小编Jay*_*son的帖子

我在我的asp.net mvc 4应用程序中有一个excel下载.当我单击导出按钮时,将调用以下控制器方法.因为我需要异步完成,所以我在这里使用异步并等待.

public async Task<ActionResult> GenerateReportExcel()
    {
        ExcelGenerator excel = new ExcelGenerator();
        var filePath = await excel.ReportExcelAsync(midyearReportViewModel);
        System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
        response.ClearContent();
        response.Clear();
        response.ContentType = "text/plain";
        response.AddHeader("Content-Disposition", string.Format("attachment;filename={0}.xlsx;", PdaResource.ReportFileName)); 
        response.TransmitFile(filePath);
        response.Flush();
        response.End();
        return PartialView("_MidYearReportPartial", midyearReportViewModel);
    }

此方法调用excel生成器方法ReportExcelAsync,如下所示

public async Task<string> ReportExcelAsync(MidYearReportViewModel _midyearAnnualviewModel)
    {
        string fileName = "MidYearReport";
        string finalXcelPath = string.Empty;
        string currentDirectorypath = new DirectoryInfo(HttpContext.Current.Server.MapPath("~/Export")).ToString();
        finalXcelPath = string.Format("{0}\\{1}.xlsx", currentDirectorypath, fileName);
        if (System.IO.File.Exists(finalXcelPath))
        {
            System.IO.File.Delete(finalXcelPath);
        }
        var newFile = new FileInfo(finalXcelPath);
        using (ResXResourceSet resxSet = new ResXResourceSet(resxFile))
        {
            using …