Re: IFormatProvider.GetFormat - C# Discussion Boards

17-Jun-08 23:39

public class DownloadQueue<TCallBack>
{
}

In the above code, I need to allow only delegate types for TCallBack. I am not able find System.Delegate in the "where" condition. I tried this

public class DownloadQueue<TCallBack> where TCallBack : System.Delegate
{
}

But it's not allowing to write so. Any other methods for this ?

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Pete O'Hanlon18-Jun-08 0:13

Pete O'Hanlon

18-Jun-08 0:13

Certain types are restricted from being used as generic constraints. Unfortunately, this is one of them (enum is another).

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N a v a n e e t h18-Jun-08 0:43

18-Jun-08 0:43

Thanks Pete. Any alternative method to ensure it ?

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led mike18-Jun-08 5:18

led mike

18-Jun-08 5:18

How does typing a generic parameter to System.Delegate help? It might be that you have a design issue that needs a different solution or perhaps requires a better understanding of the problem to begin with.

led mike

N a v a n e e t h18-Jun-08 6:43

IFormatProvider.GetFormat

18-Jun-08 6:43

Yes you are correct. I had a design issue and I solved it. Your help is much appreciated.

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George_George17-Jun-08 23:08

George_George

17-Jun-08 23:08

Hello everyone,

I debugged the sample carefully. But one question I can not find from MSDN, who calls method IFormatProvider.GetFormat of class AnyRadix? When we call String.Format, this function is called?

http://msdn.microsoft.com/en-us/library/system.iformatprovider.getformat(VS.80).aspx

thanks in advance,
George

Simon P Stevens17-Jun-08 23:19

Simon P Stevens

17-Jun-08 23:19

This line passes the format provider to the String.Format method

Console.WriteLine( String.Format( provider, messageStr, argToConvert ) );

String.Format calls the GetFormat method on the provider to get the formatter. You can look at the Code in for String.Format in reflector to see what's going on. (Haven't tried this myself)

You can see this in the debugger by sticking a breakpoint in the GetFormat method and waiting till it is hit then looking at the call stack. (Debug->Windows->CallStack (Ctrl+D,C))

Simon

George_George17-Jun-08 23:52

George_George

17-Jun-08 23:52

Thanks Simon!

My study result is, when calling String.Format( provider, messageStr, argToConvert ),

1.

provider.GetFormat is called and returned an intance of AnyRadix;

2.

Then Format method is called on the returned instance of AnyRadix, and messageStr/argToConvert are passed as formatString/argToBeFormatted parameter, and a string is returned from Format method -- the returned string is also treated as the result of String.Format call -- String.Format( provider, messageStr, argToConvert ).

My analysis correct?

regards,
George

Simon P Stevens18-Jun-08 0:18

Simon P Stevens

18-Jun-08 0:18

Sounds about right. Like I say, I haven't looked in reflector myself.

Simon

How to package and deploy Ms SQL express

George_George18-Jun-08 0:38

George_George

18-Jun-08 0:38

Thanks for your help, Simon!

regards,
George

Newbie_Toy17-Jun-08 22:39

Newbie_Toy

17-Jun-08 22:39

I have to deploy my application which uses MS SQL Express as a database. I have to deploy my program to end-user who knows nothing about database configuration. How can I deploy my project and MSSQL express with one MSI installation package. I've found an answer in expert-exchange, but they won't let me in, as I have to pay. Thanks you guys

Re: How to package and deploy Ms SQL express

Simon P Stevens17-Jun-08 23:11

Simon P Stevens

17-Jun-08 23:11

1st, try the databases forum. This one is for c# questions.

2nd. If you scroll to the very very very bottom of the experts exchange page, they have all the answers uncovered for free. (Yes, I know it's weird, it's some kind of advertising con to get people to pay them for free content)

Good luck

Simon

unhandeled exception occure when form is open , running from exe in c#.

nomi17-Jun-08 21:52

nomi

17-Jun-08 21:52

hi!
i m using c# , i used EXpTreeLib.dll , tree view and one more dll Emmaculate.dll , thumbnelview , the

probelm is that when i making a setup using Setup&deployment wizard i added both dll , project is working

fine but when i open this form then the unhandeled exception occured Error path not found etc in other

system not mine , in my pc when i running the project is working fine , may its not getting control path

what should i do .................plz help me

i think i should register the dll in other system on which i m running the exe but ,
when i register the both dll , ExpTreeLib.dll , emmaculate.dll in other system in which i m running exe

after making setup
error occure dll not register entry point not found.

in my pc project running fine , setup complete fine and also exe running fine but when i deploy in other

system then its making a problem in that form that is using both dll.

