“KeyPressEventArgs”不包含 KeyCode 错误的定义

Question

I'm trying to make a key press event in visual studio windows forms, but getting this error. Any ideas?

 private void Form1_KeyPress(object sender, KeyPressEventArgs e)
        {  
            if (e.KeyCode = Keys.E)
            {
              // The Code when key 'E' is pressed
            }

        }

I keep getting the error CS1061

Answer 1

Im trying to make a key press event in visual studio windows forms but getting this error:

The error CS1061

This error is because KeyPressEventArgs doesn't contain a definition for KeyCode , please see Microsoft documents for more details on this compiler error. If you want to get the KeyCode one way you can get it with a combination of KeyDown event and using KeyEventArgs .

On another note, in your provided code you have if (e.KeyCode = Keys.E) that line should give you an error of some sort along the lines of:

CS0200 Property or indexer ... cannot be assigned to -- it is read only

To fix this , you need to add two == so you can perform a equality check, not trying to assign.

Solution:

To fix your main issue, please see below the new signature you can use.

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
   if (e.KeyCode == Keys.E)
   {

   }
}

Answer 2

KeyPressEventArgs objects has only a definition for KeyChar, which type is char, if you want to easy compare that char with any value defined on Keys class you can rewrite that conditional like this:

if ((int)e.KeyChar == (int)Keys.E)
{
    // The Code when key 'E' is pressed
}

I hope it helps, and remember to use == in order to compare XD