不明白具体步骤的,参见:http://www.cnblogs.com/AXzhz/services/trackbacks/700305.aspx
方法一:建数据源,数据集,在ReportViewer里简单设置下就可以运行了.

方法二:
把上图的Data Source Instance都设置为none,
在后台添加如下代码,

privatevoidForm1_Load(objectsender, EventArgs e)
{
stringss=@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Documents and Settings\AXzhz\My Documents\Visual Studio 2005\Projects\AX\WindowsApplication10\WindowsApplication10\DataBase1.mdb;Persist Security Info=False";
            OleDbConnection con=newOleDbConnection(ss);
            OleDbDataAdapter da=newOleDbDataAdapter("Select * from Table1", con);
            OleDbDataAdapter da1=newOleDbDataAdapter("Select * from Table2", con);
            DataSet ds=newDataSet();
            da.Fill(ds,"Table1");
            da1.Fill(ds,"Table2");

this.reportViewer1.LocalReport.DataSources.Add(newReportDataSource("DS_Table1", ds.Tables[0]));
this.reportViewer1.LocalReport.DataSources.Add(newReportDataSource("DS_Table2", ds.Tables[1]));

this.reportViewer1.LocalReport.ReportEmbeddedResource="WindowsApplication10.Report1.rdlc";

this.reportViewer1.RefreshReport();
        }