我有一个观点，即返回动态创建的PDF，然后在新标签中显示PDF，而不是返回View()。我不是在任何地方保存PDF或将其存储在任何地方。我想要做的是在创建PDF时显示加载屏幕。可以这样做吗？
public ActionResult SolicitorActionReport_Load(SolicitorActionParamsViewModel viewModel) {
var cultivationModel = new CultivationModel(viewModel, ConstituentRepository, CampaignRepository);
var cultivationData = cultivationModel.GetCultivationActivityData();
var reportParamModel = new List<ReportParamModel>
{new ReportParamModel {AgencyName = SelectedUserAgency.AgencyName, StartDate = viewModel.StartDate, EndDate = viewModel.EndDate}};
var reportToRun = "ActionDateCultivationReport";
if (viewModel.SortActionBy == SolicitorActionReportSortType.Constituent) {
reportToRun = "ConstituentCultivationReport";
} else if (viewModel.SortActionBy == SolicitorActionReportSortType.Solicitor) {
reportToRun = "SolicitorCultivationReport";
}
return FileContentPdf("Constituent", reportToRun, cultivationData, reportParamModel, new List<FundraisingAppealMassSummary>(), new List<FundraisingAppealPortfolioSummary>());
}
public FileContentResult FileContentPdf(string folder, string reportName, object dataSet,object reportParamModel,object appealMassDataSet, object appealPortfolioDataSet) {
var localReport = new LocalReport();
localReport.ReportPath = Server.MapPath("~/bin/Reports/" + folder + "/rpt" + reportName + ".rdlc");
var reportDataSource = new ReportDataSource(reportName + "DataSet", dataSet);
var reportParamsDataSource = new ReportDataSource("ReportParamModelDataSet", reportParamModel);
var reportParamsDataSourceMass = new ReportDataSource("FundraisingAppealMassSummaryDataSet", appealMassDataSet);
var reportParamsDataSourcePortfolio = new ReportDataSource("FundraisingAppealPortfolioSummaryDataSet", appealPortfolioDataSet);
#region Setting ReportViewControl
localReport.DataSources.Add(reportDataSource);
localReport.DataSources.Add(reportParamsDataSource);
localReport.DataSources.Add(reportParamsDataSourceMass);
localReport.DataSources.Add(reportParamsDataSourcePortfolio);
localReport.SubreportProcessing += (s, e) => { e.DataSources.Add(reportDataSource); };
string reportType = "pdf";
string mimeType;
string encoding;
string fileNameExtension;
//The DeviceInfo settings should be changed based on the reportType
//http://msdn2.microsoft.com/en-us/library/ms155397.aspx
string deviceInfo = "<DeviceInfo><OutputFormat>PDF</OutputFormat></DeviceInfo>";
Warning[] warnings;
string[] streams;
byte[] renderedBytes;
//Render the report
renderedBytes = localReport.Render(reportType, deviceInfo, out mimeType, out encoding, out fileNameExtension, out streams, out warnings);
#endregion
return File(renderedBytes, mimeType);
}
答案 0 :(得分：5)
我没有在任何地方保存PDF或将其存储在任何地方。我想要做的是在创建PDF时显示加载屏幕。可以这样做吗？
否，不在新标签页中。
您尝试做的主要问题是在控制浏览器方面缺乏力量。具体来说，当您告诉锚点在新选项卡中打开其超链接时（即target="_blank"）。有一些常见的方法通常会让用户感到沮丧，因为你正在改变他们可能依赖/依赖的行为。
使用此jQuery File Download plugin（view a demo），您可以非常接近所需的结果。基本上，它操纵iframe来排队下载。这样就可以显示加载div，同时还可以将用户保留在活动页面上（而不是将用户指向另一个选项卡）。然后，用户可以单击下载的PDF，该PDF最有可能在新选项卡中打开（查看兼容的浏览器here）。
如果您决定使用此插件，请执行以下步骤：
js来源并将其包含在您的Scripts中。包含插件MVC Demo中提供的FileDownloadAttribute类：
[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, Inherited = true, AllowMultiple = false)]
public class FileDownloadAttribute: ActionFilterAttribute
{
public FileDownloadAttribute(string cookieName = "fileDownload", string cookiePath = "/")
{
CookieName = cookieName;
CookiePath = cookiePath;
}
public string CookieName { get; set; }
public string CookiePath { get; set; }
/// <summary>
/// If the current response is a FileResult (an MVC base class for files) then write a
/// cookie to inform jquery.fileDownload that a successful file download has occured
/// </summary>
/// <param name="filterContext"></param>
private void CheckAndHandleFileResult(ActionExecutedContext filterContext)
{
var httpContext = filterContext.HttpContext;
var response = httpContext.Response;
if (filterContext.Result is FileResult)
//jquery.fileDownload uses this cookie to determine that a file download has completed successfully
response.AppendCookie(new HttpCookie(CookieName, "true") { Path = CookiePath });
else
//ensure that the cookie is removed in case someone did a file download without using jquery.fileDownload
if (httpContext.Request.Cookies[CookieName] != null)
{
response.AppendCookie(new HttpCookie(CookieName, "true") { Expires = DateTime.Now.AddYears(-1), Path = CookiePath });
}
}
public override void OnActionExecuted(ActionExecutedContext filterContext)
{
CheckAndHandleFileResult(filterContext);
base.OnActionExecuted(filterContext);
}
}
<子> github source
将FileDownload属性应用于ActionResult方法：
[FileDownload]
public ActionResult SolicitorActionReport_Load(SolicitorActionParamsViewModel viewModel) {
...
return FileContentPdf("Constituent", reportToRun, cultivationData, reportParamModel, new List<FundraisingAppealMassSummary>(), new List<FundraisingAppealPortfolioSummary>());
}
在您要链接到报告的View中添加必要的标记：
<a class="report-download" href="/Route/To/SolicitorActionReport">Download PDF</a>
将事件处理程序附加到report-download锚点：
$(document).on("click", "a.report-download", function () {
$.fileDownload($(this).prop('href'), {
preparingMessageHtml: "We are preparing your report, please wait...",
failMessageHtml: "There was a problem generating your report, please try again."
});
return false; //this is critical to stop the click event which will trigger a normal file download!
});
您可以在http://jqueryfiledownload.apphb.com/查看工作演示。还有一个演示使用预先设置的jQuery UI模式来“美化”用户体验。
您还可以从johnculviner / jquery.fileDownload github下载演示ASP.NET MVC解决方案，以查看所有这些工作。
答案 1 :(得分：0)
我认为你有两个选择：
或