Re: WPF BitmapImage and transparency - C# Discussion Boards

mehrdadc4810-Sep-06 20:35

10-Sep-06 20:35

Hi,
Is there any way to convert a windows application to web applicatin.
i.e. I have a windows appliation, I want to run it in IE.
I have heard that using ActivX it is possible.

Best wishes

Re: Win To Web

Navi1510-Sep-06 20:41

Navi15

10-Sep-06 20:41

Check out this link

http://www.c-sharpcorner.com/UploadFile/asprabahar/1WindowsonWeb05302006023206AM/1WindowsonWeb.aspx?ArticleID=2f5df473-5b2d-4c6b-abc8-8a5ef7ef14c8

Navi

richtextbox control

Kumar290510-Sep-06 20:16

Kumar2905

10-Sep-06 20:16

Could any one tell me how to create richtextbox control with text inside.

Kumar Gaurav

Re: richtextbox control

Stefan Troschuetz10-Sep-06 21:28

Stefan Troschuetz

10-Sep-06 21:28

RichTextBox richTextBox1 = new RichTextBox();
richTextBox1.Text = "Text inside";

"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning." - Rick Cook

www.troschuetz.de

WPF BitmapImage and transparency

Steve Bickell10-Sep-06 20:05

Steve Bickell

10-Sep-06 20:05

Does anyone know how you select a pixel from a BitmapImage instance, say the one at 0.0, and set that as the transparent color for a bitmap.

Re: WPF BitmapImage and transparency

Arjun "Mjolnir" Bahree10-Sep-06 22:32

Arjun "Mjolnir" Bahree

10-Sep-06 22:32

Have a look at the Bitblt in Win32 APIs.
thats one way fo doing this, though through Interop in .NET

Excelsior
Arjun Bahree
"By The Might of Mjolnir"

I Came! I Coded! I Conquered!

Re: WPF BitmapImage and transparency

Steve Bickell11-Sep-06 10:50

Steve Bickell

11-Sep-06 10:50

Thanks for that.

With Windows Forms etc it was easy just

bitmap.MakeTransparent(bitmap.GetPixel(0, 0));

and I'm sure Bitblt would do it but I always try and avoid unmanaged code as it seems like such a backward step especially with WPF and XAML on the horizon.

Re: WPF BitmapImage and transparency

Arjun "Mjolnir" Bahree11-Sep-06 16:59

Arjun "Mjolnir" Bahree

11-Sep-06 16:59

Anytime Steve Smile | :)

Yes Bitmap class offers the transparency thing, but under the hoods its using the same API so i chose to put forward the native thing Big Grin | :-D

.

There are tons of benefits of blitting but then not all is offered through the GDI+ classes and the likes. MS is making life easier for us by putting better and more abstractions over the native ways....and that is really productive. However, knowing how my car runs can reduce my dependency on the mechanic Smile | :)

)

Excelsior
Arjun Bahree
"By The Might of Mjolnir"

I Came! I Coded! I Conquered!

Re: WPF BitmapImage and transparency

g00fyman10-Sep-06 22:59

g00fyman

10-Sep-06 22:59

try this[^]

hope that helps,

it did me

g00fy Big Grin | :-D

Re: WPF BitmapImage and transparency

Steve Bickell11-Sep-06 10:52

Steve Bickell

11-Sep-06 10:52

Wow.And to think I just used to write

bitmap.MakeTransparent(bitmap.GetPixel(0, 0));

Still, that's progress for you.

Thanks for the info, I'll give it a try.

Do we need to call dbCommand.Dispose() ?

s o v a n n10-Sep-06 19:05

s o v a n n

10-Sep-06 19:05

Hello !

I have a question about DB specifications :
Do we have to call IDbCommand.Dispose ?
What does IDbCommand.Dispose mean?
We have problem doing this :

<br />
IDbConnction pipe = new OleDbConnection(connString);<br />
IDbCommand command = pipe.CreateCommand();<br />
command.QueryString = "select ...";<br />
IDataReader reader = command.ExecuteReader();<br />
command.Dispose();<br />
reader.Close();<br />
pipe.Close();<br />

The problem get solved if we don't do IDbCommand.Dispose

Your comments would be very helpful. Thanks.
Sovann

Re: Do we need to call dbCommand.Dispose() ?

Navi1510-Sep-06 19:40

Navi15

10-Sep-06 19:40

You cannot Dispose Command Object after ExecuteReader Method, the datareader object maintains the connection to the database as it will not pull all data at once, and it will pull data record by record. So dispose the command object after getting all the data.

