CODEWITHSUNDEEP
c#eventargs
Ziad Saad
Ziad Saad

Reputation: 43

C# KeyChar error

Hello everyone i made C# program and i want to make textbox only accept Number i tryed many different code and i get same errors please help this is my code 

    private void agetxt_Click(object sender, EventArgs e)
    {
        if (!char.IsControl(e.KeyChar) && !char.IsDigit(e.KeyChar))
        {
            e.Handled = true;
        }
    }

and this is the error message i get

Error CS1061 'EventArgs' does not contain a definition for 'KeyChar' and no extension method 'KeyChar' accepting a first argument of type 'EventArgs' could be found (are you missing a using directive or an assembly reference?) WindowsFormsApplication1 C:\Users\ziadm\Documents\Visual Studio 2015\Projects\WindowsFormsApplication1\WindowsFormsApplication1\Form2.cs 176 Active

Upvotes: 0

Views: 4977

Answers (1)

Westerlund.io
Westerlund.io

Reputation: 2833

You're using a Click event which doesn't contain the KeyChar property. You'd probably like to use the KeyPress event on the TextBox and implement the same logic which incorporates the KeyChar property to be able to check if the typed character is a digit or not.

 public Form1()
    {
        InitializeComponent();
        agetxt.KeyPress += agetxt_KeyPress;
    }


    private void agetxt_KeyPress(object sender, KeyPressEventArgs e)
    {
        if (!char.IsDigit(e.KeyChar))
        {
            e.Handled = true;
        }
    }

Upvotes: 4

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