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What you want to do is to open the file for append. Instead of letting the StreamWriter create the FileStream, open the FileStream yourself so that you can use FileMode.Append when you open it.
If you want to check if the file exists, you have to do that before opening it.
Despite everything, the person most likely to be fooling you next is yourself.
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Hi i got the answere
<br />
StreamWriter objWriter = new StreamWriter(path,true);<br />
StreamWriter Contructor pass two parameter
so the path specify the File and "true" means to append the File
wasim khan
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It's overall simpler to use File.AppendText, File.WriteAllText, etc.
Christian Graus
Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.
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I am with a C#.net Inventory application in one of my form there is a datetimepicker whose value my change according to some selections how can I set the datetimpicker value back to current datetime on a buttion click. I put like datetimepicker1.Text=DateTime.Now.Date.ToString(); but its text is not getting the current datetime
Thanks In advance
Regarda
Anu Palavila
Thanks & Regards
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dateTimePicker1.Value = DateTime.Now.AddHours(-24);
and 24*265 hours will be equal to one year
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dateTimePicker1.Value = DateTime.Now.AddHours(-24);
and 24*365 hours will be equal to one year
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ali zaidi wrote: and 24*365 hours will be equal to one year
No.....
Christian Graus
Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.
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Hi,
Try
dateTimePicker1.Value = DateTime.Now.Date; . If this is not working, check whether there is any other event that is getting fired.
Hope this helps,
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I have created a window application in c# and Sqlserver 2005.
Now on my server the connection string is working properly, but on client machine my databse is not conecting.
my connection string is :
server=192.168.1.88;Data Source=NZN-7FC996E32D7\SQLEXPRESS;Database=HungerLine;Integrated Security=true
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And is the client on the same network as you, so they can see that IP address and it points to the same machine as it does on your server ?
Christian Graus
Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.
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//Insert record into database
conn.Open();
int iResults = cmd.ExecuteScalar();
conn.Close();
if (iResults == 1)
{
}
//The user record was found in the Database
else
{
//The user record was not found in the Database
}
When i debug, there's an error message saying "Cannot implicitly convert type 'object' to 'int'. An explicit conversion exists(are you missing a cast?)
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> "Cannot implicitly convert type 'object' to 'int'
You can't.
> An explicit conversion exists
It does.
> are you missing a cast?
You are.
It goes here: int iResults = (int)cmd.ExecuteScalar();
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I recommend reading the article I link to in my sig, it will explain exactly how to solve these sort of error messages.
And, it's better to use int.TryParse and the ToString method, in general, b/c your code otherwise assumes that the value can be cast to int.
Christian Graus
Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.
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Hi,
I have a native dll that I am interfacing through P/Invoke. I have created the API, but have no way to debug the native code. I tried using windbg for this, but couldn't figure out how. So, my current alternative is to have the native code print to stdout/stderr using fprintf. However, I can't find any way to see this output in C#. Is there a way to capture stdout/stderr output from the native code?
klk
madness ? this.isSparta = true : this.isSparta = false;
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Hi,
what I tend to do in such case is I pass a managed delegate that takes a string and logs it somehow;
the unmanaged side accepts it as a pointer to a function that takes one char* as a parameter.
Each time I want to log some native thing, I call the function pointer, and the managed world
logs it (together with, and in sync with, the managed logging).
Hence no capturing stdout/stderr, just passing a delegate.
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Hi Luc,
I did what you said, and got it to work - so now I can get debugging output sent to the console. Thanks!
It still feels like the old "printf" cycle of debugging (bug -> add printf -> recompile -> pray). Are there any guides on using WinDbg or another debugger to debug code that crosses managed->unmanaged boundaries?
klk
madness ? this.isSparta = true : this.isSparta = false;
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Hi,
K.L.K wrote: I did what you said, and got it to work - so now I can get debugging output sent to the console. Thanks!
Fine.
You're welcome.
K.L.K wrote: It still feels like the old "printf" cycle of debugging (bug -> add printf -> recompile -> pray). Are there any guides on using WinDbg or another debugger to debug code that crosses managed->unmanaged boundaries?
I'm not an expert on WinDbg.
I tend to include such log statement right from the start,
and feel it saves me lots of hassles.
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Hi
i want to use ocr technology to recognize unicode characters from images, i need a full article about this from basic to professional.
i searched over internet and also codeProject and find some useFul artciles, but nothing explained from basic, can anuBody help me ?
thanks
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There's some good books at Amazon that go over OCR from start to finish. IT's still a major task, I assume most articles basically assume you have enough background knowledge to do it.
I can't find my book to give you the title, but if you search Amazon for image processing, you'll find it. Of course, the code is all going to be C, certainly not C#.
Christian Graus
Please read this if you don't understand the answer I've given you. If you're still stuck, ask me for more information.
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Hi All,
I think I've tracked down my earlier Debugging issue. I think the way I have my external DLL's and References to them messed up. What is the correct way to handle this?
I've tried creating a Solution Folder called External_Libs and then added things in there, then my solution projects complain about not being able to load them. So I removed that folder and added in an External_Libs directory to each project and then added in the required DLL's into those and referenced them in those dirs and I still get the same error.
I wanted to keep all the external DLL's in a single directory (External_Libs) rather than having them all set to "Copy Local = True" then ending up with a mass of DLL's in the root directory.
Bit confused!!
Jammer
Going where everyone here has gone before!
My Blog
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why do you want to creat a solutio folder, why don't you make a class library for the APIs you need? gather APIs in a project and build a single dll from that project. then you can add it by 'add reference' in any of your .NET projects.
if there is another error, check your used APIs whether they are correct or not at pinvoke.net.
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The libraries I'm using are 3rd party like Infragistics and so on ... they are not designed to be built into another dll ...
Jammer
Going where everyone here has gone before!
My Blog
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I have a custom control that inherits from ScrollableControl. I'm doing some drawing on the control and one thing I'm missing is a ScrollIntoView(Rectangle), where the rectangle corresponds to the same as Control.Location combined with Control.Size would.
I have tried grabbing PaintEventArgs.ClipRectangle or Graphics.VisibleBounds combined with Control.HorizontalScroll.Value/Control.VerticalScroll.Value and Control.Size, but these seem to include the area "behind" the visual parts of the scrollbars (ie. some graphics will be hidden behind the scrollbars).
How do I go about this?
Thanks!
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Hi All,
I'm just doing my first installation check. The machine i'm installing my app on doesn't have VS or anything with which to debug things with, are there any solutions to this to find out exactly what is causing the problem? Is there some .NET tool to aid in this process?
Thanks,
Jammer
Going where everyone here has gone before!
My Blog
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