C# Discussion Boards - CodeProject

Change font inside a string

26-Jul-05 9:20

Hello,

I'm writing a little TabControl derivative to provide a SelectedIndexChanging event. I would like to add designer-support. I currently can create the object in the designer, but I have to implement a lot of code in the TabControlDesigner internal class (in System.Design.dll, see with .NET Reflector.)

Since it's basically a normal TabControl, I would like to avoid all the work and just use the same designer support, but the class is marked internal, so I can't specify it in the Designer attribute.

Is there a way (using reflection for example) to use this class as my designer?

[EDIT: Actually I don't need to derive from it. If I could specify it in the Designer attribute, it would be enough.]

Thanks,

-- LuisR

Luis Alonso Ramos
Intelectix - Chihuahua, Mexico

Not much here: My CP Blog!

WetRivrRat26-Jul-05 8:32

26-Jul-05 8:32

Hey, i need to BOLD some words inside a string that is part of a smtpmail body.

Here is my string:

string Message_body1="User password reset " +usename +"\r\n \r\n \r\n Login information for this user has been reset. \r\n \r\n login id:" +UserName ;

I want to bold "login id:"

Dim Beautiful As String
Beautiful = "ignorant"
Label1.Text = "The world is full of " & Beautiful & " people."

Why is common sense such an un-common comodity?

Luis Alonso Ramos26-Jul-05 8:36

26-Jul-05 8:36

In a plain-text email, you can't. If it's an HTML email, just use the appropiate tags.

-- LuisR

Luis Alonso Ramos
Intelectix - Chihuahua, Mexico

Not much here: My CP Blog!

WetRivrRat26-Jul-05 8:37

26-Jul-05 8:37

yah, plain text.... Mad | :mad:

thanks

Dim Beautiful As String
Beautiful = "ignorant"
Label1.Text = "The world is full of " & Beautiful & " people."

Why is common sense such an un-common comodity?

Dario Solera26-Jul-05 8:38

Dario Solera

26-Jul-05 8:38

You have simply to set the message type to html (MailMessage.BodyFormat = MailFormat.Html), then use html tags. To bold a word, just write: <b>your word</b>.

WetRivrRat26-Jul-05 8:41

26-Jul-05 8:41

yah, but can i do that from a win form? not working on a web form

Dim Beautiful As String
Beautiful = "ignorant"
Label1.Text = "The world is full of " & Beautiful & " people."

Why is common sense such an un-common comodity?

Dario Solera26-Jul-05 8:49

Dario Solera

26-Jul-05 8:49

if you use a RichTextBox instead of a Label or TextBox, yes.

if the word you have to bold starts at position 12 (char 12) and it is long 10 chars, do that:

int oldPos = richTextBox1.SelectionStart;

richTextBox1.SelectionStart = 12;
richTextBox1.SelectionLength = 10;
richTextBox1.SelectionFont = new Font(richTextBox1.SelectionFont, FontStyle.Bold);

richTextBox1.SelectionStart = oldPos;
richTextBox1.SelectionLength = 0;
richTextBox1.ScrollToCaret();

Note that oldPos is used only for restoring the old position of the blinking cursor. do that only if you need it.

I don't know any other valid way in WinForms...

WetRivrRat26-Jul-05 8:55

IEnumerator for selecting only controls of a given type

26-Jul-05 8:55

well, sorry I didn't explain myself well... I'm using smtpMail from withing the code, no input from the user except the email address.
But none the less I was stuck in the mindset of a single line of code for the smtpmail method and forgot that if i was to declare everything with MailMessage that I could use it as MailFormat.Html, so I figgured it out.

Thanks for the memory jolt!
Roll eyes | :rolleyes:

Dim Beautiful As String
Beautiful = "ignorant"
Label1.Text = "The world is full of " & Beautiful & " people."

Why is common sense such an un-common comodity?

JakeHolt26-Jul-05 7:23

Re: IEnumerator for selecting only controls of a given type

26-Jul-05 7:23

I'm creating a page with a ton of chk boxes and instead of writing out a switch or if, if, if...
is there a way to loop through them using IEnumerator ien = Panel1.controls.getEnumerator() and process only controls of a given (Check Boxes) type? I can't seem to make it work.

Thank you in advance,

Jake Holt

Luis Alonso Ramos26-Jul-05 8:15

Re: IEnumerator for selecting only controls of a given type

26-Jul-05 8:15

Yes.

foreach(Control ctl in panel1.Controls)
{
    CheckBox chk = ctl as CheckBox;
    if(chk == null)
        continue;
 
    // Do whatever with the check box here
}

The as operator will make the cast if possible or return null. There's also is, but that would require two statements:

if(ctl is CheckBox)
{
    CheckBox chk = (CheckBox) ctl;
 
    ...
}

I hope this helps! Smile | :)

-- LuisR

Luis Alonso Ramos
Intelectix - Chihuahua, Mexico

Not much here: My CP Blog!

