问题

I am using visual studio, ASP.NET. In my project i should use crystal report. unfortunately when i use crystal report in asp.net, the result is showing blank page.

My Html Code:

<head runat="server">
<title>Crystal Report From More Than One Table</title>
</head>
<body>
<form id="form1" runat="server">
<table cellpadding="10" cellspacing="10" width="70%" height="300px" align="center"
style="border: solid 2px gray;">
<tr>
<td align="center" style="background-color: SkyBlue;">
<span style="font-family: Times New Roman; font-size: 18pt; color: Green;">Customer
Product Order Detail Report</span>
</td>
</tr>
<tr>
<td align="center">
<asp:Panel ID="pnlReport" runat="server" Height="400px">
<CR:CrystalReportViewer ID="CrystalReportViewer1" runat="server" AutoDataBind="true" />
</asp:Panel>
</td>
</tr>
</table>
</form>
</body>

My CS Code (Code behind):

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using CrystalDecisions.CrystalReports.Engine;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
ReportDocument cryRpt = new ReportDocument();
cryRpt.Load(Server.MapPath("EmployeeCrystalReport.rpt"));
CrystalReportViewer1.ReportSource = cryRpt;
}
}

回答1:

That code is Correct but you should do two steps more:

1) Copy The folder with name `crystalreportviewers13` on the `C:\inetpub\wwwroot\aspnet_client\system_web\4_0_30319` and past it into `project root folder` as below on visual studio:

Right click on your project name, then select Open Folder On File Explorer

Paste the folder with name crystalreportviewers13on this address (Project Root)

After paste that, come back to your solution in visual studio, if the folder is hidden, you can do this:

Click Show All File button

then Right click on the folder with name crystalreportviewers13 which no color icon and choose Include In Project

2) Add this javascript on your html head page:

<script type="text/javascript" src="/crystalreportviewers13/js/crviewer/crv.js"></script>

ENJOY!

来源：https://stackoverflow.com/questions/60021956/blank-result-problem-with-crystal-report-in-asp-net

blank result problem with crystal report in asp.net

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