Opening RadWindow conditionally on dropdown_SelectedIndexChanged

[Kati]

I have a dropdownlist and when the user selects a certain item i would like to open up the radwindow.
I have the following

protected

 

 

void ddlSentencing_SelectedIndexChanged(object sender, EventArgs e)

 

{

 

 

 

    if (selectedVal == 2 || selectedVal == 3)

 

    {

        ddlSentencing.Attributes.Add(

 

"onclick", "openRadWinNew(); return false;");

 

    }

}

 

 

function openRadWinNew() {

 

 

 

var url = "Dialog.aspx";

 

 

 

var oWnd = radopen(url, "ResponsePopup").setSize(500, 300)

 

}

it works but always only on second click, one step behind. Can ypu please help me fix this?

Thanks

[Marin Bratanov]

Hello Kati,

You are only adding the handler when the dropdownlist posts back. You need to add it in the page markup or in the Page_Load/Page_Init events so that the client-side handler is available for the first click as well.


Kind regards,
Marin Bratanov
the Telerik team

[Kati]

Thanks. I have changed my code to this but it is still always one step behind

 

 

protected void Page_Load(object sender, EventArgs e)

 

{

 

 

    if (SentencingID == 2 || SentencingID == 3)

 

    {

        ddlSentencing.Attributes.Add(

 

"onchange", "openRadWinNew(); return false;");

 

    }

}

if the first item i select is 2 the popup does not open. If then I select 3 it opens but it thinks it's a 2

[Marin Bratanov]

Hello Kati,

If you want only certain items to open the RadWindow you can use the logic in the selectedIndexChanged event, but instead of adding handlers for the dropdownlist - simply initiate the show() call from the code-behind, as explained in this sticky thread: http://www.telerik.com/community/forums/aspnet-ajax/window/opening-radwindow-from-the-server.aspx.


Greetings,
Marin Bratanov
the Telerik team

[Kati]

I have tried the code you pointed me to, but sadly I am geeting an error

string script = "function f(){$find(\"" + RadWindow1.ClientID + "\").show(); Sys.Application.remove_load(f);}Sys.Application.add_load(f);"; 

    ScriptManager.RegisterStartupScript(Page, Page.GetType(), "key", script, true); 

"'null' is null or not an object

 

"

[Princy]

Hi Kati,

Here is the full code that I tried based on your scenario.
aspx:

<telerik:RadWindow ID="RadWindow1" runat="server" ></telerik:RadWindow>
<asp:DropDownList ID="ddl" runat="server" AutoPostBack="true" onselectedindexchanged="ddl_SelectedIndexChanged">
  <asp:ListItem Value="1"></asp:ListItem>
  <asp:ListItem Value="2"></asp:ListItem>
  <asp:ListItem Value="3"></asp:ListItem>
  <asp:ListItem Value="4"></asp:ListItem>
  <asp:ListItem Value="5"></asp:ListItem>
</asp:DropDownList>

C#:

protected void ddl_SelectedIndexChanged(object sender, EventArgs e)
{
  if (ddl.SelectedValue.ToString() == "2" || ddl.SelectedValue.ToString() == "3")
  {
    string script = "function f(){$find(\"" + RadWindow1.ClientID + "\").show(); Sys.Application.remove_load(f);}Sys.Application.add_load(f);";
    ScriptManager.RegisterStartupScript(Page, Page.GetType(), "key", script, true);
  }
}

Thanks,
Princy.

[Harendra]

Hi, Although this post is quite old but i am facing the same issue. i have radwindow is bind to a button on its click it working properly. now coming to the issue part i want the same window to be called on page load, but only after it is validated against some conditions from database. Click is working fine but not able to call the radwindow on page load....

[Attila Antal]

Hi Harendra,

Opening a RadWindow on the server is done the way it is described in that document posted by Marin.

If the RadWindow does not open as expected, there might be other problems preventing it.

I suggest that you open the browser's developer tools and monitor the console tab while testing the application. If you notice JavaScript errors, please eliminate them first. If there are no JavaScript errors, then you can try to register the ClientScript on the server according to the article and test the application again.

Here is a Blog Post with tips to debug apps in the browser: Improve Your Debugging Skills with Chrome DevTools

Ultimately, if you have not managed to fix the problem, please share all the details that will help us replicate the same exact problem. We will check the cause and tell you how to fix it.

Regards,
Attila Antal
Progress Telerik