How to clear radgrid

[Kiran]

Dear there,

Somehow i have to bind the radgrid with using dataset and dataview like

Dim objDV as new dataview = nothing
Dim ds as new dataset

'after calling a function ds got somedata according to paramerters

if ds.table(0).rows.count > 0 then
    objDV = ds.tables(0).defaultview  

    RadGrid1.DataSource = objDv

else
        RadGrid1.DataSource = objDv > objdv IS NOTHING
End if

On pageload, my store procedure get all the default parameter value and grid is binding perfectly, now i am changing the param values and in the dataset i m not getting any tables and records, in this case my objdv is set = nothing but grid is carrying the same old data, not rereshing or clearing the data

where there are no records and i bind the grid like
radgrid.mastertableview.rebind

that disappears the grid

thanks and waiting for your response

please let me know what i m missing here

[Tsvetoslav]

Hi Kiran,

Please, make sure that you are using Advanced databindnig for the RadGrid control as opposed to Simple databinding.

All the best,
Tsvetoslav
the Telerik team

[Kiran]

thanks for your quick response.

I did try with the needdatasource here is my code,

My store procedure returns more than 1 table thats why i m using dataset instedof sqldatasource, Now when i m trying to refresh this grid by combo change, Needdatasource doesnt executed, and grid having the same old records

<telerik:RadGrid ID="RadGrid1" Width="99%" AllowSorting="true" runat="server"  ShowFooter="true" FooterStyle-CssClass="GridColHeadNormal"   >
                                                    <MasterTableView   TableLayout="Fixed"  DataKeyNames="PR_KEY" ClientDataKeyNames="PR_KEY" GroupHeaderItemStyle-Height="25" GroupsDefaultExpanded="true" GroupLoadMode="client"  >

                                                    <Columns>
                                                       <telerik:GridClientSelectColumn UniqueName="ClientSelectColumn" />
                                                       <telerik:GridBoundColumn UniqueName="PR_KEY" DataField="PR_KEY"  ></telerik:GridBoundColumn>

                                                       <telerik:GridBoundColumn  HeaderText="Employees" DataField="Name" UniqueName="Name" ShowFilterIcon="false"
                                                           SortExpression="Name"  AllowFiltering="true" FilterControlWidth="100"
                                                           AutoPostBackOnFilter="true"  />

                                                       <telerik:GridDateTimeColumn ReadOnly="true" DataField="emp_number" HeaderText="Employee Number" ShowFilterIcon="false"
                                                           DataType="System.String" UniqueName="empnumber" AllowFiltering="false"  SortExpression="emp_number" />

                                                       <telerik:GridBoundColumn  DataField="NetPay" DataType="System.Double" UniqueName="NetPay"
                                                           HeaderText="Net Pay" AllowFiltering="false"  SortExpression="NetPay"  ItemStyle-HorizontalAlign="Right">
                                                        </telerik:GridBoundColumn>

                                                       <telerik:GridBoundColumn  HeaderText="keyid" DataField="keyid" UniqueName="keyid" AllowFiltering="false"  />
                                                       <telerik:GridBoundColumn  Aggregate="Count" HeaderText="Status" DataField="status" UniqueName="status" AllowFiltering="false" SortExpression="Status" HeaderTooltip="Click here to Group by this column" />
                                                       <telerik:GridBoundColumn  HeaderText="hds" DataField="hds" UniqueName="hds" AllowFiltering="false"  />

                                                       </Columns>


                                                       </MasterTableView>

                                                       <ClientSettings EnableRowHoverStyle="false" AllowColumnsReorder="false" ReorderColumnsOnClient="false">
                                                       <Selecting AllowRowSelect="true" UseClientSelectColumnOnly="true" />
                                                       <Scrolling SaveScrollPosition="false" UseStaticHeaders="true" ScrollHeight="350" />

                                                       <ClientEvents   /></ClientSettings></telerik:RadGrid>

protected sub RadGrid1_NeedDatasource(byval sender as object, byVal e As Telerik.Web.UI.GridNeedDataSourceEventArgs) Handles RadGrid1.NeedDataSource

        BindGrid()

    End Sub

  

Private Sub BindGrid()

  

        Dim objDv As New System.Data.DataView

        Dim objDs As New System.Data.DataSet

        Dim objPayroll As New Payroll

        Dim objCombo As New Comboclass

  

        'String to get any error returned from COM.

