Re: Byte Conversion - C# Discussion Boards

10-Dec-08 20:30

Hi all,

im having a problem with retrieving a binary file from the database and reading it in my code, so far i have this:

byte AttachmentByte = new byte();
AttachmentByte = StringToByteArray(inputString);

and a function to convert it:

public static byte[] StringToByteArray(string inputString)
{
System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
return encoding.GetBytes(inputString);
}

but when i run it i get the error:

Cannot implicitly convert type 'byte[]' to 'byte'

can someone please tell me what im doing wrong.

thanks in advance!

living life on the flip side

Giorgi Dalakishvili10-Dec-08 20:37

10-Dec-08 20:37

StringToByteArray returns byte[] while AttachmentByte is defined as byte.

Giorgi Dalakishvili

#region signature
My Articles

Asynchronous Registry Notification Using Strongly-typed WMI Classes in .NET [^]

My blog
#endregion

N a v a n e e t h10-Dec-08 20:44

N a v a n e e t h

10-Dec-08 20:44

Agweet wrote:
byte AttachmentByte = new byte();
AttachmentByte = StringToByteArray(inputString);

byte[] AttachmentByte;
AttachmentByte = StringToByteArray(inputString);

Navaneeth

How to use google | Ask smart questions

Agweet10-Dec-08 20:59

10-Dec-08 20:59

Hi guys,

thanks for the quick replies,

the problem is that i tried using:

byte[] AttachmentByte;

then it gives the error on the filestream:

using (System.IO.FileStream fs = System.IO.File.Create(newPath))
      {
         fs.WriteByte(AttachmentByte);
      }

i get the errors:

The best overloaded method match for 'System.IO.Stream.WriteByte(byte)' has some invalid arguments
Argument '1': cannot convert from 'byte[]' to 'byte'

is there something else im missing?

living life on the flip side

N a v a n e e t h10-Dec-08 21:05

N a v a n e e t h

10-Dec-08 21:05

Agweet wrote:
is there something else im missing?

Yes. A good C# book.

Seriously, the error message you got is self explanatory. It has some invalid arguments. Look at the documentation for that method and see what arguments it expects. BTW, this some different code you are showing than the one given in the original post.

Navaneeth

How to use google | Ask smart questions

Agweet10-Dec-08 21:10

10-Dec-08 21:10

thanks once again for the reply, i know that i posted other code...im trying to retrieve a binary file stored in the database and write it to my local machine, with use of creating a folder and using a filestream.

thanks for all the advise Smile | :)

living life on the flip side

Giorgi Dalakishvili10-Dec-08 21:09

10-Dec-08 21:09

WriteByte writes just a single byte to the stream but you need to write byte[] so use the overload that writes byte[] to the stream. That's it Smile | :)

Giorgi Dalakishvili

#region signature
My Articles

Asynchronous Registry Notification Using Strongly-typed WMI Classes in .NET [^]

My blog
#endregion

Agweet10-Dec-08 21:13

10-Dec-08 21:13

Hi Giorgi,

sorry but i have never used filestreams or binary files before, how would i go about using the overload that writes byte[]?

living life on the flip side

Giorgi Dalakishvili10-Dec-08 21:18

10-Dec-08 21:18

As suggested by Navaneeth you need a good C# book. As for FileStream, you can have a look at its method at this msdn link: FileStream Methods[^]

Giorgi Dalakishvili

#region signature
My Articles

Asynchronous Registry Notification Using Strongly-typed WMI Classes in .NET [^]

My blog
#endregion

Agweet10-Dec-08 21:23

Uploading data using ftpwebrequest method in c#

10-Dec-08 21:23

Hi Giorgi,

thanks for everything, to all the people that replied Laugh | :laugh:

living life on the flip side

vnr10-Dec-08 20:19

vnr

10-Dec-08 20:19

hi,

in my application i need to upload the data to the serevr using ftpwebrequest method .I need to upload 2 files one is a zip file (more than 10 MB) and other is a text file to the same server. when iam uploading total zip content is not getting uploaded to the serevr and its returning error like
" The underlying connection was closed: An unexpected error occurred on a receive." So please can anybody help me where exactly the problem is.Is that the problem with the code or serevr settings.

