Text Box Selection - C# Discussion Boards

Re: How to make form as a model Window???

31-Jan-08 4:53

Do you mean modal? Use .Show() or .ShowDialog() depending on your needs.

Sounds like somebody's got a case of the Mondays

-Jeff

Neo Andreson31-Jan-08 17:46

Neo Andreson

31-Jan-08 17:46

ThanXXXX a lot!!!!

Truth Is The Simplest !!!!

Text Box Selection

StyleGuide31-Jan-08 3:36

31-Jan-08 3:36

Hi there,

Does anybody know how I can select the entire contents of a text box from the end to the start? (thus allowing the start to be displayed in the text box, if the text is too long to fit).

Below is (obviously) selecting from left to right:

this.txtName.SelectionStart = 0;<br />
this.txtName.SelectionLength = txtName.Text.Length;

so I need something like:

this.txtName.SelectionStart  = txtName.Text.Length;<br />
this.txtName.SelectionEnd = 0;

but Text Box has no SelectionEnd Property...

Thanks!

CKnig31-Jan-08 3:46

CKnig

31-Jan-08 3:46

I didn't test it but try something like

<br />
<br />
// this should select all<br />
this.txtName.SelectAll();<br />
// this should set the caret to pos 0<br />
this.txtName.SelectionStart = 0;<br />
// and this should scroll:<br />
this.txtName.ScrollToCaret();<br />

I know this kind of problems (ever tried implementing syntaxhighlighting in a richttextbox ... well you wouldn't want to use the Selects! you will end using the RTF-code itself ... argh) - so I feel you pain Wink | ;)

StyleGuide31-Jan-08 4:37

31-Jan-08 4:37

Thanks for this CKnig, but no joy Frown | :-(

Skippums31-Jan-08 4:52

31-Jan-08 4:52

I cannot reproduce your problem. Specifically, calling this.txtName.SelectAll() outside of the constructor retains the current position of the text within the TextBox. This means that if you are scrolled to the start, then call .SelectAll(), you will still be at the start after the call. If this is not the case for you, please be more specific. If you are scrolling the text or selecting all of it in the constructor for your form, then move that code into the OnShown event for the Form. Good luck,

Sounds like somebody's got a case of the Mondays

-Jeff

StyleGuide31-Jan-08 22:47

31-Jan-08 22:47

Thanks Jeff,

this.txtName.SelectionStart = 0;

Correctly sets the cursor position to 0, but when I add:

this.txtName.ScrollToCaret();<br />
this.txtName.SelectAll();

All text inside the textbox is selected, but the cursor position is now at the end of the selection..

Any ideas? Thanks.

Skippums1-Feb-08 0:11

1-Feb-08 0:11

Where in your code are you calling .SelectAll()? Are you calling it prior to the object being displayed? If so, then that is your problem. The GUI state of the textbox stores info about things like where to scroll. On my own computer running VS 2005 with .Net v2.0, I don't see this error at all, unless I make the .SelectAll() call from one of the following locations:

1. Within the constructor of any object that is initially loaded by the form
2. Within the Load() event of any object that is initially loaded by the form
3. Anytime the textbox is not visible

If this still does not answer your question, then in your next post give me the stack trace from which you are calling the .SelectAll() method. Good luck,

Sounds like somebody's got a case of the Mondays

-Jeff

StyleGuide1-Feb-08 4:29

1-Feb-08 4:29

hmmmm.. Thanks Jeff,

I'm calling it in the Enter event of the text box..

Skippums1-Feb-08 5:31

1-Feb-08 5:31

hmmm. I missed that one, but mine did finally do the same thing you described. I got it to work how you requested by doing the following:

textBox1_Enter(object sender, EventArgs e) {
    textBox1.Select(textBox1.TextLength, -textBox1.TextLength);
}

Hope this helps!

Sounds like somebody's got a case of the Mondays

-Jeff

StyleGuide4-Feb-08 5:56

program disables the application

4-Feb-08 5:56

Great! Thanks Jeff

Saamir31-Jan-08 3:28

Saamir

31-Jan-08 3:28

Hi guys,
I need your help. I am not a pro in C# and have stalled with a problem. My application does a bunch of things in the following function and this function is called when a button is clicked. upon clicking and upon execution of these functions my application background stalls/turns white due to I believe memory overloading. Please advice on what I could do to avoid that, I tried using application.doevents() but that causes then my MDI screen to go white Smile | :)

Please advice....

public bool ProcessMain(string []psfile,out string sErrMessage)
{
bool rt=true;
string ErrMessage=string.Empty;
sErrMessage=string.Empty;
try
{
rt=CleanBox(out ErrMessage);
if(rt)
{
rt=ParseFile(psfile,out ErrMessage);
if(rt)
{
rt=ProcessBatch(out ErrMessage);
if(rt)
{
rt=ProcessErrors(out ErrMessage);
if(rt)
{

Sameer

Justin Perez31-Jan-08 3:51

Justin Perez

31-Jan-08 3:51

Create a worker thread and run the method from there.

I'm going to become rich when I create a device that allows me to punch people in the face over the internet.

"If an Indian asked a programming question in the forest, would it still be urgent?" - John Simmons / outlaw programmer

Saamir31-Jan-08 4:07

Saamir

31-Jan-08 4:07

Thank you Justin,
Unfortunately I am clueless about threads, i researched google but can't figure out exactly on how to implement it with my code. Please advice

Sameer

Justin Perez31-Jan-08 4:15

Justin Perez

31-Jan-08 4:15

This article[^] is pretty simple, and straight forward. It has some sample code, with comments. It should be pretty easy to figure out, and then implement for your own needs. Good luck Smile | :)