Setting the focus

kemli zurdo

Hello,

I have two textboxes txt1 and txt2. I have set the maxlength of the txt1 to 5. When it reaches the maxlength it shifts the focus to txt2. The problem is on keypress event when I come back and make some corrections it shifts focus to the next textbox which I do not want to happen.

Eg: I have "BRAIN" in txt1 and when I come back and wanted it to change to BRIAN. it is not letting me to change the entire text instead when I press any key it shifts focus to the next textbox even when I select the text by mouse and keyboard. I want to make the necessary changes and when I reach the limit of maxlength I want the focus to be shifted. How to overcome this problem?

4 Replies

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Rajanikant Hawaldar2y ago
Use flag to achieve it,

Amit Mohanty2y ago

You can use txt1_KeyDown event prevents moving the focus to txt2 on keypress if the maximum length is already reached, except when the pressed key is the "Backspace" key (Keys.Back). For example:

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        txt1.MaxLength = 5;
    }

    private void txt1_TextChanged(object sender, EventArgs e)
    {
        if (txt1.Text.Length >= txt1.MaxLength)
        {
            txt2.Focus();
        }
    }

    private void txt1_KeyDown(object sender, KeyEventArgs e)
    {
        if (txt1.Text.Length >= txt1.MaxLength && e.KeyCode != Keys.Back)
        {
            e.SuppressKeyPress = true;
        }
    }
}

kemli zurdo2y ago
I can select the first character but when I press any key it shifts the focus to the next textbox.
Sam Hobbs2y ago
If txt1 has BRAIN then can you delete a character first and then add a character? If that works and you need something else to happen then you will need to write code to do what you need instead of using maxlength.