How to restrict non-numeric input in datagridview

Question

0.00/5 (No votes)

See more:

I'm hoping to find out a way to restrict a user from entering any non-numeric input into my datagridviewcolumn. Also I have already restricted the user from entering any negative numbers and from leaving the cell blank. If anyone can find a way to restrict the user from entering letters and non-numeric input I would greatly appreciate it!

VB

If (e.ColumnIndex = 8) Then 'This specifies the column number
        Dim cellData = DataGridView1.Rows(e.RowIndex).Cells(e.ColumnIndex).Value
        If cellData Is Nothing OrElse IsDBNull(cellData) OrElse cellData.ToString = String.Empty Then
            MessageBox.Show("Cannot Be Empty")
            DataGridView1.Rows(e.RowIndex).Cells(e.ColumnIndex).Value = 0
        ElseIf cellData < 0 Then
            MessageBox.Show("Negatives Values Not Allowed")
            DataGridView1.Rows(e.RowIndex).Cells(e.ColumnIndex).Value = 0

            Exit Sub

        End If
    End If

Posted 3-Jul-13 8:34am

CAS1224

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

mgoad99 · Answer 1 · 2013-07-03T12:06:00

Try regular expression.
I think a function like this would work to give you a true/false if the value in the column is valid
It will only allows numbers.

C#

private static bool IsNumeric(string cellData)
        {
            System.Text.RegularExpressions.Regex rx = new System.Text.RegularExpressions.Regex("^[0-9]*");
            return rx.IsMatch(cellData);
        }