这个问题给有 CR 经验的人。
我在设置与 Crystal 报表的连接时遇到问题。 我收到了客户的报告。数据库的结构在他的和我的服务器上是一样的。但是服务器和数据库的名称是不同的。 他正在使用“命令”创建报告(在数据库字段中添加命令-> 数据库专家...)。该命令具有一些返回数据的功能。 我尝试在我的计算机上运行此报告,但在尝试执行 TestConnectivity() 时出现问题。此方法返回 false。 我尝试调试,发现在应用 ApplyLogOnInfo() 之后,内部对象 RasTable 有旧的 ConnectionInfo。
我正在使用下一个代码来设置连接:
private void ApplyConnection(ReportDocument report, ConnectionInfo connectionInfo)
{
ApplyLogOnInfo(report, connectionInfo);
ApplyLogOnInfoForSubreports(report, connectionInfo);
}
private void ApplyLogOnInfo(ReportDocument reportDocument, ConnectionInfo connectionInfo)
{
foreach (Table table in reportDocument.Database.Tables)
{
table.LogOnInfo.ConnectionInfo.AllowCustomConnection = true;
TableLogOnInfo tableLogonInfo = table.LogOnInfo;
tableLogonInfo.ConnectionInfo = connectionInfo;
table.ApplyLogOnInfo(tableLogonInfo);
_log.InfoFormat("Table connection state: TableName = {0}, IsConnect = {1}", table.Name, table.TestConnectivity());
}
}
private void ApplyLogOnInfoForSubreports(ReportDocument reportDocument, ConnectionInfo connectionInfo)
{
Sections sections = reportDocument.ReportDefinition.Sections;
foreach (Section section in sections)
{
ReportObjects reportObjects = section.ReportObjects;
foreach (ReportObject reportObject in reportObjects)
{
_log.InfoFormat("Type = {0}, Name = {1}",reportObject.Name, reportObject.Kind);
if (reportObject.Kind == ReportObjectKind.SubreportObject)
{
var subreportObject = (SubreportObject)reportObject;
ReportDocument subReportDocument = subreportObject.OpenSubreport(subreportObject.SubreportName);
ApplyLogOnInfo(subReportDocument, connectionInfo);
}
}
}
}
所以我的问题是:
- 如何建立与 Command 的正确连接?
- 为什么我不能更改连接? (如果报告是在其他服务器上创建的)。
最佳答案
几年前我曾经遇到过同样的问题,然后写了一个类。这是类(class):
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using CrystalDecisions.CrystalReports.Engine;
using CrystalDecisions.Shared;
namespace ReportExportDemo
{
class Reports
{
static TableLogOnInfo crTableLogonInfo;
static ConnectionInfo crConnectionInfo;
static Tables crTables;
static Database crDatabase;
public static void ReportLogin(ReportDocument crDoc, string Server, string Database, string UserID, string Password)
{
crConnectionInfo = new ConnectionInfo();
crConnectionInfo.ServerName = Server;
crConnectionInfo.DatabaseName = Database;
crConnectionInfo.UserID = UserID;
crConnectionInfo.Password = Password;
crDatabase = crDoc.Database; crTables = crDatabase.Tables;
foreach (CrystalDecisions.CrystalReports.Engine.Table crTable in crTables)
{
crTableLogonInfo = crTable.LogOnInfo;
crTableLogonInfo.ConnectionInfo = crConnectionInfo;
crTable.ApplyLogOnInfo(crTableLogonInfo);
}
}
public static void ReportLogin(ReportDocument crDoc, string Server, string Database)
{
crConnectionInfo = new ConnectionInfo();
crConnectionInfo.ServerName = Server;
crConnectionInfo.DatabaseName = Database;
crConnectionInfo.IntegratedSecurity = true;
crDatabase = crDoc.Database; crTables = crDatabase.Tables;
foreach (CrystalDecisions.CrystalReports.Engine.Table crTable in crTables)
{
crTableLogonInfo = crTable.LogOnInfo;
crTableLogonInfo.ConnectionInfo = crConnectionInfo;
crTable.ApplyLogOnInfo(crTableLogonInfo);
}
}
}
}
以防万一,如果您想知道如何使用,请在此处阅读更多信息:http://midnightprogrammer.net/post/Passing-Parameters-and-Loading-Crystal-Report-Programmatically.aspx
关于c# - Crystal 报表和连接问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/4864169/