Load file from stream Leave feedback
There might be a case when your file is not physically located on the disk. Instead, you have the file in the form of a stream. In this case, to avoid the overhead of saving the stream as a file on disk, GroupDocs.Conversion enables you to convert the file streams directly.
To load a file from a stream, follow these steps:
- Specify the method to obtain the file stream.
- Pass the method’s name to the Converter class constructor.
The following code snippet serves this purpose:
public static void Run()
{
// Pass the source stream as parameter
using (Converter converter = new Converter(GetFileStream))
{
PdfConvertOptions options = new PdfConvertOptions();
converter.Convert("converted.pdf", options);
}
}
// Obtain the stream for the source file
private static Stream GetFileStream() => File.OpenRead("sample.docx");
The snippet above uses the FileStream class instance. Similarly, you can use any other type of stream. Just make sure that the source stream contains any of the supported file formats. For example, the following code loads a file using the MemoryStream class instance:
public static void Run()
{
// Pass the source stream as parameter
using (Converter converter = new Converter(GetMemoryStream))
{
PdfConvertOptions options = new PdfConvertOptions();
converter.Convert("converted.pdf", options);
}
}
// Obtain the stream for the source file
private static Stream GetMemoryStream()
{
MemoryStream memStream = new MemoryStream();
using (FileStream fStream = File.Open("sample.docx", FileMode.Open))
{
fStream.CopyTo(memStream);
}
return memStream;
}
When loading files from a stream, you may not know beforehand the exact types of files you are receiving. However, to find out this and other information about the source file, you can use the Converter.GetDocumentInfo() method, as described in the Getting document info article.
The following code displays the format of the source file loaded from a stream:
public static void Run()
{
// Pass the source stream as parameter
using (Converter converter = new Converter(GetFileStream))
{
IDocumentInfo docInfo = converter.GetDocumentInfo();
Console.WriteLine("Source file format: {0}", docInfo.Format);
PdfConvertOptions options = new PdfConvertOptions();
converter.Convert("converted.pdf", options);
}
}
// Obtain the stream for the source file
private static Stream GetFileStream() => File.OpenRead("sample.docx");
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