Load fires twice. : The Official Microsoft ASP.NET Forums

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Load fires twice.

May 15, 2006 12:53 PM|LINK

I just noticed that after I migrated my project Load event started firing twice and even code in if(!IsPostBack) fires twice.

It seems to be that the reason is that asp.net 2.0 adds Page_Load automatically for Load event and since in 1.1 version there was line like:

this.Load+=new EventHandler(thi.Page_Load);

it is added second time.

For some reason in my case this line wasn't removed by "Convert to Web Application" command.

Just wanted to make sure that I have to do it myself and that this know bug.

Thank you,

Shimon.

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Re: Load fires twice.

May 16, 2006 03:39 PM|LINK

Hi Shimon,

Can you tell me what function contains the line

this.Load+=new EventHandler(thi.Page_Load);

Also, is there any user-added code in that function?

Thanks!

-Mike-

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Re: Load fires twice.

May 16, 2006 05:14 PM|LINK

For a example like this

#region Web Form Designer generated code

override protected void OnInit(EventArgs e)

{

//

// CODEGEN: This call is required by the ASP.NET Web Form Designer.

//

InitializeComponent();

base.OnInit(e);

}

/// <summary>

/// Required method for Designer support - do not modify

/// the contents of this method with the code editor.

/// </summary>

private void InitializeComponent()

{

this.btnSearch.Click += new System.EventHandler(this.btnSearch_Click);

this.grdList.ItemDataBound += new System.Web.UI.WebControls.DataGridItemEventHandler(this.grdList_ItemDataBound);

this.Load += new System.EventHandler(this.Page_Load);

}

#endregion

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Re: Load fires twice.

May 16, 2006 08:23 PM|LINK

Check to see if you "AutoEventWireup" set to true. If this is a control, check the parent control/page also. Even if the control itself is set to false, but the parent is set to true, it seems to fire anyway.

We've been changing them from Page_Load to <Control>_Load in our usercontrols just for that reason.

-mkc

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BGriffin_TPA

Member

489 Points

311 Posts

Re: Load fires twice.

Apr 21, 2007 06:32 PM|LINK

ashram99 :

I tried both AutoEventWireup=false (and true) and it made no change.

The page load fires twice on DDL's in an updatepanel. The autopostback=true

because I need to capture the selectedindexchanged event. Even tho in an

updatepanel the DDL causes a postback. if I setautopostback=false the event

is queued and eventually fires when I hit a button which causes a postback, but

that's too late to do what I need to do. Here is the HTML, if it will help.

<%--*** the add new panel/form
--%>    <asp:Panel ID="Panel3" runat="server" BackColor="PaleGoldenrod" Height="265px"
                Style="left: 256px; position: absolute; top: 352px; display:none;"
                EnableTheming="False" Width="270px" >
            <div style="border: 1px outset white; width: 250px; height: 245px; left: 8px; position: absolute; top: 8px;" align="left">
                <asp:Label ID="lblInMarket" runat="server" EnableTheming="False" EnableViewState="False"
                    Font-Bold="True" ForeColor="Black" Height="16px" Style="font-size: 8pt; left: 0.1in;
                    color: black; font-family: Tahoma; position: absolute; top: 0.18in" Text="In Market:"
                    Width="64px"></asp:Label>
                <asp:UpdatePanel ID="UpdatePanel1" ChildrenAsTriggers=true runat="server">
                <ContentTemplate>
                    <asp:Label ID="lblSearchBy" runat="server" Font-Bold="True" ForeColor="Black" Height="16px"
                        Style="font-size: 8pt; left: 0.08in; color: black; font-family: Tahoma;
                        position: absolute; top: 0.47in; text-align: right" Text="Search By:" Width="64px"></asp:Label>
                    <asp:Label ID="lblFor" runat="server" Font-Bold="True" ForeColor="Black" Height="16px"
                        Style="font-size: 8pt; left: 0.41in; color: black; font-family: Tahoma;
                        position: absolute; top: 0.75in; text-align: right" Text="For:" Width="32px"></asp:Label>
                    <asp:Label ID="lblMessage" runat="server" BackColor="White" BorderColor="#00C000" Font-Bold="True" Style="left: 8px; position: absolute;
                        top: 192px; text-align: center;" Text="Signals on new additions to your watch list (when they occur) are available within 24 hours."
                        Width="232px" EnableTheming="False" EnableViewState="False" ForeColor="#C00000"></asp:Label>
                    <asp:DropDownList ID="cmbMarket" runat="server" Style="left: 0.84in;
                        position: absolute; top: 0.13in" TabIndex="1" Width="96px" EnableTheming="False" AutoPostBack="True">
                    </asp:DropDownList>
                    <asp:DropDownList ID="cmbSearchBy" runat="server" Style="left: 0.84in;
                        position: absolute; top: 0.42in" TabIndex="1" Width="96px" EnableTheming="False" AutoPostBack="True">
                    </asp:DropDownList>
                    <asp:TextBox ID="txtSearchFor" runat="server" EnableTheming="False"
                        Height="14px" MaxLength="25" Style="font-size: 13px; left: 0.84in; position: absolute;
                        top: 0.71in" TabIndex="2" Width="144px"></asp:TextBox>
                    <asp:TextBox ID="TxtCoName" runat="server" EnableTheming="False" Height="14px" MaxLength="35"
                        ReadOnly="True" Style="font-size: 12px; left: 0.81in; position: absolute; top: 1.28in"
                        TabIndex="-1" Width="136px" EnableViewState="False"></asp:TextBox>
                    <asp:ImageButton ID="cmdSearch" runat="server" CausesValidation="False" EnableTheming="False"
                        EnableViewState="False" Height="22px" ImageUrl="~/Images/Static/_Find.jpg"
                        onmouseout="MM_swapImgRestore()" onmouseover="MM_swapImage('cmdSearch','','Images/Static/_FindOver.jpg',1)" Style="left: 80px;
                        position: absolute; top: 96px" Width="90px" OnClick="cmdSearch_Click" />
                    <asp:ImageButton ID="cmdAddPanel3" runat="server" CausesValidation="False" EnableTheming="False"
                        EnableViewState="False" Height="22px" ImageUrl="~/Images/Static/_AddNew.jpg"
                        onmouseout="MM_swapImgRestore()" onmouseover="MM_swapImage('cmdAddNew','','Images/Static/_AddNewOver.jpg',1)"
                        Style="left: 40px; position: absolute; top: 160px" Width="90px" OnClick="cmdAddPanel3_Click" />
                </ContentTemplate>
                    <Triggers>
                        <asp:AsyncPostBackTrigger ControlID="cmbMarket" EventName="SelectedIndexChanged" />
                        <asp:AsyncPostBackTrigger ControlID="cmbSearchBy" EventName="SelectedIndexChanged" />
                        <asp:AsyncPostBackTrigger ControlID="cmdSearch" EventName="Click" />
                    </Triggers>
                </asp:UpdatePanel>
                <asp:ImageButton ID="cmdAddCancel" runat="server" EnableTheming="False"
                    EnableViewState="False" Height="22px" ImageUrl="~/Images/Static/_AddNewCancel.jpg"
                    onmouseout="MM_swapImgRestore()" onmouseover="MM_swapImage('cmdCancel','','Images/Static/_AddNewCancelOver.jpg',1)"
                    Style="left: 144px; position: absolute; top: 160px" Width="90px" OnClick="cmdAddCancel_Click" CausesValidation="False" />
            </div>
        </asp:Panel>
        <AjaxControlToolkit:ModalPopupExtender ID="ModalPopupExtender3" runat="server"
            BackgroundCssClass="modalBackground" TargetControlID="cmdAddnew" PopupControlID="Panel3">
        </AjaxControlToolkit:ModalPopupExtender>

