how can we add Page's PreInit event programatically in code behind with c# language ? More precisely i would like to say if AutoEventWireup is set to false then how to handle Page's PreInit event ?
View 4 RepliesI have a content page with a grid view control in it. In the page preinit event of this page, i am trying to add a column to the grid view. But the value of the grid view shows up as null. Is there something i am missing or how do we add properties to the grid view in the page pre init of the content page.
View 3 RepliesI have a master page and i am changing the masterpage file property to some other master page dynamically in the page PreInit event and that changing url is taken from a viewstate. but the view state is not getting in the pre init event.
View 2 RepliesHow to get control in ASP.NET PreInit event? Pointers are null and FindControl method returns null.
I am using master and content pages. Markup of the content page looks like this:
<asp:Content ID="Content2" ContentPlaceHolderID="ContentBody" runat="server">
<asp:Table ID="Table1" runat="server" Width="100%">
.....
</asp:Table>
</asp:Content>
And code like this:
private void Page_PreInit(object sender, EventArgs e)
{
Control table = this.FindControl("Table1");
//table is null here
}
So table still is null after this.FindControl("Table1"). NamingContainer of the page is null too. What am I doing wrong?
UPDATE I have to use this event to create controls. As said in the ASP.NET Page Life Cycle Overview this event should be used for dynamic control creation. I need to create a list of links in my table. May be there is another way to do it?
How to get postback data in page preinit stage? Can I do that?
View 2 Repliesi am writing a login page in asp.net c# not using login control.i can create account and log in without problems as a user.the pages that require login has a separate master page.and i want to check if the user is logged in in masterpage page_preinit function but the problem is that child page event functions are called before masterpage's so i could experience a problem like session expire in child page before i get to check it in master page.is there anyway around this?
ok found the event im looking for. second one on the list
http://msdn.microsoft.com/en-us/library/dct97kc3.aspx
In our asp.net web application we load the dropdown list boxes in the page load. We than set the SelectedValue of each dropdown list box to an object from session. We have event handlers for many of the SelectedIndexChanged events of the drop down lists boxes, but these do not get executed when we set the selected value programmatically.
Someone else mentioned this is by design, and only when a user manually changes the drop down list selected index, will the event get raised.
I would think this is a common scenario of wanting the selectedindexchanged event handled when setting the selectedvalue/selectedindex/listitem's selected property, of a DropDownList. What is the suggested way to handle this? Is there a significant drawback of creating a custom control inherited from DropDownList that has the functionality of raising this event when changing the SelectedIndex or SelectedValue?
The LinkButton on click event automatically does what I think is called a postback. What line of code do I need to use to invoke this event?
View 3 RepliesIn a User Control, I need to add a Div to the end of its parent's page. I've done this in a number of ASPX pages, where I put the code to generate the Div and its contents in the page's PreRender event handler, and it works fine. But when I try to do the same thing in the PreRender event handler for the User Control, I get the following error:
The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases.How do I accomplish this in a User Control?
I've been out of the programming since last winter and I'm really rusty.
What I'm trying to do is set a master page programmatically. I goggled it and found this:
Csharp Code:
[code].....
There is a website which shows history of lottery numbers. I want to retrieve numbers from the page, by using C# Windows or Web program(ASP.NET).There is a problem that, after selecting the week which you want numbers for from dropdownlist, page does not post. Numbers are retrieved by Ajax.
How can I get numbers for all of the weeks by program?
I need to add some attributes [URL] to the tag in an ASP.NET Page object. Note: I cannot do this in a declarative manner and have to use the server side object model to do it.
To add some additional information:
I need to do this within the ASP.NET Page rendering life cycle.
I need to add the attribute to the root element in the page.
the exact difference between PreInit and Init in the ASP.NET Page LifeCycle ?
View 10 RepliesI'm creating a page that users can upload a file to the webserver. After upload the page will then have a link to the file that has just been uploaded, along with any other files that have already been uploaded.As I am programatcially creating links to the files which have been uploaded, I have to do this in page_init or else the link button won't fire off it's event when clicked. MY web page does all this - it creates the link buttons and when I click on them, it calls the event method required i.e. a sub to download the file.
OK, the problem I've come accross is: when I click upload (to upload the file) - the page_init sub is called, displaying all the previously uploaded files as link buttons. Then my btnUpload_click sub is called, which uploads my current file. The only prob is the current file hasn't been displayed? I can only display links in the page_init, but because btnUpload is called after the page_init, the current file isn't uploaded until after page_init and therefore not dislayed?
Generally we should have control of our AppPools and be able to force the Managed Pipeline Mode. In my case I don't have control and would like to implement the code behind code a little differently based on the Managed Pipeline Mode (Integrated vs Classic). I just don't know how to detect this. Is there a simple way to do it from within the code behind page?
