我有一个 C# .Net MVC 应用程序。我已经完成了Export to Excel用于导出存储在datatable. 我已经存储了datatable会话，直到用户按下导出按钮。当用户按下导出时，我datatable通过 Ajax 调用获取数据并将其导出。数据导出成功时，我还保留了一条消息。
问题是它在调试应用程序时工作正常，但是当我部署应用程序时它不起作用。但它显示成功消息而不是错误消息。应用程序中用于获取数据或存储数据的其他 ajax 调用工作正常。
我试图调试部署的应用程序；异常发生在行
Excel.Application excelApp = new Excel.Application();
例外是
System.UnauthorizedAccessException was caught
Message=Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 80070005 Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)).
导出到 Excel 功能
public static void ExportExcel(this DataTable Tbl, string ExcelFilePath = null)
{
try
{
if (Tbl == null || Tbl.Columns.Count == 0)
//throw new Exception("ExportToExcel: Null or empty input table!\n");
Console.WriteLine("ExportToExcel: Null or empty input table!\n");
// load excel, and create a new workbook
Excel.Application excelApp = new Excel.Application();
excelApp.Workbooks.Add();
// single worksheet
Excel._Worksheet workSheet = excelApp.ActiveSheet;
// column headings
for (int i = 0; i < Tbl.Columns.Count; i++)
{
workSheet.Cells[1, (i + 1)] = Tbl.Columns[i].ColumnName;
workSheet.Cells[1, (i + 1)].Font.Bold = true;
workSheet.Cells[1, (i + 1)].Font.Size = 12;
}
// rows
for (int i = 0; i < Tbl.Rows.Count; i++)
{
// to do: format datetime values before printing
for (int j = 0; j < Tbl.Columns.Count; j++)
{
workSheet.Cells[(i + 2), (j + 1)] = Tbl.Rows[i][j];
}
}
//int k = Tbl.Rows.Count;
// check fielpath
if (ExcelFilePath != null && ExcelFilePath != "")
{
try
{
workSheet.SaveAs(ExcelFilePath);
excelApp.Quit();
//MessageBox.Show("Excel file saved!");
}
catch (Exception ex)
{
//throw new Exception("ExportToExcel: Excel file could not be saved! Check filepath.\n"+ ex.Message);
Console.WriteLine("ExportToExcel: Excel file could not be saved! Check filepath.\n"+ ex.Message);
}
}
else // no filepath is given
{
excelApp.Visible = true;
}
}
catch (Exception ex)
{
//throw new Exception("ExportToExcel: \n" + ex.Message);
Console.WriteLine("ExportToExcel: \n" + ex.Message);
}
}
这是调用函数的代码
public ActionResult JsonExportToExcel()
{
DataTable table = (DataTable)Session["filterCRMRequestDatatable"];
ExportToExcel.ExportExcel(table, "");
var result = "true";
return Json(result, JsonRequestBehavior.AllowGet);
}
ajax调用代码
$("#ExportToExcel").click(function () {
//blur page
$('#loading_div').removeClass("loading-css-back").addClass("loading-css-front");
$('#loading_div').fadeIn();
$('#Full_page_content').removeClass("main-div-front").addClass("main-div-back");
$('#Full_page_content').fadeOut();
$.ajax({
url: '/FilterCRMRequest/JsonExportToExcel/',
type: "POST",
dataType: "json",
success: function (data) {
alert("Data Exported Successfully");
//active the page
$('#loading_div').removeClass("loading-css-front").addClass("loading-css-back");
$('#loading_div').fadeOut();
$('#Full_page_content').removeClass("main-div-back").addClass("main-div-front");
$('#Full_page_content').fadeIn();
},
error: function (xhr, props) {
if (xhr.status == 401) {
alert("Session Expired. Please Login Again");
window.location.href = "/CRMLogin/LogOn";
}
else {
alert("Sorry some Error occured. Please Try again.");
//active the page
$('#loading_div').removeClass("loading-css-front").addClass("loading-css-back");
$('#loading_div').fadeOut();
$('#Full_page_content').removeClass("main-div-back").addClass("main-div-front");
$('#Full_page_content').fadeIn();
}
}
});
});