How to remove the control? - C# Discussion Boards

Colin Angus Mackay19-Jul-07 3:35

Colin Angus Mackay

19-Jul-07 3:35

The Knowledge wrote:
Does c# uses it's own predefined keywords for input and output if yes plz let me know

Input/output to/from where?

Upcoming events:
* Glasgow: Mock Objects, SQL Server CLR Integration, Reporting Services, db4o, Dependency Injection with Spring ...

"I wouldn't say boo to a goose. I'm not a coward, I just realise that it would be largely pointless."

My website

Luc Pattyn19-Jul-07 4:11

19-Jul-07 4:11

no, the C# (or C or C++ or Java) language does not have special keywords for input/
output. They rely on classes to do your I/O. See for instance SerialPort, Graphics,
File (and all the stream stuff) etc.

Smile | :)

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

Colin Angus Mackay19-Jul-07 4:14

Colin Angus Mackay

19-Jul-07 4:14

Luc Pattyn wrote:
They rely on classes to do your I/O. See for instance SerialPort, Graphics,
File (and all the stream stuff) etc.

Aahh..... Was that what he meant? D'Oh! | :doh:

Luc Pattyn19-Jul-07 5:43

Re: changing system colors

19-Jul-07 5:43

Yes, I hope he was refering to such things as the good old IN and OUT statements in Basic
(and the corresponding assembly instructions available on several microprocessors).

Smile | :)

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

changing system colors

Bekjong19-Jul-07 3:16

Bekjong

19-Jul-07 3:16

Hi,

I'm writing an MDI application and want to change the default systemcolors assigned to my titlebars. Does anyone know of a way of doing this?

Thanks in advance!

Standards are great! Everybody should have one!

mark_w_19-Jul-07 5:24

mark_w_

19-Jul-07 5:24

have a read of this

http://www.codeproject.com/cs/miscctrl/exdotnet.asp[^]

Re: changing system colors

Bekjong19-Jul-07 5:36

Bekjong

19-Jul-07 5:36

Thanks for the reply, but the article only provides a panel and a progressbar. Although they're really nice, what I'm looking for is to change the colors in the title bar of my child windows: In Window's classic theme they're set to the colors defined in the selected theme (blue and lightblue by default).

Standards are great! Everybody should have one!

How to remove the control?

Dotnetkanna19-Jul-07 3:11

Dotnetkanna

19-Jul-07 3:11

Hi everybody,

I Had used the below code to adding the textbox contorl dynamically and nodes in the treeview but i have no idea to how to remove the created control by using the control name onbutton click and also i have to remove the corresponding nodes in the treeview.any suggestion?

int n = 25;
int m = 1;

private void BtnAddControl_Click(object sender, EventArgs e)
{
TextBox txtBox = new TextBox();
txtBox.Text = "TextBox" + m;
txtBox.TabIndex=m;
txtBox.Tag=m;
txtBox.Location = new System.Drawing.Point(10, n);
txtBox.Size = new System.Drawing.Size(70, 20);
txtBox.Name = "TextBox" + m;

txtBox.Click +=new EventHandler(txtBox_Click);
this.Controls.Add(txtBox);

TreeNode root = null;
if (TV.Nodes.Count == 0)
{
root = new TreeNode("TextBox");
root.Nodes.Add(txtBox.Name);
TV.Nodes.Add(root);
}
else
{
TV.Nodes[0].Nodes.Add(txtBox.Name);
}

TV.ExpandAll();
n = n + 20;
m++;
}

Regards

Kanna

Martin#19-Jul-07 3:19

19-Jul-07 3:19

Hello,

You have to iterate over the Controls Collection and compare the Name property

foreach(Control c in this.Controls)
{
    if(c.Name.Equals("TextBox"+m.ToString()))
    {
        this.Controls.Remove(c);
        break;
    }
}

All the best,

Martin

Luc Pattyn19-Jul-07 4:15

19-Jul-07 4:15

if c is the control to remove (maybe found as sender of some event), you should be
able to remove it most easily with c.Parent.Controls.Remove(c);

if you dont now c, you must iterate over it's parents controls to identify it, unless
you have setup a Hashtable/Dictionary to link the name to the Control...

Smile | :)

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

Martin#19-Jul-07 4:17

19-Jul-07 4:17

Luc Pattyn wrote:
if c is the control to remove (maybe found as sender of some event), you should be
able to remove it most easily with c.Parent.Controls.Remove(c);

if you dont now c, you must iterate over it's parents controls to identify it.

Was this info really for me?

All the best,

Martin

Luc Pattyn19-Jul-07 4:22

19-Jul-07 4:22

I should have replied to the original poster, my mistake, but the info is valid
for you as well. Laugh | :laugh:

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

Larantz19-Jul-07 11:55

Larantz

19-Jul-07 11:55

Hi Martin.
I don't have VS installed on this computer, so I haven't had the time to check, but doesn't adding and removing of elements in a collection that you're currently iterating over in a foreach, throw an exception?

Martin# wrote:
Hello,

You have to iterate over the Controls Collection and compare the Name property
foreach(Control c in this.Controls)
{
    if(c.Name.Equals("TextBox"+m.ToString()))
    {
        this.Controls.Remove(c);
        break;
    }
}

Best regards.
-Larantz-

for those about to code, we salute you
http://www.tellus-software.com

Martin#19-Jul-07 19:07

19-Jul-07 19:07

Hello,

That would be correct if you are searching for more than one control in the collection. Than you would have to add the Controls in a temporary List, like ArrayList, and remove it later while iterationg over that temp list.
In my example I was only searching for one control and stoped the foreach with a "break".
So I think this will run just fine!

But it was correct to inform about this issue, so thanks!

All the best,

Martin

Dotnetkanna19-Jul-07 19:47

Dotnetkanna

19-Jul-07 19:47

Hi Thanks,
Its Working fine..

Regards
Kanna..

Martin#19-Jul-07 19:48

19-Jul-07 19:48

You are wellcome!

All the best,

Martin

rating of images

APHerman19-Jul-07 3:03

APHerman

19-Jul-07 3:03

I want to be able to rate images with stars like in Photo Gallery and Photoshop. I can not find where the rating is stored (IPTC or EXIF or ...?) Is there anybody who has an example of setting and getting the rating?

Eduard Keilholz19-Jul-07 3:16

Eduard Keilholz

19-Jul-07 3:16

Sounds fancy... do you mean you'd like to store the rating within the image??

.: I love it when a plan comes together :.
http://www.zonderpunt.nl

APHerman19-Jul-07 3:22

APHerman

19-Jul-07 3:22

yep. Do you have PhotoGallery? When I use that to give a rating (0 - 5 stars) the size of the file changes. When I use a HexEditor, I see that the header is changed, but I do not like to mess around with headers and I'm pretty sure there is a better way.

Larantz19-Jul-07 11:58

Larantz

19-Jul-07 11:58

The values are stored in the header as you say. Some metadata added onto the picture information.
I've got an exif library that I got off the internet.
I'll see if I can find it. I belive it can write values as well as read them.

-Larantz-

-- Modified --
It's actually ExifExtractor from here on CodeProject.
http://www.codeproject.com/csharp/exifextractor.asp[^]

But as the name spells, 'Extractor', I'm not sure it can alter values.

-Larantz-

for those about to code, we salute you
http://www.tellus-software.com