c# -help in finding logical error in file stripping.

subashree · 2012-01-30T22:54:28+00:00

the following is a snippet for splitting the file(from parameter FileInputPath) into the number of splits(given as outputfiles) to the specified folder (FolderOUtputPath). the files are split.(my file s an image here). wen the image s split ..oli the first split has the stripped image...the other files r invalid. pls help me ... privatevoid SplitFile(string FileInputPath, string FolderOutputPath, intOutputFiles) { Byte[] byteSource = System.IO.File.ReadAllBytes(FileInputPath); FileInfo fiSource = newFileInfo(textBox1.Text); int partSize = (int)Math.Ceiling((double)(fiSource.Length / OutputFiles)); int fileOffset = 0; string currPartPath; FileStream fsPart; int sizeRemaining = (int)fiSource.Length; for (inti = 0; i < OutputFiles; i++) { currPartPath = FolderOutputPath + "\\" + String.Format(@"{0: D4}", i) + fiSource.Name; if (!File .Exists(currPartPath)) { fsPart = newFileStream(currPartPath, FileMode .CreateNew); sizeRemaining = ( int )fiSource.Length - (i * partSize); if (sizeRemaining < partSize) { partSize = sizeRemaining; } fsPart.Write(byteSource, fileOffset, partSize); fsPart.Close(); fileOffset += partSize; } }

c# -help in finding logical error in file stripping.

subashree

Member

Updated: Oct 14, 2024

Views: 1.0K

the following is a snippet for splitting the file(from parameter FileInputPath) into the number of splits(given as outputfiles) to the specified folder (FolderOUtputPath).
the files are split.(my file s an image here). wen the image s split ..oli the first split has the stripped image...the other files r invalid. pls help me ...

privatevoid SplitFile(string FileInputPath, string FolderOutputPath, intOutputFiles)
{

Byte[] byteSource = System.IO.File.ReadAllBytes(FileInputPath);

FileInfo fiSource = newFileInfo(textBox1.Text);

int partSize = (int)Math.Ceiling((double)(fiSource.Length / OutputFiles));

int fileOffset = 0;

string currPartPath;

FileStream fsPart;

int sizeRemaining = (int)fiSource.Length;

for (inti = 0; i < OutputFiles; i++)
{

currPartPath = FolderOutputPath +

"\\" + String.Format(@"{0: D4}", i) + fiSource.Name;

if (!File
.Exists(currPartPath))
{
fsPart =

newFileStream(currPartPath, FileMode
.CreateNew);
sizeRemaining = (

int
)fiSource.Length - (i * partSize);

if
(sizeRemaining < partSize)
{
partSize = sizeRemaining;
}
fsPart.Write(byteSource, fileOffset, partSize);
fsPart.Close();
fileOffset += partSize;
}
}

0

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PraveenKumar Purushothaman

Member • Feb 2, 2012

Is the first image a full one? I don't think so... If that shouldn't be a full one, then the rest are missing their headers. So, just prepend the headers to the rest of the files and check it out... 😀

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subashree

Member • Feb 4, 2012

Praveen-Kumar
Is the first image a full one? I don't think so... If that shouldn't be a full one, then the rest are missing their headers. So, just prepend the headers to the rest of the files and check it out... 😀
no...i dont get wat u r trying to say...wen i run this code the input image file s supposed to b stripped...wen i give the number of splits as 3(say) then the first splitted image has the stripped image(1/3rd of the image..remaining ll be blank) but the other files should hav the remaining part of the image..but it s an invalid...my doubt is if the snippet works for first iteration it should do for the rest too...

and wad did u mean by sayib add headers

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PraveenKumar Purushothaman

Member • Feb 4, 2012

This was the frames I was talking about... Did you miss the PNG Signature in the rest of the frames???

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