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[Solved] ViewState Error after Edit and Accept followed by Cancel in Hierarchy Detail Grid

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Grid

This is a migrated thread and some comments may be shown as answers.

Neal asked on 03 Jun 2009, 01:37 PM

Hi all,

Bit baffled here,..new one on me.
My Detail Grid Inserts fine,
If I go into edit mode, I can edit the record, and "Accept" it, ...fine...but, ...on "Cancel" to get outta edit mode,...I get this,...(and no Postback that i can see (well not at PageLoad event anyway.))

Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.

I have tried trimming most code behind out to see if that was causing it,...Problem persists.
(The code behind just shows selected vals from/in a dropdown, in Ins and Edit mode otherwise that selected val in a label of that col.

And, ...I do not add any controls dynamically, nor move them about...
Thanks Neal

Markup is as follows:

<telerik:RadGrid ID="GrvTask" runat="server"

AutoGenerateColumns="False"

AllowAutomaticUpdates="False"

AllowAutomaticDeletes="False"

AllowAutomaticInserts="False"

AllowSorting="True"

ShowStatusBar="True"

CssClass="GridVClass"

Width="100%"

Height="100%" CellPadding="4"

GridLines="None" AllowPaging="True"

Visible="true"

OnInsertCommand="GrvTask_InsertCommand"

OnNeedDataSource="GrvTask_NeedDataSource"

OnUpdateCommand="GrvTask_UpdateCommand"

OnDeleteCommand="GrvTask_DeleteCommand"

OnSelectedIndexChanged="GrvTask_SelectedIndexChanged"

OnItemCommand="GrvTask_ItemCommand"

EnableTheming="False"

OnItemDataBound="GrvTask_ItemDataBound"

OnDetailTableDataBind="GrvTask_DetailTableDataBind"

PageSize="20">

<MasterTableView

CommandItemDisplay="Top"

DataKeyNames=" TaskId"

EditMode="InPlace">

<telerik:GridTableView

Name="TaskItems"

BorderColor="Gray"

BorderStyle="solid"

BorderWidth="1px"

BackColor="LemonChiffon"

HeaderStyle-BackColor="LemonChiffon"

ItemStyle-BackColor="White"

AlternatingItemStyle-BackColor="GhostWhite"

CommandItemDisplay="Top"

CommandItemStyle-BackColor="LemonChiffon"

CommandItemStyle-BorderColor="Gray"

CommandItemStyle-BorderStyle="solid"

CommandItemStyle-BorderWidth="1px"

AllowPaging="true"

PageSize="6"

EditMode="inPlace"

Width="100%" runat="server"

DataKeyNames="Id">

<telerik:GridEditCommandColumn ButtonType="ImageButton"

UpdateImageUrl="../../App_Themes/Images/Update.gif"

EditImageUrl="../../App_Themes/Images/EditIcn.gif"

InsertImageUrl="../../App_Themes/Images/Insert.gif"

HeaderText="Edit"

CancelImageUrl="../../App_Themes/Images/Cancel.gif">

</telerik:GridEditCommandColumn>

<telerik:GridBoundColumn DataField="Name"

HeaderText="Task Name" UniqueName="Name">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="SeqNo"

HeaderText="SeqNo" UniqueName="SeqNo">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="AmtNote"

HeaderText="Amt." UniqueName="AmtNote">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="OfNote"

HeaderText="Amt. Of" UniqueName="OfNote">

</telerik:GridBoundColumn>

<telerik:GridTemplateColumn UniqueName="TemplateColumn"

HeaderText="Priority" >

<asp:Label id="lblPriority" runat="server">

# TaskItemId %>

</asp:Label>

</ItemTemplate>

<asp:DropDownList ID="ddlPriority" runat="server"

AutoPostBack="true"

OnSelectedIndexChanged="ddlPriority_SelectedIndexChanged"

OnDataBinding = "ddlPriority_DataBindingR"

Width="100%"

style="z-index:1000"

