ColorPicker in a DetailView

[Michael]

I'm trying to use a ColorPicker in a DetailView to allow a user to change the assigned color of a matching record. Below is my code:

<asp:TemplateField>
<HeaderStyle/>
<HeaderTemplate>AssignedColor:</HeaderTemplate>
<EditItemTemplate><telerik:radcolorpicker ID="rcpAssignedColor" runat="server" preset="Standard" SelectedColor='<%#Bind("AssignedColor")%>'></telerik:radcolorpicker></EditItemTemplate>
<ItemTemplate><%#Eval("AssignedColor")%></ItemTemplate>
</asp:TemplateField>

But when I view the page with loaded data and switch to Edit mode I'm getting the following error on the EditItemTemplate line: System.InvalidCastException: Specified cast is not valid.

Is there another way to bind data to the ColorPicker control?

[Tsvetie]

Hello Michael Barbu,
For information how to bind the color picker control, please refer to our How to insert and update records in a RadGrid with columns that contain RadColorPicker knowledge base article. Even though the article is for a grid control, the approach for DetailsView is the same.

Greetings,
Tsvetie
the Telerik team

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[Michael]

Well, that got me 1 step closer. It is now displaying the HEX value from the database, but for some reason the value is not getting pulled by the DataSource. Is there something I'm missing?

[Michael]

Thank you Tsvetie, you put me in the correct place. Here is what I have on the backend:

    Private ColorPicker As RadColorPicker

    Protected Sub sdsTrack_Inserting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.SqlDataSourceCommandEventArgs) Handles sdsTrack.Inserting, sdsTrack.Updating
        Dim newAssignedColor As String
        newAssignedColor = System.Drawing.ColorTranslator.ToHtml(ColorPicker.SelectedColor)
        Dim sdsParam As New SqlParameter("@AssignedColor", newAssignedColor)
        e.Command.Parameters.Add(sdsParam)

        Me.gvwTrackList.DataBind()
    End Sub

    Protected Sub dvwTrack_ItemInserting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DetailsViewInsertEventArgs) Handles dvwTrack.ItemInserting
        For Each row As DetailsViewRow In Me.dvwTrack.Rows
            ColorPicker = CType(row.FindControl("rcpAssignedColor"), RadColorPicker)
        Next
    End Sub

    Protected Sub dvwTrack_ItemUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DetailsViewUpdateEventArgs) Handles dvwTrack.ItemUpdating
        For Each row As DetailsViewRow In Me.dvwTrack.Rows
            ColorPicker = CType(row.FindControl("rcpAssignedColor"), RadColorPicker)
        Next
    End Sub

Thanks again for your help