Question

How to selectall() in masked textbox?

Asked by: brettr

In winforms .NET 3.5, I have a masked textbox that takes up to two numbers.  When a user clicks into the box, the cursor goes to the last position, even if the box is empty.  So the user has to back space twice or click to the beginning of the textbox before any input is accepted.

I tried this:

 private void txtMytextbox_MouseEnter(object sender, EventArgs e)
        {
            txtMytextbox.SelectionStart = 0;
            txtMytextbox.SelectAll();
        }

txtMytextbox.SelectionStart = 0 was added after SelectAll() but neither have any affect.  What am I doing wrong?

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Asked On
2009-03-27 at 14:05:26ID24272676
Topics

C# Programming Language

,

.NET

Participating Experts
1
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Comments
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Answers

 

by: HalfAsleepPosted on 2009-03-27 at 14:50:07ID: 24005801

A textbox cursor cannot go 2 spaces to the left, if there is no text in there.  If you absolutely want to always "select" 2 chars, even when it is empty, I think you have to check for an empty text box and add 2 spaces or zeroes first, then select them.

 

by: HalfAsleepPosted on 2009-03-27 at 14:50:46ID: 24005808

I meant cannot go to the right, without any text in the box, but I guess you got that.

 

by: brettrPosted on 2009-03-27 at 15:17:15ID: 24005964

Ok, then why when you click into an empty masked textbox does the cursor sit at position 3?

 

by: brettrPosted on 2009-03-27 at 15:38:26ID: 24006084

This does it:

if (txtMytextbox.Text.Length > 0)
            {
                txtMytextbox.SelectAll();
            }
            else
            {
                txtMytextbox.Send("{HOME}");
            }

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