c# - How to export dataGridView data Instantly to Excel on button click?

Question

I have 10k rows and 15 column in my data grid view. I want to export this data to an excel sheet o button click. I have already tried with the below code.

private void btExport_Click(object sender, EventArgs e)
    {
        Microsoft.Office.Interop.Excel._Application app  = new Microsoft.Office.Interop.Excel.Application();
        Microsoft.Office.Interop.Excel._Workbook workbook =  app.Workbooks.Add(Type.Missing);        
        Microsoft.Office.Interop.Excel._Worksheet worksheet = null;                   
        app.Visible = true;
        worksheet = workbook.Sheets["Sheet1"];
        worksheet = workbook.ActiveSheet;                  
        for(int i=1;i<dataGridView1.Columns.Count+1;i++)
        {
             worksheet.Cells[1, i] = dataGridView1.Columns[i-1].HeaderText;
        }    
        for (int i=0; i < dataGridView1.Rows.Count-1 ; i++)
        {
            for(int j=0;j<dataGridView1.Columns.Count;j++)
            {
                if (dataGridView1.Rows[i].Cells[j].Value != null)
                {
                    worksheet.Cells[i + 2, j + 1] = dataGridView1.Rows[i].Cells[j].Value.ToString();
                }
                else
                {
                    worksheet.Cells[i + 2, j + 1] = "";
                }
            }
        }
    }

This is working for me but it is taking lots of time to complete exporting process.

Is it possible to export from dataGridView (with 10k rows)to excel instantly on a button click?

Other than this, when I tried copy all dataGridview contents to clip board and then paste it to excel sheet manually, it happen almost instantly.

So is there a way to copy all dataGridView cells to clip board and paste it to excel sheet(with cell formatting) on a button click?

I have code for copy to clipboard as below, but I don't know how to paste it in to a new excel sheet by opening it.

        private void copyAllToolStripMenuItem_Click(object sender, EventArgs e)
    {
        dataGridView1.SelectAll();
        DataObject dataObj = dataGridView1.GetClipboardContent();
        if (dataObj != null)
            Clipboard.SetDataObject(dataObj);
    }

Please help with an example. I am new to C#.

Answer 1

I solved this by simple copy and paste method. I don't know it is the best way to do this but,for me it works good and almost instantaneously. Here is my code.

    private void copyAlltoClipboard()
    {
        dataGridView1.SelectAll();
        DataObject dataObj = dataGridView1.GetClipboardContent();
        if (dataObj != null)
            Clipboard.SetDataObject(dataObj);
    }
    private void button3_Click_1(object sender, EventArgs e)
    {
        copyAlltoClipboard();
        Microsoft.Office.Interop.Excel.Application xlexcel;
        Microsoft.Office.Interop.Excel.Workbook xlWorkBook;
        Microsoft.Office.Interop.Excel.Worksheet xlWorkSheet;
        object misValue = System.Reflection.Missing.Value;
        xlexcel = new Excel.Application();
        xlexcel.Visible = true;
        xlWorkBook = xlexcel.Workbooks.Add(misValue);
        xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
        Excel.Range CR = (Excel.Range)xlWorkSheet.Cells[1, 1];
        CR.Select();
        xlWorkSheet.PasteSpecial(CR, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, true);          
    }

Thanks.