How to verify PAN card?

Question

How to check the validation of edittext for pan card like \"ABCDE1234F\". I am confused how to check the the validation for this. Please help me guys. I will appreciate any kind

Answer 1

You can use Key press Event for PAN Card Validation in C#

enter code here

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)

    {           
        int sLength = textBox1.SelectionStart;  

        switch (sLength)
        {
            case 0:

            case 1:

            case 2:

            case 3:

            case 4:

                    if (char.IsLetter(e.KeyChar) || Char.IsControl(e.KeyChar))
                    {
                        e.Handled = false;
                    }
                    else
                    {
                        e.Handled = true;
                    }
                    break;

            case 5:

            case 6:

            case 7:

            case 8:
                    if (char.IsNumber(e.KeyChar) || Char.IsControl(e.KeyChar))
                    {
                        e.Handled = false;
                    }
                    else
                    {
                        e.Handled = true;
                    }
                    break;
            case 9:
                    if (char.IsLetter(e.KeyChar) || Char.IsControl(e.KeyChar))
                    {
                        e.Handled = false;
                    }
                    else
                    {
                        if (Char.IsControl(e.KeyChar))
                        {
                            e.Handled = false;
                        }

                        else
                        {
                            e.Handled = true;
                        }
                    }
                    break;
            default:
                    if (Char.IsControl(e.KeyChar))
                    {
                        e.Handled = false;
                    }

                    else
                    {
                        e.Handled = true;
                    }
                    break;
        }
    }