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MultiColumnComboBox selected value not working in the case of USERCONTROLER

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MultiColumn ComboBox
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Jihad asked on 29 Sep 2020, 02:20 PM

Hello , 

I need to change the selected value in my parent form but the component is in the user controller .

So when I set the value to the multicombobox does not work knowing that the text and selected index take the value well .


                    Dim page As New RadPageViewPage()
                    Dim panel As New MyPanel()
                    strip= TryCast(RadPage1.ViewElement, RadPageViewStripElement)
                    page.Text = "page" & (strip.Items.Count + 1)
                    Dim Liste1 As List(Of object) 
                    panel.RadMultiColCmbo1.DisplayMember = "Name"
                    panel.RadMultiColCmbo1.ValueMember = "PK"
                    panel.RadMultiColCmbo1.DataSource = Liste1

                    dim object 1 = myobject 

                   panel.RadMultiColCmbo1.Selectedvalue =myobject.PK 


Please help! 

Thank you 



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answered on 02 Oct 2020, 01:14 PM

Hello, Jihad,

If I understand you correctly, you have RadMultiColumnComboBox control which you use within a UserControl and you want to set the SelectedValue property to some value in the parent form.

I created a sample project where I created a user control with RadMultiColumnComboBox in order to test this and it seems to work correctly on my end. When I set the SelectedValue property in the main form the value is shown correctly in the multicolumn combo box.

Public Class UserControl1
    Public Sub New()
        Dim people As List(Of Person) = New List(Of Person)()

        For i As Integer = 0 To 50 - 1
            people.Add(New Person() With {
                .Id = i,
                .Name = "Name " & i

        Me.RadMultiColumnComboBox1.DataSource = people
        Me.RadMultiColumnComboBox1.ValueMember = "Id"
        Me.RadMultiColumnComboBox1.DisplayMember = "Name"
    End Sub

    Public ReadOnly Property RadMultiColumnComboBox As RadMultiColumnComboBox
            Return Me.RadMultiColumnComboBox1
        End Get
    End Property
End Class

Public Class Person
    Public Property Id As Integer
    Public Property Name As String
End Class

' Main Form
Public Class RadForm1
    Public Sub New()
        Dim control As UserControl1 = New UserControl1()
        control.RadMultiColumnComboBox.SelectedValue = 2
    End Sub
 End Class

I attached my test project for your reference. Could you please refer to it and let me know how it differs from your set up?

I am looking forward to your reply.

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