Thanks in advance

Here is my code

private static void Upload()
{
string[] strar = new string[] { sourcepath + ".zip", sourcepath + ".txt" };
foreach (string str in strar)
{
FileInfo fileInf = new FileInfo(str);

string uri = "ftp://" + ftpServerIP + "/" + fileInf.Name;
FtpWebRequest reqFTP;

// Create FtpWebRequest object from the Uri provided
reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + fileInf.Name));

//Set the proxy to null to get around the "the requested ftp command is not supported when using http proxy" error
reqFTP.Proxy = null;

reqFTP.Timeout = 2000000000;

// Provide the WebPermission Credintials
reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword);

// By default KeepAlive is true, where the control connection is not closed
// after a command is executed.
reqFTP.KeepAlive = false;

// Specify the command to be executed.
reqFTP.Method = WebRequestMethods.Ftp.UploadFile;

// Specify the data transfer type.
reqFTP.UseBinary = true;

// Notify the server about the size of the uploaded file
reqFTP.ContentLength = fileInf.Length;

// The buffer size is set to 2kb
int buffLength = 2048;
byte[] buff = new byte[buffLength];
int contentLen;

// Opens a file stream (System.IO.FileStream) to read the file to be uploaded
FileStream fs = fileInf.OpenRead();

try
{
// Stream to which the file to be upload is written
Stream strm = reqFTP.GetRequestStream();
//mydelegate delinstance = new mydelegate(Writedata);
//int result;

//Stream strm = reqFTP.BeginGetRequestStream(null, null);
//Stream strm = reqFTP.BeginGetRequestStream(delinstance,result);

// Read from the file stream 2kb at a time
contentLen = fs.Read(buff, 0, buffLength);
//progressBar1.Maximum = contentLen;
// Till Stream content ends
//progressBar1.Step=10;

while (contentLen != 0)
{
// Write Content from the file stream to the FTP Upload Stream
strm.Write(buff, 0, contentLen);
contentLen = fs.Read(buff, 0, buffLength);
//if (progressBar1.Value < progressBar1.Maximum)
// progressBar1.PerformStep();
}
//progressBar1.Value = 0;

// Close the file stream and the Request Stream
strm.Close();
fs.Close();
Console.WriteLine("Uploading completed for file " + str);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message, " Upload Error");
Console.ReadLine();
}
Console.ReadLine();
}
}

validation

kulandaivel_mca200710-Dec-08 20:12

kulandaivel_mca2007

10-Dec-08 20:12

I HAVE ONE TEXTBOX TO GET MOBILE NUMBER AS INPUT....

IF ANY TEXT ENTER IN THE TEXTBOX MEANS IT WILL SHOW...

"ENTER ONLY DIGITS"....

SEND ME SUGESSTION...

USING WINDOWS APPLICATION...

Re: validation

Giorgi Dalakishvili10-Dec-08 20:14

Run ppt with C# - urgent !!!!

10-Dec-08 20:14

1. Don't use caps lock while posting a question.

2. Don't request something, just as nicely Smile | :)

3. Look at KeyPressed event of textbox or use Google to find more help.

Giorgi Dalakishvili

#region signature
My Articles

Asynchronous Registry Notification Using Strongly-typed WMI Classes in .NET [^]

My blog
#endregion

Re: validation

dan!sh 10-Dec-08 21:19

dan!sh

10-Dec-08 21:19

Use masked textbox.

salon10-Dec-08 19:05

10-Dec-08 19:05

I am creating a folder watcher application.
If a new powerpoint file gets added in the folder it should get started automatically.
So if I put .pps file into the folder then and I say
System.Diagnostics.Process.Start(fullPath);

it works fine.
This is not the case with .ppt files
Only the powerpoint application gets started not the slideshow.I want the slideshow to be started.