        Dim excep As String = ""

  

        Try

            setCon(CType(objPayroll, Object))

            setCon(CType(objCombo, Object))

            

            RadGrid1.MasterTableView.GetColumn("PR_KEY").Display = False

            RadGrid1.MasterTableView.GetColumn("hds").Display = False

            RadGrid1.MasterTableView.GetColumn("keyid").Display = False

  

            RadGrid1.MasterTableView.GetColumn("ClientSelectColumn").HeaderStyle.Width = Unit.Percentage(2)

            RadGrid1.MasterTableView.GetColumn("PR_KEY").HeaderStyle.Width = Unit.Point(0)

            RadGrid1.MasterTableView.GetColumn("Name").HeaderStyle.Width = Unit.Percentage(12)

            RadGrid1.MasterTableView.GetColumn("empnumber").HeaderStyle.Width = Unit.Percentage(10)

            RadGrid1.MasterTableView.GetColumn("Status").HeaderStyle.Width = Unit.Percentage(15)

            RadGrid1.MasterTableView.GetColumn("NetPay").HeaderStyle.Width = Unit.Percentage(6)

            RadGrid1.MasterTableView.GetColumn("keyid").HeaderStyle.Width = Unit.Point(0)

            RadGrid1.MasterTableView.GetColumn("hds").HeaderStyle.Width = Unit.Point(0)

  

            With objFilter

                If radioGD.Items(0).Selected = True Then

                    .mDeptKey = -1

                    .mGrpKey = -1

                    .mPayPeriod = -1

                ElseIf radioGD.Items(1).Selected = True Then

                    .mDeptKey = -1

                    .mGrpKey = cmbGroup.Items(cmbGroup.SelectedIndex).Value

                    .mPayPeriod = -1

                ElseIf radioGD.Items(2).Selected = True Then

                    .mDeptKey = cmbDepartment.Items(cmbDepartment.SelectedIndex).Value

                    .mGrpKey = -1

                    .mPayPeriod = -1

                ElseIf radioGD.Items(3).Selected = True Then

                    .mDeptKey = -1

                    .mGrpKey = -1

                    .mPayPeriod = cmbPayperiod.Items(cmbPayperiod.SelectedIndex).Value

                End If

                Dim TempDateString As String

                TempDateString = cmbPaydate.Items(cmbPaydate.SelectedIndex).Value

                If IsDate(TempDateString) Then

                    .mPayDate = TempDateString

                End If

                If cmbBankAC.SelectedIndex >= 0 Then

                    .mBankAc = cmbBankAC.Items(cmbBankAC.SelectedIndex).Value

                End If

            End With

  

            objDs = New DataSet

  

            If (objPayroll.GetPayCheckList(objDs, objFilter, excep, 1) = False) Then

                Throw New Exception(excep.ToString)

            End If

  

            objDv = Nothing

            If objDs.Tables(0).Rows.Count > 0 Then

                objDv = objDs.Tables(0).DefaultView

                RadGrid1.DataSource = objDv

            Else

                RadGrid1.DataSource = Nothing

            End If

  

              

        Catch ex As Exception

            DisplayError(ex)

        Finally

            If (Not objCombo Is Nothing) Then

                objCombo.Dispose()

                objCombo = Nothing

            End If

            If (Not objPayroll Is Nothing) Then

                objPayroll.Dispose()

                objPayroll = Nothing

            End If

        End Try

    End Sub

[Tsvetoslav]

Hi Kiran,

In order for you to populate the grid with new data, you need to rebind it, calling its Rebind() method.

Regards,
Tsvetoslav
the Telerik team