How to Make Sure Entered Number is in valid Range in DataGridViewCell

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Hello I'm trying to have my program give the user a message that tells them if they enter the number zero or leave the datagridviewcell blank. Right now the columns in my datagridview are populated by numbers that come from an excel spreadsheet. I not only want to display a message, but after the message pops up I want to supply a default value for the cell like "NA" that will fill the datagridviewcell. Here is what I have so far.

VB

If (e.ColumnIndex = 2) Then 'checking value for column 2 only
            Dim cellData = DataGridViewC1.Rows(e.RowIndex).Cells(e.ColumnIndex).Value.ToString
            If cellData <= 0 OrElse IsDBNull(cellData) OrElse cellData.ToString = String.Empty Then
                MessageBox.Show("Number Must Be Greater Than Zero")
                DataGridView1.Rows(e.RowIndex).Cells(e.ColumnIndex).Value = "NA"
            End If
        End If

Posted 20-Jun-13 12:26pm

CAS1224

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CHill60 20-Jun-13 20:56pm

So if this doesn't work what is the error message or problem?

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Sruthi Jain · Answer 1 · 2013-06-20T23:46:00

Solution 1

If you are using Visual Studio, you can use one of the Validation controls for your DataGridView column. And it would be Range Validator control. You can refer to http://msdn.microsoft.com/en-us/library/f70d09xt(v=vs.71).aspx[^]

Posted 20-Jun-13 23:46pm

Sruthi Jain

Updated 20-Jun-13 23:55pm

v2

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CAS1224 21-Jun-13 10:30am

I'm using VB.net 4.5, this is ASP.net. Is there a VB version of this?

Sruthi Jain 24-Jun-13 10:31am

Yes, it is all there in Google. Refer to http://www.exforsys.com/tutorials/vb.net-2005/vb.net-validation.html