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Edit Mode very slow

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Milan Gurung
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Milan Gurung asked on 25 Nov 2008, 02:58 PM
Hi everyone,

I am worried about the response time of the Telerik GRID control. May be I have done something drastically not right. 

Scenario:
Telerik grid is bound to around 100 records. Grid contains around 20 columns and 14 of them will get converted to drop down list when the user pefers to choose edit button. Grid Edit mode is set to GridEditMode.InPlace. Trouble is it is taking long time to appear in Edit mode. The same applies with update button is clicked. Is there any better way to make it load faster? For the firsttime, Grid is bound to dataTable and for subsequent page request is served via ViewState - datatable is stored in viewstate.

Any hint will be deeply appreciated.

Many thanks.
Milan G

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Vlad
Telerik team
answered on 25 Nov 2008, 04:50 PM
Hello Milan,

How many items you have in these dropdowns? Do you use any ajax in your scenario?

Greetings,
Vlad
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Milan Gurung
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answered on 25 Nov 2008, 04:53 PM
Hi Vlad,

Some dropdowns have around 200 items and some have 20-30. Therefore on average each drop down might have 50-60 items bound to it. Yes I am using Ajax.

Thanks a lot.
Milan G
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Vlad
Telerik team
answered on 26 Nov 2008, 06:54 AM
Hello Milan,

Here are two ideas how to optimize your scenario:

1) Use RadComboBox with load on demand for these drop down columns in order to optimize rendered HTML size.

2) Get rid of the ViewState string. On every ajax request the ViewState is transfered between client and server and if you put for example this in Session you will get much faster response. You can check this post for more info how to do this:
http://blogs.telerik.com/vladimirenchev/posts/07-09-25/How_wrong_custom_ViewState_handling_may_harm_more_than_help.aspx

All the best,
Vlad
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Milan Gurung
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answered on 26 Nov 2008, 10:31 AM

HI Vlad,

Thanks for the response.

Background -
Grid is populated with exception records from database - contains problematic records. User can rectify any values in the grid  in Edit Mode. Thus requires me to populate most of the dropdownlist with valid items from other tables in database so user can make changes by selecting them.

a. Loading RadCombox is not possible -  I am using GridDropDownColumn as a column wherever Drop down is required  in edit mode.
b. As per your suggestion I have changed storing dataTable in viewstate to Session.

Unfortunately the performance is unacceptably slow.

Thanks,
Milan G

Following is a code snippet that gives what I am trying to achive.

 

 

<telerik:RadGrid ID="gridException" runat="server" Font-Names="Verdana" Font-Size="8pt"

 

 

ForeColor="SteelBlue" Skin="Web20" BorderWidth="0px" CellPadding="0" GridLines="None" AllowPaging="True" PageSize="100">

 

 

<ItemStyle Wrap="False" Font-Names="Verdana" Font-Size="8pt" />

 

 

<ClientSettings>

 

 

<Resizing AllowColumnResize="True" />

 

 

</ClientSettings>

 

 

<AlternatingItemStyle BackColor="AliceBlue" Font-Names="Verdana" Font-Size="8pt" Wrap="False" />

 

 

<MasterTableView AutoGenerateColumns="False" EditMode="InPlace" Width="100%" DataKeyNames="ExpenditureExceptionID">

 

 

<Columns>

 

 

<telerik:GridEditCommandColumn></telerik:GridEditCommandColumn>

 

 

<telerik:GridTemplateColumn UniqueName="TemplateColumn">

 

 

<ItemTemplate>

 

 

<asp:LinkButton ID="btnDelete" Text="Delete" CommandName="Delete" runat="server"></asp:LinkButton>

 

 

</ItemTemplate>

 

 

<HeaderStyle Width="50px" />

 

 

</telerik:GridTemplateColumn>

 

 

<telerik:GridBoundColumn DataField="ExpenditureExceptionID" HeaderText="ExpenditureExceptionID" ReadOnly="True" Display="False" UniqueName="ExpenditureExceptionID"></telerik:GridBoundColumn>

