Merge cells using EPPlus?

I'm using the EPPlus library to read/write Excel files: http://epplus.codeplex.com/

I'm trying to simply merge some cells when writing a document:

using (ExcelPackage pck = new ExcelPackage())
{
    //Create the worksheet
    ExcelWorksheet ws = pck.Workbook.Worksheets.Add("Demo");

    //Format the header for column 1-3
    using (ExcelRange rng = ws.Cells["A1:C1"])
    {
        bool merge = rng.Merge;
    }
}

There's a property named Merge that simply returns true or false. I thought maybe that would Merge the cells, but it doesn't.

Anyone know how to do this?

Solution 1:

You have to use it like this:

ws.Cells["A1:C1"].Merge = true;

instead of:

using (ExcelRange rng = ws.Cells["A1:C1"])
{
    bool merge = rng.Merge;
}

Solution 2:

If you want to merge cells dynamically, you can also use:

worksheet.Cells[FromRow, FromColumn, ToRow, ToColumn].Merge = true;

All these variables are integers.

Solution 3:

You can create a extension method:

public static void Merge(this ExcelRangeBase range)
{
    ExcelCellAddress start = range.Start;
    ExcelCellAddress end = range.End;
    range.Worksheet.Cells[start.Row, start.Column, end.Row, end.Column].Merge = true;
}

You can use this as you would via interop:

range.Merge();