Crystal Report数据库连接未处理

Question

我在asp.net Web应用程序中使用Visual Studio 2013，并大量使用Crystal Reports。我的数据库是SQL Server（使用AWS RDS）。一切工作正常。从数据库方面来看，唯一的问题是，即使关闭浏览器窗口后，Crystal Report连接也不会关闭/处分。它不断增加连接数。

这是我的代码：

ReportDocument cryRpt = new ReportDocument();

ParameterFields paramFields = new ParameterFields();
ParameterField paramField = new ParameterField();

cryRpt.Load(Server.MapPath("~/Reports/Report001.rpt"));

String host = System.Configuration.ConfigurationManager.AppSettings["SqlServer"];
String database = System.Configuration.ConfigurationManager.AppSettings["SqlDatabase"];
String user = System.Configuration.ConfigurationManager.AppSettings["SqlUsername"];
String password = System.Configuration.ConfigurationManager.AppSettings["SqlPassword"];

var connectionInfo = new ConnectionInfo
        {
            Type = ConnectionInfoType.SQL,
            ServerName = host,
            DatabaseName = database
        };

connectionInfo.IntegratedSecurity = false;
connectionInfo.UserID = user;
connectionInfo.Password = password;

TableLogOnInfo newLogonInfo = null;

foreach (CrystalDecisions.CrystalReports.Engine.Table currentTable in cryRpt.Database.Tables)
{
    newLogonInfo = currentTable.LogOnInfo;
    newLogonInfo.ConnectionInfo = connectionInfo;
    currentTable.ApplyLogOnInfo(newLogonInfo);
}

ParameterField pReportName = new ParameterField();
pReportName.ParameterFieldName = "REPONAME";
ParameterDiscreteValue dcpReportName = new ParameterDiscreteValue();

dcpReportName.Value = "REPORT";

pReportName.CurrentValues.Add(dcpReportName);
paramFields.Add(pReportName);

CrystalReportViewer1.ParameterFieldInfo = paramFields;
CrystalReportViewer1.Zoom(100);
CrystalReportViewer1.PrintMode = CrystalDecisions.Web.PrintMode.ActiveX;
CrystalReportViewer1.ReportSource = cryRpt;
CrystalReportViewer1.ReuseParameterValuesOnRefresh = true;
CrystalReportViewer1.ShowFirstPage();

// Disposing the report
foreach (CrystalDecisions.CrystalReports.Engine.Table currentTable in cryRpt.Database.Tables)
{
     currentTable.Dispose();
}

CrystalReportViewer1.ReportSource = null;
cryRpt.Database.Dispose();
cryRpt.Close();
cryRpt.Dispose();
cryRpt = (ReportDocument)CrystalReportViewer1.ReportSource;
CrystalReportViewer1.Dispose();

connectionInfo.Attributes.Collection.Clear();

GC.Collect();

也试图像这样使用卸载方法。但没有运气。

    protected void CrystalReportViewer1_Unload(object sender, EventArgs e)
    {
       cryRpt.Close();
       cryRpt.Dispose();
       CrystalReportViewer1.Dispose();           
    }

作为一种临时解决方案，我正在使用存储过程从数据库中手动终止睡眠的数据库连接。

我正在使用ODBC连接来获取数据。 ODBC凭据存储在配置文件中，并按以下方式检索。

String host = System.Configuration.ConfigurationManager.AppSettings["SqlServer"];
String database = System.Configuration.ConfigurationManager.AppSettings["SqlDatabase"];
String user = System.Configuration.ConfigurationManager.AppSettings["SqlUsername"];
String password = System.Configuration.ConfigurationManager.AppSettings["SqlPassword"];

请帮助我解决这个问题。

Answer 1

我认为您的问题出在数据库连接本身，而与应用程序无关，而与Crystal Reports组件无关。尝试在放置查看器CrystalReportViewer1.Dispose（）;后关闭连接Connection.Close