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Can anyone help?
My application is reciving an array of data via TCP. This data has a JPEG image within it, aswell as other data. Once I have extracted to an array the JPEG image, I need to display it in a PictureBox control. Ideally converting my JPEG array into an Image class object would allow me to give the PictureBox the Image object for displaying. My problem is that I can see no way to do this apart from saving the JPEG array to a JPEG file and get the PictureBox control to load in the JPEG image by calling Image.FromFile(FilePath); I would rather not create a file as the application will be receiving lots of JPEG's and would cause high hard drive activity.
I would be gratefull for any help.
Thanks in advance.
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Let's say you get byte[] data;
Do something like this:
MemoryStream ms = new MemoryStream(data);
(MemoryStream is in System.IO)
Then create an Bitmap instance by giving the created stream.
Bitmap bitm = new Bitmap(ms);
or with Image
Image image = Image.FromStream(ms);
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MemoryStream! never new it existed. Thank you, that will do the trick.
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Hi all,
I want to create a window system service that sits on the background and just fire another service/executable (i.e, notepad) every time a new user fast switches to a new session. How can I start a new process in another user sessions in WinXP using .NET 1.1 or 2.0? also how can detect the event of user fast switch to a new session?
thanks in advance...
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Hi !
I want to enter in a textBox only "Number" ,with the following function :
public bool IsNumeric(string val)<br />
{<br />
try<br />
{<br />
double result = 0;<br />
return Double.TryParse(val, System.Globalization.NumberStyles.Any, System.Globalization.NumberFormatInfo.CurrentInfo, out result);<br />
}<br />
catch<br />
{<br />
return false;<br />
}<br />
}and for txtNumber_TextChanged event i wrote :
if (this.IsNumeric(txtNumber.Text.ToString())==false)<br />
txtNumber.Text="";
but I can enter "5.5" or "6/8" in the TextBox .
how can it possible that the user enter "ONLY Number " in textbox.
thanks !
s_mostafa_h
-- modified at 7:08 Friday 24th February, 2006
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I wrote this code once, I just checked the code of every new entered char, if it is bigger that the char code for '9' or smaller than the char code '0', than its not a number (I'm not sure that 9 is the biggest char).
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mostafa_h wrote: but I can enter "5.5" or "6/8" in the TextBox .
how can it possible that the user enter "ONLY Number " in textbox.
You are parsing the string to a double, so why shouldn't you be able to enter 5.5? It is a double!
If you want only integers then use int.Parse.
Otherwise you can check each character entered as the other poster has proposed. Use Char.IsDigit to determine if it is a valid digit and reject anything else. But consider whether you need to support negative numbers as well. In that case you need to check for - as well.
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thanks for your reply !
but , the result of int32.Pars(.....) is not a boolean .
regards !
s_mostafa_h
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dan neely wrote: int32.TryParse(...)
ARE YOU SURE !
Int32 , has not "TryPars" method .
s_mostafa_h
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It doesn't need to return a boolean. If it fails it will throw an exception which you are trapping already in your code.
In fact the trapping you were using with double.TryParse should be unneccessary because I don't think you can make TryParse throw an exception (it returns false instead).
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Hi,
I am using CSharpCodeProvider for the first time (.NET 1.1 & VS2003). My application has been used without problems for a few weeks.
Now I started using an external assembly (PortController.NET) from the generated assembly.
I can access the generated assembly (create objects and call methods) but when it reaches the poing where it uses PortController.NET (creating new object) I get the exception:
File or assembly name PortController.NET, or one of its dependencies, was not found.
But it works when executed through the debugger!?
My code looks like this:
ICodeCompiler comp = (new CSharpCodeProvider().CreateCompiler());<br />
CompilerParameters cp = new CompilerParameters();<br />
cp.ReferencedAssemblies.Add("system.dll");<br />
cp.ReferencedAssemblies.Add(@"C:\Program Files\PortController.NET\PortController.NET.dll");<br />
cp.GenerateExecutable = false;<br />
cp.GenerateInMemory = true;<br />
<br />
CompilerResults cr = comp.CompileAssemblyFromFile(cp, filepath);
In VS2003 PortController.NET is listed in the .NET list (for adding references) so I guess it's in the GAC.
