2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | FileStream fs= new FileStream( @"D:\6" ,FileMode.Open,FileAccess.Read); BinaryReader reader= new BinaryReader(fs); string fileclass= "" ; try { for ( int i=0;i<2;i++) { fileclass +=reader.ReadByte().ToString(); } } catch (Exception ex) { MessageBox.Show(ex.Message); } if (fileclass == "8075" ) { MessageBox.Show( "xlsx,zip,pptx,mmap,zip" ); } if (fileclass == "208207" ) { MessageBox.Show( "xls.doc.ppt" ); } if (fileclass == "4944" ) { MessageBox.Show( "csv" ); } fs.Close(); |
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | FileStream fs= new FileStream( @"D:\6" ,FileMode.Open,FileAccess.Read); BinaryReader reader= new BinaryReader(fs); string fileclass= "" ; try { for ( int i=0;i<2;i++) { fileclass +=reader.ReadByte().ToString(); } } catch (Exception ex) { MessageBox.Show(ex.Message); } if (fileclass == "8075" ) { MessageBox.Show( "xlsx,zip,pptx,mmap,zip" ); } if (fileclass == "208207" ) { MessageBox.Show( "xls.doc.ppt" ); } if (fileclass == "4944" ) { MessageBox.Show( "csv" ); } fs.Close(); |