Restricting textbox input to numbers in C# [closed]

Answer 1

You can use the Microsoft.VisualBasic.Information.IsNumeric is numeric function. Just add the reference Microsoft.VisualBasic

private void textBox1_Validating(object sender,
        System.ComponentModel.CancelEventArgs e) {
    if (!Microsoft.VisualBasic.Information.IsNumeric(textBox1.Text)) {
        e.Cancel = true;
    } else {
        // Do something here
    }
}

This allows the user to enter scientific notation which is not trivial to filter for.