I have done some R & D and found that Microsoft.Office.Interop.PowerPoint will help and done something like this

Microsoft.Office.Interop.PowerPoint.Application ppApp = new Microsoft.Office.Interop.PowerPoint.Application();<br />
								ppApp.Visible = MsoTriState.msoTrue;<br />
								Microsoft.Office.Interop.PowerPoint.Presentations oPresSet = ppApp.Presentations;<br />
								Microsoft.Office.Interop.PowerPoint._Presentation oPres = oPresSet.Open(e.FullPath,<br />
									MsoTriState.msoFalse, MsoTriState.msoFalse,<br />
									MsoTriState.msoTrue);<br />

But this is also doing the application open not the slideshow, does anybody have any idea?
Also I want rest all powerpoint presentations gets closed and only currently added powerpoint application gets started as slideshow.

Thanks in advance,

Christian Graus10-Dec-08 19:19

Christian Graus

10-Dec-08 19:19

I'm not sure how possible that is. If double clicking doesn't open PPT, then PPT is not responding to being passed the application as a command parameter.

Christian Graus

Driven to the arms of OSX by Vista.

salon10-Dec-08 19:43

10-Dec-08 19:43

Thanks for quick reply,
I am not very much clear with your answer.
Actually I want the ppt application start automatically when it gets placed in the folder under watch.

N a v a n e e t h10-Dec-08 19:52

N a v a n e e t h

10-Dec-08 19:52

salon wrote:
I want the ppt application start automatically when it gets placed in the folder under watch.

Assuming you have a FolderWatch watching on the folder, when a file is placed in the folder, run Process.Start("YourPPTFileName"). It will open the PPT file in associated application.

Navaneeth

How to use google | Ask smart questions

salon10-Dec-08 20:04

10-Dec-08 20:04

yes. You are correct. This code segment will start the ppt application, but i want to start the slideshow.... not the applciation...

If u use the same code segment for .pps files, it will start the slideshow directly....
The same thing I want with .ppt files.....

I know there is a way with

Microsoft.Office.Interop.PowerPoint.Application ppApp = new Microsoft.Office.Interop.PowerPoint.Application();

And inside this there is an event named "SlideShowBegin" but I am not getting how to use this event to start the slideshow.... Sniff | :^)

Giorgi Dalakishvili10-Dec-08 20:12

10-Dec-08 20:12

In order to start as presentation either rename ppt file to pps file programmaticaly or use command line switched to start ppt file as a slideshow.

Command line switches for PowerPoint[^]

Available switches and parameters for Office PowerPoint 2007[^]

Giorgi Dalakishvili

#region signature
My Articles

Asynchronous Registry Notification Using Strongly-typed WMI Classes in .NET [^]

My blog
#endregion

salon10-Dec-08 22:35

10-Dec-08 22:35

Thanks friends for your valuable replies. The main problem is solved of launching the slideshow of .ppt files.. with the help of this code

<br />
Microsoft.Office.Interop.PowerPoint.Application ppApp = new Microsoft.Office.Interop.PowerPoint.Application();<br />
								ppApp.Visible = MsoTriState.msoTrue;<br />
								Presentations ppPresens = ppApp.Presentations;<br />
								Presentation objPres = ppPresens.Open(e.FullPath, MsoTriState.msoFalse, MsoTriState.msoTrue, MsoTriState.msoTrue);<br />
								Slides objSlides = objPres.Slides;<br />
								Microsoft.Office.Interop.PowerPoint.SlideShowWindows objSSWs;<br />
								Microsoft.Office.Interop.PowerPoint.SlideShowSettings objSSS;<br />
<br />
								//Run the Slide show<br />
								objSSS = objPres.SlideShowSettings;<br />
<br />
								objSSS.Run();<br />
								objSSWs = ppApp.SlideShowWindows;<br />
								while (objSSWs.Count >= 1) System.Threading.Thread.Sleep(100);<br />
<br />
								//Close the presentation without saving changes and quit PowerPoint<br />
								objPres.Close();<br />
								ppApp.Quit();<br />

Now I want to close all the running powerpoint files and only want to run the current one only...

Does any body have any idea?