ListView数据导出成Excel

这个类能实现ListView数据导出成Excel的功能，但是还是有些美中不足，就是效率不是很好，如果数据量比较大的话，建议用其他方法，不过我也没有找到比较好的办法，哪位仁兄有好的方法记得共享一份给小弟，先谢谢啦。

ListView数据导出成Excel#region ListView数据导出成Excel
        /**//// <summary>
        /// ListView数据导出成Excel
        /// </summary>
        /// <param name="listviewname">ListView控件ID</param>
        public static void ExpToExcel(ListView listviewname)
        {
            if (listviewname.Items.Count == 0) return;
            Excel.Application excel = new Excel.Application();
            Excel.Workbooks workbooks = excel.Workbooks;   
            Excel.Workbook workbook = workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);
            Excel.Sheets worksheets = workbook.Worksheets;
            Excel.Worksheet sheet = (Excel.Worksheet) worksheets.get_Item(1);
            excel.Visible = true;

            Excel.Range range;
            excel.Cells.Select();
            excel.Cells.RowHeight = 30;
            excel.Cells.Font.Size = 10;
            excel.Cells.HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;  

            int rowPos = 2;
            range = excel.get_Range(sheet.Cells[rowPos,1],sheet.Cells[rowPos,1]);
            range.Select();

            for(int i=1;i<=listviewname.Columns.Count;i++)
            {
                range = excel.get_Range(sheet.Cells[rowPos,i],sheet.Cells[rowPos,i]);
                range.Borders.LineStyle = 1;
                range.Font.Name = "华文仿宋";
                range.Font.Size = 16;
                range.Font.Bold = true;
                range.HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
                range.ColumnWidth = 18;
                sheet.Cells[rowPos,i] = listviewname.Columns[i-1].Text.ToString();

            }
            rowPos++;

            foreach(ListViewItem item in listviewname.Items)
            {
                for(int i=1;i<=listviewname.Columns.Count;++i)
                {
                    range = excel.get_Range(sheet.Cells[rowPos,i],sheet.Cells[rowPos,i]);
                    range.Borders.LineStyle = 1;
                    range.Font.Name = "华文仿宋";
                    range.Font.Size = 12;
                    range.HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
//                    range.NumberFormat = Excel.xlColumnDataType.xlTextFormat ;
                    range.NumberFormat = Excel.XlParameterDataType.xlParamTypeUnknown ;
                    sheet.Cells[rowPos,i] = item.SubItems[i-1].Text;
                }
                rowPos++;
            }
            GC.Collect() ;
        }
        #endregion