostback property of the page. If page is postback this property contain always true otherwise false.

rajivfromharyana

 Profile Answers by rajivfromharyana 

• May 5th, 2008

 

By Using isPostBack() method

Shanmugapriya Priya

 Profile Answers by Shanmugapriya Priya 

• Jul 6th, 2011

 

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (IsPostBack)
Response.Write(getPostBackControlName());
}

private string getPostBackControlName()
{
Control control = null;
//first we will check the "__EVENTTARGET" because if post back made by the controls
//which used "_doPostBack" function also available in Request.Form collection.
string ctrlname = Page.Request.Params["__EVENTTARGET"];
if (ctrlname != null && ctrlname != String.Empty)
{
control = Page.FindControl(ctrlname);
}
// if __EVENTTARGET is null, the control is a button type and we need to
// iterate over the form collection to find it
else
{
string ctrlStr = String.Empty;
Control c = null;
foreach (string ctl in Page.Request.Form)
{
//handle ImageButton they having an additional "quasi-property" in their Id which identifies
//mouse x and y coordinates
if (ctl.EndsWith(".x") || ctl.EndsWith(".y"))
{
ctrlStr = ctl.Substring(0, ctl.Length - 2);
c = Page.FindControl(ctrlStr);
}
else
{
c = Page.FindControl(ctl);
}
if (c is System.Web.UI.WebControls.Button ||
c is System.Web.UI.WebControls.ImageButton)
{
control = c;
break;
}
}
}
if(control!=null)
// return control.ID; // for simple page without any masterpage.
return control.UniqueID; // where its a contentpage and if master page is there
else
return "";

}
}