Find control of another page

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ASP.NET

How can i find a radiobutton control that exists in another aspx, in my current page's code behind?

Posted 5-Oct-10 23:43pm

deepak thomas

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Mohamed Mitwalli · Answer 1 · 2012-03-24T22:23:00

1. set the PostBackUrl property of the Button to the New Page

XML

<asp:button id="Button1" runat="server" text="test now " postbackurl="~/Default5.aspx" xmlns:asp="#unknown" />

or you can use

XML

<asp:Button ID="Button1" runat="server" Text="test now "
        onclick="Button1_Click2"   />

code behind

C#

protected void Button1_Click2(object sender, EventArgs e)
{
          Server.Transfer("Default5.aspx");
 
}

C#

Note :         Response.Redirect("Default5.aspx"); will raise 
Error Object reference not set to an instance of an object.

in the the other page

C#

protected void Page_Load(object sender, EventArgs e)
   {
// this is page Default5
       if (!IsPostBack)
       {
           Button btn = ((Button)PreviousPage.FindControl("Button1"));
           Button1.Text = btn.Text;
       }

   }

NMehta83 · Answer 2 · 2010-10-06T00:00:00

If you redirect to current page with "Response.Redirect" or "PostBackUrl" then below code should work. But If you starts with Page1.aspx and redirect to Page2.aspx and then redirect to Page3.aspx then you can not find control which placed on Page1.aspx. You can find control only placed with Page2.aspx.

C#

RadioButton rb = (RadioButton)PreviousPage.FindControl("RadioBtn1");

Please vote if this helped you then.

shakil0304003 · Answer 3 · 2010-10-06T08:25:00

Solution 4

If the two page is cross page then you can get the value of the control. Otherwise you have to store the value of the control in session or others.

Posted 6-Oct-10 8:25am

shakil0304003

m@dhu · Answer 4 · 2010-10-05T23:49:00

Solution 1

see here Accessing controls in the previous aspx page[^]

Posted 5-Oct-10 23:49pm

m@dhu

Comments

deepak thomas 6-Oct-10 5:58am

getting error

Object reference not set to an instance of an object

i am pasting the code below which i tried

protected void Page_Load(object sender, EventArgs e)
{
CheckBox c = (CheckBox)PreviousPage.FindControl("gendoccheck1");
}

deepak thomas 6-Oct-10 5:59am

i am opening the page in a radwindow(pop -up) of telerik controls.if so will i get the control?

m@dhu 6-Oct-10 6:13am

Is rad window present in a different page from page you are redirecting?

deepak thomas 6-Oct-10 6:18am

yes

deepak thomas 6-Oct-10 6:21am

i am opening the new page in radwindow using this javascript on OnClientClick of a button in test0.aspx page

function OpenGenDocsWindow() {

var wnd = window.radopen("test1.aspx?Id=" + ID, null);
wnd.setSize(400, 400);
return false;

}

m@dhu 6-Oct-10 8:22am

As you said rad window and radio button is in same test0.aspx and opening test1.aspx in window. As i know i dont think you could access the radio button in test1.aspx this way. Wait for others to answer.

m@dhu 7-Oct-10 3:11am

Try like this you can also get the radiobutton value through query string.
protected void Button1_Click(object sender, EventArgs e)
{
wnd.VisibleOnPageLoad = true;
wnd.NavigateUrl = "test0.aspx?Id="+ID+"&radiobutton="+btnradioValue;

}

Ankur^\m/ · Answer 5 · 2010-10-05T23:57:00

Solution 2

Adding to what other responder already said, I would suggest you to read this article on MSDN - Redirecting Users to Another Page[^].

You will understand the fundamentals of redirection and in which cases previous page values can be accessed in asp.net.

Hope this helps!

Posted 5-Oct-10 23:57pm

Ankur^\m/

Updated 6-Oct-10 0:11am

v2

Comments

deepak thomas 6-Oct-10 6:11am

i am opening the page in a radwindow(pop -up) of telerik controls.if so will i get the control?

Ankur^\m/ 6-Oct-10 6:31am

I am sorry, I haven't used Telerik controls and I have no idea about rad-window. So I won't be able to help much with this.