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读取excel文件显示在gridview中数据.字符.数字混合时无法全部读取的问题！

2008-01-12 16:27 1261 查看

Excel
This is a compiled connection strings reference list on how to connect to Excel.
ODBC

Standard



Driver={Microsoft Excel Driver (*.xls)};DriverId=790;Dbq=C:/MyExcel.xls;DefaultDir=c:/mypath;
SQL syntax "SELECT * FROM [sheet1$]". I.e. excel worksheet name followed by a "$" and wrapped in "[" "]" brackets.
OLE DB
Standard
Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:/MyExcel.xls;Extended Properties="Excel 8.0;HDR=Yes;IMEX=1";

Important note!
The quota " in the string needs to be escaped using your language specific escape syntax.
c#, c++ /"
VB6, VBScript ""
xml (web.config etc) "
or maybe use a single quota '.
"HDR=Yes;" indicates that the first row contains columnnames, not data. "HDR=No;" indicates the opposite.
"IMEX=1;" tells the driver to always read "intermixed" (numbers, dates, strings etc) data columns as text. Note that this option might affect excel sheet write access negative.
SQL syntax "SELECT * FROM [sheet1$]". I.e. excel worksheet name followed by a "$" and wrapped in "[" "]" brackets.
Check out the [HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Jet/4.0/Engines/Excel] located registry REG_DWORD "TypeGuessRows". That's the key to not letting Excel use only the first 8 rows to guess the columns data type. Set this value to 0 to scan all rows. This might hurt performance.
If the Excel workbook is protected by a password, you cannot open it for data access, even by supplying the correct password with your connection string. If you try, you receive the following error message: "Could not decrypt file."
Sarah Ding Note:


"IMEX=1;" tells the driver to always read "intermixed" data columns as text
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