如何在水晶报表中为主明细表设置子报表的数据源

Question

I've these two tables, I want to generate a crystal report in which I've a sub report listing all the orders by store. But I'm having problem setting data source of sub report.

ReportsDataSetTableAdapters.StoreTableAdapter adp = new ReportsDataSetTableAdapters.StoreTableAdapter();
MainOrderReport report = new MainOrderReport();
ReportsDataSetTableAdapters.OrderTableAdapter del = new ReportsDataSetTableAdapters.OrderTableAdapter();
report.Subreports[0].SetDataSource(del.GetData().DefaultView);
report.SetDataSource(adp.GetData().DefaultView);
crystalReportViewer.ReportSource = report;
crystalReportViewer.Refresh();

But this code is throwing this exception: "Failed to enable constraints. One or more rows contain values violating non-null, unique or foreign-key constraints". Kindly help me, what I'm missing here.

Answer 1

Try clearing the connection first:

report.Subreports[0].DataSourceConnections.Clear();
report.Subreports[0].SetDataSource(adp.GetData().DefaultView);
crystalReportViewer1.ReportSource = report;
crystalReportViewer1.Refresh();

Answer 2

As per your given DataSet image, your OrderDataTable is child of StoreDataTable . While in your code you are filling your child first and parent later. And in your DataSet you have defined a constraint between the two tables.

Probably this is the reason why you are getting this error. Try filling the parent Table first, then child Table.