 

 

<telerik:GridBoundColumn DataField="ExceptionNotes" HeaderText="Exp. Notes" UniqueName="ExceptionNotes" ReadOnly="True"></telerik:GridBoundColumn>

 

 

<telerik:GridBoundColumn DataField="SourceSystemID" HeaderText="Source System" UniqueName="SourceSystemID" ReadOnly="True" Display="False"></telerik:GridBoundColumn>

 

 

<telerik:GridBoundColumn DataField="Items" HeaderText="Items" UniqueName="Items"></telerik:GridBoundColumn>

 

 

<telerik:GridDropDownColumn DataSourceID="SrcForBusiness" DataField="Business" ListTextField="BusinessName" ListValueField="BusinessName" HeaderText="Business" UniqueName="Business"></telerik:GridDropDownColumn>

 

 

<telerik:GridDropDownColumn DataSourceID="SrcForBrand" DataField="Brand" ListTextField="BrandName" ListValueField="BrandName" HeaderText="Brand" UniqueName="Brand"></telerik:GridDropDownColumn>

 

 

<telerik:GridDropDownColumn DataSourceID="SrcForMediaType" DataField="MediaType" ListTextField="MediaName" ListValueField="MediaName" HeaderText="Media Type" UniqueName="MediaType"></telerik:GridDropDownColumn>

 

 

<telerik:GridBoundColumn DataField="ConsumerActivityDesc" HeaderText="ConsumerActivityDesc" UniqueName="ConsumerActivityDesc"></telerik:GridBoundColumn>

 

 

<telerik:GridDropDownColumn DataSourceID="SrcForVendor" DataField="VendorName" ListTextField="VendorName" ListValueField="VendorName" HeaderText="Vendor" UniqueName="VendorName"></telerik:GridDropDownColumn>

 

 

<telerik:GridDropDownColumn DataSourceID="SrcForSupplier" DataField="SupplierName" ListTextField="SupplierName" ListValueField="SupplierName" HeaderText="Supplier" UniqueName="SupplierName"></telerik:GridDropDownColumn>

 

 

<telerik:GridBoundColumn DataField="GlobePONumber" HeaderText="Globe PO Number" UniqueName="GlobePONumber"></telerik:GridBoundColumn>

 

 

<telerik:GridBoundColumn DataField="GoodsReceivedDate" HeaderText="Goods Received Date" UniqueName="GoodsReceivedDate"></telerik:GridBoundColumn>

 

 

<telerik:GridBoundColumn DataField="Currency" HeaderText="Currency" UniqueName="Currency" ReadOnly="true"></telerik:GridBoundColumn>

 

 

<telerik:GridBoundColumn DataField="GRCosts" HeaderText="GR Costs" UniqueName="GRCosts"></telerik:GridBoundColumn>

 

 

<telerik:GridBoundColumn DataField="NetCost" HeaderText="Net Cost" UniqueName="NetCost"></telerik:GridBoundColumn>

 

 

</Columns>

 

 

<EditFormSettings>

 

 

<EditColumn UniqueName="EditCommandColumn1">

 

 

</EditColumn>

 

 

</EditFormSettings>

 

 

<RowIndicatorColumn>

 

 

<HeaderStyle Width="20px" />

 

 

</RowIndicatorColumn>

 

 

<ExpandCollapseColumn>

 

 

<HeaderStyle Width="20px" />

 

 

</ExpandCollapseColumn>

 

 

</MasterTableView>

 

 

<FilterMenu EnableTheming="True" Skin="Web20">

 

 

<CollapseAnimation Duration="200" Type="OutQuint" />

 

 

</FilterMenu>

 

 

<PagerStyle Mode="NextPrevAndNumeric" Position="TopAndBottom" />

 

 

</telerik:RadGrid><br />

 

 


<
asp:Button ID="btnSubmitBatch" runat="server" CssClass="buttonFont" Text="Submit Batch" />&nbsp;<asp:Button

 

 

ID="btnDeleteBatch" runat="server" CssClass="buttonFont" Text="Discard Batch" /><br />