Entry point not found ..............
on run :
regsvr32 c:\ExpTreeLib.dll
error occure entry point not found may i registed that dll so its resolve the above problems.

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Re: unhandeled exception occure when form is open , running from exe in c#.

dan!sh 17-Jun-08 22:06

dan!sh

17-Jun-08 22:06

nomi wrote:
entry point not found

Likely cause might be that method Main is missing.

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Re: unhandeled exception occure when form is open , running from exe in c#.

nomi17-Jun-08 22:27

nomi

17-Jun-08 22:27

dani thanks to reply , yar i wanna know that y its running fine in my system and when i deploy on other system then this form is generate a error , path is not missing unhadeled exception etc in this form i just use two dll that i define earlier so what should i do , should i register the dll or what can i do , and how to know where is the error , means main cause of the error ......

Love is Life & Life is Love!

Re: unhandeled exception occure when form is open , running from exe in c#.

dan!sh 17-Jun-08 22:37

dan!sh

17-Jun-08 22:37

Are you providing right function name and passing right arguments while calling the function of the dll?

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Re: unhandeled exception occure when form is open , running from exe in c#.

nomi17-Jun-08 22:53

nomi

17-Jun-08 22:53

yes offcourse bcz its running fine on my system , error occure in other computer when i running the exe of the project , error just occure in particular form others are working fine

may dll not getting its path , i dont understand how can i know what is the source of error

Love is Life & Life is Love!

Regarding ActiveX

Member 477486817-Jun-08 21:30

Member 4774868

17-Jun-08 21:30

here i have created one of user control in C#, and i want make it to Activex Control, how can i call the dll without contain any interface in my application, i have only the events like click, plug..........

here how can i too cal that dll into Javascript........

Display image on Bitmap

asma_panjabi17-Jun-08 20:28

17-Jun-08 20:28

i am trying to pick a image file from open dialog box and send to other user in C#.net

private System.Windows.Forms.OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.RestoreDirectory = true;
openFileDialog1.FileName = "";
openFileDialog1.Filter = "Graphic Interchange Format (*.gif)|*.gif|" +
"JPEG File Interchange Format (*.jpg;*.jpeg)|*.jpg;*.jpeg";
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
string filename = openFileDialog1.FileName.Substring(openFileDialog1.FileName.LastIndexOf("\\") + 1);
File.Copy(openFileDialog1.FileName, Application.StartupPath + "\\Temp\\" + filename, true);
string fname = Application.StartupPath + "\\Temp\\" + filename;
if(File.Exists(fname))
WhiteBoard1.iSelected = fname;

FileInfo info = new FileInfo(WhiteBoard1.iSelected);
long filesize = info.Length;
if(filesize>0)
{

WhiteBoard1.strConfid = strConfid;
WhiteBoard1.LoadImage();
}
}

In whiteboard class

public void LoadImage()
{
try
{
Graphics grphs = CreateGraphics();

if(File.Exists(iSelected))
{
Image img1 = Image.FromFile(iSelected);
pict.Image=img1;
}
}
catch(OutOfMemoryException)
{

MessageBox.Show(msg.ToString());

}
}

I get exception as

OutofMemory Exception

N a v a n e e t h17-Jun-08 21:28

17-Jun-08 21:28

How big is the file ?

asma_panjabi wrote:
string filename = openFileDialog1.FileName.Substring(openFileDialog1.FileName.LastIndexOf("\\") + 1);

getting file name ? Use System.IO.Path.GetFileName()

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asma_panjabi17-Jun-08 21:32

17-Jun-08 21:32

It doesnt work for any size of file

asma_panjabi17-Jun-08 23:54

17-Jun-08 23:54

sometimes it executes for .jpg but it never takes .gif file. Please some solution for it.

Anthony Mushrow18-Jun-08 0:13

Anthony Mushrow

18-Jun-08 0:13

asma_panjabi wrote:

string filename = openFileDialog1.FileName.Substring(openFileDialog1.FileName.LastIndexOf("\\") + 1);
File.Copy(openFileDialog1.FileName, Application.StartupPath + "\\Temp\\" + filename, true);
string fname = Application.StartupPath + "\\Temp\\" + filename;

Whats all this part about? Why not just use the path that the OpenFileDialog gets?

Also, why do you have a Graphics grphs = CreateGraphics(); it doesn't get used in the code you posted and idealy you shouldn't be using it anyway. If you want to draw to your form you should do it in the OnPaint event.
I mean, that Graphics object could be the thing causing your problems, try moving it out of the try block and see what happens.

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asma_panjabi18-Jun-08 0:33