Web Forms :: Page_load Of Webusercontrol Called Twice?
May 5, 2010
I have a page, which load a tab with usercontrol this usercontrol inturn loads an another usercontrol that has treeview. Issue: On (!Postback) of treeview control page_load, this load is gettting called twice. it is not callign the page_load of page but just the control page_load twice.
Tried: changed autoevenwireup from false to true, true to false (no change) Add/Remove of EnableViewState="true" ViewStateMode="Inherit" doesn't make any difference.
but if i add another usercontrolB and load that instead of this controlA, the ControlA still gets called on page_load once and ControlB also once.
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Similar Messages:
Jan 19, 2011
Please have a look at my VB/ASP code and tell me if you can see what's wrong (I have bolded the important segments):
[code]...
Basically, I'm trying to get the Page_Load subroutine to execute on the page load, but it doesn't seem to be called. I'm assuming that because I set my feedback label to "feedback" in the Page_Load subroutine, I should see it displayed on the page saying"feedback" on first loading the page and every time I refresh. But this doesn't happen. I'm lead to conclude that the Page_Load subroutine is not being called on the page load.
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Mar 29, 2010
Initially in my website page_load for the landing page say test.aspx was called twice everytime when it was getting loaded. Since my application is an upgraded one (from VS 2003 to VS 2005/2008), I commented the "this.load" event in InitializeComponent and it is working fine, when user first logs in, into my web application. But then, whenever user navigates to this page from any other page in my application, page_load gets called twice.
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May 20, 2010
I have a TreeView on a page which I will populate the nodes on demand and a checkbox, and they are in the same updatepanel. I can dynamically add new nodes to this treeview. But when I click the checkbox which will cause a postback, the TreeNodePopulate is called before the Page_load and it will regenerate the nodes that was added before. I was very confused how could this be happened. Is this related with PopulateOnDemand and Expanded priorities?
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Feb 2, 2010
I've got a page Default.aspx, it was inherited from class MyBasePage
like this
public partial class _Default : MyBasePage, ICallbackEventHandler
{
}
also it has a master page
<%@ Page Language="C#" AutoEventWireup="true" EnableEventValidation="false" MasterPageFile="~/Master/MyMaster.master" CodeFile="Default.aspx.cs" Inherits="_Default" %>
this master page also has a master
<%@ Master Language="C#" MasterPageFile="~/Master/Base.master" AutoEventWireup="true" CodeFile="MyMaster.cs" Inherits="MyMaster" %>
All works ok, but then i discovered that
Page_Load in Default.aspx is called two times, and both from method OnLoad in MyBasePage
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
}
base.OnLoad(e) calls Page_Load.
I've got a site with such a structure of master pages and basepage, but it works ok, method page_load is called only once.
So why would in the second site PAge_Load be called twice?
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Sep 25, 2010
i have one webusercontrol in this i have 6-textboxes i want to write jscript validation for this.... how can i achive it.
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Jul 23, 2010
Can anyone tell me how we can insert webusercontrol in Table?
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Feb 11, 2010
I have parent page which loads child control which in turn contains DataGrid with template field and button has associated Click() event with it. Problem is that Click() event is not actually called at all. Sample code is below.
UserControl [Code]....
Parent Page
[Code]....
I put debugger into LinkButton1_Click event of user control but it never goes there.
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Feb 18, 2011
I have a webusercontrol with a asp.net flash player. I need to be able to find the control and assign the movieurl from codebehind in the new registered page. How can I find the control that is inside a webusercontrol and is registered in new form and assign the value?
for example: I have webusercontrol called "PopVideo.ascx" registered in the page "Page1.aspx" how can I find the control of the webusercontrol from codebehind under "Page1.aspx"
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Feb 18, 2011
I have a webusercontrol with a flash control. I want to assign the movieurl from codebehind when the webusercontrol is registered in a new page.
<uc1:PopVideo
ID="PopVideo1"
runat="server"
/>
inside this webusercontrol I have a flash movie player that I can assign the movieurl in codebehind on the webusercontrol. The problem is that I need to assign the value from the new page the control is registered under. How can I access the flash control from the new page and assign the value?
