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Babe Zaharias
Babe Zaharias

Total Post:19

Posted on    June-11-2013 8:37 AM

 VB.Net VB.Net 

 1 Reply(s)
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Hi Expert, 

I have a ComboBox containing 5 values. An empty line, "Credit", "Debit", "Credit Settlement", and "Debit Settlement". I am trying to perform an error validation on it. If the user types anything in the ComboBox or if the selection of the empty string is made, I want to trigger an error. This is what I have now but it doesn't work. Any ideas?

If cboTypeRes.Text.Trim = "" or cboTypeRes.Text.Trim <> "Debit" Or cboTypeRes.Text.Trim <> "Credit" Or cboTypeRes.Text.Trim = "Debit Settlement" Or 

cboTypeRes.Text.Trim = "Credit Settlement" Then

Thanks in advance for any recommendations or solutions.


Total Post:604

Posted on    June-12-2013 7:24 AM

Hi Babe,

Check if the selected item is contained in the Items collection

if cboTypesRes.SelectedItem Is Nothing Then
    Dim curText = cboTypesRes.SelectedItem.ToString().Trim()
    if curText.Length = 0 OrElse Not cboTypesRes.Items.Contains(curText) Then
    End If
End If

A little update:

The SelectedItem property could be Nothing when the user types the word directly or you user could types the word with a lower case first letter.
If you find these scenarios acceptable then you could try with this change

Dim curText = CultureInfo.CurrentCulture.TextInfo.ToTitleCase(cboTypeRes.Text)
if curText.Length = 0 OrElse Not cbo.Items.Contains(curText) Then
End If

 I hope it helpful for you.

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