读取Excel文件的版本

读取xls文件和xlsx文件创建的版本号。

虽然xlsx声明的是向前兼容，但是不知道OleDb是不是也是这样，没有办法所以要读取文件版本，限定只能读取Excel2007保存的文件。

 using ICSharpCode.SharpZipLib.Zip;

 public const ushort BIFF8 = 0x0600;
 public const ushort BIFF7 = 0x0500;
 public static string GetExcelVersion(string fileName)
         {
             string version = string.Empty;
             try
             {
                 if (Path.GetExtension(fileName) == ".xls")
                 {
                     BinaryReader binReader = new BinaryReader(File.Open(fileName, FileMode.Open));
                     try
                     {
                         byte[] testArray = new byte[];
                         int count = binReader.Read(testArray, , );

                         if (count != )
                         {
                             // Reset the position in the stream to zero.
                             binReader.BaseStream.Seek(, SeekOrigin.Begin);
                             byte[] testArray2 = new byte[];
                             int count2 = binReader.Read(testArray2, , );
                             ushort BOF = binReader.ReadUInt16();
                             ushort Length = binReader.ReadUInt16();
                             ushort Version = binReader.ReadUInt16();
                             ushort file = binReader.ReadUInt16();
                             if (Version == BIFF8)
                             {
                                 version = "Excel8.0";
                             }
                             if (Version == BIFF7)
                             {
                                 version = "Excel8.0";
                             }
                         }
                     }
                     catch (EndOfStreamException e)
                     {
                         throw e;
                     }
                     finally
                     {
                         binReader.Close();
                     }
                 }
                 else if (Path.GetExtension(fileName) == ".xlsx")
                 {
                     ZipFile zip = new ZipFile(fileName);
                     try
                     {
                         IEnumerator entries = zip.GetEnumerator();
                         while (entries.MoveNext())
                         {
                             ZipEntry current = (ZipEntry)entries.Current;
                             if (current.Name.Equals("docProps/app.xml"))
                             {
                                 Stream stream = zip.GetInputStream(current);
                                 XPathNavigator navigator = new XPathDocument(stream).CreateNavigator();
                                 XmlNamespaceManager resolver = new XmlNamespaceManager(navigator.NameTable);
                                 resolver.AddNamespace("x", "http://schemas.openxmlformats.org/officeDocument/2006/extended-properties");
                                 XPathNodeIterator iterator = navigator.Select("//x:AppVersion", resolver);
                                 iterator.MoveNext();
                                 string attribute = iterator.Current.InnerXml;
                                 version = attribute;
                             }
                         }
                     }
                     catch (IOException ioEx)
                     {
                         throw ioEx;
                     }
                     finally
                     {
                         if (zip != null)
                         {
                             zip.Close();
                         }
                     }
                 }
             }
             catch (IOException ioEx)
             {
                 throw ioEx;
             }

             return version;
         }

调用：

   catch
                         {
                             try
                             {
                                 string version = GetExcelVersion(FilePath);
                                 string error = string.Empty;
                                 if (version == "")
                                 {
                                     error = "无法识别的Excel文件，请确保文件为有效的Excel2003或者Excel2007格式文件。";
                                 }
                                 else if (!version.Contains("") && !version.Contains("Excel8.0"))
                                 {
                                     error = string.Format("由高版本的Excel程序创建，请转换为Excel2003或者Excel2007格式文件", version);
                                 }
                                 throw new InvalidDataException(error);
                             }
                             catch (IOException ioEx)
                             {
                                 throw ioEx;
                             }
                         }