C＃winform清除鼠标事件arg

Question

// Is it possible to create 1 mouse even for 2 text box?

Lets say i have 2 text boxes, (TxtBox1, TxtBox2)

what i want is 1 Clear function that will clear only the text button which was clicked, without the need to create 2 clear functions for each one : TxtBox1.Clear(); TxtBox1.Clear();

Here is another explanation of what i thought C# would support :

    private void Clear(object sender, MouseEventArgs e)
    {
        this.Clear();
              }

Answer 1

The sender is the UI element that was clicked so the following should work:

private void TextBoxOnClick(object sender, MouseEventArgs e)
{
    var theTextBox = sender as TextBox;
    if (theTextBox != null)
    {
        theTextBox.Text = string.Empty;
    }
}

The as and check for null is just defensive programming. If you're sure that this will only ever be called from a TextBox then you can do a direct cast.

Then you need to add this to the click event handler for each text box:

TxtBox1.OnClick += TextBoxOnClick;
TxtBox2.OnClick += TextBoxOnClick;

etc. for all your text boxes.