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"]);