Any suggestions?
Thanks,
Jan
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Hi,
The problem is probably with Fusion ( the system responsible for loading assemblies ).
You cannot load an assembly that lives outside the .exe directory structure.
So either make sure the PortController.NET.dll assembly is in the GAC, or just put it in the same directory as your .exe. Either way, remove the path from the call to ReferencedAssemblies.Add.
If this doesn't work you will have to use Fuslogvw.exe to check the fusion logs. I seem to remember you have to clear your temporary internet files first.
You used to be able to view the GAC using Explorer ( at C:\Windows\assembly ), but I just checked my system and it seems to have disappeared 
----------------------------
Be excellent to each other 
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Thanks for a very fine and serious answer. 5 from here.
I can't wait to get back to work monday.
Cheers
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Hi all,
I wonder if i can program in c# only so the framework enviournment will net be needed on deployment ?
what if i have made a .NET package with forms/API/system tray and now i dont want the .net thing? can i use the code to be compiled in a non framework enviournment?
Thanks,
Ran.
R.Z
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ranzask wrote: I wonder if i can program in c# only so the framework enviournment will net be needed on deployment ?
It will be needed, always.
ranzask wrote: can i use the code to be compiled in a non framework enviournment?
No, sorry. But you can write your own compiler and class library.  It would be great!
C# is a standard ECMA language, but all the available compilers (Microsoft and Mono) require a specific framework.
___________________________________
Tozzi is right: Gaia is getting rid of us.
My Blog [ITA]
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I hope I understood you rightfully.
C# only exists for .NET (as I know). If you use C# you use .NET. If you don't want to use .NET you have to use another language (like C++). You can compile a C# Programm for other plattforms (Linux, Mac OS) but you use .NET.
Greetings,
Ingo
------------------------------
A bug in a Microsoft Product? No! It's not a bug it's an undocumented feature!
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There are *expensive* 3rd party tools that can create a standalone executable by statically linking the needed parts of the framework into your app, there isn't a provided way to do so.
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You're a little wrong.
C# is a (standard) language, so *theoretically* it can be compiled to any platform. You only need a compiler.
The problem is that all the real-world implementations of a C# compilers require the .NET Framework (csc.exe or the Borland something.net) or the Mono Framework (Mono compiler).
The 2 frameworks' BCL are not equal: many classes haven't the same name and/or aren't in the same namespace, so the same code won't compile on the 2 frameworks.
___________________________________
Tozzi is right: Gaia is getting rid of us.
My Blog [ITA]
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Hi all,
Because my internet connection is through proxy server so that I can't use the TcpClient to connect to the peer who is outsite from my network. Are there any solution to solve this problem ?
Thanks,
Ken
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Hi,
If your network only allows http through a proxy server, then the answer is no.
You need to get your Network Admin to set up NAT on your router.
----------------------------
Be excellent to each other
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Hello kendao,
It is not metter that you are through proxy or not. But it is metter that a peer has a real IP. Means peer is not inside proxy.
I hope you understand what i want to say.
And still there is another problem then i am sorry.
Regards,
Divyang Mithaiwala
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I'm building an application and I'm trying to use my own class which adds a bit extra information to a TreeNode. But even though I override ToString() when they are rendered by the TreeView they seem to use the standard TreeNode.ToString(). I'm guessing this is because when the TreeView iterates the Nodes it contains it treats them as TreeNodes. That would make sense. So the question is what is there a way to override TreeNode.ToString() or get the TreeView to treat the objects as MyTreeNodes rather than ordinary ones.
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Hi!
I guess you'd have to override the Text property of TreeNode, not the ToString() method.
Regards,
mav
--
Black holes are the places where god divided by 0...
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