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。

 1 using ICSharpCode.SharpZipLib.Zip;  2 

 3 public const ushort BIFF8 = 0x0600;  4 public const ushort BIFF7 = 0x0500;  5 public static string GetExcelVersion(string fileName)  6  {  7             string version = string.Empty;  8             try

 9  { 10                 if (Path.GetExtension(fileName) == ".xls") 11  { 12                     BinaryReader binReader = new BinaryReader(File.Open(fileName, FileMode.Open)); 13                     try

14  { 15                         byte[] testArray = new byte[2]; 16                         int count = binReader.Read(testArray, 0, 2); 17 

18                         if (count != 0) 19  { 20                             // Reset the position in the stream to zero.

21                             binReader.BaseStream.Seek(0, SeekOrigin.Begin); 22                             byte[] testArray2 = new byte[512]; 23                             int count2 = binReader.Read(testArray2, 0, 512); 24                             ushort BOF = binReader.ReadUInt16(); 25                             ushort Length = binReader.ReadUInt16(); 26                             ushort Version = binReader.ReadUInt16(); 27                             ushort file = binReader.ReadUInt16(); 28                             if (Version == BIFF8) 29  { 30                                 version = "Excel8.0"; 31  } 32                             if (Version == BIFF7) 33  { 34                                 version = "Excel8.0"; 35  } 36  } 37  } 38                     catch (EndOfStreamException e) 39  { 40                         throw e; 41  } 42                     finally

43  { 44  binReader.Close(); 45  } 46  } 47                 else if (Path.GetExtension(fileName) == ".xlsx") 48  { 49                     ZipFile zip = new ZipFile(fileName); 50                     try

51  { 52                         IEnumerator entries = zip.GetEnumerator(); 53                         while (entries.MoveNext()) 54  { 55                             ZipEntry current = (ZipEntry)entries.Current; 56                             if (current.Name.Equals("docProps/app.xml")) 57  { 58                                 Stream stream = zip.GetInputStream(current); 59                                 XPathNavigator navigator = new XPathDocument(stream).CreateNavigator(); 60                                 XmlNamespaceManager resolver = new XmlNamespaceManager(navigator.NameTable); 61                                 resolver.AddNamespace("x", "http://schemas.openxmlformats.org/officeDocument/2006/extended-properties"); 62                                 XPathNodeIterator iterator = navigator.Select("//x:AppVersion", resolver); 63  iterator.MoveNext(); 64                                 string attribute = iterator.Current.InnerXml; 65                                 version = attribute; 66  } 67  } 68  } 69                     catch (IOException ioEx) 70  { 71                         throw ioEx; 72  } 73                     finally

74  { 75                         if (zip != null) 76  { 77  zip.Close(); 78  } 79  } 80  } 81  } 82             catch (IOException ioEx) 83  { 84                 throw ioEx; 85  } 86 

87             return version; 88         }

View Code

调用：

 1   catch

 2                         {

 3                             try

 4                             {

 5                                 string version = GetExcelVersion(FilePath);

 6                                 string error = string.Empty;

 7                                 if (version == "")

 8                                 {

 9                                     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。";

10                                 }

11                                 else if (!version.Contains("12") && !version.Contains("Excel8.0"))

12                                 {

13                                     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);

14                                 }

15                                 throw new InvalidDataException(error);

16                             }

17                             catch (IOException ioEx)

18                             {

19                                 throw ioEx;

20                             }

21                         }

View Code