I understand the order the events occur with page life cycle but it is not helping with my situation. I have a checkboxlist that is populated by a directory filled with forms. When I check a box next to the name of the form I would like it to dynamically create a wizard step and insert the form.
Order of events:
OnInit:
GatherForms() - Checks directory and loads all form names into checkbox
LoadForms() - Checks "Selected" Session and loads forms that were collected
CheckBoxList:SelectedIndexChanged #AutoPost = true#
PopulateForms() - Loops through the checkboxs and adds them to session state
When the user clicks the checkbox it does a postback and hits the OnInit which pulls from the session. The problem is that PopulateForms() was not ran yet so it populated nothing even though it is checked. If I click another item it will postback and appear. I cannot seem to be able to pull any kind of useful information from the checkbox before the refresh which means I cannot see the forms appear immediately. I have also tried looping the checkbox but unfortunately viewstate hasnt posted yet. sigh.
P.S: I cannot use Request.Form[] because I have to get all the selected items out of the checkbox. maybe i can but i cannot find a way :/
Found this question on an interview siteGiven the following methods of the ASP .Net Page class, in which of them would you attach an event handler to an event published by a control on the web page?
I'm calculating the screen size of the browser and storing it in a hidden field and i'm dynamically creating controls on the page OnInit() based on the sizes. But OnInit() is getting fired before javascript function fires to calculate the screen size.
I want to add more controls to page based on some specific conditions. Those controls don't need any ViewState or binding data, it is as simple as a static link. I wonder where I could write the code: inside OnLoad or OnInit method? and why? If I place it inside OnLoad, should I add following line: if (IsPostBack) return; before any initialization code?
My original understanding was that the asp.net page lifecycle is run once for all pages and controls under normal circumstances. When I attached a control during a container's OnPreRender, I encountered a situation where the control's OnInit was not called. OK, I considered that a bug in my code and fixed as such, by attaching the control earlier.
But just today, I encountered a situation where OnInit for a control seems to be called after the normal OnInit has been done for everyone else. See stack below. It seems that during the page's PreRender, the control's OnInit is called as it is being dynamically added.
So I just want to confirm exactly what ASP.NET's behavior is? Does it actually keep track of the stage of each control's lifecycle, and upon adding a new control, it will run from the very beginning?
[HttpException (0x80004005): The control collection cannot be modified during DataBind, Init, Load, PreRender or Unload phases.] System.Web.UI.ControlCollection.Add(Control child) +8678663 MyCompany.Web.Controls.SetStartPageWrapper.Initialize() MyCompany.Web.Controls.SetStartPageWrapper.OnInit(EventArgs e) System.Web.UI.Control.InitRecursive(Control namingContainer) +333 System.Web.UI.Control.InitRecursive(Control namingContainer) +210 System.Web.UI.Control.AddedControl(Control control, Int32 index) +198 System.Web.UI.ControlCollection.Add(Control child) +80 MyCompany.Web.Controls.PageHeader.OnPreRender(EventArgs e) in System.Web.UI.Control.PreRenderRecursiveInternal() +80 System.Web.UI.Control.PreRenderRecursiveInternal() +171 System.Web.UI.Control.PreRenderRecursiveInternal() +171 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +842
I have created an Asp.Net Ajax Server Control that will be dropped on several aspx pages. I have created an HTMLGenericControl within the OnInit method of the control. This control is a div. Within the code I also need to add an onclick event to a button so that this div is shown.
However, when I call divName.ClientID within the control to pass it to the javascript it doesn't include the part of the ID before the "divName" section of the rendered control id - ct01_ct01_divName.Here is part of the OnInit() method within the ASP.Net Ajax Server Control.[Code]....
A client of mine developed a base page for their site from System.Web.UI.Page. Unfotunately in the OnInit override they forgot to call base.OnInit().Every page in the web site inherits from this base page class. So this requires them to test their complete site again to release the fix. This is a time consuming process to do a full regression test. Looking for insight into how urgent they should be to release this obvious fix. My opinion is this is a serious issue.Web search didn't really lead me to actually what goes wrong in the base Page class when this is done. I realize default event delegate won't get initialized.I know it is bad, but how bad?Looking into insight of what issues it can cause? How will this cause havoc with the ASP.NET web controls?Will controls down rev to emitting HTML and/or javascript for older browsers by default?
In above code I am having a Session["panelOpen"] variable which is created from another user control and once my page is trying to render, I am storing Session["panelOpen"] in my hidden lblPanelOpen.Text on page OnInit() method, however when page is loaded completely then I am trying to remove the session variable.
