GridViewComboBoxColumn Value Only Visible on Edit

[Crane101]

Hi,
I have seen variations of this question asked on several different posts, but either the fix has either been irrelevant to my particular situation or the question has gone unanswered. I have created a simplified example that you can run on your own computer, so as to easily demonstrate my problem.

I have a simple class "dog" which contains a property "Breed" of enum type "DogBreeds". I wish to display this value in a GridView combo box, but using more user-friendly text than the enum values.

This is my data class:

Public Class Dog

    Private dmName As String
    Private dmColour As String
    Private dmBreed As DogBreeds

    Public Sub New(ByVal _name As String, ByVal _colour As String, ByVal _breed As DogBreeds)
        MyBase.New()
        dmName = _name
        dmColour = _colour
        dmBreed = _breed
    End Sub

    Public Property Name() As String
        Get
            Return dmName
        End Get
        Set(ByVal value As String)
            dmName = value
        End Set
    End Property

    Public Property Colour() As String
        Get
            Return dmColour
        End Get
        Set(ByVal value As String)
            dmColour = value
        End Set
    End Property

    Public Property Breed() As DogBreeds
        Get
            Return dmBreed
        End Get
        Set(ByVal value As DogBreeds)
            dmBreed = value
        End Set
    End Property

End Class

And my Enum:

Public Enum DogBreeds
    Staff
    Husky
    GShep
End Enum

To demonstrate the problem, create a GridView on a form called "dgv" and add the following code:

'Add some example data
dogs = New List(Of Dog)
dogs.Add(New Dog("Sacha", "Brown", DogBreeds.Staff))
dogs.Add(New Dog("Nimbus", "Black/Brown", DogBreeds.GShep))
dogs.Add(New Dog("Chinook", "White", DogBreeds.Husky))

'Set the grid data source:
dgv.DataSource = dogs

'Create the data source for the combo column, comprosed of a column of the enum and a column of the
' "friendly" string represetion for that enum value
Dim dtBreeds As New DataTable
dtBreeds.Columns.Add("BreedEnum", GetType(DogBreeds))
dtBreeds.Columns.Add("BreedName", GetType(String))
dtBreeds.Rows.Add(DogBreeds.GShep, "German Sheppard")
dtBreeds.Rows.Add(DogBreeds.Husky, "Icelandic Husky")
dtBreeds.Rows.Add(DogBreeds.Staff, "Staffordshire Bull Terrier")

'Set the column display and value members and the data source for the combo
With DirectCast(dgv.Columns("Breed"), GridViewComboBoxColumn)
        .DisplayMember = "BreedName"
        .ValueMember = "BreedEnum"
        .DataSource = dtBreeds
End With

Run the form. All the combos are blank, but when you click on a combo cell, the correct value is displayed, but disappears again when focus is lost from the cell, so it looks like a display bug. I have successfully used this method on a DataGrid, so not sure why it does not work here.

Any help much appreciated

Shane

[Jack]

Hello Crane101, please find the answer to your question in your previous post regarding the same issue. Please, avoid posting the same question twice as this may slow down our response. Thank you for your understanding.
 
Regards,
Jack
the Telerik team

[Eric]

I am having the exact same issue, but can't find the earlier thread you are referring to.

[Jack]

Hi Eric,

I am posting here my response to Shane Parker's question:

I confirm that it appears in our latest release and you should be able to use this code to do the job. I logged the issue in our bug tracking system and it will be addressed in one of our upcoming releases. The only solution to work around the issue is to handle the CellFormatting event and set the value manually. Please consider the following sample:

Private Sub radGridView1_CellFormatting(sender As Object, e As CellFormattingEventArgs)
    If e.CellElement.ColumnInfo.Name = "Breed" Then
        If e.CellElement.Value IsNot Nothing Then
            Dim breed As DogBreeds = DirectCast(e.CellElement.Value, DogBreeds)
            e.CellElement.Text = dtBreeds.Rows(CInt(breed))("BreedName").ToString()
        End If
    End If
End Sub

I hope it helps. If you have any questions, do not hesitate to contact us.
 
All the best,
Jack
the Telerik team

[Eric]

Hi Jack,

While I am experiencing the same symptoms that Shane Parker did, I am using the Silverlight GridView which does not have a CellFormatting event (or a CellElement.Text property for that matter). Is there a similar workaround on a different event I should try?
I tried handling the CellEditEnding event and manually setting Cell.Value to the NewData value, but that did not do anything.

Thanks again,
Eric

Also, I can read VisualBasic, but I'm using C#. :)

[Dimitrina]

Hi Eric,

As this question is related to another product, would you please post your question in the related Silverlight forum? There you can provide a link to this thread and we will gladly answer your question.

Best wishes,
Didie
the Telerik team