如果一份报表是用来显示分层数据源的数据，则它通常被称为主从报表。本文介绍了在DevExpress XtraReports控件基于DetailReport通过代码绑定主从数据源生成主从报表。以下是报表效果图。

前端设计

前端插入2个嵌套的DetailReport控件。

后端设计

1.获取数据源，并设置两个表主从关系。

        private DataSet GetDataSource()
        {
            DataSet ds = new DataSet();

            string ConStr = SH.Business.Utilities.GetHsLink(ManageProvider.Provider.Current().CompanyId);
            //查询主从2个数据源  
            using (MiniDapper.Database db = new MiniDapper.Database(ConStr, "SqlProvider"))
            {
                string ParentSql = string.Format(@"select A.Id,A.sOrderNo,A.sMaterialLot,A.sMaterialName,A.UserName,A.sCreateTime
from ParentDt A where A.uGuid='{0}'", uGuid);
                var ParentDt = db.GetDataTable(ParentSql);
                ParentDt.TableName = "ParentDt";
                ds.Tables.Add(ParentDt);

                string ChildSql = string.Format(@"select  A.ParentId,A.sCardNo,A.sOrderNo,A.sCustomerName,A.sMaterialLot,A.sMaterialName,A.sColorNo,A.sColorName,A.UserName,A.sCreateTime 
from ChildDt A where A.uGuid='{0}'", uGuid);
                var ChildDt = db.GetDataTable(ChildSql);
                ChildDt.TableName = "ChildDt";
                ds.Tables.Add(ChildDt);
            }
            //给数据集建立主外键关系（主从表）
            DataColumn ParentColumn = ds.Tables["ParentDt"].Columns["Id"];
            DataColumn ChildColumn = ds.Tables["ChildDt"].Columns["ParentId"];
            DataRelation Rel = new DataRelation("RelationColumn", ParentColumn, ChildColumn);
            ds.Relations.Add(Rel);

            return ds;
        }

2.绑定数据到报表文件

public void DataSourceBindings(DataSet ds)
{
    //绑定主表
    DetailReport.DataSource = ds;
    DetailReport.DataMember = "ParentDt";
    lb_sOrderNo.DataBindings.Add("Text", ds, "ParentDt.sOrderNo");
    lb_sMaterialLot.DataBindings.Add("Text", ds, "ParentDt.sMaterialLot");
    lb_sMaterialName.DataBindings.Add("Text", ds, "ParentDt.sMaterialName");
    
    DetailReport1.DataMember = "RelationColumn";
    //绑定从表
    DetailReport1.DataSource = ds;
    this.xc_sCardNo.DataBindings.Add("Text", ds, "RelationColumn.sCardNo");
    this.xc_sColorNo.DataBindings.Add("Text", ds, "RelationColumn.sColorNo");
    this.xc_sColorName.DataBindings.Add("Text", ds, "RelationColumn.sColorName");
}