我首先创建了数据集，然后创建了水晶报告。我已将该水晶报告附加到 Web 表单，但运行该 Web 表单后水晶报告没有显示任何输出。请帮助我获取输出。 我正在使用 Visual Studio 2013。
protected void Page_Load(object sender, EventArgs e)
{
ReportDocument crystalReport = new ReportDocument();
crystalReport.Load(Server.MapPath("~/CrystalReport.rpt"));
DataSet dsCustomers = GetData("select * from customers");
crystalReport.SetDataSource(dsCustomers);
CrystalReportViewer1.ReportSource = crystalReport;
}
private DataSet GetData(string query)
{
string conString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
SqlCommand cmd = new SqlCommand(query);
using (SqlConnection con = new SqlConnection(conString))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = con;
sda.SelectCommand = cmd;
using (DataSet dsCustomers = new DataSet())
{
sda.Fill(dsCustomers, "DataTable1");
return dsCustomers;
}
}
}
}
ASPX：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<%@ Register Assembly="CrystalDecisions.Web, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304" Namespace="CrystalDecisions.Web" TagPrefix="CR" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<CR:CrystalReportViewer ID="CrystalReportViewer1" runat="server" AutoDataBind="true" />
</div>
</form>
</body>
</html>
看起来你缺少数据绑定
protected void Page_Load(object sender, EventArgs e)
{
ReportDocument crystalReport = new ReportDocument();
crystalReport.Load(Server.MapPath("~/CrystalReport.rpt"));
DataSet dsCustomers = GetData("select * from customers");
crystalReport.SetDataSource(dsCustomers);
CrystalReportViewer1.ReportSource = crystalReport;
CrystalReportViewer1.DataBind();
}
我以前遇到过这个问题，当我复制文件夹“aspnet_client”时解决了 到应用程序文件夹 ，在 C:\inetpub\wwwroot 中找到的“aspnet_client” 并在 Web 中添加水晶报表定义，然后进行配置：
<system.web>
<compilation targetFramework="4.0" debug="true">
<assemblies>
<add assembly="CrystalDecisions.Web, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692FBEA5521E1304"/>
<add assembly="CrystalDecisions.Shared, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692FBEA5521E1304"/>
<add assembly="log4net, Version=1.2.10.0, Culture=neutral, PublicKeyToken=692FBEA5521E1304"/>
<add assembly="CrystalDecisions.ReportSource, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692FBEA5521E1304"/>
<add assembly="CrystalDecisions.ReportAppServer.Controllers, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692FBEA5521E1304"/>
<add assembly="CrystalDecisions.ReportAppServer.DataDefModel, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692FBEA5521E1304"/>
<add assembly="CrystalDecisions.CrystalReports.Engine, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692FBEA5521E1304"/>
<add assembly="CrystalDecisions.ReportAppServer.ClientDoc, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304"/>
</assemblies>
</compilation>