Report Viewer 2010陷入循环 [英] Report Viewer 2010 fall in loop

问题描述

大家好，

我曾尝试使用Report Viewer 2010，但是当我传递参数并运行应用程序时，它陷入了循环并且什么也不显示，我的应用程序位于.net 3.5中，但是当我将其转换为4.0时，发生了此问题，我尝试创建新的rdlc并使用Report Viewer 2010，但没有结果，
这是我的CS代码:

Hi everyone,

I have tried to using of report viewer 2010 but when I pass the parameter and run the application it fall in a loop and doesn''t show anything, my application was in .net 3.5 but when I convert that to 4.0 this issue happened, I tried to create a new rdlc and use of report viewer 2010 but no result,
this is my cs code :

protected void Page_Load(object sender, EventArgs e)
       {

           object exCarId = HttpContext.Current.Session[Constants.ExCarID];
           if (exCarId != null)
           {
               string select = string.Format("Select * from ExCar where Id = {0} ", exCarId);
               DataRow datarow = xps.GetDataRow(select);
               if (datarow != null)
               {
                   //    string Herasat = File.ReadAllText(Server.MapPath("~/App_Data/Herasat.txt"));
                   //    string ModirKol = File.ReadAllText(Server.MapPath("~/App_Data/ModirKol.txt"));

                   List<reportparameter> list = new List<reportparameter>();


                   list.Add(new ReportParameter("p1", Convert.ToString(datarow["CarNum"])));
                   list.Add(new ReportParameter("p2", Convert.ToString(datarow["CarType"])));
                   list.Add(new ReportParameter("p3", Convert.ToString(datarow["ShasiNum"])));
                   list.Add(new ReportParameter("p4", Convert.ToString(datarow["OwnerType"])));
                   list.Add(new ReportParameter("p5", Convert.ToString(datarow["MotorNum"])));
                   list.Add(new ReportParameter("p6", Convert.ToString(datarow["SerialNum"])));



                   ReportParameter[] reportParameters = list.ToArray();

                   rptViewer.LocalReport.SetParameters(reportParameters);
                   rptViewer.LocalReport.EnableExternalImages = true;
                   //rptViewer.LocalReport.EnableExternalImages = true;
                   rptViewer.LocalReport.Refresh();
                   rptViewer.DataBind();
               }
           }
       }

thanks in advanced!

推荐答案

也许Refresh 导致Page_Load，而在Page_Load的末尾，Refresh 再次导致Page_Load，这将会永远持续下去.

Maybe Refresh causes a Page_Load and at the end of Page_Load, Refresh causes a Page_Load again and this is going to continue for ever.

我只是添加这个

I just Add this

if (!IsPostBack)
           {
             //
           }

我发现问题是由于回发造成的！

and i found that the issue was because of postback!

这篇关于Report Viewer 2010陷入循环的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！