Failed to Load Viewstate Error

[scottcly]

I have a simple editor with a Gridview and a DetailsView. The Gridview handles DELETE and the DetailsView handles UPDATE and ADD. A panel around each one and some minor event handling is used to control which one is visible based on buttons pushed. I can do single operations, but I get an error when I click SELECT on the GRIDVIEW, then UPDATE on the DetailsView then SELECT on the Gridview again.

I will have to send the script in a follow-on message, but here are the code behind and the error details.

Thanks.

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
 
public partial class Member_Administrator_Product_States : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
 
    }
  protected void cmdAdd_Click(object sender, EventArgs e)
  {
    pnlGrid.Visible = false;
    DetailsView1.ChangeMode(DetailsViewMode.Insert);
    pnlDetail.Visible = true;
  }
  protected void cmdSelect_Click(object sender, EventArgs e)
  {
    pnlGrid.Visible = false;
    DetailsView1.ChangeMode(DetailsViewMode.Edit);
    pnlDetail.Visible = true;
  }
  protected void DetailsView1_ItemUpdated(object sender, DetailsViewUpdatedEventArgs e)
  {
    if (e.Exception != null)
    {
      lblErrorMsg.Text = "Invalid data. Please correct and try again.";
      e.ExceptionHandled = true;
      e.KeepInEditMode = true;
    }
    else if (e.AffectedRows == 0)
      lblErrorMsg.Text = "Another user updated that category. Please try again.";
  }
  protected void DetailsView1_ItemDeleted(object sender, DetailsViewDeletedEventArgs e)
  {
    if (e.Exception != null)
    {
      lblErrorMsg.Text = e.Exception.Message;
      e.ExceptionHandled = true;
    }
    else
      if (e.AffectedRows == 0)
        lblErrorMsg.Text = "Another user updated that category. Please try again.";
  }
  protected void DetailsView1_ItemInserted(object sender, DetailsViewInsertedEventArgs e)
  {
    if (e.Exception != null)
    {
      lblErrorMsg.Text = "Invalid data. Please correct and try again.";
      e.ExceptionHandled = true;
      e.KeepInInsertMode = true;
    }
    else if (e.AffectedRows == 0)
      lblErrorMsg.Text = "Another user updated that category. Please try again.";
  }
  protected void DetailsView1_ItemCommand(object sender, DetailsViewCommandEventArgs e)
  {
    switch (e.CommandName) { 
      case "Cancel":
      case "Update":
      case "Insert":
        pnlGrid.Visible = true;
        pnlDetail.Visible = false;
        break;
      default:
        break;
    }
  }
} 

[HttpException (0x80004005): 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.]
System.Web.UI.Control.LoadViewStateRecursive(Objec t savedState) +355
System.Web.UI.Control.LoadChildViewStateByIndex(Ar rayList childState) +142
System.Web.UI.Control.LoadViewStateRecursive(Objec t savedState) +303
System.Web.UI.Control.LoadChildViewStateByIndex(Ar rayList childState) +142
System.Web.UI.Control.LoadViewStateRecursive(Objec t savedState) +303
System.Web.UI.Control.LoadChildViewStateByIndex(Ar rayList childState) +142
System.Web.UI.Control.LoadViewStateRecursive(Objec t savedState) +303
System.Web.UI.Control.LoadChildViewStateByIndex(Ar rayList childState) +142
System.Web.UI.Control.LoadViewStateRecursive(Objec t savedState) +303
System.Web.UI.Control.LoadChildViewStateByIndex(Ar rayList childState) +142
System.Web.UI.Control.LoadViewStateRecursive(Objec t savedState) +303
System.Web.UI.Control.LoadChildViewStateByIndex(Ar rayList childState) +142
System.Web.UI.Control.LoadViewStateRecursive(Objec t savedState) +303
System.Web.UI.Control.LoadChildViewStateByIndex(Ar rayList childState) +142
System.Web.UI.Control.LoadViewStateRecursive(Objec t savedState) +303
System.Web.UI.Control.LoadChildViewStateByIndex(Ar rayList childState) +142
System.Web.UI.Control.LoadViewStateRecursive(Objec t savedState) +303
System.Web.UI.Control.LoadChildViewStateByIndex(Ar rayList childState) +142
System.Web.UI.Control.LoadViewStateRecursive(Objec t savedState) +303
System.Web.UI.Control.LoadChildViewStateByIndex(Ar rayList childState) +142
System.Web.UI.Control.LoadViewStateRecursive(Objec t savedState) +303
System.Web.UI.Page.LoadAllState() +505
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2543

[scottcly]

I am a first-time poster and am having trouble posting the script. I get the following message even though there are no image tags in my script or my signature.

