问题
I have a .Net-Windows application in C#. I need to open an excel and process it. How can I do this without using Microsoft.Office.Interop.Excel libraries?
回答1:
var fileName = @"C:\ExcelFile.xlsx";
var connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileName + ";Extended Properties=\"Excel 12.0;IMEX=1;HDR=NO;TypeGuessRows=0;ImportMixedTypes=Text\""; ;
using (var conn = new OleDbConnection(connectionString))
{
conn.Open();
var sheets = conn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
using (var cmd = conn.CreateCommand())
{
cmd.CommandText = "SELECT * FROM [" + sheets.Rows[0]["TABLE_NAME"].ToString() + "] ";
var adapter = new OleDbDataAdapter(cmd);
var ds = new DataSet();
adapter.Fill(ds);
}
}
回答2:
I highly recommend CSharpJExcel for reading Excel 97-2003 files (xls) and ExcelPackage for reading Excel 2007/2010 files (Office Open XML format, xlsx).
They both work perfectly. They have absolutely no dependency on anything.
Sample using CSharpJExcel:
Workbook workbook = Workbook.getWorkbook(new System.IO.FileInfo(fileName));
var sheet = workbook.getSheet(0);
...
var content = sheet.getCell(colIndex, rowIndex).getContents();
...
workbook.close();
Sample using ExcelPackage:
using (ExcelPackage xlPackage = new ExcelPackage(existingFile))
{
// get the first worksheet in the workbook
ExcelWorksheet worksheet = xlPackage.Workbook.Worksheets[1];
int iCol = 2; // the column to read
// output the data in column 2
for (int iRow = 1; iRow < 6; iRow++)
Console.WriteLine("Cell({0},{1}).Value={2}", iRow, iCol,
worksheet.Cell(iRow, iCol).Value);
// output the formula in row 6
Console.WriteLine("Cell({0},{1}).Formula={2}", 6, iCol,
worksheet.Cell(6, iCol).Formula);
} // the using statement calls Dispose() which closes the package.
EDIT:
There is another project, ExcelDataReader, that seems to have the ability to handle both formats. It is also easy like the other ones I've mentioned.
There are also other libraries:
NPOI: Port of the Apache POI library to .NET:
Very powerfull, free, and open source. In addition to Excel (97-2010) it also supports Word and PowerPoint files.ExcelLibrary:
It only support Excel 97-2003 (xls) files.EPPlus:
An extension to ExcelPackage. Easier to use (I guess).
回答3:
I would urge against using OleDB, especially if its going to be run on a server. Its likely to cost you more in the long run - eg we had a SSIS job calling a Stored Procedure with the OleDB reading an excel file in the sptroc and kept crashing the SQL box! I took the OleDB stuff out of the sproc and it stopped crashing the server.
A better method I've found is to do it with Office 2003 and the XML files - in respect of Considerations for server-side Automation of Office. Note: Office 2003 is a minimum requirement for this to fly:
Ref for reading from Excel: http://www.roelvanlisdonk.nl/?p=924 (please do more research to find other examples)
Ref for writing a Excel spreadsheet: http://weblogs.asp.net/jgaylord/archive/2008/08/11/use-linq-to-xml-to-generate-excel-documents.aspx
public void ReadExcelCellTest()
{
XDocument document = XDocument.Load(@"C:\BDATA\Cars.xml");
XNamespace workbookNameSpace = @"urn:schemas-microsoft-com:office:spreadsheet";
// Get worksheet
var query = from w in document.Elements(workbookNameSpace + "Workbook").Elements(workbookNameSpace + "Worksheet")
where w.Attribute(workbookNameSpace + "Name").Value.Equals("Settings")
select w;
List<XElement> foundWoksheets = query.ToList<XElement>();
if (foundWoksheets.Count() <= 0) { throw new ApplicationException("Worksheet Settings could not be found"); }
XElement worksheet = query.ToList<XElement>()[0];
// Get the row for "Seat"
query = from d in worksheet.Elements(workbookNameSpace + "Table").Elements(workbookNameSpace + "Row").Elements(workbookNameSpace + "Cell").Elements(workbookNameSpace + "Data")
where d.Value.Equals("Seat")
select d;
List<XElement> foundData = query.ToList<XElement>();
if (foundData.Count() <= 0) { throw new ApplicationException("Row 'Seat' could not be found"); }
XElement row = query.ToList<XElement>()[0].Parent.Parent;
// Get value cell of Etl_SPIImportLocation_ImportPath setting
XElement cell = row.Elements().ToList<XElement>()[1];
// Get the value "Leon"
string cellValue = cell.Elements(workbookNameSpace + "Data").ToList<XElement>()[0].Value;
Console.WriteLine(cellValue);
}
回答4:
I recently found this library that converts an Excel workbook file into a DataSet: Excel Data Reader
回答5:
If you need to open XLS files rather than XLSX files, http://npoi.codeplex.com/ is a great choice. We've used it to good effect on our projects.