</EditItemTemplate>

</telerik:GridTemplateColumn>

<telerik:GridButtonColumn

HeaderText="View Notes"

UniqueName ="ShowNotes"

ButtonType="ImageButton"

ImageUrl="../../Images/ViewNotes.gif"

CommandName="TaskItemNotes"

AutoPostBackOnFilter ="True">

</telerik:GridButtonColumn>

<telerik:GridTemplateColumn

HeaderText="View Contacts"

UniqueName ="Contacts"

DataField="Select" AutoPostBackOnFilter ="True">

<img src="../../App_Themes/Images/Docs/document_info_64.png"

onclick="OpenAllocatedContacts('<%# DataBinder.Eval(Container.DataItem, "Id") %>');

return false;"

</ItemTemplate>

</telerik:GridTemplateColumn>

<telerik:GridButtonColumn ConfirmText="Are you sure you want to deallocate this taskItem?"

ButtonType="ImageButton"

ImageUrl="../../App_Themes/Images/Delete.gif"

CommandName="Delete" Text="Delete"

UniqueName="DeleteColumn" HeaderText="Delete">

</telerik:GridButtonColumn>

</Columns>

</telerik:GridTableView>

</DetailTables>

<telerik:GridEditCommandColumn ButtonType="ImageButton"

UpdateImageUrl="../../App_Themes/Images/Update.gif"

EditImageUrl="../../App_Themes/Images/EditIcn.gif"

InsertImageUrl="../../App_Themes/Images/Insert.gif"

HeaderText="Edit"

CancelImageUrl="../../App_Themes/Images/Cancel.gif">

</telerik:GridEditCommandColumn>

<telerik:GridBoundColumn DataField="Name"

HeaderText="Task Name" UniqueName="Name">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="SeqNo"

HeaderText="SeqNo" UniqueName="SeqNo">

</telerik:GridBoundColumn>

<telerik:GridTemplateColumn UniqueName="TemplateColumn"

HeaderText="Priority" >

<asp:Label id="lblPriority" runat="server">

# SPlanId %>

</asp:Label>

</ItemTemplate>

<asp:DropDownList ID="ddlPriority" runat="server"

AutoPostBack="true"

OnSelectedIndexChanged="ddlPriority_SelectedIndexChanged"

OnDataBinding = "ddlPriority_DataBindingR"

Width="100%"

style="z-index:1000"

</EditItemTemplate>

</telerik:GridTemplateColumn>

<telerik:GridButtonColumn

HeaderText="View Notes"

UniqueName ="ShowNotes"

ButtonType="ImageButton"

ImageUrl="../../Images/ViewNotes.gif"

CommandName="vNotes"

AutoPostBackOnFilter ="True">

</telerik:GridButtonColumn>

<telerik:GridButtonColumn ConfirmText="Are you sure you want to deallocate this task?"

ButtonType="ImageButton"

ImageUrl="../../App_Themes/Images/Delete.gif"

CommandName="Delete" Text="Delete"

UniqueName="DeleteColumn" HeaderText="Delete">

</telerik:GridButtonColumn>

</Columns>

<table width="100%" style="border-right: #003333 thin solid; border-top: #003333 thin solid;

padding-bottom: 2px; margin: 1px; border-left: #003333 thin solid; padding-top: 2px;

border-bottom: #003333 thin solid"

bordercolor="#336666">

<tr>

<asp:LinkButton ID="LinkButton2"

runat="server"

OnClientClick="OpenUnallocatedTasks();return false;">

<img style="border:0px"

alt=""

src="../../RadControls/Grid/Skins/AddRecord.gif"

/>Allocate Tasks

</asp:LinkButton>

</td>

<asp:LinkButton ID="LinkButton4" runat="server" CommandName="Re bindGrid">

Refresh

</asp:LinkButton>

</td>

</tr>

</table>

</CommandItemTemplate>

</MasterTableView>

</ClientSettings>

</telerik:RadGrid>

[Solved] ViewState Error after Edit and Accept followed by Cancel in Hierarchy Detail Grid

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