try Use
ReportViewer1.RefreshReport()
Like my code..
ReportViewer1.LocalReport.DataSources.Clear()
Dim adaptar As New HotelsDataSetTableAdapters.Rstrnt_Bill_TABLETableAdapter
Dim rstrnt_Table As New HotelsDataSet.Rstrnt_Bill_TABLEDataTable
adaptar.Fill1(rstrnt_Table, vOrder_ID)
ReportViewer1.LocalReport.DataSources.Add(New Microsoft.Reporting.WinForms.ReportDataSource("DataSet1", rstrnt_Table.DefaultView))
ReportViewer1.LocalReport.ReportPath = "Reports\Rstrnt_Bill.rdlc"
ReportViewer1.RefreshReport()