Setting Parameter To Crystal report ASP.net MVC c#

Question

This is my code :

[HttpGet]
    public ActionResult Report(string id)
        {
            ReportClass rptH = new ReportClass();
            rptH.FileName = AppDomain.CurrentDomain.BaseDirectory + "Reports\\" + id + ".rpt";
            rptH.Load();
             rptH.SetParameterValue(0, "179");
            // rptH.SetParameterValue("Center", "103");
            // rptH.SetDataSource();

            Stream stream = rptH.ExportToStream(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat);
            return File(stream, "application/pdf");   
        }

I'm trying to passing parameter to crystal report but I got this error :

System.Runtime.InteropServices.COMException: Connexion Failed.

At this line :

Stream stream = rptH.ExportToStream(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat);

As I think the problem is due to rptH.setParameterValue line it work's but not showing what I want.

How to fix that please.

Answer 1

似乎文件制作不成功，调试您的代码以确认您已成功建立与数据库的连接并且rptH有效