How to write binary to file - asp.net

Question

I have code that's supposed to read binary values from the database and convert it into a zip file. It only creates a file that's 43kb big and it can't be extracted. What am I missing?
com = new SqlCommand("SELECT BinFile FROM tbl_reports WHERE DBKey=411", conString);
byte[] blob = (byte[])com.ExecuteScalar();
File.WriteAllBytes("C:\\" + "test.zip", blob);

Answer 1

Use DotNetZip , here is example .
using (ZipFile zip = new ZipFile())
{
zip.Password = pwd;
zip.AddFile(saveFileDialog1.FileName + ".xml");
zip.Save(saveFileDialog1.FileName + ".zip");
}
Additionally , I think you need to convert byte[] to string and then text file .
You can use convert.frombase64string method !
Edit
If you want to write byte[] to file , use this function ,
public bool ByteArrayToFile(string _FileName, byte[] _ByteArray)
{
try
{
System.IO.FileStream _FileStream =
new System.IO.FileStream(_FileName, System.IO.FileMode.Create,
System.IO.FileAccess.Write);
_FileStream.Write(_ByteArray, 0, _ByteArray.Length);
_FileStream.Close();
return true;
}
catch (Exception _Exception)
{
Console.WriteLine("Exception caught in process: {0}",
_Exception.ToString());
}
return false;
}
And call this function likes
com = new SqlCommand("SELECT BinFile FROM tbl_reports WHERE DBKey=411", conString);
byte[] blob = (byte[])com.ExecuteScalar();
ByteArrayToFile("C:\\test.txt",blob);