CODEWITHSUNDEEP
c#winformsvisual-studioinput
Matthew
Matthew

Reputation: 19

How to check if key is pressed in a text box Windows Form

I'm using Visual Studio C# and trying to check if the ENTER key has been pressed while in a text box

private void PasswordTextBox_TextChanged(object sender, EventArgs e)
{
    if(keyenterhasbeenpressed) //I dont know what to put here
    {
        MessageBox.Show("You pressed the enter key");
    }
}

So when someone clicks enter in that text box it will do something.

Upvotes: 0

Views: 5867

Answers (2)

SteelSoul
SteelSoul

Reputation: 141

The TextChanged event isn't really suited for checking for keypresses. It's best used to examine the sender object which is the textbox itself.

To check for the ENTER key you can do the following:

private void PasswordTextBox_KeyDown(object sender, EventArgs e)    
{
    if(e.KeyCode == Keys.Enter) 
    {
        MessageBox.Show("You pressed the enter key");
    }
}

or

private void PasswordTextBox_KeyPress(object sender, EventArgs e)        
{        
    if(e.KeyChar == 13) 
    {
        MessageBox.Show("You pressed the enter key");
    }
}

It depends on what event best suits your needs. You can always put a break point (assuming visual studio) and check what data is available to you in the eventargs and sender object

Upvotes: 1

Waseem Ahmad Naeem
Waseem Ahmad Naeem

Reputation: 890

Inorder to link the function with the key press event of the textbox add the following code in the designer.cs of the form

this.textbox1.KeyDown += new System.Windows.Forms.KeyEventHandler(this.OnKeyDownHandler);

Now define the function 'OnKeyDownHandler' in the cs file of the same form

private void OnKeyDownHandler(object sender, KeyEventArgs e)
 {

       if (e.KeyCode == Keys.Enter)
       {
       //enter key has been pressed
       // add your code
       }

}

Upvotes: 0

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