xugang 记录一个.NET 程序员的成长 asp.net水晶报表的一些问题

1。第一步是添加新项CrystalReport1
2。在CrystalReport1.rpt面页右键选择:”数据库”à”添加/删除数据库”出现下面对话框:
然后点开OLE DB(ADO)的加号,将弹出选择数据库的对话框
其中”项目数据”里面的”当前连接”显示的就是OLE DB(ADO)的连接,这样就可以将表添加到右边的”选定的表”中了(切记:不要既从”OLE DB” 中选表或命令又从”当前连接”中选,如果你用了数据集,也是一样的道理,否则全提示出”登陆失败”的错误!)
3。字段资料管理器里面”数据库字段”里把字段直接拖到CrystalReport.rpt里面了.布置好布局.
4。回到WebForm1.aspx页面,选择控件CrystalReportViewer将其放到页面上。
5。代码
using CrystalDecisions.Shared;
using CrystalDecisions.CrystalReports.Engine;
在WebForm1.aspx.cs的Form_Load里面添加代码:
TableLogOnInfo logOnInfo = new TableLogOnInfo();
ReportDocument rpdMy0= new ReportDocument();
logOnInfo.ConnectionInfo.ServerName = "NNN";
logOnInfo.ConnectionInfo.Password="dong";
logOnInfo.ConnectionInfo.DatabaseName="Lab";
logOnInfo.ConnectionInfo.UserID = "sa";

String path = Server.MapPath("CrystalReport2.rpt");
rpdMy0.Load(path);
rpdMy0.Database.Tables[0].ApplyLogOnInfo(logOnInfo);
CrystalReportViewer1.ReportSource = rpdMy0;
其中:
TableLogOnInfo类是: 提供属性，以便检索和设置表连接选项.它有一个连接的属性ConnectionInfo,用来设置与数据库的连接.如上面的ServerName等.生成一个报表文档对象将前面我们做好的那个CrystalReport1.rpt赋给它.在这里要注意的是Database属性!然后把报表对象做为CrystalReportViewer1的数据源.
或者，获得数据库的方法改为直接从数据库获得DataSet
using System.Data.SqlClient;
using System.Collections.Specialized;
string strConn=System.Configuration.ConfigurationSettings.AppSettings["DB"].ToString();
using (SqlConnection conn = new SqlConnection(strConn))
{
SqlDataAdapter da = new SqlDataAdapter(strSQL,conn);//strSQL是SQL语言"select * from dbo.table1"
DataSet ds=new DataSet();
da.Fill( ds);
CrystalReport1 cr1 = new CrystalReport1();
cr1.SetDataSource( ds);
CrystalReportViewer1.ReportSource = cr1;
}
using CrystalDecisions.Shared;
using CrystalDecisions.CrystalReports.Engine;
在WebForm1.aspx.cs的Form_Load里面添加代码:
TableLogOnInfo logOnInfo = new TableLogOnInfo();
ReportDocument rpdMy0= new ReportDocument();
logOnInfo.ConnectionInfo.ServerName = "NNN";
logOnInfo.ConnectionInfo.Password="dong";
logOnInfo.ConnectionInfo.DatabaseName="Lab";
logOnInfo.ConnectionInfo.UserID = "sa";

String path = Server.MapPath("CrystalReport2.rpt");
rpdMy0.Load(path);
rpdMy0.Database.Tables[0].ApplyLogOnInfo(logOnInfo);
CrystalReportViewer1.ReportSource = rpdMy0;
其中:
TableLogOnInfo类是: 提供属性，以便检索和设置表连接选项.它有一个连接的属性ConnectionInfo,用来设置与数据库的连接.如上面的ServerName等.生成一个报表文档对象将前面我们做好的那个CrystalReport1.rpt赋给它.在这里要注意的是Database属性!然后把报表对象做为CrystalReportViewer1的数据源.
或者，获得数据库的方法改为直接从数据库获得DataSet
using System.Data.SqlClient;
using System.Collections.Specialized;
string strConn=System.Configuration.ConfigurationSettings.AppSettings["DB"].ToString();
using (SqlConnection conn = new SqlConnection(strConn))
{
SqlDataAdapter da = new SqlDataAdapter(strSQL,conn);//strSQL是SQL语言"select * from dbo.table1"
DataSet ds=new DataSet();
da.Fill( ds);
CrystalReport1 cr1 = new CrystalReport1();
cr1.SetDataSource( ds);
CrystalReportViewer1.ReportSource = cr1;
}
using CrystalDecisions.Shared;
using CrystalDecisions.CrystalReports.Engine;
在WebForm1.aspx.cs的Form_Load里面添加代码:
TableLogOnInfo logOnInfo = new TableLogOnInfo();
ReportDocument rpdMy0= new ReportDocument();
logOnInfo.ConnectionInfo.ServerName = "NNN";
logOnInfo.ConnectionInfo.Password="dong";
logOnInfo.ConnectionInfo.DatabaseName="Lab";
logOnInfo.ConnectionInfo.UserID = "sa";

