CODEWITHSUNDEEP
c#wpfkeypresskeyboard-events
jeevan_jk
jeevan_jk

Reputation: 121

Restrict keypress in wpf textbox

I have TextBox in WPF where i need to fill the box only by pasting (ctrl +v) not by typing. So i need to restrict entire key press except ctrl+v. Since WPF is not having keypress event i am facing the problem to restrict the keypress

Upvotes: 0

Views: 3027

Answers (5)

jeevan_jk
jeevan_jk

Reputation: 121

<TextBox IsReadOnly="True" Name="Policy_text">
   <TextBox.CommandBindings>
       <CommandBinding Command="ApplicationCommands.Paste" CanExecute="PasteCommand_CanExecute" Executed="PasteCommand_Executed" />
   </TextBox.CommandBindings>
</Textbox>

and in code behind

private void PasteCommand_CanExecute(object sender, CanExecuteRoutedEventArgs e)
    {
        e.CanExecute = Clipboard.ContainsText();
    }

private void PasteCommand_Executed(object sender, ExecutedRoutedEventArgs e)
    {
        Policy_text.Paste();
    }

Upvotes: 0

Wouter
Wouter

Reputation: 2938

Do it WPF style and use ApplicationCommands.Paste and make the textbox readonly.

Upvotes: 2

Hooplator15
Hooplator15

Reputation: 1550

So try this:

 myTextBox.KeyDown += new KeyEventHandler(myTextBox_KeyDown);

 private void myTextBox_KeyDown(object sender, KeyEventArgs e)
 {
      if (e.KeyCode == Keys.V && e.Modifiers == Keys.Control)
      {
            input = myTextBox.Text;
      }
      else
      {
            input = "";
      }

  }

Upvotes: 0

Nikita Shrivastava
Nikita Shrivastava

Reputation: 3018

you can add this Key_Down handler to the textBox: 

  private void textBox1_KeyDown(object sender, KeyEventArgs e)
   {
      if (e.Modifiers == Keys.Control && e.Key==Key.V)
       {
         //Logic here
       }
      else
        e.handled=true;
   }

Upvotes: 1

Tim Bee
Tim Bee

Reputation: 2230

Provided you don't allow Right Click + Paste, but only Ctrl + V, I would simply check for the Ctrl key modifier being pressed and prevent everything else.

Upvotes: 0

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