导出到在本地主机上工作的Excel函数，但不在发布的网站上

我有这个代码导出我的GridView到Excel，它在localhost中工作，但部署后它不起作用。 单击我的导出button时收到的错误是运行时错误。

protected void EXPORT_BUTTON_Click(object sender, EventArgs e) { 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); String DATA1 = "DATA1"; String DATA2 = "DATA2"; ExportToExcel(app, workbook, DATA_1, DATA1); workbook.Worksheets["Sheet1"].Delete(); workbook.Worksheets["Sheet2"].Delete(); workbook.Worksheets["Sheet3"].Delete(); ExportToExcel(app, workbook, DATA_2, DATA2); string FolderPath = ServerName + DirectoryLocation + DirectoryFolder + ExportsFolder; var filename = @"EXCEL_" + datetime.ToString("dd-MM-yyyy_hh-mm-ss") + ".xlsx"; workbook.SaveAs(FolderPath + filename, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing); workbook.Close(); app.Quit(); Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"; Response.AddHeader("content-disposition", "attachment; filename=" + filename + ";"); Response.TransmitFile(FolderPath + filename); Response.Flush(); Response.End(); } public void ExportToExcel(Microsoft.Office.Interop.Excel._Application app, Microsoft.Office.Interop.Excel._Workbook workbook, GridView gridview, string SheetName) { // see the excel sheet behind the program app.Visible = false; Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets.Add(); // changing the name of active sheet worksheet.Name = SheetName; // storing header part in Excel for (int i = 1; i < gridview.Columns.Count + 1; i++) { worksheet.Cells[1, i] = gridview.Columns[i - 1].HeaderText; } // storing Each row and column value to excel sheet for (int i = 0; i < gridview.Rows.Count - 1; i++) { for (int j = 0; j < gridview.Columns.Count; j++) { worksheet.Cells[i + 2, j + 1] = gridview.Rows[i].Cells[j].Text.ToString(); } } } 

Answer 1

我使用EPPLUS解决了我的问题，EPPlus是一个使用Open Office Xml格式（xlsx）读取和写入Excel 2007/2010文件的.net库。 它不需要在服务器上安装excel。 谢谢。

下面的代码是一个参考：

 protected void ExportToExcel_Click(object sender, EventArgs e) { var products = GetProducts(); GridView1.DataSource = products; GridView1.DataBind(); ExcelPackage excel = new ExcelPackage(); var workSheet = excel.Workbook.Worksheets.Add("Products"); var totalCols = GridView1.Rows[0].Cells.Count; var totalRows = GridView1.Rows.Count; var headerRow = GridView1.HeaderRow; for (var i = 1; i <= totalCols; i++ ) { workSheet.Cells[1, i].Value = headerRow.Cells[i - 1].Text; } for (var j = 1; j <= totalRows; j++ ) { for (var i = 1; i <= totalCols; i++) { var product = products.ElementAt(j-1); workSheet.Cells[j + 1, i].Value = product.GetType().GetProperty(headerRow.Cells[i - 1].Text).GetValue(product, null); } } using (var memoryStream = new MemoryStream()) { Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"; Response.AddHeader("content-disposition", "attachment; filename=products.xlsx"); excel.SaveAs(memoryStream); memoryStream.WriteTo(Response.OutputStream); Response.Flush(); Response.End(); } } 

Answer 2

“Microsoft.Office.Interop.Excel”表示必须安装Microsoft Office运行时才能使此代码正常工作。

使用Microsoft.Office.Interop.Excel导出数据是可以避免的，因为它需要在服务器上安装应用程序，可扩展性差，并且不符合MS Office许可条件。

我build议其他方式，如文本CSV导出将在服务器上满足更好的性能。

 protected void EXPORT_BUTTON_Click(object sender, EventArgs e) { ... StringBuilder sb = new StringBuilder(); // storing header part in Excel for (int i = 1; i < gridview.Columns.Count + 1; i++) { sb.Append (gridview.Columns[i - 1].HeaderText); stringBuilder.Append(","); } sb.Append(Environment.NewLine); // storing Each row and column value to excel sheet for (int i = 0; i < gridview.Rows.Count - 1; i++) { for (int j = 0; j < gridview.Columns.Count; j++) { sb.Append (gridview.Rows[i].Cells[j].Text.ToString()); stringBuilder.Append(","); } sb.Append(Environment.NewLine); } WriteToCSV(sb.ToString(); } public static void WriteToCSV(string text, string fileName) { string attachment = "attachment; filename="+fileName+DateTime.Now.ToString("yy-MM-dd")+".csv"; HttpContext.Current.Response.Clear(); HttpContext.Current.Response.ClearHeaders(); HttpContext.Current.Response.ClearContent(); HttpContext.Current.Response.AddHeader("content-disposition", attachment); HttpContext.Current.Response.ContentType = "text/csv;charset=utf8"; HttpContext.Current.Response.AddHeader("Pragma", "public"); HttpContext.Current.Response.Write('\uFEFF'); //this is BOM HttpContext.Current.Response.Write(text); HttpContext.Current.Response.End(); } 

Answer 3

它失败的原因是你没有安装Excel。 这里还有其他的select（比如转换为CSV文件），但是如果你想直接使用你的代码，最简单的方法就是在服务器上安装Excel。