Question

请帮我解决Crystal报告有多个参数传递＆amp;动态更改数据库信息。我的代码如下：

        ParameterFields paramFields = new ParameterFields();
        ReportDocument reportDocument = new ReportDocument();
        reportDocument.Load(Server.MapPath(ReportName + ".rpt"));


        ParameterDiscreteValue crParameterDiscreteValue= new ParameterDiscreteValue();
        ParameterFieldDefinitions crParameterFieldDefinitions ;
        ParameterFieldDefinition crParameterFieldLocation ;
        ParameterValues crParameterValues = new ParameterValues();
        crParameterFieldDefinitions= reportDocument.DataDefinition.ParameterFields;

        // 1stParameter Satrt
        crParameterFieldLocation= crParameterFieldDefinitions["@userid"];
        crParameterValues= crParameterFieldLocation.CurrentValues;
        crParameterDiscreteValue= new CrystalDecisions.Shared.ParameterDiscreteValue();
        crParameterDiscreteValue.Value=Convert.ToInt64(ViewState["userid"]);
        crParameterValues.Add(crParameterDiscreteValue);
        crParameterFieldLocation.ApplyCurrentValues(crParameterValues);
        //1st Parameter End
         // 2nd Parameter Satrt
        crParameterFieldLocation= crParameterFieldDefinitions["@Reportname"];
        crParameterValues= crParameterFieldLocation.CurrentValues;
        crParameterDiscreteValue= new CrystalDecisions.Shared.ParameterDiscreteValue();
        crParameterDiscreteValue.Value=ReportName;
        crParameterValues.Add(crParameterDiscreteValue);
        crParameterFieldLocation.ApplyCurrentValues(crParameterValues);
        //2nd Parameter End
         // 3rd Parameter Satrt
        crParameterFieldLocation= crParameterFieldDefinitions["@SessionId"];
        crParameterValues= crParameterFieldLocation.CurrentValues;
        crParameterDiscreteValue= new CrystalDecisions.Shared.ParameterDiscreteValue();
        crParameterDiscreteValue.Value=Session.SessionID.ToString();
        crParameterValues.Add(crParameterDiscreteValue);
        crParameterFieldLocation.ApplyCurrentValues(crParameterValues);
        //3rd Parameter End

        CrystalReportViewer1.ReportSource = reportDocument;
         CrystalReportViewer1.EnableDatabaseLogonPrompt = false;
         ConnectionInfo connectionInfo = new ConnectionInfo();
         connectionInfo.ServerName = "192.168.0.245";
         connectionInfo.DatabaseName = "Databasename";
         connectionInfo.UserID = "sa";
         connectionInfo.Password = "Password1";
        TableLogOnInfo tableLogOnInfo = new TableLogOnInfo();
        tableLogOnInfo.ConnectionInfo= connectionInfo;

        foreach (CrystalDecisions.CrystalReports.Engine.Table table in reportDocument.Database.Tables)
    {
        table.ApplyLogOnInfo(tableLogOnInfo);
    }

现在说“无法打开行集”。当我使用确切的参数值手动运行存储过程时，它会显示结果。所以存储过程返回值。请帮帮我。在Crystal报表的设计过程中，数据库服务器信息与传递的信息不同。

Answer 1

不是在服务器名称中提供IP，而是在服务器系统中创建DSN（如果数据库是系统所有，在同一系统中创建DSN）并将DSN名称作为服务器名称，并提供相应的数据库详细信息DSN。

它会工作，我实施和测试。

Answer 2

在您的系统中创建DSN，然后尝试使用此代码，

ConnectionInfo connectionInfo1 = new ConnectionInfo();
connectionInfo1.ServerName = "Your system dsn name";
connectionInfo1.DatabaseName = "database name";
connectionInfo1.UserID = "username";
connectionInfo1.Password = "secure password";

水晶报告带参数传递＆amp;动态更改数据库信息

2 个答案: