Can you explain this code below?

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3.00/5 (2 votes)

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Dear all,

I do not understand the code below. Would you like to explain me about it?
Here is the code:

private void txtFirstName_Enter(object sender, EventArgs e)
        {
            TextBox txt = (TextBox)sender;
            string t = txt.Name.Substring(3, txt.Name.Length - 3);
            if (txt.Text.ToLower() == t.ToLower())
            {
                txt.ForeColor = System.Drawing.Color.Black;
                txt.Text = "";
            }
        }

        private void txtFirstName_leave(object sender, EventArgs e)
        {
            TextBox txt = (TextBox)sender;
            string t = txt.Name.Substring(3, txt.Name.Length - 3);
            if (txt.Text.ToLower() == t.ToLower() || txt.Text == "")
            {
                txt.ForeColor = System.Drawing.Color.Silver;
                txt.Text = t;

            }
            else
            {
                txt.ForeColor = System.Drawing.Color.Black;
            }
        }

Thank you so much.

Posted 16-Jan-12 15:02pm

phanny 2011

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Comments

Suraj S Koneri 16-Jan-12 21:36pm

you didnot code this?

phanny 2011 16-Jan-12 21:37pm

what do you mean?

AspDotNetDev 16-Jan-12 21:37pm

There's a lot that could be explained. What specifically don't you understand about the code?

phanny 2011 16-Jan-12 21:39pm

The line
string t = txt.Name.Substring(3, txt.Name.Length - 3);
I don't understand.
Thanks

AspDotNetDev 16-Jan-12 21:57pm

Is this homework you have been assigned? If that line isn't obvious to you, I suggest you either figure out how to use the debugger or figure out how to show a message using MessageBox.Show. Google will be your friend for either of those tasks.

Sergey Alexandrovich Kryukov 16-Jan-12 23:17pm

That's right, not clear what do you mean by "explain". This is not a valid request. There cannot be anything like explanation without understanding what is your background, what exactly is not clear. (Not what line is not clear! What is not clear in the line?)

Generally, this is not a right kind of question. Why explaining just the code at all? If you cannot read and understand it, it means you need to learn computer language, programming, technology, not the code that someone has written. It is not helpful.
--SA

phanny 2011 17-Jan-12 2:33am

Yes I know. I am studying C# programming now. Just starting, so not clear about some code that I haven't seen. I am not good that why I need help.

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Not Active · Answer 1 · 2012-01-16T15:59:00

Solution 1

string t = txt.Name.Substring(3, txt.Name.Length - 3);

Not difficult to understand if you read the documentation
http://msdn.microsoft.com/en-us/library/aka44szs.aspx[^]

Posted 16-Jan-12 15:59pm

Not Active