Can you create switch statements for changing text boxes?

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Hi
I am trying to create a program that when the OK button is clicked will move onto the next text box. I thought I could do this using if statements and the first if statement worked however, when adding the second and third if statements the solution fell apart.

What I need is a way to emulate "break;" in a switch statement or better yet convert my "if's" into "switches". I have attempted to do so, but I don't know what variable I should be putting in the switch bracket since "Textbox" is a type and so not valid in the context I require.

If anyone has any ideas on how I could correct this or work around it I would be grateful for any help you could offer.

Thank you.

What I have tried:

current code:

private void btn_OK_Click(object sender, EventArgs e)
        {
            if (txt_Hours.Enabled == true)
            {
                txt_Hours.Enabled = false;
                txt_Minutes.Enabled = true;
                txt_Seconds.Enabled = false;
            } 
                                   
            if (txt_Minutes.Enabled == true)
            {
                txt_Hours.Enabled = false;
                txt_Minutes.Enabled = false;
                txt_Seconds.Enabled = true;
            }

            if (txt_Seconds.Enabled == true)
            {
                txt_Hours.Enabled = false;
                txt_Minutes.Enabled = false;
                txt_Seconds.Enabled = false;
            }

attempted code:

private void btn_OK_Click(object sender, EventArgs e)
        {
            switch (TextBox)
            {
                case txt_Hours.Enabled == true:
                    txt_Hours.Enabled = false;
                    txt_Minutes.Enabled = true;
                    txt_Seconds.Enabled = false;
                    break;

                case txt_Minutes.Enabled = true:
                    txt_Hours.Enabled = false;
                    txt_Minutes.Enabled = false;
                    txt_Seconds.Enabled = true;
                    break;

                case txt_Seconds.Enabled = true:
                    txt_Hours.Enabled = false;
                    txt_Minutes.Enabled = false;
                    txt_Seconds.Enabled = false;
                    break;
            }

Posted 17-Apr-17 2:42am

Member 13130599

Updated 17-Apr-17 3:00am

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Comments

Richard MacCutchan 17-Apr-17 9:07am

Why are you messing around with multiple text boxes? Use a single box for the complete time, or better still use a standard control: How to: Display Time with the DateTimePicker Control[^].

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OriginalGriff · Accepted Answer · 2017-04-17T03:00:00

Start by thinking about what you want to do. This won't work:

C#

if (txt_Hours.Enabled == true)
            {
                txt_Hours.Enabled = false;
                txt_Minutes.Enabled = true;
                txt_Seconds.Enabled = false;
            } 
            if (txt_Minutes.Enabled == true)
            {
                txt_Hours.Enabled = false;
                txt_Minutes.Enabled = false;
                txt_Seconds.Enabled = true;
            }
            if (txt_Seconds.Enabled == true)
            {
                txt_Hours.Enabled = false;
                txt_Minutes.Enabled = false;
                txt_Seconds.Enabled = false;
            }

Because if the first case passes, it sets a condition which makes the second case pass (by enabling txt_Minutes), which sets a condition which makes the third case pass - so regardless of which condition it start in, it always ends up teh same: All disabled.

You can do it, with else conditions:

C#

if (txt_Hours.Enabled == true)
{
    txt_Hours.Enabled = false;
    txt_Minutes.Enabled = true;
    txt_Seconds.Enabled = false;
}
else if (txt_Minutes.Enabled == true)
{
    txt_Hours.Enabled = false;
    txt_Minutes.Enabled = false;
    txt_Seconds.Enabled = true;
}
else if (txt_Seconds.Enabled == true)
{
    txt_Hours.Enabled = false;
    txt_Minutes.Enabled = false;
    txt_Seconds.Enabled = false;
}
else
{
    // Dunno what you want to do here...
}

But you can't do that easily with a switch because switch expressions only ever work with sbyte, byte, short, ushort, int, uint, long, ulong, char, string, or enum values, and case statements only work with constant values.