回答6:
Look for GSpread.NET. It's also an OpenSource project and it doesn't require Office installed. You can work with Google Spreadsheets by using API from Microsoft Excel. If you want to re-use the old code to get access to Google Spreadsheets, GSpread.NET is the best way. You need to add a few row:
Set objExcel = CreateObject("GSpreadCOM.Application")
// Name - User name, any you like
// ClientIdAndSecret - `client_id|client_secret` format
// ScriptId - Google Apps script ID
app.MailLogon(Name, ClientIdAndSecret, ScriptId);
Further code remain unchanged.
http://scand.com/products/gspread/index.html
回答7:
You can try OleDB to read data from excel file. Please try as follow..
DataSet ds_Data = new DataSet();
OleDbConnection oleCon = new OleDbConnection();
string strExcelFile = @"C:\Test.xlsx";
oleCon.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + strExcelFile + ";Extended Properties=\"Excel 12.0;IMEX=1;HDR=NO;TypeGuessRows=0;ImportMixedTypes=Text\"";;
string SpreadSheetName = "";
OleDbDataAdapter Adapter = new OleDbDataAdapter();
OleDbConnection conn = new OleDbConnection(sConnectionString);
string strQuery;
conn.Open();
int workSheetNumber = 0;
DataTable ExcelSheets = conn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
SpreadSheetName = ExcelSheets.Rows[workSheetNumber]["TABLE_NAME"].ToString();
strQuery = "select * from [" + SpreadSheetName + "] ";
OleDbCommand cmd = new OleDbCommand(strQuery, conn);
Adapter.SelectCommand = cmd;
DataSet dsExcel = new DataSet();
Adapter.Fill(dsExcel);
conn.Close();
回答8:
I have used Excel.dll library which is:
- open source
- lightweight
- fast
- compatible with xls and xlsx
The documentation available over here: https://exceldatareader.codeplex.com/
Strongly recommendable.
回答9:
Ive just been searching for a solution and come across Spreadsheetlight
which looks very promising. Its open source and available as a nuget package.
回答10:
If you don't wish to use interop, you may want to try out OfficeWriter. Depending on how much processing you really need to do on the file, it might be overkill though. You can request a free trial. There's a fully documented api available at the documentation site.
DISCLAIMER: I'm one of the engineers who built the latest version.
回答11:
You could also do what I do and by a commercial control like this one: http://www.syncfusion.com/products/reporting-edition/xlsio
I have been struging for years before ending with a commercial solution. I first tried the OLEDB approach that is very easy to use in my development environment but can be a knightmare to deploy. Then I tried the open source solutions but most of the are outdated and have bad support.
The xlsio controls from syncfusion are just the ones I use and are happy with but others exists. If you can affort it, do not hesitate, it's the best solution. Why? Because it has no dependencies with the system and supports all version of office right away. Among other advantages like, it's really fast.
And no, I do not work for synfusion ;)
来源：https://stackoverflow.com/questions/9155642/how-to-read-an-excel-file-in-c-sharp-without-using-microsoft-office-interop-exce