Hi All,
I have a WHDG bound to a WebHierarchicalDataSource with a list of custom entities. The design on the grid is as follows:
<ig:WebHierarchicalDataGrid ID="uxDynamicContentsGrid" runat="server" Width="550px" Height="750px"
AutoGenerateBands="False" AutoGenerateColumns="False" EnableAJAX="false"
DataMember="DCDetails" Key="DCDetails" EnableDataViewState="false"
DataKeyFields="DynamicContentViewId"
GroupingSettings-ShowRemoveButton="False" StyleSetName="Office2007Silver"
GroupingSettings-GroupedRowTextMask="{1}" ShowHeader="False">
<EmptyRowsTemplate>There are no groups/ dynamic content assigned to the selected view.</EmptyRowsTemplate>
<GroupingSettings EnableColumnGrouping="True" GroupAreaVisibility="Hidden" ShowRemoveButton="False">
<RemoveButton AltText="Ungroup Column" />
</GroupingSettings>
<Behaviors>
<ig:Sorting Enabled="false"></ig:Sorting>
<ig:Activation>
</ig:Activation>
<ig:EditingCore AutoCRUD="False">
<ig:CellEditing>
<ColumnSettings>
<ig:EditingColumnSetting ColumnKey="DynamicContentName" ReadOnly="true" />
</ColumnSettings>
</ig:CellEditing>
<ig:RowDeleting />
</Behaviors>
</ig:EditingCore>
The grid is bound on every postback (to resolve certain other issues we have). The loading of the grid is as follows:
uxDynamicContentsGrid.Rows.Clear()
uxDynamicContentsGrid.GroupingSettings.EnableColumnGrouping = DefaultableBoolean.False
uxDynamicContentsGrid.GroupingSettings.GroupedColumns.Clear()
uxDynamicContentsGrid.GroupingSettings.ColumnSettings.Clear()
uxDynamicContentsSource.DataRelations.Clear()
uxDynamicContentsSource.DataViews.Clear()
uxDynamicContentsGrid.DataSource = Nothing
uxDynamicContentsGrid.DataBind()
Dim viewId As Integer = uxViewDropDown.SelectedValue
If viewId > 0 Then
contents = entityManager.GetContentsByEntityIdAndViewId(EntityId, viewId)
Else
contents = entityManager.GetContentsByEntityId(EntityId)
End If
' Specify data views
Dim dv As New Infragistics.Web.UI.DataSourceControls.DataView
dv = New Infragistics.Web.UI.DataSourceControls.DataView
dv.ID = "DCDetails"
dv.DataSource = contents
' Add view to datasource
uxDynamicContentsSource.DataViews.Add(dv)
uxDynamicContentsGrid.GroupingSettings.EnableColumnGrouping = DefaultableBoolean.True
' A calculated property OrderedGroupName has been added which returns GroupOrder_ContentOrder_GroupName
Dim setting As New GridControls.ColumnGroupingSetting
setting.ColumnKey = "OrderedGroupName"
setting.GroupComparer = New GroupNameComparer()
uxDynamicContentsGrid.GroupingSettings.ColumnSettings.Add(setting)
uxDynamicContentsGrid.GroupingSettings.GroupedColumns.Add("OrderedGroupName")
uxDynamicContentsGrid.DataSource = uxDynamicContentsSource
THE ISSUE
1. WE are trying to avoid the binding of the grid on every postback. As per, other forum responses, we tried setting the EnableDAtaViewState property of the grid and binding the datasource only if not postback.
However, we are getting all sorts of errors, two of which are below: Does anyone have a working sample of WHDG with EnableDataViewState="true" ? Is there anything we are missing?
2. When RowUpdate event is fired, it causes additional column to appear and changes the heading of the grid. Does WHDG require the datasource to be bound on row update as well?
Thanks!
Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation. Source : System.Web Help link : ParamName : Data : System.Collections.ListDictionaryInternal TargetSite : Void ValidateEvent(System.String, System.String) Stack Trace : at System.Web.UI.ClientScriptManager.ValidateEvent(String uniqueId, String argument) at System.Web.UI.Control.ValidateEvent(String uniqueID, String eventArgument) at System.Web.UI.WebControls.DropDownList.LoadPostData(String postDataKey, NameValueCollection postCollection) at System.Web.UI.WebControls.DropDownList.System.Web.UI.IPostBackDataHandler.LoadPostData(String postDataKey, NameValueCollection postCollection) at System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
Multiple controls with the same ID 'it3_0' were found. FindControl requires that controls have unique IDs. Source : System.Web Help link : ErrorCode : -2147467259 Data : System.Collections.ListDictionaryInternal TargetSite : Void FillNamedControlsTable(System.Web.UI.Control, System.Web.UI.ControlCollection) Stack Trace : at System.Web.UI.Control.FillNamedControlsTable(Control namingContainer, ControlCollection controls) at System.Web.UI.Control.FillNamedControlsTable(Control namingContainer, ControlCollection controls) at System.Web.UI.Control.EnsureNamedControlsTable() at System.Web.UI.Control.FindControl(String id, Int32 pathOffset) at System.Web.UI.Control.FindControl(String id, Int32 pathOffset) at System.Web.UI.Control.FindControl(String id, Int32 pathOffset) at System.Web.UI.Control.FindControl(String id, Int32 pathOffset) at System.Web.UI.Control.FindControl(String id, Int32 pathOffset) at System.Web.UI.Control.FindControl(String id, Int32 pathOffset) at System.Web.UI.Control.FindControl(String id, Int32 pathOffset) at System.Web.UI.Page.FindControl(String id) at System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)