How to copy an excel sheet from workbook A to workbook B

Question

I have the below code to copy Sheet1 from a workbook (test1.xlsx) to another workbook (test2.xlsx). The code doesn't have any errors and it takes forever to execute and I had to stop the code with no change in the files. Please let me know what is wrong.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Excel = Microsoft.Office.Interop.Excel;

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

            Excel.Workbook test1 = xlApp.Workbooks.Open(@"C:\Users\namokhtar\Desktop\test1.xlsx");

            Excel.Workbook test2 = xlApp.Workbooks.Open(@"C:\Users\namokhtar\Desktop\test2.xlsx");

            test2.Worksheets.Copy(test1.Worksheets["Sheet1"]);

            test2.Save();

            test1.Close();

            test2.Close();

            xlApp.Quit();

        }
    }
}

Answer 1

I think you need to specify where to copy the worksheet to. So at line

test2.Worksheets.Copy(test1.Worksheets["Sheet1"]);

you have to specify which worksheet in test2 you want to copy the worksheet in. test2.Worksheets["whateverworksheetyouwanttooverwrite"].Copy(test1.Worksheets["Sheet1"]);

Source: ( https://docs.microsoft.com/nl-nl/visualstudio/vsto/how-to-programmatically-copy-worksheets?view=vs-2017 )