C# file to Byte Array and Byte Array to File

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I already convert the file to byte array and save in the MYSQL Database.
I need to convert the byte array to file to send the file to another program.

Thanks

Posted 13-Aug-13 6:00am

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joshrduncan2012 13-Aug-13 12:08pm

So what's your question?

David_Wimbley 13-Aug-13 12:10pm

" I need to convert the byte array to file to send the file to another program."

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David_Wimbley · Answer 1 · 2013-08-13T06:10:00

You would need to know your file extension. Im assuming you either have it in the table or its the same file extension no matter what (say pdf).

1) Read/Write a file to a byte array and back to file

C#

//Read file to byte array

FileStream stream = File.OpenRead(@"c:\path\to\your\file\here.txt");
byte[] fileBytes= new byte[stream.Length];

stream.Read(fileBytes, 0, fileBytes.Length);
stream.Close();
//Begins the process of writing the byte array back to a file

using (Stream file = File.OpenWrite(@"c:\path\to\your\file\here.txt"))
{
   file.Write(fileBytes, 0, fileBytes.Length);
}

Unless i completely misunderstood your question that should be what you are asking for i believe.

lewax00 · Answer 2 · 2013-08-13T06:35:00

Solution 3

Easiest solution is:
File.ReadAllBytes[^] to get the byes and File.WriteAllBytes[^] to write it back to a file.

Posted 13-Aug-13 6:35am

lewax00

Maarten Kools · Answer 3 · 2013-08-13T06:09:00

Solution 1

Can a Byte[] Array be written to a file in C#?[^]

Posted 13-Aug-13 6:09am

Maarten Kools

nikku_aryan · Answer 4 · 2015-07-19T23:26:00

public ActionResult Document(int id)
{
var obj = new CEATLMSEntities().LeaveDocuments.Where(c => c.Id == id).FirstOrDefault();
string[] stringParts = obj.FName.Split(new char[] { '.' });
string strType = stringParts[1];
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.AddHeader("content-disposition", "attachment; filename=" + obj.FName);
var asciiCode = System.Text.Encoding.ASCII.GetString(obj.Document);
var datas = Convert.FromBase64String(asciiCode.Substring(asciiCode.IndexOf(',') + 1));
//Set the content type as file extension type
Response.ContentType = strType;
//Write the file content
this.Response.BinaryWrite(datas);
this.Response.End();
return new FileStreamResult(Response.OutputStream, obj.FType);
}

C# file to Byte Array and Byte Array to File

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