c# - 如何在C#Win Form应用程序中设置Sub Crystal报表的数据源

Question

我正在使用此代码在主报告中加载主报告和子报告。主报告是空白报告，仅包含子报告。

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();

当我运行该应用程序时，我只会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();