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Jan 8, 2010
I am creating a WebUserControl in ASP.Net 2.0 C#. I want to add a DataSource property that will have that useful DropDownList of data sources when I add the control at design time. Here's a fragment of the property in the WebUsercontrol:
[Code]....
Is there an attribute for that?
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Jan 24, 2011
i am create GridView in WebUserControl and and set the AllowPaging="True"din my page is running but the number of page GridView when chose nuber page 1 or 2 or 3the link java
javascript:__doPostBack('ctl00$MainContent$view2$GridView1','Page$5')
why 'ctl00$MainContent$
I
think
the correct sentences
javascript:__doPostBack('GridView1','Page$5')
Server Error in '/' Application.
The GridView 'GridView1' fired event PageIndexChanging which wasn't handled.Description:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.Exception Details:System.Web.HttpException: The GridView 'GridView1' fired event PageIndexChanging which wasn't handled.Source Error:
[Code]....
Stack Trace:
[Code]....
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Feb 12, 2010
Could someone give me a small example how i can make reusable WebUserControl (.ascx) file.Basically i need to make a employee lookup utility where users enters employee id to get Emplyee information.Once the Emplyee information is available, it is used in various data entry tasks by the page that includes the control.
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Feb 9, 2011
In the project I have some custom WebUserControls for form elements (they encapsulate some standard validators and other system specific functions). My user controls are "DropDownListField" and "TextBoxField". In the code behind of a page I have this code:
string parameterValue = null;
foreach (object control in myMultiView.Views[myMultiView.ActiveViewIndex].Controls)
{
if (control.GetType() == typeof(DropDownListField))
parameterValue = ((DropDownListField)control).Value;
if (control.GetType() == typeof(TextBoxField))
parameterValue = ((TextBoxField)control).Value;
}
For some reason the "if" statements always return false even when I step through the code and see that "control" is getting assigned my web user control. This code is in another place in the project exactly the same except in the other location the standard .net controls "TextBox" and "DropDownList" are used and in the other location the code works. why this wouldn't work with web user controls?
UPDATE: Hmm so in debugging I found this:
?control.GetType();
BaseType: {Name = "DropDownListField" FullName = "WebUI.UserControls.Fields.DropDownListField"}
?typeof(DropDownListField);
BaseType: {Name = "UserControl" FullName = "System.Web.UI.UserControl"}
So typeof is just recognizing they are user controls not the full type it seems. how I would check for a specific user control type?
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Nov 4, 2010
I want to add a webusercontol which contains a textbox and a label to the gridview control. I am binding a gridview with a datatable dynamically.
Here is my code:
@ Register Src="CompareBox.ascx" TagName="CompareBox" TagPrefix="objCompareBox" %><br>
<asp:GridView ID="grdfoneBoxContainer" runat="server">
<Columns><br>
<asp:TemplateField HeaderText="User control"> <br>
<ItemTemplate><br>
<objCompareBox:CompareBox ID="CompareBoxCol1" runat="server"/><br>.......
txt & lbl are two properties that are declared in WebUserControl but it's giving object reference error .
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Feb 9, 2010
I had this problem: I created a WebUserControl that used som Ajax stuff - hence it needed a ScriptManager.
The problem was that I couldn't add it to the WebUserControls html code (the .ascx file) since the WebUserControl sometimes was placed into a parent page that already had a ScriptManager, and I couldn't add a ScriptManagerProxy since the parent page sometimes didn't had a ScriptManager.
Alot of people just use a ScriptManager on the MasterPage, but this fails if: one doesn't use a MasterPage or one uses iFrames etc. that uses stand alone aspx pages, like Thickbox might do...
Here's the solution:
in the WebUserControls code behind (.cs file), put this:
protected override void OnInit(EventArgs e)
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May 25, 2010
i was made 'webusercontrol'
and i use this:
event 'msgok' :when btnOk clicked
event ''msgcancel' : when btnCnl clicked
sub 'show' : show this dailog
problem : when i add my 'webusercontrol' to a page,
i can add events(msgok,msgcancel) to page codebehind,
but i cant add this to updatepanel tiggers.
make update panel able to add my 'webusercontrol' events ??
webusercontrol code:
[Code]....
