Comments on: How to check if a file is compressed in C# http://blog.somecreativity.com/2008/04/08/how-to-check-if-a-file-is-compressed-in-c/ Weblog of Siddharth Uppal Sun, 21 Feb 2010 10:50:19 +0000 http://wordpress.com/ hourly 1 By: Sid http://blog.somecreativity.com/2008/04/08/how-to-check-if-a-file-is-compressed-in-c/#comment-4705 Sid Tue, 30 Sep 2008 00:17:12 +0000 http://siddhu.wordpress.com/?p=466#comment-4705 It seems you're attempting to use this code in an ASP.NET app. Make sure your ASP.NET account has adequate permissions to write to the location where you're attempting to save the received file. It seems you’re attempting to use this code in an ASP.NET app. Make sure your ASP.NET account has adequate permissions to write to the location where you’re attempting to save the received file.

]]> By: dnzsahin http://blog.somecreativity.com/2008/04/08/how-to-check-if-a-file-is-compressed-in-c/#comment-4704 dnzsahin Tue, 16 Sep 2008 11:39:04 +0000 http://siddhu.wordpress.com/?p=466#comment-4704 hi, I have cange this to /////////////////////////////////////////////////////////////////// public string CheckSignature(Stream fs, int signatureSize) { StreamReader Reader = new StreamReader(fs); using (fs) { if (fs.Length 0) { int bytesRead = fs.Read(signature, index, signatureSize); signatureSize -= bytesRead; index += bytesRead; } fs.Dispose(); return BitConverter.ToString(signature); } } /////////////////////////////////////////////////////// and i call CheckSignature as if (CheckSignature(MyUploadedFile.PostedFile.InputStream, 4) == "89-50-4E-47") { // save MyPostedFile to directory } when i send a jpeg file if (CheckSignature(MyUploadedFile.PostedFile.InputStream, 4) == "89-50-4E-47") is true my question is.. why i can't save MyPostedFile hi,

I have cange this to
///////////////////////////////////////////////////////////////////
public string CheckSignature(Stream fs, int signatureSize)
{
StreamReader Reader = new StreamReader(fs);
using (fs)
{
if (fs.Length 0)
{
int bytesRead = fs.Read(signature, index, signatureSize);
signatureSize -= bytesRead;
index += bytesRead;
}
fs.Dispose();

return BitConverter.ToString(signature);
}
}
///////////////////////////////////////////////////////
and i call CheckSignature as

if (CheckSignature(MyUploadedFile.PostedFile.InputStream, 4) == “89-50-4E-47″)
{
// save MyPostedFile to directory
}

when i send a jpeg file
if (CheckSignature(MyUploadedFile.PostedFile.InputStream, 4) == “89-50-4E-47″) is true

my question is..

why i can’t save MyPostedFile

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