Windows Forms手动设置光标时出现错误提示音问题求助

Hey there! I totally get how annoying that random error beep can be when your code works functionally but makes that unwelcome noise. Let's fix this quickly.

Why the Beep Happens #

That beep usually pops up because when you press Enter in the TextBox, the system tries to handle the key press with its default behavior (like triggering a form's default button, or treating Enter as invalid input for a single-line TextBox). Even though you're switching focus to the DataGridView, the system still registers that the Enter key's default action wasn't properly handled, so it plays the error tone.

Solution 1: Suppress the Key Press in KeyDown Event #

Add this to your TextBox's KeyDown event handler. The key line here is e.SuppressKeyPress = true — it tells the system you've fully handled the Enter key, so it doesn't need to run any default actions (including playing the beep).

private void textBoxId_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Enter)
    {
        // Your existing logic to set focus to the DataGridView cell
        dataGridView1.CurrentCell = dataGridView1.Rows[yourTargetRowIndex].Cells[yourTargetColumnIndex];
        dataGridView1.Focus();
        
        // Stop the system from processing the Enter key further
        e.SuppressKeyPress = true;
    }
}

Solution 2: Mark the Event as Handled in KeyPress Event #

If you prefer using the KeyPress event instead, you can set e.Handled = true to achieve the same result:

private void textBoxId_KeyPress(object sender, KeyPressEventArgs e)
{
    if (e.KeyChar == (char)Keys.Enter)
    {
        // Your cursor positioning logic here
        dataGridView1.CurrentCell = dataGridView1.Rows[yourTargetRowIndex].Cells[yourTargetColumnIndex];
        dataGridView1.Focus();
        
        // Tell the system we've handled this key press
        e.Handled = true;
    }
}

Either of these should eliminate that pesky beep while keeping your cursor positioning functionality intact. Just make sure you're replacing yourTargetRowIndex and yourTargetColumnIndex with the actual row/column indices of your red-box cell.

内容的提问来源于stack exchange，提问作者Margarita Gonzalez