View 1 RepliesI see from around in the 1.4.4 source that Autofac's ASP.NET integration (via Autofac.Integration.Web) peforms injection of properties on the Page as part of the HttpContext.PreRequestHandlerExecute event handling, but that the page's child controls don't get their properties injected until Page.PreLoad.
What this means, though is that the injected properties of child controls are unavailable for use in the OnInit event handler.
For example, this works fine:
HelloWorld.aspx:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="HelloWorld.aspx.cs" Inherits="HelloWorld" %>
<html>
<body>
<asp:Label runat="server" id="lblMsg" OnInit="HandleInit"/>.........
But changing the HelloWorld Page to a UserControl (.acsx) and putting the UserControl in another page doesn't work because _msgProvider isn't injected early enough.
Is there a way to make Autofac inject properties of child controls earlier?
Basically the scenario is like this, I'm getting an XML from a 3rd party application with available dates for booking, for each day there are types of rooms the person can choose, single, double, etc.
Each hostel will return me an unknown number of room types. But dont get too confused with this. The thing is simple I just need to add an unknown number of dropdownlists (or HTML Select) with the numbers of persons to book for. Now because I don't know how many of those dropdowns I will have I need to add them programatically inside a "for int i=0; i
How can I add an unknownn number of dropdownlists programatically to a page and retrieve the selected values with c# on submit?The last column on the screenshot
http://i.imgur.com/37chw.png
Update:I'm creating the code from the xml results as a string that will print as html code:
XmlDocument xmlDoc2 = new XmlDocument();
xmlDoc.LoadXml(getPrices());
XmlNodeList prices = xmlDoc.GetElementsByTagName("RoomType"); [code]...
I know that doing that and adding the runat=server won't help on my control, there is where my main problem is now, how to add the code on the html to be able to get the dropdownlist selected value later with c#. Can I do that with Request.Form ? was trying but so far I couldnt do it.
I have a masterPage on that i am using AjaxModalPopup for login purpose.My requirement is when i login via Master page then it should show the Logged-in User details on the current Content Page that is using same master page.
Here i am using following code to get it back to the same content page after succesful login but it does not show the user details on the same content page rather when i go to next page then it appears.
if (Session["SignedIn"] == null)
{
ValidateUser();
ModalPopupExtenderMaster1.Hide();
string currentPageUrl = System.IO.Path.GetFileName(Request.Url.AbsolutePath);
Server.Transfer(currentPageUrl);
}
But it does not gives user-details on the same content page.
Using vb.net/asp.net 2005.
I have a page books.aspx that has a control named authors.ascx.
Inside the authors control there is a "select" button I want to add some kind of listener or event handler (not sure of the correct terminology) so on the parent page (books.aspx) I can respond to the "select" button being clicked.
I have to pass the authorID from the user control to the parent page.
In my authors.ascx control I just created this event:
[Code]....
Now I need to write the function for SelectAuthorBtnClick and I think add some kind of listener in the parent page to listen and handle the event.
i have an form with an button and some input controls. some time due to input problem i may get error after that if i refreshed the page then that time the button click event has fired, how to avoid this kind of bad event fire.
View 3 Repliesin my web form i have a department dropdown box, in its selectedIndexChanged event i have to fill the equipment dropdown box and in equiment dropdown selectedIndexChanged i have to fill out the other textboxs.
the depratment dropdown box get its value from sqldatasource.
[code]....
what i want is when i run the page, it shows the very first deparment in the list, and according to that it should pop up the values in the other fields, means it should show the values in the equipment dropdownbox and from that one it should pop up the values in the other textbox.
here is my selected indexchanged event for department dropdownbox
[Code]....
How do I create a new event in a base page class that fires after all derived pages have fired their load events but before any controls fire their load events.
The following code fires the event before the derived page's load event. I want it to fire the event after the derived page's load event but before all control load events:
Base Class:
Public Event FirstLoad(ByVal sender As Object, ByVal e As System.EventArgs)
Private Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
RaiseEvent FirstLoad(sender, e)
End If
End Sub
Derived Class:
Private Sub Page_FirstLoad(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.FirstLoad
'Stuff here happens before controls load but only on first page loads'
End Sub
I have two search options:
1. On Master Page there is a text box and button for search.
2. on content page there is form for with two texboxes and a button for search.
Now whenever i press enter key from keyboard, the masterpage button event is fires.
I mean in every case when I press enter key from keyboard the same event is called.
I want If someone fill the content page search form and press enter key, it fires content page event.I am doing it like this:
[code]....
but not working
Is it possible to change the SessionID Programatically without making the current Session Values to null.
View 3 RepliesI have stored image path in database. While displaying I have to get the image path from database and set it as the ImageUrl of Asp.NET Image control.But it is not displaying the image. below is the code of that.protected void Button1_Click(object sender, EventArgs e)
View 2 Replies