Modifying Excel spreadsheet with .NET
Here\'s the problem:
I have to modify an existing Excel spreadsheet using .NET. The spreadsheet is hugely complex, and I just have to add data in some predefined ar
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Have a look at
Excel Web Access, which is part of Excel Services in MOSS, a server-side version of Excel that lets you calculate and display your Excel information through a Web browser. The MOSS overview page describes the sharepoint framework that can provide Excel functionality on the server. You can use the VSTO API to programmatically access spreadsheets.讨论(0) -
Check out MyXls a .NET solution for reading and writing binary XLS files.
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I've used Aspose.Cells for this sort of thing with good success. The documentation can be a little obtuse, but the product seems to work. It won't require you to have Excel on the server and it works with the latest versions of Excel (and previous versions).
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You may want to take a look at http://www.gemboxsoftware.com/GBSpreadsheetFree.htm.
They have a free version with all features but limited to 150 rows per sheet and 5 sheets per workbook, if that falls within your needs, otherwise the paid version starts at $425 for a 1 Developer License.
There are additional answers that may apply to your question at StackOverflow: Create Excel (.XLS and .XLSX) file from C#.
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The problem with using Excel as an ISAM database using any driver (ODBC, OLEDB., etc.) is the datatype of the column is based on the first 8 rows in the column - this is pure evil; for example: if a column is something like a part# and the first 8 parts happen to be only numeric then you get get NULL for any cell in that column where the part# isn't numeric. (110000 vs 111000-1 or 111000A). This is reguardless of how you format the column in excel (even if you set the column as text).
I'll try and find a doc on this and update. Here's one:
http://support.microsoft.com/kb/194124
http://msdn.microsoft.com/en-us/library/bb177610.aspx
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You have still few solutions. 1) Third party component for excel files. ( i think this is most pain-les & reliable solution ) 2) Using html-table.
1) Simply look at internet :) 2) The excel works pretty fine with html-tables. If you generate this html:
<html><body> <table> <tr><td><b>Column A</b></td><td><b>Column B</b></td></tr> <tr><td><font color="red">-154</b></td><td><font size="5">hello world</font></td></tr> </table> </body></html>the excel will show it as worksheet as you formated it. I think, this is most universal way, how to create "rich" excel worksheet in internet enviroment without having excel instaled on server.
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