Thanks for any help..

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Jason Hill

Contributor

2019 Points

497 Posts

Re: Load fires twice.

Apr 23, 2007 08:42 PM|LINK

Yes, you will need autopostback=true if you want the postback to occur immediately the event occurs in the UI.

If you are using autoeventwireup=true then make sure that you are not manually hooking up the event handlers in the code behind as well, e.g. cmdAddPanel3.Click += new ImageClickEventHandler(cmdAddPanel3_Click);

If you could post the entire web form and code behind file then I could test it out here and see if I get the same problem.

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DrSpeedo

Member

22 Points

15 Posts

Re: Load fires twice.

Apr 27, 2007 03:23 PM|LINK

I'm having the same problem and in Visual Studio 2005 the event handlers in the code behind are hidden or non existant, I can't seem to find it how do I look it up. If how do I get them to show up.

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lordofthexin...

Member

16 Points

24 Posts

Re: Load fires twice.

Oct 29, 2007 09:30 PM|LINK

Somehow my page_load's were changed to below , so that was the issue, took off second loads and now it s good

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load, Me.Load

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lordofthexin...

Member

16 Points

24 Posts

Re: Load fires twice.

Oct 29, 2007 09:48 PM|LINK

Whenever I add a WARP Infragistics control and set the triggercontrolids property it changes the source code, so those infragistics users watch out, when you set that

Reply

Goalie35

Member

196 Points

194 Posts

Re: Load fires twice.

Mar 05, 2009 02:00 AM|LINK

I know this is an older topic but in case anyone encounters the same issue, I just wanted to share the solution to my particular situation for this problem:

I had pasted the following "Initializecomponent" code into my solution as part of some 3rd party code I had copied from the internet.

#region Web Form Designer generated codeoverride protected void OnInit(EventArgs e)

{

//

// CODEGEN: This call is required by the ASP.NET Web Form Designer.

//

InitializeComponent();

base.OnInit(e);

}

/// <summary>

/// Required method for Designer support - do not modify

/// the contents of this method with the code editor.

/// </summary>

private void InitializeComponent()

{

this.Load += new System.EventHandler(this.Page_Load);

}

#endregion

The issue was the line beginning with "this.Load". Once I pulled that code out, everything worked fine.

-Goalie35

Load fires twice. RSS

16 replies

ShimonSim

Load fires twice.

mbund

Re: Load fires twice.

ShimonSim

Re: Load fires twice.

ashram99

Re: Load fires twice.

BGriffin_TPA

Re: Load fires twice.

Jason Hill

Re: Load fires twice.

DrSpeedo

Re: Load fires twice.

lordofthexin...

Re: Load fires twice.

lordofthexin...

Re: Load fires twice.

Goalie35

Re: Load fires twice.

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