如何在Asp.Net MVC中导出到Excel？

SCRIPT

function PostExportValues(meter_id, range_type_id, start_date, end_date, returnUrl) {
    var meter = $("#meter_selection").val()[0];
    $.ajax({
        url: '@Url.Action("GridExportToExcel", "Widget")',
        type: 'POST',
        data: { MeterType: meter_id, DateRangeType: range_type_id, StartDate: start_date, EndDate: end_date, returnUrl: returnUrl, Meter: meter },
        success: function () {
            alert("Success.");
        },
        error: function () {
            alert("Error!");
        }
    });   //end ajax
} //end PostExportValues

控制器

public void GridExportToExcel(int MeterType, int DateRangeType, DateTime? StartDate, DateTime? EndDate, string returnUrl, int Meter)
{
    Customers customer = CustomerManager.GetCustomer(WebSecurity.CurrentUserId);
    //if start date is null, then set it to another early date.
    DateTime startDate = DateTimeManager.GetStartDate(StartDate, DateRangeType, customer.sno);
    //if end date is null, then set to date time now.
    DateTime endDate = DateTimeManager.GetEndDate(EndDate, StartDate);

    IQueryable<MeterReadingsForChart> meterReadings = MeterReadingManager.GetCustomerMeterReadings(customer.sno, MeterType, Meter, startDate, endDate, DateTimeManager.GetTimeIntervalTypeById(DateRangeType)).AsQueryable(); // MeterReadingManager.GetCustomerTotalMeterReadings(customer.sno, MeterType, startDate, endDate, DateTimeManager.GetTimeIntervalTypeById(DateRangeType)).AsQueryable();
    var table = MeterReadingManager.GetMeterReadingsPivot(meterReadings, MeterType);

    //table output some thing like following:
    //T1 T2 T3
    //10 20 25
    //13 23 21
    //15 26 27

    var grid = new GridView();
    grid.DataSource = table;
    grid.DataBind();

    Response.ClearContent();
    Response.AddHeader("content-disposition", "attachment; filename=MyExcelFile.xls");

    Response.ContentType = "application/excel";
    StringWriter sw = new StringWriter();
    HtmlTextWriter htw = new HtmlTextWriter(sw);

    grid.RenderControl(htw);

    Response.Write(sw.ToString());
    Response.End();

    //return View("Index");
}

Method GridExportToExcel正在运行并且脚本警报消息是Success.，但没有任何动作（什么也没有发生）。

我缺少什么？我希望 Excel 文件会自动下载。

谢谢...

您无法在 ajax 查询上调用文件下载，因为浏览器不会触发文件下载。不要使用 ajax 调用你的控制器方法，你可以使用像

window.open("url/Exporttoexcel?id=");

添加参数。