Detect last charecter & Do something

Question

I want to that.....

if my textbox focus is lost then

a "," (Comma) should be entered

tb.Leave += delegate(object s, EventArgs ev)
                                {
                                   tb.Text = tb.Text.Trim() + ",";
                                };

this working fine (Output = My Sample Text,)

if this text box focus is lost again (when text has been entered alraddy[My Sample Text,]) then output = My Sample Text,,

so i decide to set a condition like this.... But no luck........

if my text box has "," (Comma) as last charecter then should not enter ", " again

my code is......

tb.Leave += delegate(object s, EventArgs ev)
                                {
                                    if (tb.Text.LastIndexOf(tb.Text) != ",")
                                    {
                                        tb.Text = tb.Text.Trim() + ",";
                                    }
                                    else
                                    {
                                        tb.Text = tb.Text.Trim();
                                    }
                                };

what is wrong with me here?

please help.

i am using DOT NET frame work 2.0

see error

http://img838.imageshack.us/img838/1843/errorzc.jpg

Answer 1

Last index of returns an int.

You can use tb.Text.EndWith(",")

http://msdn.microsoft.com/it-it/library/system.string.endswith(v=vs.80).aspx

---

Regards,
Bubu
http://zsvipullo.blogspot.it

Answer 2

If you want to get the last char of the string:

tb.Text.Substring(tb.Text.Length -1)

or

tb.Text[tb.Text.Lenght -1]

Answer 3

Hi,

You already have the code you need; you just need to modify it a tiny little bit.

tb.Leave += delegate(object s, EventArgs ev)
{
if(tb.Text.EndsWith(',') 
    {
    tb.Text = tb.Text.Trim();
    }
else
    {
     tb.Text = tb.Trim() + "," + " "; // Not sure why you are adding a space when you are using Trim() :P
    }
}

That's all you need.

Dave

---

Digital Forensic Software Developer
CCS LABS Digital Forensic Software
Mark as Answer or Vote up if useful thank you!

Answer 4

private void button1_Click(object sender, EventArgs e)
        {
            string LastChar = string.Empty;
            LastChar = textBox1.Text;
            LastChar = LastChar.Substring(LastChar.Length-1,1);
            MessageBox.Show("The Last Character is " + LastChar);
        }

This will detect the last character is textbox, and its up to you what you want to do with last character