Re: Draw rectangle and Ellipes - C# Discussion Boards

Re: How to find number of bands of an image..

SeMartens24-Mar-09 4:07

SeMartens

24-Mar-09 4:07

Where do you get this piece of code? What type is the object "pimg"? What framework do you use? Confused | :confused:

It's not a bug, it's a feature!

Check out my CodeProject article Permission-by-aspect.

Me in Softwareland.

Re: How to find number of bands of an image..

suthakarkrishnan24-Mar-09 4:34

suthakarkrishnan

24-Mar-09 4:34

I got that code from the following link.
In Java, PlanarImage is like Bitmap in C#.

https://jaistuff.dev.java.net/docs/jaitutorial.pdf[^]

Re: How to find number of bands of an image..

Eddy Vluggen24-Mar-09 4:58

Eddy Vluggen

24-Mar-09 4:58

Not in Java, but in the "Java Advanced Imaging" library. If you want to manipulate images, check out the PictureBox.

Bitmaps[^] don't have "bands" in them, that's something that is provided by that particular library.

I don't know whether you can use that Java-library with .NET. As it says on the site: "For some code samples, Java 5 features are required."

--edit--
added an enter for better readability Smile | :)

I are troll Smile | :)

Re: How to find number of bands of an image..

suthakarkrishnan24-Mar-09 20:01

suthakarkrishnan

24-Mar-09 20:01

is it pixel value, i.e. color quantity? then how to get each pixel value of an image?

Re: How to find number of bands of an image..

Eddy Vluggen24-Mar-09 20:54

Eddy Vluggen

24-Mar-09 20:54

There's a GetPixel[^] method in the Bitmap class. That's one way of course (and a slow one) and I bet that there are some open-source image manipulation libraries for .NET.

I are troll Smile | :)

Re: How to find number of bands of an image..

suthakarkrishnan24-Mar-09 4:36

suthakarkrishnan

24-Mar-09 4:36

Using Visual Studio 2005, C#.Net.

Draw rectangle and Ellipes

yesu prakash24-Mar-09 3:58

yesu prakash

24-Mar-09 3:58

Hi,

On a custom control when i try to draw a rectangle in the mouse move i cant able to remove the previous rectangle.It is visible, so when i drag mouse lost of rectangle appear in its path. In the mouse up i need to save the rectangle on the custom control
My requriment is to draw a rectangle or ellipes like MS paint.

How can i delete the previous rectangle in the mouse move before mouse up?

Thankyou
YPKI

Re: Draw rectangle and Ellipes

Xmen Real 24-Mar-09 4:04

Xmen Real

24-Mar-09 4:04

override OnPaint() and draw rect. there as well as override OnMouseMove() and call Refresh().

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R0~53%eYrd8mt^7Z6]iTF+(EWfJ9zaK-iTV.C\y<pjxsg-b$f4ia>

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Re: Draw rectangle and Ellipes

dan!sh 24-Mar-09 4:23

dan!sh

24-Mar-09 4:23

You asked similar thing a day before. Why not search here or on google? There are lots of articles for related to drawing stuff in windows forms.

It is not that tough to do. You just need to understand Mouse events, Paint event and graphics class.

जय हिंद

Equation from Excel

Mkyassuo24-Mar-09 3:46

Mkyassuo

24-Mar-09 3:46

Hi, how are you doing?

In microsoft excel, there is a option to take a polynomial chart, and in this chart there is a option to view a equation that chart done.
I need this equation in C#, I´m trying to use the component Microsoft.Office.Interop.Owc11, but I have not sucessful, I can see the equation in design mode but I can´t get in code mode.
Someone have some idea?

Thanks a lot

Marcio

Process().start does not respect the environment

bbranded24-Mar-09 3:10

bbranded

24-Mar-09 3:10

Hello,

I'm not talking about Kyoto Protocol compliance... it appears that process().start does not respect the PATH environmental variable.

This may be the way that the function works, however; I'm storing the exe that will be started in a path that is in the PATH and attempting to start() it withotu specifying a path.

Is it possible to get start() to search the paths in the PATH variable and have no console window pop up? Apparently, the UseShellExecute property of startupinfo causes a console window to popup even if createnowindow is set to true.

string ApplicationPath = ("desktopiconcmd.exe");<br />
string ApplicationArguments = "save /y";<br />
<br />
Process ProcessObj = new Process();<br />
ProcessObj.StartInfo.FileName = ApplicationPath;<br />
ProcessObj.StartInfo.Arguments = ApplicationArguments;<br />
ProcessObj.StartInfo.UseShellExecute = true;<br />
ProcessObj.StartInfo.CreateNoWindow = true;<br />
ProcessObj.Start();<br />
ProcessObj.WaitForExit();