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Feb 1, 2011
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<%@ Reference Control = "CHEADER.ascx" Page="~/Default.aspx" %>
<%@ Reference Control = "CLEFT_NAVIGATION.ascx" %>
<%@ Reference Control = "CCOPYRIGHT.ascx" %>
<%@ Reference Control = "CBOTTOM_NAVIGATION.ascx" %>
<%@ Reference Control = "CPAGE0001.ascx" %>
<%@ Reference Control = "CPAGE0002.ascx" %>
<%@ Reference Control = "CPAGE0003.ascx" %>
[code]...
none of the usercontrols appear thats is if i replace "WebUserControl1" by name CHEADER it says CHEADER? what is that!!asp.net c# vsts2008
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Apr 15, 2010
I am trying to create a chat application like Facebook
My chat windows are in the footer control of the website, and C# code also in footer's CS file, i need to call C# function from footer CS file into javascript included in my footer.aspx file,
i have tried it by ICallbackEventHandler, but WebForm_DoCallback(this,arg,RecieveMessage,"",null,false); simply postback my current page, but i need to postback footer.aspx only and call "public void RaiseCallbackEvent(String eventArgument)".
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Mar 3, 2010
I am creating a WebUserControl in ASP.net and want to be able to access elements of that control later. When I access them though I am trying to access them together. For example, adding a CheckBox and a table to a control and then finding the CheckBox, checking whether it has been ticked and if it has been ticked, get the values from the TextBoxes.
I currently have everything loading on the page from the custom controls, but when iterating through the controls on the page, there doesn't appear to be a control of my WebUserControl type. All of the controls are there on the page, but they exist as seperate ASP.net controls.
Am I thinking about this wrong? Is there a better way to do this?
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Mar 29, 2010
I have a textbox on a webusercontrol thats on a webusercontrol thats on a webusercontrol thats on a page.
I tried using the javascript below but it cant find the control.
<asp:Content ID="Content1" ContentPlaceHolderID="CustomerContentPlaceHolder" Runat="Server">
<SCRIPT language=javascript>
var control =
alert(control)
if( control != null ){control.focus();}
</SCRIPT>
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Aug 27, 2010
I'm having a problem with a Webusercontrol that has an asyncfileupload control. My websusercontrol is being loaded in a placeholder control that's wrapped by an updatepanel.Due to asyncpostback, I have to load and clear the placeholder's controls.
The webusercontrol works flawlessly, except the asyncfileupload, which doesn't want to upload at all. I can assure that the code is without error, because I used to have the webusercontrol running as an *.aspx site. control has to be cleared and reloaded with every asyncpostback ?
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Dec 9, 2010
i have a WebUserControl that have a lable for show message how can i send a value to the lable from Page to my WebUserControl at runtime.
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Jan 5, 2010
I seem to be having a problem with my visual studio 2005/2008 installation or something because it isn't providing any IntelliSense whatsoever for controls registered on web.config files in folders different from the root, but it isn't showing any errors neither. Is this behavior normal?
I have access only to the folder of my sub-app, so I can't modify the root's web.config file. Well I COULD, but I'm NOT allowed to.
What I'm trying is to register some WebUserControl's on the web.config file for sub-app folder, so all the pages in my sub-app can use the WebUserControl's without having to register them on every page, but I'm not getting IntelliSense for those controls registered on the web.config file on my sub-app folder, but I do get IntelliSense if I register them on the root's web.config file. IntelliSense for everything else appears to be working fine.
In the web.config file on my sub-app folder I have something like the following:
[code]....
am I doing something wrong?
Update Now I have upgraded to VS2008 SP1 and the issue persist
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Apr 20, 2010
I need to make a dropdownlist webusercontrol that shows a list of years. The control needs to be flexible enough so that I can tell it show X number of years before and after this year. So if I said show 2 years before after this year the dropdownlist would show 2008, 2009, 2010, 2011 & 2012. In the past I've stored the "X years" for later use by exposing a property and then storing the value in a hidden field. EG:
[Code]....
I want to store the "X years" values that I send to the control the first time - so not a value that I send in a postback. Is there a better way than using a hidden field?
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