How Do I Two Datagridview Data Into One Excelsheet In C# Window Appliaction

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C#5.0

i have 2 datagridview and its data tranfer to one excel sheet how i can do that Single datagridview data i transfer like that :

Microsoft.Office.Interop.Excel._Application app = new Microsoft.Office.Interop.Excel.Application();


// creating new WorkBook within Excel application
Microsoft.Office.Interop.Excel._Workbook workbook = app.Workbooks.Add(Type.Missing);


// creating new Excelsheet in workbook
Microsoft.Office.Interop.Excel._Worksheet worksheet = null;

// see the excel sheet behind the program
app.Visible = true;

// get the reference of first sheet. By default its name is Sheet1.
// store its reference to worksheet
worksheet = workbook.Sheets["Sheet1"];
worksheet = workbook.ActiveSheet;

// changing the name of active sheet
worksheet.Name = "Exported from gridview";


// storing header part in Excel
for (int i = 1; i < dataGridView1.Columns.Count + 1; i++)
{
worksheet.Cells[1, i] = dataGridView1.Columns[i - 1].HeaderText;
}



// storing Each row and column value to excel sheet
for (int i = 0; i < dataGridView1.Rows.Count - 1; i++)
{
for (int j = 0; j < dataGridView1.Columns.Count; j++)
{
worksheet.Cells[i + 2, j + 1] = dataGridView1.Rows[i].Cells[j].Value.ToString();
}
}


// save the application
workbook.SaveAs("Kaplesh:\\sumit.xls", Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing);


}