You have included too many images in your signature or in your previous post. Please go back and correct the problem and then continue again.

Images include use of smilies, the vB code [img] tag and HTML <img> tags. The use of these is all subject to them being enabled by the administrator.

[scottcly]

Here is the GridView portion of the script:

      <asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True" AutoGenerateColumns="False" DataSourceID="odsState" DataKeyNames="StateID">
        <Columns>
          <asp:TemplateField ShowHeader="False">
            <HeaderTemplate>
              <asp:Button ID="cmdAdd" runat="server" CausesValidation="False" CommandName="Add" Text="Add" Width="60" OnClick="cmdAdd_Click" />
            </HeaderTemplate>
            <ItemTemplate>
              <asp:Button ID="cmdSelect" runat="server" CausesValidation="False" CommandName="Select" Width="60" Text="Select" OnClick="cmdSelect_Click" />
            </ItemTemplate>
          </asp:TemplateField>
          <asp:TemplateField ShowHeader="False">
            <ItemTemplate>
              <asp:Button ID="Button1" runat="server" CausesValidation="False" CommandName="Delete" Text="Delete" Width="60" OnClientClick="return confirm('Are you sure you want to delete this record?');" />
            </ItemTemplate>
          </asp:TemplateField>
          <asp:BoundField DataField="StateID" HeaderText="StateID" InsertVisible="False" ReadOnly="True" SortExpression="StateID" Visible="False" />
          <asp:BoundField DataField="StateDesc" HeaderText="State" SortExpression="StateDesc" />
          <asp:BoundField DataField="StateAbr" HeaderText="Abbr" SortExpression="StateAbr" />
          <asp:BoundField DataField="ParentDesc" HeaderText="Association" SortExpression="ParentDesc" />
          <asp:CheckBoxField DataField="IsActive" HeaderText="Active?" SortExpression="IsActive" />
        </Columns>
      </asp:GridView>
    <asp:ObjectDataSource ID="odsState" runat="server" DeleteMethod="Delete" OldValuesParameterFormatString="{0}" SelectMethod="GetData" TypeName="tblStateTableAdapters.usp_Sel_tblStateTableAdapter">
      <DeleteParameters>
        <asp:Parameter Name="StateID" Type="Int32" />
      </DeleteParameters>
      <SelectParameters>
        <asp:Parameter Name="StateID" Type="Int32" />
      </SelectParameters>
    </asp:ObjectDataSource>
 

[scottcly]

Here are the two ObjectDataSources associated with the DetailsView script:

    <asp:ObjectDataSource ID="odsOneState" runat="server" InsertMethod="Insert" OldValuesParameterFormatString="{0}" SelectMethod="GetData" TypeName="tblStateTableAdapters.usp_Sel_tblStateTableAdapter" UpdateMethod="Update">
      <UpdateParameters>
        <asp:Parameter Name="StateID" Type="Int32" />
        <asp:Parameter Name="StateDesc" Type="String" />
        <asp:Parameter Name="StateAbr" Type="String" />
        <asp:Parameter Name="ParentID" Type="Int32" />
        <asp:Parameter Name="IsStateChoice" Type="Boolean" />
        <asp:Parameter Name="IsActive" Type="Boolean" />
      </UpdateParameters>
      <SelectParameters>
        <asp:ControlParameter ControlID="GridView1" Name="StateID" PropertyName="SelectedValue" Type="Int32" />
      </SelectParameters>
      <InsertParameters>
        <asp:Parameter Name="StateDesc" Type="String" />
        <asp:Parameter Name="StateAbr" Type="String" />
        <asp:Parameter Name="ParentID" Type="Int32" />
        <asp:Parameter Name="IsStateChoice" Type="Boolean" />
        <asp:Parameter Name="IsActive" Type="Boolean" />
      </InsertParameters>
    </asp:ObjectDataSource>
 <asp:ObjectDataSource ID="odsActiveAssociations" runat="server" OldValuesParameterFormatString="original_{0}"
    SelectMethod="GetData" TypeName="uspActiveAssociationsTableAdapters.usp_Sel_ActiveAssociationsTableAdapter">
    <SelectParameters>
      <asp:Parameter Name="StateID" Type="Int32" />
    </SelectParameters>
  </asp:ObjectDataSource>

[scottcly]

It is the actual script for the DetailsView that I cannot seem to post although I have no image tags.