Fom the data grid view how to bind to the excel

Hope this example help you....

using System.ComponentModel;
private void btnGenerateExcel_Clickddd(object sender, EventArgs e)
{
// Start the BackgroundWorker.

backgroundWorker1.RunWorkerAsync();


// creating Excel Application
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 = false;

// 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 = "Inspection Order Detail";



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

// storing Each row and column value to excel sheet
for (int i = 0; i < dataGridView1.Rows.Count - 1; i++)
{
for (int j = 0; j < 3; j++)
{
worksheet.Cells[i + 2, j + 1] = dataGridView1.Rows[i].Cells[j].Value.ToString(); // in ur case you can give first three colums

}
}

// save the application
workbook.SaveAs("C:\\Users\\xxxxxx\\Desktop\\Temp\\output.xlsx", Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing);

// Exit from the application
app.Quit();

releaseObject(worksheet);

releaseObject(workbook);
releaseObject(app);

MessageBox.Show("Excel file created , you can find the file C:\\Users\\xxxxxxx\\Desktop\\Temp\\output.xlsx");
}