C# DataGridView 내용을 Excel로 내보내기

C#의 DataGridView의 내용을 Excel 로 내보내는 방법입니다.

using System; 
using System.Reflection; 
using System.Windows.Forms; 
private void Export2Excel(DataGridView datagridview, bool captions) 
{ 
	object objApp_Late; 
	object objBook_Late; 
	object objBooks_Late; 
	object objSheets_Late; 
	object objSheet_Late; 
	object objRange_Late; 
	object[] Parameters; 
	string[] headers = new string[datagridview.ColumnCount]; 
	string[] columns = new string[datagridview.ColumnCount]; 

	int i = 0; 
	int c = 0; 
	for (c = 0; c < datagridview.ColumnCount; c++) 
	{ 
		headers[c] = datagridview.Rows[0].Cells[c].OwningColumn.HeaderText.ToString(); 
		i = c + 65; 
		columns[c] = Convert.ToString((char)i); 
	} 

	try 
	{ 
		// Get the class type and instantiate Excel. 
		Type objClassType; 
		objClassType = Type.GetTypeFromProgID("Excel.Application"); 
		objApp_Late = Activator.CreateInstance(objClassType); 
		//Get the workbooks collection. 
		objBooks_Late = objApp_Late.GetType().InvokeMember("Workbooks", 
			BindingFlags.GetProperty, null, objApp_Late, null); 
		//Add a new workbook. 
		objBook_Late = objBooks_Late.GetType().InvokeMember("Add", 
			BindingFlags.InvokeMethod, null, objBooks_Late, null); 
		//Get the worksheets collection. 
		objSheets_Late = objBook_Late.GetType().InvokeMember("Worksheets", 
			BindingFlags.GetProperty, null, objBook_Late, null); 
		//Get the first worksheet. 
		Parameters = new Object[1]; 
		Parameters[0] = 1; 
		objSheet_Late = objSheets_Late.GetType().InvokeMember("Item", 
			BindingFlags.GetProperty, null, objSheets_Late, Parameters); 

		if (captions) 
		{ 
			// Create the headers in the first row of the sheet 
			for (c = 0; c < datagridview.ColumnCount; c++) 
			{ 
				//Get a range object that contains cell. 
				Parameters = new Object[2]; 
				Parameters[0] = columns[c] + "1"; 
				Parameters[1] = Missing.Value; 
				objRange_Late = objSheet_Late.GetType().InvokeMember("Range", 
					BindingFlags.GetProperty, null, objSheet_Late, Parameters); 
				//Write Headers in cell. 
				Parameters = new Object[1]; 
				Parameters[0] = headers[c]; 
				objRange_Late.GetType().InvokeMember("Value", BindingFlags.SetProperty, 
					null, objRange_Late, Parameters); 
			} 
		} 

		// Now add the data from the grid to the sheet starting in row 2 
		for (i = 0; i < datagridview.RowCount; i++) 
		{ 
			for (c = 0; c < datagridview.ColumnCount; c++) 
			{ 
				//Get a range object that contains cell. 
				Parameters = new Object[2]; 
				Parameters[0] = columns[c] + Convert.ToString(i + 2); 
				Parameters[1] = Missing.Value; 
				objRange_Late = objSheet_Late.GetType().InvokeMember("Range", 
					BindingFlags.GetProperty, null, objSheet_Late, Parameters); 
				//Write Headers in cell. 
				Parameters = new Object[1]; 
				Parameters[0] = datagridview.Rows[i].Cells[c].Value.ToString(); 
				objRange_Late.GetType().InvokeMember("Value", BindingFlags.SetProperty, 
					null, objRange_Late, Parameters); 
			} 
		} 

		//Return control of Excel to the user. 
		Parameters = new Object[1]; 
		Parameters[0] = true; 
		objApp_Late.GetType().InvokeMember("Visible", BindingFlags.SetProperty, 
			null, objApp_Late, Parameters); 
		objApp_Late.GetType().InvokeMember("UserControl", BindingFlags.SetProperty, 
			null, objApp_Late, Parameters); 
	} 
	catch (Exception theException) 
	{ 
		String errorMessage; 
		errorMessage = "Error: "; 
		errorMessage = String.Concat(errorMessage, theException.Message); 
		errorMessage = String.Concat(errorMessage, " Line: "); 
		errorMessage = String.Concat(errorMessage, theException.Source); 

		MessageBox.Show(errorMessage, "Error"); 
	} 
}