Reading Excel data and cell formatting in C#

Question

I am looking for a library that allows me to read an Excel document in C#, but I am needing to be able to read the cell formatting as well as the data in the spreadsheet. I found this useful question that lists a lot of different alternatives for reading Excel documents, but a lot of the solutions offered here only allow the content of the spreadsheet to be read, not the cell properties (eg font, background colour, etc). For my particular problem, though, I am needing to read a document that contains a lot of cell formatting and I need to be able to read this formatting information.

The Excel document that I am needing to reading is an xls document, so I do not need to read xlsx at this stage. I am looking for a library that can be used on a server without Excel being installed, so it must be a standalone solution and preferably open-source.

Does anyone have experience with reading cell formatting information from an xls document and can suggest a library that will help accomplish this task?

UPDATE:

I am looking at using ClosedXml because from what I have read about it, it seems to provide the functionality that I am needing. I am working from this sample code:

http://closedxml.codeplex.com/wikipage?title=Finding%20and%20extracting%20the%20data&referringTitle=Documentation

and have been able to read the content of a Excel document without issues. I have used just the Categories example from this code, but have formatted two of the categoryname cells to have background colours. Now what I am trying to do with ClosedXml is determine:

• if a Fill background colour has been defined on a specific cell

• if it has been defined, retrieve the colour of the Fill (hex value will do)

Here is some code that I have tried to use:

// Get all categories
while (!categoryRow.Cell(coCategoryId).IsEmpty())
{
    IXLCell categoryName = categoryRow.Cell(coCategoryName);
    try
    {
        categories.Add(categoryName.GetString() + " " + categoryName.Style.Fill.BackgroundColor.Color.ToHex());
    }
    catch
    {
        categories.Add(categoryName.GetString() + " None");
    }
    categoryRow = categoryRow.RowBelow();
}

But the code

categoryName.Style.Fill.BackgroundColor.Color.ToHex()

always throws the expection "The given key was not present in the dictionary." , even for cells that do have background colours defined. Anyone have any ideas how to get this working with ClosedXml?

Answer 1

OpenXml及其包装器ClosedXml为您提供了许多有用的功能。

Answer 2

如果不需要免费，我强烈推荐Aspose.Cells

Answer 3

I am partly dodging your requirements but you could convert xls->xlsx on the server and then search (XPath) the XML. Maybe xls->openoffice calc could do approximately the same.

Answer 4

you can use Microsoft.Office.Interop.Excel

var workbookPath = "";
var worksheetName = "";

var applicationClass = new Application();
var workbook = applicationClass.Workbooks.Open(workbookPath, Type.Missing, Type.Missing,     Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing , Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);

var worksheet = workbook.GetWorksheet(worksheetName);
var usedRange = worksheet.UsedRange;
var columnRangeIndexColumn= 1;


            for (int i = beginIndexRow; i <= usedRange.Rows.Count; i++)
            {
                var columnRange = usedRange.Cells[i, columnRangeIndexColumn];
                var value= columnRange.Value2;
             }




use this extension

public static Worksheet GetWorksheet(this Workbook value, string name)
        {
            foreach (Worksheet worksheet in value.Worksheets)
            {
                if (worksheet.Name == name)
                {
                    return worksheet;
                }
            }
            return value.ActiveSheet;
        }