How to merge two excel files into one with their sheet names?

Question

For merging of two excel sheet, I am using below code.

using System;
using Excel = Microsoft.Office.Interop.Excel;
using System.Reflection; 

namespace MergeWorkBooks
{
    class Program
    {
        static void Main(string[] args)
        {
            Excel.Application app = new Excel.Application();

            app.Visible = true;
            app.Workbooks.Add("");
            app.Workbooks.Add(@"c:\MyWork\WorkBook1.xls");
            app.Workbooks.Add(@"c:\MyWork\WorkBook2.xls");


            for (int i = 2; i <= app.Workbooks.Count; i++)
            {
                int count = app.Workbooks[i].Worksheets.Count;

                app.Workbooks[i].Activate();
                for (int j=1; j <= count; j++)
                {
                    Excel._Worksheet ws = (Excel._Worksheet)app.Workbooks[i].Worksheets[j];
                    ws.Select(Type.Missing);
                    ws.Cells.Select();

                    Excel.Range sel = (Excel.Range)app.Selection;
                    sel.Copy(Type.Missing);

                    Excel._Worksheet sheet = (Excel._Worksheet)app.Workbooks[1].Worksheets.Add(
                    Type.Missing, Type.Missing, Type.Missing, Type.Missing
                    );

                    sheet.Paste(Type.Missing, Type.Missing);

                }
            }
        }
    }
}

This code is working good for me for merging excel workbook. But at the time of merging I am not getting the excel sheet names. Here I need that when the excel is merging at the same time the sheet names should also go to the merged excel sheet.

Solution

The following worked fine for me, including copying the name and where the name clashed it kindly even handled the Sheet1(2) etc.

Excel.Application app = new Excel.Application();
app.Visible = true;
app.Workbooks.Add("");
app.Workbooks.Add(@"c:\MyWork\WorkBook1.xls");
  app.Workbooks.Add(@"c:\MyWork\WorkBook2.xls");
for (int i = 2; i <= app.Workbooks.Count; i++)
{
    for (int j = 1; j <= app.Workbooks[i].Worksheets.Count;j++ )
    {
        Excel.Worksheet ws = app.Workbooks[i].Worksheets[j];
        ws.Copy(app.Workbooks[1].Worksheets[1]);
    }
}

Comments

[Tripati Subudhi]

When I am going to run this then I am getting below error. Compiler Error Message: CS0266: Cannot implicitly convert type 'object' to 'Microsoft.Office.Interop.Excel.Worksheet'. An explicit conversion exists (are you missing a cast?) And also it is saying "No overload for method 'Copy' takes '1' arguments"

[BugFinder]

Well, other than the name of the 2 workbooks to merge, that was my entire app. Im guessing they changed it in Office2010 then.

[William Humphries]

@TripatiSubudhi Did you end up finding a solution for this? Just using Excel.Worksheet ws = (Excel.Worksheet) app.Workbooks[i].Worksheets[j]; ?