JakeHolt27-Jul-05 5:11

Re: IEnumerator for selecting only controls of a given type

27-Jul-05 5:11

Works perfectly, thank you

Jake

j

Luis Alonso Ramos27-Jul-05 5:26

Re: IEnumerator for selecting only controls of a given type

27-Jul-05 5:26

You're welcome, I'm glad I could help Smile | :)

-- LuisR

Luis Alonso Ramos
Intelectix - Chihuahua, Mexico

Not much here: My CP Blog!

JakeHolt27-Jul-05 6:27

Re: IEnumerator for selecting only controls of a given type

27-Jul-05 6:27

Ok, I was really suprised at how fast this was processing using the collection versus the way I was doing it before, so naturally I decided to chop out more lines of code and put all my panels inside another panel and went about processing only the panel controls (the panels that contained the check boxes). Oddly though it only seems to find/process the last panel of three. Any ideas what would cause this?

<br />
foreach(Control ctrl in mainPanel.Controls)<br />
{<br />
  Panel p = ctrl as Panel;<br />
  if(p == null) continue;<br />
  else<br />
  {<br />
      foreach(Control ctl in p.Controls)<br />
      {<br />
          CheckBox chk = ctl as CheckBox;<br />
	  if(chk == null) continue;<br />
	  else<br />
	  {<br />
            if(chk.Text == "Check All" || chk.Text == "Uncheck All") continue;<br />
else<br />
{<br />
	     if(chk.Checked)<br />
	     {<br />
	        sql += " " + chk.Text + "=1,";<br />
	     }<br />
	     else<br />
             {<br />
		sql += " " + chk.Text + "=0,";<br />
	     }<br />
}<br />
          }<br />
   }<br />
}<br />
}

Thanks again, Jake

Luis Alonso Ramos27-Jul-05 6:50

Re: IEnumerator for selecting only controls of a given type

27-Jul-05 6:50

Seeing that you want to reduce the number of lines, I reformatted your code:

foreach(Control ctrl in mainPanel.Controls)
{
    Panel p = ctrl as Panel;
    if(p == null)
        continue;
 
    foreach(Control ctl in p.Controls)
    {
        CheckBox chk = ctl as CheckBox;
        if(chk == null)
            continue;
 
        if(chk.Text == "Check All" || chk.Text == "Uncheck All")
            continue;
 
        if(chk.Checked)
        {
            sql += " " + chk.Text + "=1,";
        }
        else
        {
            sql += " " + chk.Text + "=0,";
        }
    }
}

Basically, continue continues the cycle, so you don't need to do the else (and the extra braces and indenting.)

You're code looks fine. Have you stepped through it in the debugger? See what mainPanel.Control contains. Maybe your two other panels are siblings to mainPanel, or grandchildren of mainPanel.

-- LuisR

Luis Alonso Ramos
Intelectix - Chihuahua, Mexico

Not much here: My CP Blog!

JakeHolt27-Jul-05 7:03

Re: IEnumerator for selecting only controls of a given type

27-Jul-05 7:03

Ah thats it, the two that weren't processing were inside another panel. To many panels within panels. I have never been able to get the debugger to work with ASP pages =P.

Thank you again,

Jake

FYI: 264 lines of code compressed into 24.. amazing what you can do when you know what you're doing...

Luis Alonso Ramos27-Jul-05 7:22

27-Jul-05 7:22

You're welcome, I'm glad I could help!

JakeHolt wrote:
FYI: 264 lines of code compressed into 24.. amazing what you can do when you know what you're doing...

It has happened to me also. You spend a full day fighting something, and you make it work. Then, a few days later you find out that you have done all of it in 5 minutes with 10 lines of code. Smile | :)

That's the beauty of it!

-- LuisR

Luis Alonso Ramos
Intelectix - Chihuahua, Mexico

Not much here: My CP Blog!

TabControl

zaboboa26-Jul-05 6:39

zaboboa

26-Jul-05 6:39

Hello,

When I am switching tabs, how can I prevent the user from switching the tab unless all the textboxes on the current tab are filled in?
Is there a way of telling the index of the currently opened tab?

Thank you

Alomgir Miah26-Jul-05 7:08

Alomgir Miah

26-Jul-05 7:08

Handle this in the SelectedIndexChanged event of the TabControl.

Live Life King Size
Alomgir Miah

zaboboa26-Jul-05 7:22

zaboboa

26-Jul-05 7:22

How can I tell in what index Tab I was, and the current index Tab I am in now.

Thank you

Alomgir Miah26-Jul-05 7:31

Alomgir Miah

26-Jul-05 7:31

Actually there is no such thing, you will have to maintain a variable yourself called previousIndex. Everytime the index changes set it. So in the next index change you can use it.

Hope this helps.

Live Life King Size
Alomgir Miah