使用 ODBC 连接在代码隐藏中加载 Crystal Report

Question

我有一组当前的代码用于在 c# 中通过服务器连接加载 Crystal Report。

这是加载报告的代码：

CrystalReportViewer1.ParameterFieldInfo.Clear();
string reportName = Request.QueryString["rpt"];
if (reportName != null)
{
    crystalReport = new ReportDocument();
    crystalReport.Load(@"\\esco-iis\crystalreports\purchasing\po.rpt");
    //crystalReport.Load(@"\\esco\crystalreports\purchasing\po.rpt");

    var connectionInfo = new ConnectionInfo();
    connectionInfo.ServerName = "server";
    connectionInfo.DatabaseName = "database";
    connectionInfo.Password = "pass";
    connectionInfo.UserID = "user";
    connectionInfo.IntegratedSecurity = false;
    crystalReport.SetDatabaseLogon("user", "pass", "server", "database");
    Tables CrTables = crystalReport.Database.Tables;
    TableLogOnInfo crtableLogoninfo = new TableLogOnInfo();
    foreach (CrystalDecisions.CrystalReports.Engine.Table CrTable in CrTables)
    {
        crtableLogoninfo = CrTable.LogOnInfo;
        crtableLogoninfo.ConnectionInfo = connectionInfo;
        CrTable.ApplyLogOnInfo(crtableLogoninfo);
        CrystalReportViewer1.LogOnInfo.Add(crtableLogoninfo);

    }

    foreach (ReportDocument report in crystalReport.Subreports)
    {
        report.SetDatabaseLogon("user", "pass", "server", "database");
        foreach (CrystalDecisions.CrystalReports.Engine.Table CrTable in report.Database.Tables)
        {
            crtableLogoninfo = CrTable.LogOnInfo;
            crtableLogoninfo.ConnectionInfo = connectionInfo;
            CrTable.ApplyLogOnInfo(crtableLogoninfo);
            CrystalReportViewer1.LogOnInfo.Add(crtableLogoninfo);
        }
    }

    string PO = Request.QueryString["PO"];
    if (PO != null)
    {
        ParameterField parameter = new ParameterField();
        ParameterDiscreteValue parameterValue = new ParameterDiscreteValue();
        parameterValue.Value = PO;
        parameter.Name = "@PO";
        parameter.CurrentValues.Add(parameterValue);
        CrystalReportViewer1.ParameterFieldInfo.Add(parameter);
    }
}

当前状态：这在报表设置为直接连接到数据库时有效，但其中大约一半设置为使用 ODBC 连接。

尝试：我尝试将服务器名称切换为 ODBC 连接的名称，但这仍然返回相同的 Failed to open the connection. Failed to open the connection. 错误。

问题：我似乎无法弄清楚我可以在我的 ConnectionInfo 中进行哪些更改才能使其成功使用 ODBC 连接。我不断收到Failed to open the connection. Failed to open the connection.

我知道单独进行连接并设置报告源的解决方案，但这不可行，因为报告很多。

提前致谢！

Answer 1

在运行时设置ODBC连接是rathertricky，主要是因为这些额外的“登录属性”和“连接属性”都需要设置：

// DbConnectionAttributes contains some, but not all, consts.
var logonProperties = new DbConnectionAttributes();
logonProperties.Collection.Set("Connection String", @"Driver={SQL Server};Server=TODD-PC\SQLEXPRESS2;Trusted_Connection=Yes;");
logonProperties.Collection.Set("UseDSNProperties", false);

var connectionAttributes = new DbConnectionAttributes();
connectionAttributes.Collection.Set("Database DLL", "crdb_odbc.dll");
connectionAttributes.Collection.Set("QE_DatabaseName", String.Empty);
connectionAttributes.Collection.Set("QE_DatabaseType", "ODBC (RDO)");
connectionAttributes.Collection.Set("QE_LogonProperties", logonProperties);
connectionAttributes.Collection.Set("QE_ServerDescription", @"TODD-PC\SQLEXPRESS2");
connectionAttributes.Collection.Set("QE_SQLDB", true);
connectionAttributes.Collection.Set("SSO Enabled", false);

return new ConnectionInfo
           {
               Attributes = connectionAttributes,
               // These don't seem necessary, but we'll include them anyway: ReportDocument.Load does
               ServerName = @"TODD-PC\SQLEXPRESS2",
               Type = ConnectionInfoType.CRQE
           };

---

另一方面，与其从头开始创建 ConnectionInfo 对象，不如使用现有的对象，尤其是如果您已经使用类似的连接设计了报表：

foreach (Table crTable in crTables)
{
    TableLogOnInfo tableLogOnInfo = crTable.LogOnInfo;
    var connectionInfo = tableLogOnInfo.ConnectionInfo;

    // set connection info stuff here

    crTable.ApplyLogOnInfo(tableLogOnInfo);
}

Answer 2

对于使用 SQL Server ODBC 的旧报告，可能需要使用“SQL Server Native Driver 11.0”。

class CrystalDatabase
    {

        public static TableLogOnInfo GetODBCTableLogOnInfo(string ODBCName, string serverName, string databaseName, string userID, string password)
        {
            CrystalDecisions.ReportAppServer.DataDefModel.PropertyBag connectionAttributes = new CrystalDecisions.ReportAppServer.DataDefModel.PropertyBag();

            connectionAttributes.EnsureCapacity(3);
            connectionAttributes.Add(DbConnectionAttributes.CONNINFO_CONNECTION_STRING, string.Format("DSN={0};Driver={{SQL Server}}", ODBCName));
            connectionAttributes.Add("Server", serverName);
            connectionAttributes.Add("UseDSNProperties", false);

            DbConnectionAttributes attributes = new DbConnectionAttributes();
            attributes.Collection.Add(new NameValuePair2("Database DLL", "crdb_odbc.dll"));
            attributes.Collection.Add(new NameValuePair2("QE_DatabaseName", databaseName));
            attributes.Collection.Add(new NameValuePair2("QE_DatabaseType", "ODBC (RDO)"));
            attributes.Collection.Add(new NameValuePair2("QE_LogonProperties", connectionAttributes));
            attributes.Collection.Add(new NameValuePair2("QE_ServerDescription", serverName));
            attributes.Collection.Add(new NameValuePair2("QE_SQLDB", true));
            attributes.Collection.Add(new NameValuePair2("SSO Enabled", false));

            ConnectionInfo connectionInfo = GetConnectionInfo(serverName, databaseName, userID, password);
            connectionInfo.Attributes = attributes;
            connectionInfo.Type = ConnectionInfoType.CRQE;
            connectionInfo.IntegratedSecurity = false;
            TableLogOnInfo tableLogOnInfo = new TableLogOnInfo();
            tableLogOnInfo.ConnectionInfo = connectionInfo;
            return tableLogOnInfo;
        }

        public static ConnectionInfo GetConnectionInfo(string serverName, string databaseName, string userID, string password)
        {
            ConnectionInfo connectionInfo = new ConnectionInfo();
            connectionInfo.ServerName = serverName;
            connectionInfo.DatabaseName = databaseName;
            connectionInfo.UserID = userID;
            connectionInfo.Password = password;

            return connectionInfo;
        }
    }

这个类应该和类似这样的实现结合起来：crystal report failed to get data