上下文中没有响应？ 怎么解决？

我将pdf文件保存为流。 我想将流保存到Response流。 但它总是抛出错误：上下文中没有响应。

这是代码：

using System; using System.Threading; using System.IO; using Spire.Pdf; namespace SingleThreadTest { public partial class Test : System.Web.UI.Page { //[STAThread] protected void Page_Load(object sender, EventArgs e) { } [STAThread] protected void Button1_Click(object sender, EventArgs e) { ////new a thread ThreadStart threadStart = HTMLToPDF; Thread thread = new Thread(threadStart); thread.SetApartmentState(ApartmentState.STA); thread.Start(); } void HTMLToPDF() { PdfDocument doc = new PdfDocument(); String url = "http://www.e-iceblue.com/"; doc.LoadFromHTML(url, false, true, true); Response.ClearContent(); Response.ClearHeaders(); Response.BufferOutput = true; Response.ContentType = "application/pdf"; using (MemoryStream pdfStream = new MemoryStream()) { doc.SaveToStream(pdfStream); using (MemoryStream ms = new MemoryStream()) { //ms.WriteTo(Response.OutputStream); Response.OutputStream.Write(pdfStream.ToArray(), 0, pdfStream.ToArray().Length); } } doc.SaveToHttpResponse("Test.pdf", Response, HttpReadType.Save); doc.Close(); } } } 

我想给客户发送附件。 如何实现它??（上面的代码我使用Spire.PDF的第三个组件）。

提前致谢。

Answer 1

您正在开始处理请求的新线程，但您的原始线程可能会继续执行并成功终止请求，然后您的新线程甚至会对响应执行某些操作。 您必须等待原始线程中新线程的完成（您可以创造性地使用异步页面来阻止原始线程http://msdn.microsoft.com/en-us/magazine/cc163725.aspx ）。

Answer 2

我有类似的任务。 我有一个数据集，我需要返回客户端excel文件。

我用AXD处理程序解决了。 添加到AXD的Web配置参考。

见例子

见下面的代码

 using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using Spire; using Spire.Xls; namespace SD.Reval.Admin.Services { public class ExportHandler : IHttpHandler { virtual public bool IsReusable { get { return true; } } virtual public void ProcessRequest(HttpContext context) { try { Workbook workbook = new Workbook(); Worksheet worksheet; int counter = 0; string methodName = HttpContext.Current.Request.QueryString["methodName"]; string fileName = HttpContext.Current.Request.QueryString["fileName"]; string parameters = HttpContext.Current.Request.QueryString["params"]; if (parameters == null) parameters = HttpContext.Current.Request.Form["params"]; int workSheetCount = workbook.Worksheets.Count; string tableName = string.Empty ; if (methodName.Length > 0 && fileName.Length > 0) { DataSet dataSet = (DataSet)ServiceInterface.InternalGenericInvoke(methodName, parameters); foreach (DataTable dt in dataSet.Tables) { if (dt.Columns.Count > 0) { tableName = dt.TableName ; if (counter >= workSheetCount) worksheet=workbook.Worksheets.Add(tableName); else { worksheet = workbook.Worksheets[counter]; worksheet.Name = tableName; } worksheet.InsertDataTable(dt, true, 4, 1, -1, -1); counter++; worksheet.AllocatedRange.AutoFitColumns(); worksheet.AllocatedRange.AutoFitRows(); worksheet.Pictures.Add(1, 1, SD.Reval.Admin.Services.ResourceFile.logo_reval ); //Sets header style CellStyle styleHeader = worksheet.Rows[0].Style; styleHeader.Borders[BordersLineType.EdgeLeft].LineStyle = LineStyleType.Thin; styleHeader.Borders[BordersLineType.EdgeRight].LineStyle = LineStyleType.Thin; styleHeader.Borders[BordersLineType.EdgeTop].LineStyle = LineStyleType.Thin; styleHeader.Borders[BordersLineType.EdgeBottom].LineStyle = LineStyleType.Thin; styleHeader.VerticalAlignment = VerticalAlignType.Center; styleHeader.KnownColor = ExcelColors.Green; styleHeader.Font.KnownColor = ExcelColors.White; styleHeader.Font.IsBold = true; } } fileName = fileName + ".xls"; workbook.SaveToHttpResponse(fileName, context.Response); context.Response.Buffer = true; context.Response.ContentType = "application/x-msdownload"; context.Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName ); } } catch (Exception ex) { Log.WriteLog(ex); throw new ApplicationException("The epxport process failed", ex); } finally { } } } }