How to detect tab key pressing in C#?

问题

I want to detect when tab key is pressed in a textBox and focus the next textbox in the panel.

I have tried out keyPressed method and keyDown method. But when I run the program and debug those methods are not calling when the tab key is pressed. Here is my code.

private void textBoxName_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Tab)
    {
        textBoxUsername.Focus();
    }
}

private void textBoxName_KeyPress(object sender, KeyPressEventArgs e)
{
    if (e.KeyChar==(char)Keys.Tab)
    {
        textBoxUsername.Focus();
    }
}

Please correct me.Thank you.

回答1:

go to the properties of text box and assign correct order of tabindex

回答2:

Why do you need that complication at all? WinForms does it for you automatically. You just need to set the correct tab order.

回答3:

You should use tabOrder instead.

回答4:

You want the "leave" event. I just threw this into the default C# WinForms application:

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        /* 
              ... misc housekeeping ... 
        */

        private void OnLeave(object sender, EventArgs e)
        {
            lblMsg.Text = "left field 1";
        }

        private void OnLeave2(object sender, EventArgs e)
        {
            lblMsg.Text = "left field 2";
        }
    }
}

It works as you would expect. Obviously you can do anything you want in the Leave() handler, including forcing the focus elsewhere, but be careful not to confuse the user...

回答5:

You can try overriding the ProcessCmdKey method like this

回答6:

If textBoxName has a focus while pressing the TAB Key , then only the "KeyDown" event triggers. You just need to set the correct tab order.

回答7:

If you are dealing with the text boxes inside a Panel, setting the correct tab index should do the job perfectly. But, if you are dealing with other text box from other Panel say:

panel1 has textbox1

panel2 has textbox2

panel3 has textbox3

Here's what you need to do:

Set the TabStop = False property of all the textboxes. By default, this is set to True.
Set the correct TabIndex for each panel, e.g.

panel1 TabIndex = 0; panel2 TabIndex = 1; panel3 TabIndex = 2;
Then try this code

private void textBox1_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode.Equals(Keys.Tab)) this.textBox3.Focus(); }

来源：https://stackoverflow.com/questions/2954911/how-to-detect-tab-key-pressing-in-c

标签

tabs

key

keypress