Copying user input from one textbox to another. C#

Question

4.00/5 (1 vote)

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I'm a newbie at this so bare with me. Trying this in VS 2k8 WPF

I'm trying to copy the user's input string from one text box to another. Below works fine when I do this:

C#

private void buttonChange_Click(object sender, RoutedEventArgs e)
 {


     string userInput = boxTop.Text;
     boxBottom.Text = userInput;


 }

Below doesn't work. I'm missing something very basic and would like some help understanding this.

C#

private void buttonChange_Click(object sender, RoutedEventArgs e)
  {

      string userInput = boxTop.Text;
      string userOutput = boxBottom.Text;
      userOutput = userInput;



  }

Posted 11-Jul-13 9:34am

PR3

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Comments

[no name] 11-Jul-13 15:41pm

In the second snippet you are setting two string variables equal to each other, not setting anything in textbox text.

[no name] 11-Jul-13 16:02pm

An easier way to do this is to simply
boxBottom.Text = boxTop.Text;

PR3 11-Jul-13 16:06pm

I originally was trying to do an "If" statement and basically didn't get no error, warning, etc.

This was within the buttonChange_Click that didn't work.
string userOutput = boxBottom.Text;
if (boxTop.Text == "42")
{
userOutput = "Good.";
}
else
{
userOutput = "Bad.";
}

[no name] 11-Jul-13 16:13pm

Yes and all you are doing is setting userOutput to be some value. You are not setting the textbox text to anything. You would need to boxBottom.Text = userOutput at some point.

PR3 11-Jul-13 16:26pm

That was it. Thank you very much. Something very simple I was missing.

Member 12684268 23-Aug-16 6:51am

ff

MuhammadUSman1 11-Jul-13 16:05pm

Your didn't set value to any text box.
if you want to save values in String Variables and also want to exchange values.
then check my solution.

PR3 11-Jul-13 16:28pm

Thanks.

1 solution

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MuhammadUSman1 · Accepted Answer · 2013-07-11T10:06:00

Solution 1

C#

private void buttonChange_Click(object sender, RoutedEventArgs e)
       {

           string userInput = boxTop.Text;
           string userOutput = boxBottom.Text;
           // Values saved in variables know you can change as you have done in first step.
           boxTop.Text = userOutput;
           boxBottom.Text = userInput;

       }

Posted 11-Jul-13 10:06am

MuhammadUSman1

Comments

Member 11536930 16-Apr-15 15:39pm

why is VS telling me that the type or namespace of 'RoutedEventArgs' could not be found??

MuhammadUSman1 20-Apr-15 1:09am

You should google it. It'll save our time.
https://www.google.com/search?q=type+or+namespace+of+%27RoutedEventArgs%27+could+not+be+found&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-beta&channel=sb