C# Code:

XtraReport mReport = new XtraReport();
mReport.LoadLayout(Application.StartupPath @"\Reports\" @"rptSO.repx"); //报表模板文件

//取报表数据
DataSet ds = new bllSO().GetReportData(txtNoFrom.Text, txtNoTo.Text, txtDateFrom.DateTime, txtDateTo.DateTime);

//查找组件
GroupHeaderBand GroupHeader1 = mReport.FindControl("GroupHeader1", true) as GroupHeaderBand;
DetailReportBand DetailReport = mReport.FindControl("DetailReport", true) as DetailReportBand;
DetailBand Detail1 = mReport.FindControl("Detail1", true) as DetailBand;
XRLabel xrLabel15 = mReport.FindControl("XRLabel15", true) as XRLabel;
XRLabel xrLabel23 = mReport.FindControl("XRLabel23", true) as XRLabel;

//重要！！！给组(GroupHeader)绑定主键字段
//本报表是按业务单号分组
GroupField gf = new GroupField("SONO", XRColumnSortOrder.Ascending);
GroupHeader1.GroupFields.Add(gf);

//给数据集建立主外键关系
DataColumn parentColumn = ds.Tables["tb_SO"].Columns["SONO"];
DataColumn childColumn = ds.Tables["tb_SOs"].Columns["SONO"];
DataRelation R1 = new DataRelation("R1", parentColumn, childColumn);
ds.Relations.Add(R1);

//绑定主表的数据源
mReport.DataMember = "tb_SO";
mReport.DataSource = ds;

//绑定明细表的数据源
DetailReport.DataMember = "R1";
DetailReport.DataSource = ds;

//自动绑定明细表XRLabel的数据源
BindingFields(ds, Detail1.Controls);

xrLabel15.DataBindings.Add("Text", ds, "R1.Amount");//绑定小计(当前单据的总金额)
xrLabel23.DataBindings.Add("Text", ds, "R1.Amount");//绑定总计(所有单据的总金额)


//来源:C/S框架网(www.csframework.com) QQ:1980854898