Stream to PDF creates a corrupt or damaged file

Question

Stream to PDF creates a corrupt or damaged file

Ayar K 1

I am creating PDF files from stream:

using (Stream file = File.Create($"C:\test.pdf"))
{
CopyStream(myStream, file);
}
public static void CopyStream(Stream input, Stream output)
{
byte[] buffer = new byte[8 * 1024];
int len;
while ((len = input.Read(buffer, 0, buffer.Length)) > 0)
{
output.Write(buffer, 0, len);
}
}

The files created, but when i can't open it with any program, i get the message that file is not valid, or is corrupted.

What i am doing wrong here?

Thanks in advance

Anonymous

Hi @Ayar K , May I ask what you extracted from the stream? Is it a pdf?

About saving pdf stream as a pdf you can refer to this:

public static async Task SaveStreamAsFile(string filePath, System.Threading.Tasks.Task<Stream> inputStream, string fileName)  
{  
    var stream = await inputStream;  
    var path = Path.Combine(filePath, fileName);  
    var bytesInStream = new byte[stream.Length];  
  
    await stream.ReadAsync(bytesInStream, 0, (int) bytesInStream.Length);  
  
    using (var outputFileStream = new FileStream(path, FileMode.Create))  
    {  
       await outputFileStream.WriteAsync(bytesInStream, 0, bytesInStream.Length);  
    }  
}

Viorel 122.9K Reputation points

2022-10-25T09:39:12.233+00:00

Did you check if test.pdf looks like a valid PDF file using some binary viewers or editors? (You can use Visual Studio too). The PDF files usually start with "%PDF" and end with "%%EOF". Maybe your data were invalid.

Your answer

Anonymous

2022-10-25T09:36:57.11+00:00

Hi @Ayar K , May I ask what you extracted from the stream? Is it a pdf?

About saving pdf stream as a pdf you can refer to this:

public static async Task SaveStreamAsFile(string filePath, System.Threading.Tasks.Task<Stream> inputStream, string fileName) { var stream = await inputStream; var path = Path.Combine(filePath, fileName); var bytesInStream = new byte[stream.Length]; await stream.ReadAsync(bytesInStream, 0, (int) bytesInStream.Length); using (var outputFileStream = new FileStream(path, FileMode.Create)) { await outputFileStream.WriteAsync(bytesInStream, 0, bytesInStream.Length); } }
Viorel 122.9K Reputation points

2022-10-25T09:39:12.233+00:00

Did you check if test.pdf looks like a valid PDF file using some binary viewers or editors? (You can use Visual Studio too). The PDF files usually start with "%PDF" and end with "%%EOF". Maybe your data were invalid.

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Stream to PDF creates a corrupt or damaged file

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