gridview paging does not work

I have two grid viewson my page. I have set AutoPostBack="true" EnableViewState="true" AllowPaging="true" for both of them. They show the page numbers on the bottom of the grid, but when I click on another page number I get this error:
"
Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: 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.
"
I added the following text to the @Page :
validateRequest="false" enableEventValidation="false"

Now the error is gone but I still cannot navigate through pages on any of my grids.

Pleas check my code and suggest corrections.

Thanks.
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" MasterPageFile="Global.master"
    Inherits="_Default" EnableViewState = "true" validateRequest="false" enableEventValidation="false" %>
.......
........

<div class = "caseHistory"><p>      
<asp:UpdatePanel runat="server" ID="UpdatePanel2" ChildrenAsTriggers="false" UpdateMode="Conditional">
                <Triggers>
                    <asp:AsyncPostBackTrigger ControlID="_Search" EventName="Click" />
                    <asp:AsyncPostBackTrigger ControlID="_SubmitCategory" EventName="Click" />
                </Triggers>
                <ContentTemplate>                                                           
                        <h1><asp:Label ID="CaseHistoryHeader" runat="server" Text="Case History"></asp:Label></h1>
                        <asp:GridView ID="gvCaseHistory" runat="server" 
                        EmptyDataText="No History" AutoGenerateColumns="true"
                            AutoPostBack="true" EnableViewState="true" 
                            AllowPaging="true" PageSize="5" CssClass="mGrid"
                            PagerStyle-CssClass="pgr" AlternatingRowStyle-CssClass="alt"
                            OnPageIndexChanging="gvCaseHistory_PageIndexChanging">
                            <PagerSettings Position="Bottom" Mode="NumericFirstLast" 
                                FirstPageText="First" LastPageText="Last"
                                NextPageText="Next" PreviousPageText="Prev" />
                            <PagerStyle HorizontalAlign="Center" />
                        </asp:GridView>                                         
                </ContentTemplate>
                </asp:UpdatePanel>
                </p></div>  
....................
.........................
<div>
                    <asp:UpdatePanel runat="server" ID="UpdatePanel3" ChildrenAsTriggers="false" UpdateMode="Conditional">
                        <Triggers>
                            <asp:AsyncPostBackTrigger ControlID="TimerCaseQueueRefresh" EventName="Tick" />
                            <asp:AsyncPostBackTrigger ControlID="_SubmitCategory" EventName="Click" />
                            <asp:PostBackTrigger ControlID="TextBoxFilter" />
                        </Triggers>
                        <ContentTemplate>                                

                            <asp:GridView ID="gvCaseQueue" runat="server" 
                                AutoPostBack="true" EnableViewState="true"                                
                                EmptyDataText="No Cases Found" CssClass="mGrid"
                                AlternatingRowStyle-CssClass="alt"
                                AutoGenerateColumns="False" 
                                AllowPaging="true" PageSize="20"
                                PagerStyle-CssClass="pgr"                                
                                PagerSettings-Position="Bottom" PagerStyle-HorizontalAlign="Center" 
                                DataSourceID="SqlDataSourceCaseQueue"
                                OnPageIndexChanging="gvCaseQueue_PageIndexChanging">
                                <PagerSettings Position="Bottom" Mode="NumericFirstLast" FirstPageText="First" LastPageText="Last"
                                    NextPageText="Next" PreviousPageText="Prev" />
                                <PagerStyle HorizontalAlign="Center" />
                                <Columns>
                                    <asp:TemplateField HeaderText="Case Queue">
                                        <ItemStyle HorizontalAlign="Center" />
                                        <ItemTemplate>
                                            <a name='<%# Eval("CaseNo") %>' href='Default.aspx?CaseNo=<%# Eval("CaseNo") %>'>
                                                <%# Eval("CaseNo") %></a>
                                        </ItemTemplate>
                                    </asp:TemplateField>
                                    <asp:TemplateField HeaderText="Case Queue">
                                        <ItemStyle HorizontalAlign="Center" />
                                        <ItemTemplate>
                                            <%# Eval("SpecimenType")%>
                                        </ItemTemplate>
                                    </asp:TemplateField>
                                </Columns>
                            </asp:GridView>
                            <asp:SqlDataSource ID="SqlDataSourceCaseQueue" runat="server" ConnectionString='<%$ ConnectionStrings:CSICustom %>'
                                SelectCommand="CytoStats.Get_Case_Queue" SelectCommandType="StoredProcedure"
                                FilterExpression="SpecimenType like '{0}%'">
                                <FilterParameters>
                                    <asp:ControlParameter Name="SpecimenType" ControlID="TextBoxFilter" PropertyName="Text"
                                        ConvertEmptyStringToNull="true" />
                                </FilterParameters>
                            </asp:SqlDataSource>                                       
                      </ContentTemplate>
                    </asp:UpdatePanel>
                </div>

Open in new window

patd1Asked:
Who is Participating?
 
patd1Connect With a Mentor Author Commented:
Paging works if I remove the UpdatePanel. But I need it on the gvCaseQueue because it has to refresh itself on a timer.

I tried setting ChildrenAsTriggers="true" for and the paging works now. :)

However, if I remove validateRequest="false" enableEventValidation="false" from @Page tag, it still gives the same error. Any ideas what are the implications of this code?

Thanks.
0
 
Jini JoseSenior .Net DeveloperCommented:
firstly remove the update panel and then try.
you will get the correct error details.
after rectifying the error add the updatepanel
0
 
Jini JoseSenior .Net DeveloperCommented:
if it works fine without updatepanel then it should work with updatepanel.
0
 
Jini JoseSenior .Net DeveloperCommented:
also please check where you calling the bind grid function. is it inside the page post back ?

also in the page change event, did you bind it again ?
0
 
patd1Author Commented:
I tried setting ChildrenAsTriggers="true"
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.