IMPLEMENT: Value and FindDropDownByValue property for the RadToolBarDropDown

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Last Updated: 07 Dec 2020 13:34 by ADMIN

ADMIN

Vera

Created on: 28 May 2013 13:30

Category: ToolBar

Type: Feature Request

IMPLEMENT: Value and FindDropDownByValue property for the RadToolBarDropDown

1 comment

ADMIN

Peter Milchev

Posted on: 07 Dec 2020 13:34

Hello,

In most cases, the value is used to access a ToolBar item. If the Value of the RadToolBarDropDown is set by the selected button's value, it will not be a reliable way to identify a dropdown item.

That is why, for obtaining a RadToolBarDropDown item, you can use the Attributes collection of the server-side item object. Here is a simple example of how to do that. Note that you can add them either in the markup or from the code-behind. The runat=server for the item markup is not necessary, it will still work but Visual Studio might underline it as a warning.

<telerik:RadToolBar runat="server" ID="RadToolbar1"> 
    <Items>
        <telerik:RadToolBarDropDown data-id="my-dropdown-item">
            <Buttons>
                <telerik:RadToolBarButton Text="Button markup"></telerik:RadToolBarButton>
            </Buttons>
        </telerik:RadToolBarDropDown>
    </Items>
</telerik:RadToolBar>

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        var ddl = RadToolbar1.FindItem(x => x.Attributes["data-id"] == "my-dropdown-item") as RadToolBarDropDown;
        ddl.Buttons.Add(new RadToolBarButton("Button code behind"));
    }
}

FindItemByAttribute can be easily implemented as an extension method until it is built-in:

https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-and-structs/extension-methods

public static class TelerikToolBarExtensions{
    public static RadToolBarItem FindItemByAttribute(this RadToolBar toolbar, string attribute, string value)
    {
        return toolbar.FindItem(x => x.Attributes["data-id"] == "my-dropdown-item");
    }
}

public partial class Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
           
            //var ddl = RadToolbar1.FindItem(x => x.Attributes["data-id"] == "my-dropdown-item") as RadToolBarDropDown;
            var ddl = RadToolbar1.FindItemByAttribute("data-id","my-dropdown-item") as RadToolBarDropDown;
            ddl.Buttons.Add(new RadToolBarButton("Button code behind"));
        }
    }
}

Regards,
Peter Milchev
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