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7.8

Databinding combobox selection to label

Asked by running32 in Microsoft Visual Basic.Net

I am trying to bind the combobox value member to a label but I keep getting the error  below when I get to line Me.Label31.DataBindings.Add("Text", mhcppro, "lngContactid").  There are row in the dataset.  Can someone please tell me where I am going wrong.  Thank you

An unhandled exception of type 'System.NullReferenceException' occurred in system.dll
Additional information: Object reference not set to an instance of an object 
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Private Sub comboTest_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles comboTest.MouseDown
        If fillpre = True Then
         
           Dim mhcppro As New DataView(DsPAPresciptionby211.tblContact)
            comboTest.DataSource = mhcppro
            comboTest.DisplayMember = "name"
            Me.Label31.DataBindings.Clear()
            Me.Label31.DataBindings.Add("Text", mhcppro, "lngContactid")
            SqlParametersDB.Name.contactid = Label31.Text
                fillpre = False
        End If
        If comboTest.Text <> "" Then
            comboTest.DroppedDown = True
        End If
 
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[+][-]09/02/09 11:24 AM, ID: 25244001Accepted Solution

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Zone: Microsoft Visual Basic.Net
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Solution Provided By: Protuhj
Participating Experts: 3
Solution Grade: A
 
[+][-]09/02/09 01:57 PM, ID: 25245628Assisted Solution

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[+][-]09/04/09 07:09 AM, ID: 25259812Expert Comment

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