获得对报表文件里的对象(比如TextObject)的引用

ReportDocument report=new ReportDocument();
           
 //加载报表
report.Load(Server.MapPath("xx.rpt"));
           
//获得对DetailSection1节title标签对象的引用
TextObject to = 
    report.ReportDefinition.Sections["DetailSection1"].ReportObjects["title"] As TextObject;

//设置title标签的值
to.Text="新文本值";