C# – How to create multistyled cell with EPPlus library for Excel

cepplusexcelopenxml

I use EPPlus for Excel file generation.

I mean I need to convert HTML text (bold, italic, font color, name, size parameters) to Excel Cell. I suppose it needs to create the multi-styled cell, like:

cell text is "hello!"
the style I want is:

he - bold  
ll - italic  
o! - red colored font

or (more complex)

hello! - bold  
ll - italic (also bold)  
o! - red colored (also bold)

I know about MS OpenXML library (it allows me to do what I need). This is good but bit more complex library for implementation.

Best Answer

Solved! I can use that:

FileInfo fi = new FileInfo(@"c:\Book1.xlsx");

      using (ExcelPackage package = new ExcelPackage(fi))
      {
        // add a new worksheet to the empty workbook
        ExcelWorksheet worksheet = package.Workbook.Worksheets["Inv"];
        //Add the headers

        worksheet.Cells[2, 1].IsRichText = true;
        ExcelRichText ert = worksheet.Cells[2, 1].RichText.Add("bugaga");
        ert.Bold = true;
        ert.Color = System.Drawing.Color.Red;
        ert.Italic = true;

        ert = worksheet.Cells[2, 1].RichText.Add("alohaaaaa");
        ert.Bold = true;
        ert.Color = System.Drawing.Color.Purple;
        ert.Italic = true;

        ert = worksheet.Cells[2, 1].RichText.Add("mm");
        ert.Color = System.Drawing.Color.Peru;
        ert.Italic = false;
        ert.Bold = false;


        package.Save();
      }

Related Solutions

C# – How to cast int to enum

From an int:

YourEnum foo = (YourEnum)yourInt;

From a string:

YourEnum foo = (YourEnum) Enum.Parse(typeof(YourEnum), yourString);

// The foo.ToString().Contains(",") check is necessary for enumerations marked with an [Flags] attribute
if (!Enum.IsDefined(typeof(YourEnum), foo) && !foo.ToString().Contains(","))
{
    throw new InvalidOperationException($"{yourString} is not an underlying value of the YourEnum enumeration.")
}

Update:

From number you can also

YourEnum foo = (YourEnum)Enum.ToObject(typeof(YourEnum) , yourInt);

C# – How to create an Excel (.XLS and .XLSX) file in C# without installing Microsoft Office

You can use a library called ExcelLibrary. It's a free, open source library posted on Google Code:

ExcelLibrary

This looks to be a port of the PHP ExcelWriter that you mentioned above. It will not write to the new .xlsx format yet, but they are working on adding that functionality in.

It's very simple, small and easy to use. Plus it has a DataSetHelper that lets you use DataSets and DataTables to easily work with Excel data.

ExcelLibrary seems to still only work for the older Excel format (.xls files), but may be adding support in the future for newer 2007/2010 formats.

You can also use EPPlus, which works only for Excel 2007/2010 format files (.xlsx files). There's also NPOI which works with both.

There are a few known bugs with each library as noted in the comments. In all, EPPlus seems to be the best choice as time goes on. It seems to be more actively updated and documented as well.

Also, as noted by @АртёмЦарионов below, EPPlus has support for Pivot Tables and ExcelLibrary may have some support (Pivot table issue in ExcelLibrary)

Here are a couple links for quick reference:
ExcelLibrary - GNU Lesser GPL
EPPlus - GNU (LGPL) - No longer maintained
EPPlus 5 - Polyform Noncommercial - Starting May 2020
NPOI - Apache License

Here some example code for ExcelLibrary:

Here is an example taking data from a database and creating a workbook from it. Note that the ExcelLibrary code is the single line at the bottom:

//Create the data set and table
DataSet ds = new DataSet("New_DataSet");
DataTable dt = new DataTable("New_DataTable");

//Set the locale for each
ds.Locale = System.Threading.Thread.CurrentThread.CurrentCulture;
dt.Locale = System.Threading.Thread.CurrentThread.CurrentCulture;

//Open a DB connection (in this example with OleDB)
OleDbConnection con = new OleDbConnection(dbConnectionString);
con.Open();

//Create a query and fill the data table with the data from the DB
string sql = "SELECT Whatever FROM MyDBTable;";
OleDbCommand cmd = new OleDbCommand(sql, con);
OleDbDataAdapter adptr = new OleDbDataAdapter();

adptr.SelectCommand = cmd;
adptr.Fill(dt);
con.Close();

//Add the table to the data set
ds.Tables.Add(dt);

//Here's the easy part. Create the Excel worksheet from the data set
ExcelLibrary.DataSetHelper.CreateWorkbook("MyExcelFile.xls", ds);

Creating the Excel file is as easy as that. You can also manually create Excel files, but the above functionality is what really impressed me.

Best Answer

Related Solutions

C# – How to cast int to enum

C# – How to create an Excel (.XLS and .XLSX) file in C# without installing Microsoft Office

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