Thanks,

Matt

Re: Process().start does not respect the environment

bbranded24-Mar-09 3:26

bbranded

24-Mar-09 3:26

Problem solved:

ProcessObj.StartInfo.LoadUserProfile = true[^]
ProcessObj.StartInfo.UseShellExecute = false[^]

<br />
string ApplicationPath = ("desktopiconcmd.exe");<br />
string ApplicationArguments = "save /y";<br />
<br />
Process ProcessObj = new Process();<br />
ProcessObj.StartInfo.FileName = ApplicationPath;<br />
ProcessObj.StartInfo.Arguments = ApplicationArguments;<br />
ProcessObj.StartInfo.LoadUserProfile = true;<br />
ProcessObj.StartInfo.UseShellExecute = false;<br />
ProcessObj.StartInfo.CreateNoWindow = true;<br />
//ProcessObj.StartInfo.RedirectStandardOutput = true;<br />
//ProcessObj.StartInfo.RedirectStandardError = true;<br />
ProcessObj.Start();<br />
ProcessObj.WaitForExit();<br />
//StreamReader srOut = ProcessObj.StandardOutput;<br />
//string sOutput = srOut.ReadToEnd();<br />
//srOut.Close();<br />
//MessageBox.Show(sOutput);

Transparency

furgo_unltd24-Mar-09 2:45

furgo_unltd

24-Mar-09 2:45

Hello
I need some help please regarding image transparency.
What I want to do is set an image transparency(jpg,png) with the help of a trackbar.
Best regards Andrei!

Re: Transparency

King Julien24-Mar-09 3:42

King Julien

24-Mar-09 3:42

Check this Post...

http://www.codeproject.com/KB/cs/transparentwindowsincsharp.aspx[^]

Have a Happy Coding.....

Re: Transparency

furgo_unltd24-Mar-09 3:55

furgo_unltd

24-Mar-09 3:55

Luckily I know how to do that but sadly a picture box doesn't behave exactly like a form I didn't find any attributes regarding the opacity of a picture box in the code view

Re: Transparency

Xmen Real 24-Mar-09 4:15

Xmen Real

24-Mar-09 4:15

you will need to use ImageAttributes and ColorMatrix

ImageAttributes ia = new ImageAttributes();
ColorMatrix cm = new ColorMatrix();
cm.Matrix33 = 0.5f; // half transparent
ia.SetColorMatrix(cm);

now you can use above ImageAttributes instance when drawing image.

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Fading Form

cdpace24-Mar-09 2:26

cdpace

24-Mar-09 2:26

Hay guys i want to fade the background of the form but i dont want to fade the controls in it. is this possabile? and btw the forms are loading in an mdicontainer

Re: Fading Form

Vimalsoft(Pty) Ltd24-Mar-09 2:35

Vimalsoft(Pty) Ltd

24-Mar-09 2:35

Look at the Opacity property of the Form and set it to a number close to zero

Vuyiswa Maseko,

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C#/VB.NET/ASP.NET/SQL7/2000/2005/2008
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Re: Fading Form

cdpace24-Mar-09 3:14

cdpace

24-Mar-09 3:14

I cant because that will also fade the controls on the form. I need to fade only the background of the form.

Re: Fading Form

musefan24-Mar-09 3:29

musefan

24-Mar-09 3:29

what about trying something with the TransparencyKey property of the form.

you could try setting the form to be Red then using Red as the key, that way you may still get the controls full opacity. Im not 100% on this thou, do you want the form to be completely transparent or still some visible?

Life goes very fast. Tomorrow, today is already yesterday.

Re: Fading Form

Xmen Real 24-Mar-09 4:07

Xmen Real

24-Mar-09 4:07

musefan wrote:
what about trying something with the TransparencyKey property of the form.

TransparencyKey works only with exact color.

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Re: Fading Form

musefan24-Mar-09 4:10

musefan

24-Mar-09 4:10

yeah which as i said, can use red to set form to be transparent and controls still visible. I can only work with the info the OP gives that why i asked more questions

Life goes very fast. Tomorrow, today is already yesterday.

get solution

Rahad Rahman24-Mar-09 2:01

Rahad Rahman

24-Mar-09 2:01

How To Save image in any directory/foldar and how to show image in any picturebox in windows application

Re: get solution

harold aptroot24-Mar-09 2:04

harold aptroot

24-Mar-09 2:04

Did you even try it? It's very easy, I can't imagine you actually need help with this..

Re: get solution

Megidolaon24-Mar-09 2:14

Megidolaon

24-Mar-09 2:14

I actually wonder what is taught on collleges, if we always get question by clearly clueless people.
I mean, college is hardly learning by doing, it should much more theory than praxis.

So, that must mean people that post such clueless questions here don't pay attention during lessons.

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