String path = Server.MapPath("CrystalReport2.rpt");
rpdMy0.Load(path);
rpdMy0.Database.Tables[0].ApplyLogOnInfo(logOnInfo);
CrystalReportViewer1.ReportSource = rpdMy0;
其中:
TableLogOnInfo类是: 提供属性，以便检索和设置表连接选项.它有一个连接的属性ConnectionInfo,用来设置与数据库的连接.如上面的ServerName等.生成一个报表文档对象将前面我们做好的那个CrystalReport1.rpt赋给它.在这里要注意的是Database属性!然后把报表对象做为CrystalReportViewer1的数据源.
或者，获得数据库的方法改为直接从数据库获得DataSet
using System.Data.SqlClient;
using System.Collections.Specialized;
string strConn=System.Configuration.ConfigurationSettings.AppSettings["DB"].ToString();
using (SqlConnection conn = new SqlConnection(strConn))
{
SqlDataAdapter da = new SqlDataAdapter(strSQL,conn);//strSQL是SQL语言"select * from dbo.table1"
DataSet ds=new DataSet();
da.Fill( ds);
CrystalReport1 cr1 = new CrystalReport1();
cr1.SetDataSource( ds);
CrystalReportViewer1.ReportSource = cr1;
}

如果你用的是水晶报表的推模式，一般不用设置登陆信息，但是要这样写：obj.SetDataSource(this.ds.Tables["tablename"]);如果你写成了obj.SetDataSource(this.ds)就会有登陆框的。

如果你用的是水晶报表的拉模式，你就一定要写上登陆信息：

crReportDocument = new OracleReport();

//Set the crConnectionInfo with the current values stored in the report
crConnectionInfo = crReportDocument.Database.Tables[0].LogOnInfo.ConnectionInfo;

/* Populate the ConnectionInfo Objects Properties with the appropriate values for
the ServerName, User ID, Password and DatabaseName. However, since Oracle
works on Schemas, Crystal Reports does not recognize or store a DatabaseName.
Therefore, the DatabaseName property must be set to a BLANK string. */
crConnectionInfo.DatabaseName = "";
crConnectionInfo.ServerName = "Your Server Name";
crConnectionInfo.UserID = "Your User ID";
crConnectionInfo.Password = "Your Password";

//Set the CrDatabase Object to the Report's Database
crDatabase = crReportDocument.Database;

//Set the CrTables object to the Tables collection of the Report's dDtabase
crTables = crDatabase.Tables;

//Loop through each Table object in the Tables collection and apply the logon info
//specified ealier. Note this sample only has one table so the loop will only execute once
foreach (Table crTable in crTables)
{
crTableLogOnInfo = crTable.LogOnInfo;
crTableLogOnInfo.ConnectionInfo = crConnectionInfo;
crTable.ApplyLogOnInfo (crTableLogOnInfo);

// if you wish to change the schema name as well, you will need to set Location property as follows:
// crTable.Location = "<new schema name>." + crTable.Name;
}

//Set the ReportSource of the CrystalReportViewer to the strongly typed Report included in the project
crystalReportViewer1.ReportSource = crReportDocument;

还有一点要注意：
如果你用到了子报表，一定要处理：

//Go through each sections in the main report and identify the subreport by name
crSections = crReportDocument.ReportDefinition.Sections;

foreach(Section crSection in crSections)
{
crReportObjects = crSection.ReportObjects;
//loop through all the report objects to find all the subreports
foreach(ReportObject crReportObject in crReportObjects)
{
if (crReportObject.Kind == ReportObjectKind.SubreportObject)
{
//you will need to typecast the reportobject to a subreport
//object once you find it
crSubreportObject = (SubreportObject)crReportObject;

//open the subreport object
crSubReportDoc = crSubreportObject.OpenSubreport(crSubreportObject.SubreportName);
//Once the correct subreport has been located pass it the
//appropriate dataset
if(crSubReportDoc.Name == "FirstSub")
{
//crSubReportDoc.Database.Tables[0].SetDataSource(ds);
crSubReportDoc.SetDataSource(ds);
}
}
}
}
crystalReportViewer1.ReportSource = crReportDocument;

同样crSubReportDoc.SetDataSource(ds);改为：crSubReportDoc.SetDataSource(ds.Tables["tablename"]);

本文转自钢钢博客园博客，原文链接：http://www.cnblogs.com/xugang/archive/2007/09/13/892037.html，如需转载请自行联系原作者