如何在c#win form app中设置Sub crystal report的数据源

Question

我正在使用此代码在主报表中加载主报表和子报表.主报告是空白报告,只包含子报告.

这是我的代码:

MySqlConnection cnn;
string connectionString = null;
string sql = null;

connectionString = "Server = BC; Database = mydb1; Uid = root; Pwd = abc123;";
cnn = new MySqlConnection(connectionString);
cnn.Open();

sql = "SELECT * from mytable1 ";
MySqlDataAdapter dscmd = new MySqlDataAdapter(sql, cnn);
DataSet1 ds = new DataSet1();
dscmd.Fill(ds, "Imagetest");
cnn.Close();

ReportDocument cryRpt = new ReportDocument();
cryRpt.Load("C:/Subreport.rpt");
cryRpt.SetDataSource(ds.Tables[1]);

crystalReportViewer1.ReportSource = "C:/MainReport.rpt";
crystalReportViewer1.Refresh();

当我运行应用程序时,我只看到带有空白子报表的主报表.

Answer 1

ReportDocument cryRpt = new ReportDocument();
cryRpt.Load("C:/MainReport.rpt");
cryRpt.DataSourceConnections.Clear();
cryRpt.SetDataSource(ds.Tables[0]);
cryRpt.Subreports[0].DataSourceConnections.Clear();
cryRpt.Subreports[0].SetDataSource(ds.Tables[0]);
crystalReportViewer1.ReportSource = cryRpt;
crystalReportViewer1.Refresh();