I was having a discussion with a co worker about some controls I implemented. He objected to my use of dynamicly instantiating controls in the code behind, because it will be slower than specifying the control in the markup. I thought he was talking about output cacheing which to my understanding only caches the rendered output of a page not the instantiated Page object. He said no its a different type of caching. Unfortunately he was unable to give me any documentation to backup the claim so I am wondering if anyone here has ever hear of any such type of caching, and if so is there any documentation on it that I can refer to.
AjaxControlToolkit.ToolKitScriptManager.OnInit() throws thread abort exception for every aspx page. I have an asp.net 2.0 Ajax application, where I have set the following properties of ToolScriptManager on my pages.
I have this configuration on all the aspx pages in my application. When I checked the .NET CLR exception Performance counter I figured out a large number of exceptions, mainly one exception per page load is occuring. On running windbg I was noticed that
AjaxControlToolkit.ToolKitScriptManager.OnInit() has the following code block which is getting executed. The OutputCombinedScriptFile() returns true. But since I am setting my controls on DesignTime still designmode is set to false for toolkitscriptmanager.
if (!DesignMode && (null != Context) && OutputCombinedScriptFile(Context)) { // This was a combined script request that was satisfied; end all processing now Page.Response.End(); }
I am not sure if this is a reported bug or even a bug with ajax, but this is causing havoc in my load test results as I have around 3 hundred thousand HTTP requests to be handled per day out of which 80% are aspx page requests resulting in a large number of threadafbortexceptions, thus affecting the performance.
I have noticed one think. Let me introduce this on simple example.
[Code]....
And *.cs file looks [Code]....
When I run wepage and I type in these textboxes some letters, then I press button, then text in textbox1 is "Text" and text in textbox2 remains the same.
How do I get the old values in a gridview row in the row_updating event? I'm using a sqldatasource control to populate the grid and want to write the update code in the RowUpdating event. There are 10 fields displayed in the grid. I can get the value of the first field using string old_Category = e.OldValues[0].ToString();.
But it doesn't work for index items greater than 0. This doesn't work string old_Category = e.OldValues[1].ToString(); it returns an error message Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index. even though there are 10 columns in the grid.
I having a problem with select values in DropDownList in button event, basically I have a Client form, one button will check of the Login user, case have the registry in data base it's go to load all client informations in the form, in this form I have one DropDownList which contain one coletion of brazilian states, in the event button it's go to stay selected in the correct field, how to select one field in button event onclick or load page event?
I am new in asp .net.I am not able to undestand why we call base class method when we override methods/events.Like automatically visual studio will put base.OnInit() if you are overriding OnInit.
Given the following InsertItemTemplate (simplified) I'm not getting anything back in the event object's Values collection.
[code]....
I'm binding the listview to a collection attached to my nHibernate model object (SearchObject.SearchItems). This collection doesn't have insert or update handling like an object datasource would, so I want to handle the insert/update events manually. Is there a way to get these values to come through automatically, or do I have to manually grab each value from its control when I handle this event?
i have a repeater control and on ItemDataBound event i want fetch values in the repeater control and redirect to another page by passing those values as parameter. i have written the following code
i'm jquery ajax for cascading dropdown operations is works well.but my problem is whenever the button the clicked the second dropdown values is lost .......
note : i have placed two dropdownlist one for binding the class bind from server side code and second dropdown is for binding the division from client side using jquery ajax...
I have a checkboxlist (cblTeamMates) with a sqldatasource (sqlTeamMates) that has 3 columns (ID, FullName and Status ). The datavaluefield and datatextfield for cblTeamMates is "FullName" and the 2 status values possible are "Available" and "Absent". How do I go about, in the page load event, checking all the names (FullName) whose Status is "Available"?
i am using a grid view . i have added a linkbutton in cell[0]. when clicking on this butoon the below event is working.. actually i tried to get the cell[1].text... but not getting any cell values except cell[0].text... get the cell[1].text value.
I have a ListView control that makes use of a DataPager. In each row of the ListView there is a text box where the user will enter some notes relevant to that particular record. Then they use the DataPager to navigate to the second page of records. If they then return back to the first page in the ListView the text they entered is gone.
Question: Is there a way (through use of a paging event or databound event maybe?) to retain the textbox values between paging events ?
I would like the user to be able navigate backward or forward and still see the text heshe has entered.