rdlc报表的钻取 求教

//报表钻取
        protected void ReportViewer1_Drillthrough(object sender, DrillthroughEventArgs e)
        {
            //Convert.ToString(ERCBasicInfoBLL.SelectCodeName(basicinfo.ProvCode)) + Convert.ToString(ERCBasicInfoBLL.SelectCodeName(basicinfo.WorkItemAreaCode)) + Convert.ToString(ERCBasicInfoBLL.SelectCodeName(basicinfo.CountyCode));
            LocalReport lp = (LocalReport)e.Report;
            string custdate = lp.GetParameters()["date"].Values[0].Trim();

                       DataTable datas1 = new DataTable();

            datas1.Columns.Add("erccode", typeof(string));
            datas1.Columns.Add("ercname", typeof(string));
            datas1.Columns.Add("tphone", typeof(string));
            datas1.Columns.Add("address", typeof(string));
            datas1.Columns.Add("noid", typeof(string));
            datas1.Columns.Add("createtime", typeof(string));
            datas1.Columns.Add("createaddress", typeof(string));
            datas1.Columns.Add("status", typeof(int));
            datas1.Columns.Add("isPubTB", typeof(int));
            datas1.Columns.Add("isStaTB", typeof(int));


            DataTable BasicTB = ERCBasicInfoBLL.GetBasiEdits(custdate);
            foreach (DataRow dr in BasicTB.Rows)
            {
                DataRow dra = datas1.NewRow();
                dra["erccode"] = dr["ERCCode"];
                dra["ercname"] = dr["ERCName"];
                dra["tphone"] = dr["ContactPhone"];
                dra["address"] = dr["Address"];
                dra["noid"] = dr["LegalPersonCardNum"];
                dra["createtime"] = dr["CreateTime"];
                datas1.Rows.Add(dra);
            }


            //lp.DataSources.Clear(); 
 
            //lp.ReportEmbeddedResource = "StatisticalAnalysis.ReportTemplate.Analysis1.rdlc";
            lp.ReportPath = @"StatisticalAnalysis\ReportTemplate\Analysis1.rdlc";
            lp.DataSources.Add(new ReportDataSource("anaDataSet_analysis1", datas1));

        }

我有两个数据集anaDataSet_analysis anaDataSet_analysis1
第一次是anaDataSet_analysis

第二次点连接的时候 anaDataSet_analysis1

为什么他会显示第一个 数据集“尚未为数据源“anaDataSet_analysis”提供数据源实例。 ”


就是转不下去啊




[解决办法]
lp.DataSources 这个数据源设定好了没？先要有数据源 才能放数据集的