 

 

<asp:ObjectDataSource ID="SrcForBusiness" runat="server" SelectMethod="GetAllBusinessName"

 

 

TypeName="ProjectTemplar.BusinessPillarManager"></asp:ObjectDataSource>

 

 

<asp:ObjectDataSource ID="SrcForBrand" runat="server" SelectMethod="GetAllBrandName"

 

 

TypeName="ProjectTemplar.BrandManager"></asp:ObjectDataSource>

 

 

<asp:ObjectDataSource ID="SrcForVendor" runat="server" SelectMethod="GetAllVendor" TypeName="ProjectTemplar.VendorManager"></asp:ObjectDataSource>

 

 

<asp:ObjectDataSource ID="SrcForSupplier" runat="server" SelectMethod="GetAllSupplier"

 

 

TypeName="ProjectTemplar.SupplierManager"></asp:ObjectDataSource>

 

 

<asp:ObjectDataSource ID="SrcForMediaType" runat="server" SelectMethod="GetAllMedia"

 

 

TypeName="ProjectTemplar.MediaManager"></asp:ObjectDataSource>

 

</

asp:Content>

 

 

.....

And the corresponding page behind code...

 

Private

ReadOnly Property GridSource() As DataTable

 

 

'Storing dataTable in session rather than in ViewState

 

 

 Get

 

 

 'Dim obj As Object = Me.ViewState("_gds")

 

 

 'If (Not obj Is Nothing) Then

 

 

 'Return CType(obj, DataTable)

 

 

 Dim obj As Object = Session.Item("dTable")

 

 

If (Not obj Is Nothing) Then

 

 

 Return CType(obj, DataTable)

 

 

Else

 

 

 Dim table As DataTable = Nothing

 

 

 Try

 

 

 Dim ds As DataSet = Nothing

 

 

 Dim manager As New ExpenditureDataManager()

 

ds = manager.GetExpenditureExceptionsByBatchIDForMediaAgency(m_batchID)

table = ds.Tables(0)

 

'Me.ViewState("_gds") = table

 

 

 Session.Add("dTable", table)

 

 

Return table

 

 

Catch ex As Exception

 

lblErrorMsg.Text = ex.Message

 

End Try

 

 

 

 

 

Return table

 

 

End If

 

 

 End Get

 

 

 

 

 

End Property

 

 

 

 

 

Protected Sub gridException_NeedDataSource(ByVal source As System.Object, ByVal e As Telerik.Web.UI.GridNeedDataSourceEventArgs) Handles gridException.NeedDataSource

 

 

If Me.GridSource.Rows.Count = 0 Then

 

 

 Response.Redirect("ImportStatus.aspx")

 

 

End If

 

 

 gridException.DataSource = Me.GridSource

 

 

End Sub

 

 


 

0
Rosen
Telerik team
answered on 01 Dec 2008, 02:59 PM
Hello Milan Gurung,

I highly recommend you to consider using a LoadOnDemand feature of RadComboBox control. I have attached a sample page which demonstrates a vary simple implementation of how to set a GridDropDownColumn to use a LoadOnDemand feature of RadComboBox.

Please give it a try and let us know if this helps.

Best wishes,
Rosen
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Milan Gurung
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answered on 01 Dec 2008, 03:27 PM
Hi Rosen,

Thanks for the code - I got the problem @ editor.ComboBoxControl.ItemsRequested += ComboBoxControl_ItemsRequested;
ItemsRequested is not recognised. By the way is it possible to equivalent vb.net code. I code convertor but not that impressive.

Thanks a lot.
Regards,
Milan G
0
Rosen
Telerik team
answered on 02 Dec 2008, 04:33 PM
Hello Milan,

Please find attached the same sample page translated to vb. Let us know if this helps.

Best wishes,
Rosen
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Milan Gurung
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answered on 04 Dec 2008, 10:34 AM
Rosen,
Many thanks for the code - will update you the status.

Cheers,
Milan G
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Milan Gurung
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Vlad
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Milan Gurung
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