Question

I have a textbox.In that I have to allow the user to type some thing in that textbox and i also restrict the user not to select the typed text in that textbox.I have need not to allow the white space at the start of the text box and also i have need not allow the user to type more that 32 characters.Thsi is my code.

    private void txtApplication_Title_KeyPress(object sender, KeyPressEventArgs e)
    {
        txtApplication_Title.Text = txtApplication_Title.Text.Remove(txtApplication_Title.SelectionStart, txtApplication_Title.SelectionLength);
        if (txtApplication_Title.Text.Length== 0)
        {
            e.Handled = (e.KeyChar == (char)Keys.Space);


        }
        int count_charac = txtApplication_Title.Text.Length + 1 ;
        if (count_charac > 32)
        {
            lblApplication_name.Text = data_variables.RES_TXT_STRING_EXCEEDING_APPLICATION_NAME;


            timer1.Interval = 7000;

            timer1.Enabled = true;

            timer1.Tick += new System.EventHandler(OnTimerEvent_Application_name);

        }

    }
    public void OnTimerEvent_Application_name(object sender, EventArgs e)
    {

            lblApplication_name.Text = " ";


 timer1.Dispose();
    }

Here in this code.I am able to restrict the user to 32 characters.And i try to press space at the start it does not allow me.It allows the selection of text using Shift+Arrow key.
I do know how to block the selection.Another thing is suppose I try
Hello and I select Hell and pressing the space directly it starts allowing the space in the text box.Can any one help me.Thanks in advance

Answer 1

Instead of KeyPress event, maybe use the textchanged event.

Text box has a max length attribute. Also, just call TextBox.Text=TextBox.Text.TrimStart() will remove any whitespace at beginning