TextBox takes input only letters

Try this code.....

//Function

public static bool IsDigit(string tcString)
        {
            //get the first character in the string
            char c = tcString[0];
            return Char.IsDigit(c);
        }

//button_click event

        private void button1_Click(object sender, EventArgs e)
        {
            char[] letters=new char[50];
            int len = textBox1.Text.Length;

            for (int j = 0; j < len; j++)
            {
                letters[j] = Convert.ToChar(textBox1.Text.Substring(j, 1));
            }

            for (int i = 0; i < len; i++)
            {

                bool result = IsDigit(letters[i].ToString());
                if (result == true)
                {
                    MessageBox.Show(letters[i]+"is a digit");
                }
            }


        }

if you need any clarification regarding above code please write to me......

3 Replies

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Charith Liyanagamage17y ago
Accepted answer
Try this code.....

//Function

public static bool IsDigit(string tcString)
        {
            //get the first character in the string
            char c = tcString[0];
            return Char.IsDigit(c);
        }

//button_click event

        private void button1_Click(object sender, EventArgs e)
        {
            char[] letters=new char[50];
            int len = textBox1.Text.Length;

            for (int j = 0; j < len; j++)
            {
                letters[j] = Convert.ToChar(textBox1.Text.Substring(j, 1));
            }

            for (int i = 0; i < len; i++)
            {

                bool result = IsDigit(letters[i].ToString());
                if (result == true)
                {
                    MessageBox.Show(letters[i]+"is a digit");
                }
            }


        }

if you need any clarification regarding above code please write to me......
Charith Liyanagamage17y ago
You are welcome dear.....
Neetu Goswami17y ago
Thank You, It is woking and there is no need for clarification. thanks