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5.15 How can I restrict the keystrokes that will be accepted in a column of my datagrid?
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You can create a custom column style and handle the KeyPress event of its TextBox member. Below is the code showing how this might be done. You can also download a sample project (C#, VB) that shows an implementation of this idea.
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public class DataGridDigitsTextBoxColumn : DataGridTextBoxColumn
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public DataGridDigitsTextBoxColumn(System.ComponentModel.PropertyDescriptor pd, string format, bool b)
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this.TextBox.KeyPress += new System.Windows.Forms.KeyPressEventHandler(HandleKeyPress);
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private void HandleKeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
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//ignore if not digit or control key
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if(!char.IsDigit(e.KeyChar) && !char.IsControl(e.KeyChar))
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//ignore if more than 3 digits
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if(this.TextBox.Text.Length >= 3 && !char.IsControl(e.KeyChar))
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protected override void Dispose(bool disposing)
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this.TextBox.KeyPress -= new System.Windows.Forms.KeyPressEventHandler(HandleKeyPress);
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