Winform 导出Excel

 private void 导出excelToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (dgvData.RowCount > 0)
            {
                var saveFileDialog1 = new SaveFileDialog
                {
                    Filter = @"Excel文件(*.xls,*.xlsx)|*.xls;*.xlsx",
                    RestoreDirectory = true
                };

                if (saveFileDialog1.ShowDialog() == DialogResult.OK)
                {
                    var result = _excel.SetExportExcel(saveFileDialog1.FileName, dgvData, 2);
                    if (result != null)
                    {
                        MessageBox.Show(result.HasError ? "文件导出成功！！" : result.ErrorMessage);
                    }
                }
            }
            else
            {
                MessageBox.Show(@"数据为空!!");
            }
        }

        /// <summary>
        /// DataGridView 导出Excel方法
        /// </summary>
        /// <param name="fileName">导出路径</param>
        /// <param name="gridView">数据源</param>
        /// <param name="num">从第几列开始导</param>
        public Result SetExportExcel(string fileName, DataGridView gridView, int num)
        {
            var result = new Result();

            if (fileName.IndexOf(":") > 0)
            {
                Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();

                if (xlApp == null)
                {
                    result.ErrorMessage = "无法创建Excel对象，可能您的机子未安装Excel";
                    result.HasError = false;
                }
                Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;
                Microsoft.Office.Interop.Excel.Workbook workbook =
                    workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
                Microsoft.Office.Interop.Excel.Worksheet worksheet =
                    (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1]; //取得sheet1

                int a = 1, b = 1;
                for (var i = 0; i < gridView.RowCount; i++)
                {
                    if (i == 0)
                    {
                        for (var j = num; j < gridView.Columns.Count; j++)
                        {
                            worksheet.Cells[1, a] = gridView.Columns[j].HeaderText;
                            a++;
                        }
                    }
                    for (var j = num; j < gridView.Columns.Count; j++)
                    {
                        worksheet.Cells[i + 2, b] = gridView.Rows[i].Cells[j].Value;
                        b++;
                    }
                    b = 1;
                    System.Windows.Forms.Application.DoEvents();
                }

                worksheet.Columns.EntireColumn.AutoFit(); //列宽自适应
                if (fileName != "")
                {
                    try
                    {
                        workbook.Saved = true;
                        workbook.SaveCopyAs(fileName);
                    }
                    catch (Exception ex)
                    {
                        result.ErrorMessage = "文件导出时出错,文件可能正被打开！" + ex.Message;
                        result.HasError = false;
                    }
                }
                xlApp.Quit();
                GC.Collect(); //强行销毁
                result.HasError = true;
            }
            return result;
        }

        /// <summary>
        /// ListView 导出Excel方法
        /// </summary>
        /// <param name="fileName">导出路径</param>
        /// <param name="listView">数据源</param>
        /// <param name="num">从第几列开始导</param>
        public Result SetListViewExportExcel(string fileName, ListView listView, int num)
        {
            var result = new Result();

            if (fileName.IndexOf(":") > 0)
            {
                Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();

                if (xlApp == null)
                {
                    result.ErrorMessage = "无法创建Excel对象，可能您的机子未安装Excel";
                    result.HasError = false;
                }
                Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;
                Microsoft.Office.Interop.Excel.Workbook workbook =
                    workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
                Microsoft.Office.Interop.Excel.Worksheet worksheet =
                    (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1]; //取得sheet1

                int a = 1, b = 1;
                for (var i = 0; i < listView.Items.Count; i++)
                {
                    if (i == 0)
                    {
                        for (var j = num; j < listView.Columns.Count; j++)
                        {
                            worksheet.Cells[1, a] = listView.Columns[j].Text;
                            a++;
                        }
                    }
                    for (var j = num; j < listView.Columns.Count; j++)
                    {
                        worksheet.Cells[i + 2, b] = listView.Items[i].SubItems[j].Text;
                        b++;
                    }
                    b = 1;
                    System.Windows.Forms.Application.DoEvents();
                }

                worksheet.Columns.EntireColumn.AutoFit(); //列宽自适应
                if (fileName != "")
                {
                    try
                    {
                        workbook.Saved = true;
                        workbook.SaveCopyAs(fileName);
                    }
                    catch (Exception ex)
                    {
                        result.ErrorMessage = "文件导出时出错,文件可能正被打开！" + ex.Message;
                        result.HasError = false;
                    }
                }
                xlApp.Quit();
                GC.Collect(); //强行销毁
                result.HasError = true;
            }
            return result;
        }