[Solved] Themed PrimaryIconUrl

[Matt]

Hello,

I've got a RadButton with a custom icon working, but I want to use an image from my App_Themes/Blue/Images folder.

I can hardcode the Url like this:

<telerik:RadButton ID="btnLogin" runat="server" Text="Login" OnClick="btnLogin_Click">
    <Icon PrimaryIconUrl="App_Themes/Blue/Images/ButtonImage.gif" PrimaryIconLeft="5" PrimaryIconTop="5" />
 </telerik:RadButton>

But I want to do something like this:

<telerik:RadButton ID="btnLogin" runat="server" Text="Login" OnClick="btnLogin_Click">
    <Icon PrimaryIconUrl='<%# GetThemedUrl("Images/ButtonImage.gif")%>' PrimaryIconLeft="5" PrimaryIconTop="5" />
</telerik:RadButton>

protected string GetThemedUrl(string path)

{

     string url = "~/App_Themes/" + this.Theme + "/" + path;

     return url;

}



However I get an exception saying:

Parser Error

Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Databinding expressions are only supported on objects that have a DataBinding event. Telerik.Web.UI.RadButtonIcon does not have a DataBinding event.

Can this be done? Is there a better way?

Thanks in advance,
Matt

[Danail Vasilev]

Hi Matt,

The RadButton is not a databound control, therefore you cannot use databinding expressions upon it. What you can do, instead of that is to access its properties in the code behind (for example in Page_Load() event) and set the desired values to them. For example:
ASPX:

<telerik:RadButton ID="btnLogin" runat="server" Text="Login" OnClick="btnLogin_Click">
    <Icon PrimaryIconUrl="" PrimaryIconLeft="5" PrimaryIconTop="5" />
</telerik:RadButton>

C#:

protected void Page_Load(object sender, EventArgs e)
{
    btnLogin.Icon.PrimaryIconUrl = GetThemedUrl("Images/ButtonImage.gif");
}

protected string GetThemedUrl(string path)
{
    string url = "~/App_Themes/" + this.Theme + "/" + path;
    return url;
}

Regards,
Danail Vasilev
Telerik