Re: Memory Management - C# Discussion Boards

I can't Create File in the dir that FileSystemWatch monitor by using FileStream

6-Sep-05 17:47

I have some problem about FileSystemWatch

I use FileSystemWatch to monitor the dir "D:\\TEMP"
And I want to create a file in the dir "D:\\TEMP" , so path="D:\\TEMP\\test.xml"

Then It's fail when I create the File in the dir by using FileStream
And It's fail when I copy the File to the dir by using File.Move();

It's very unreasonable. =.=

My program is below ..

-------------------------------------------------------------------------
//*** Program Slice 1
public string Path = "D:\\TEMP";

//*** Program Slice 2
//*** Create FileSystemWatcher
FSWatcher1 = new System.IO.FileSystemWatcher();
FSWatcher1.Path = Path;
FSWatcher1.IncludeSubdirectories = false;
FSWatcher1.EnableRaisingEvents = true;
FSWatcher1.Created += new System.IO.FileSystemEventHandler(FSWatcher1_Created);

//*** Program Slice 3
//*** Trigger when File is Created
private void FSWatcher1_Created(object sender, System.IO.FileSystemEventArgs e)
{
//*** do something
Debug.WriteLine("〔"+e.Name+">〔"+e.FullPath+">〔"+sender.ToString()+ ">");
}

//*** Program Slice 4
//*** I found that the file is created in the dir ,
//*** but when it execute the line "m_streamWriter.Close();" , the file created is gone
FileStream fs = new FileStream(Path , FileMode.Create , FileAccess.Write);

StreamWriter m_streamWriter = new StreamWriter(fs , Big5);
m_streamWriter.BaseStream.Seek(0, SeekOrigin.End);
m_streamWriter.Write(Result);
m_streamWriter.Flush();
m_streamWriter.Close();

//*** Program Slice 5
//*** Then I use the method File.Move , It's still fail
File.Delete(Path);
File.Copy(Path_Temp , Path);

-- modified at 4:07 Wednesday 7th September, 2005

Re: I can't Create File in the dir that FileSystemWatch monitor by using FileStream

Dave Kreskowiak8-Sep-05 1:40

Dave Kreskowiak

8-Sep-05 1:40

The FileSystemWatcher won't prevent you from creating files in the watched directory. There's got to be something else that's preventing you from doing this. A Permissions issue, perhaps?

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Change Parent form from Dialog Box

bootn6-Sep-05 17:11

bootn

6-Sep-05 17:11

Hi Everyone,

I would like to know how i go about changing a parent form from a child form.

For example from the main menu click search, it pops up you choose search for client, you notice the client doesnt exist so you click a button marked "Add New" it should then close the pop-up form and change the main menu form to the client details form, loading a blank record.

Any help would be fantastic, even a push in the right direction.

Cheers.
Paul

Re: Change Parent form from Dialog Box

Christian Graus6-Sep-05 17:29

Christian Graus

6-Sep-05 17:29

In C#, what you need to do is use delegates. These are basically function pointers, you set them up in the dialog, and define them when you create the dialog to be a method in the main form. Then the main form gets a callback event when ( for example ) the Add New button is pushed, and can respond however it likes.

Christian Graus - Microsoft MVP - C++

Memory Management

VickyC#6-Sep-05 15:08

VickyC#

6-Sep-05 15:08

I am fairly new to C# and I am building an application that has multiple forms. Initially my application consumes 1 mb of memory. Then as I open forms the amount of memory increases to several mb. When I close the forms the memory is not released. If I reopen the same form the memory does not increase proportionally. But it keeps increasing. How can I make sure that the memory is released?