Setting Label Text to null IF Text Box . Text = Empty.

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I am new to C#. I made a program and I am having trouble with Text Box an Label.
Here Is My Code:

C#

if (string.IsNullOrWhiteSpace(TextBox1.Text))
            {
                Label1.Text = null;
            }

But When I execute it Nothing Happens!
I even tried string.empty etc...

Posted 3-Dec-11 5:17am

User 8419810

Updated 3-Dec-11 7:17am

theanil

v2

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Comments

Ed Nutting 3-Dec-11 11:49am

What are you expecting to happen? The text box will display blank if text is blank or nul.. I'm not even sure you can set the text property to null anyway... Why do you want to? Just use string.IsNullOrEmpty or string.IsNullOrWhiteSpace.

LanFanNinja 3-Dec-11 13:48pm

Please explain what it is you are wanting to do exactly. I am sure there is a better solution for you than this.

3 solutions

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Mehdi Gholam · Answer 1 · 2011-12-03T07:20:00

Solution 1

Text boxes are usually not null, so you must check for empty string.

C#

if(TextBox1.Text == "")
    Label1.Text = "" ;

Posted 3-Dec-11 7:20am

Mehdi Gholam

Comments

Abhinav S 3-Dec-11 13:23pm

The OP already tried string.empty.

Wonde Tadesse 3-Dec-11 13:29pm

5+

Mehdi Gholam 3-Dec-11 14:27pm

Thanks

Eduard Lu · Answer 2 · 2011-12-03T14:22:00

Solution 3

how bout this?

C#

if(String.IsNullOrEmpty(TextBox1.Text))
{
   Label1.Text = string.Empty
}

Please mark as answer and vote 5 if this solved your problem

Best regards,
Eduard

Posted 3-Dec-11 14:22pm

Eduard Lu

**theanil** · Answer 3 · 2011-12-03T07:30:00

Solution 2

C#

private void textBox1_TextChanged(object sender, EventArgs e)
        {
            label1.Text = textBox1.Text;
        }

Posted 3-Dec-11 7:30am

theanil