Naveen G
MCSD.Net

Re: Do we need to call dbCommand.Dispose() ?

s o v a n n10-Sep-06 20:44

s o v a n n

10-Sep-06 20:44

Thank you. Anyway, do we have to call IDbCommand.Dispose ?

Re: Do we need to call dbCommand.Dispose() ?

Stefan Troschuetz10-Sep-06 21:36

Stefan Troschuetz

10-Sep-06 21:36

Whenever a class exposes a Dispose method you should definitely call it as it frees resources immediatly. You can take advantage of the using statement that automatically calls Dispose on an object when execution leaves its scope. Simple example taken from MSDN.

using (Font font1 = new Font("Arial", 10.0f))
{
  //use font1 object
}

Re: Do we need to call dbCommand.Dispose() ?

s o v a n n10-Sep-06 22:25

s o v a n n

10-Sep-06 22:25

Thank you. Your comment has been very helpful Smile | :)

Trim away the last part of a string

Support12310-Sep-06 18:24

Support123

10-Sep-06 18:24

Hi all,

i just want to know how to trim away the last part of a string in a variable...
I have the following:

string strNum = "0821234567,0721234567,0831234567,"
string strNum2 = "";
if(strNum.EndsWith(","))
{
<How Do i trim the last character away? I just need to get rid of the "," at the end>
}

"Many of life's failures are people who did not realize how close they were to success when they gave up." Thomas A. Edison

Re: Trim away the last part of a string

Guffa10-Sep-06 18:37

Guffa

10-Sep-06 18:37

You create a new string from the part of the string that you want to keep:

strNum = strNum.SubString(0, strNum.Length - 1);

---
b { font-weight: normal; }

Re: Trim away the last part of a string

Support12310-Sep-06 18:55

Support123

10-Sep-06 18:55

Thank you for your time... Smile | :)

"Many of life's failures are people who did not realize how close they were to success when they gave up." Thomas A. Edison

Re: Trim away the last part of a string

lmoelleb10-Sep-06 20:43

lmoelleb

10-Sep-06 20:43

Hmm, you should consider using "Trim" or "TrimEnd" instead of "Substring" - after all, you want to - well - trim Smile | :)

It will save you the clumpsy "if" construction as well.

Re: Trim away the last part of a string

Support12310-Sep-06 22:36

Support123

10-Sep-06 22:36

Thank you, the first one worked. so after i checked if there is a "," at the end of the string it just leaves it out. but i'll use the trim end next time. Wink | ;)

thanks.

"Many of life's failures are people who did not realize how close they were to success when they gave up." Thomas A. Edison

Re: Trim away the last part of a string

Arjun "Mjolnir" Bahree10-Sep-06 22:46

Arjun "Mjolnir" Bahree

10-Sep-06 22:46

On another note, something faster, and optimized than substring or trimending
(think what shall happen calling substring on a very huge string?)

strNum[strNum.Length-1] = string.Empty;

There are few scenarios where this will be the best and others where this wont be a better idea.

Excelsior
Arjun Bahree
"By The Might of Mjolnir"

I Came! I Coded! I Conquered!

Re: Trim away the last part of a string

lmoelleb10-Sep-06 23:08

lmoelleb

10-Sep-06 23:08

Two problems with your code:

strNum[index] is a char. string.Empty is a string. You can't assign a string to a char.

Strings can't be changed. Hence strNum[index] is a read-only indexer.

So I do not see how this should work. Using a StringBuilder might help if the strings are repeatedly modified, but for a single trim operation it would not make any sense.

MDI Forms

Steve_c#freak10-Sep-06 18:03

Steve_c#freak

10-Sep-06 18:03

I'm try to write my own picture viewer using the MDI format.
Have the basic setup done.
Need help on how to load a picture/image into the active ChildMDI form.
Do you load the picture/image into a picturebox or something else.

Thanks,

Steve C#freak Big Grin | :-D

Re: MDI Forms

Ranjan Banerji11-Sep-06 18:13

Ranjan Banerji

11-Sep-06 18:13

Easiest way is to load it into a pictureBox. You can do something like:

Image image = Image.FromFile( "c:\\blah.jpg" );
pictureBox.Image = image;

My pointless rants
http://meragussa.blogspot.com

Re: MDI Forms

Steve_c#freak12-Sep-06 13:33

Steve_c#freak

12-Sep-06 13:33

Thanks for the help.

I'm trying to load the image into the activeChild.
Do not know how to go about this.

eg; select open image from the MdiParent, and have it open in the active MdiChild form.

Greatfull for all comments/Help given.

Thanks

Steve C#freak Smile | :)

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