Web Forms :: Dynamically Creating Instance Of Ascx - Controls Not Being Initialized?
Jul 29, 2010
apologies beforehand for what can possibly be a daft conceptual question. I have an ascx control that has a bunch of ASP labels and buttons in the ascx page and some other public methods and properties in the code behind. When I drop this ascx control in a page it all works fine. I now have a page with a placeholder and I am trying to dynamically create an instance of my ascx control and put it there. I then reference this control in code and while all public methods and properties are available (ie MyControl.TitleString = "Hello";MyControl.DoSomething();) none of the ASP controls are. Rather, they are all null. So MyControl.buttonSave is null, MyControl.LabelTitle is null, etc. Is this by design? Am I missing something? If not, what's the point of being able to create dynamically do this?
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Aug 5, 2010
I have a dropdown list on my homepage which users select a category. After selecting the category, user will fill a form which has related controls to that category in it.
As I have many categories, I just want to have single ascx page and adding controls to it dynamically according to the user choice.
For example: One chose Telephone category, he will face a form having drop down lists asking, what brand? what color? And one chose, book category, he will face drop down lists asking which type? howmany pages?
So 1 ascx must do my work at runtime done as I have alot of categories.
I am going to take these criterias from a database table which has CategoryID and Criteria colomns.
And if I can do that, will it be possible to add field validators to these dynamically created controls.
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May 5, 2010
I am building a .net page and need to display some data residing in a database. Some of it's working, some not. I would like to use a table to display the data with the format below..
Table
row - question data
row - answer (count)
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row - next question data
row - answer (count)
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Jan 27, 2011
I am trying to get VS 2008 SP1 to precompile a development site using the Web Deployment Project method. I've done this previously with a different site containing ASPX pages, with success. However, this is a third party example web application containing a set of ASCX controls. The idea is that I want to create a precompiled DLL containing the controls, that can then be distributed as a library DLL. I thought the the use of WDP should allow the compiler to compile all the ASCX controls, and then optionally merge them all into a single DLL.
The problem is, the WDP build reports that it succeeds, but the only file generated is the precompiledapp.config file. On closer inspection of the reporting, it seems that the only error reported is:
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Mar 18, 2011
I have an issue with gridview and ascx's inside. Into the item template I'm dynamically loading ascx files depending on the row hiddenfield value. Ascx control is then "opened" in panel with modalpopup extender. The issue is ascx control with ceratin programming logic behind does not postback in this scenario.
Is there any workaround here?
Here's html snippet
[Code]....
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Feb 7, 2010
I'm developing an ASP.NET application with C# and Ajax.I have a page that holds user controls loaded dynamically. I need to pass some data (integer values and some strings) to the user control that has been loaded dynamically.Now I use Session to pass these values, but I think I can use another way; something like VIEWSTATE or hidden input.What do you recommend me?The fact that I load the controls dynamically is important because controls are loaded on every postback, and I can't store any value on controls.
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May 19, 2010
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Jan 12, 2010
I'm developing an ASP.NET application and I'm trying to do the following:
I'm going to have only one ASPX page splitted into two columns. On the left column is going to be a TreeView, and on the right column is going to be something to edit treeview's nodes.
When the user can select a treeview's node to edit on the right column. Depending on the node's depth fields on right column will vary.
I wondering to use ASCX controls and load on right column dinamically using AJAX, for example. Is there a better choice? Can I do that?
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Apr 27, 2010
is anybody interesting in share and join to develop callback web controls. My purposes is lower unsynchronized page development cost. I have developed a base class and a set of common controls. Currently, they allowed to be loaded dynamically in a control or ASCX via callback event using sample server side code. Control library code will automatically register javascript and render it on client browser. These controls worked fine in both callback and postback. To load dynamically from an ASCX file.
'ascx1.ascx contain some callback-able controls
Private Function LoadAscx_DuringCallback(Optional ByVal RenderMe As Boolean = False) As String
Dim rt As String = ""
div1.Controls.Clear()
Dim c As Control = LoadControl("~/Test2/ASCX/ascx1.ascx")
c.ID = "ascx1"
div1.Controls.Add(c)
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Return rt
End Function
Or to load dynamically as a control
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Private Function LoadControl_DuringCallback(Optional ByVal RenderMe As Boolean = False) As String
Dim rt As String = ""
div1.Controls.Clear()
Dim c As New ACT360_CallbackControls.ZYH.TextBox
AddHandler c.KeyUp, AddressOf TextBox_KeyUp
AddHandler c.GetFocus, AddressOf TextBox_GetGocus
div1.Controls.Add(c)
If RenderMe Then rt = CallbackManager1.RenderControlHelper(c)
Return rt
End Function
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Jul 8, 2010
i've got a project requirement in which a webpage developed in asp.net+C# - (used for information gathering from the end user) can be changed to a report view of the same page (after submitting) with dynamic html formatting without affecting the original page can it be done by creating an object of that webpage and modifying its properties or creating an instance of the page or something like that.
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Jan 24, 2010
Ive got some custom code that im using to load user controls dynamically depending on the option a user selects from a menu control on the page.
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My codes below, can someone take a look and see if they can see whats wrong.
[Code]....
End Class
[Code]....
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Jul 21, 2010
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Jan 8, 2010
In the master page code behind I added
public ContentPlaceHolder BodyPlaceHolder
{
get { return ContentPlaceHolder1; }
}
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protected void Page_Load(object sender, EventArgs e)
{
if (!User.Identity.IsAuthenticated)
{
LoginRegisterControl lrControl = new LoginRegisterControl();
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}
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}
}
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[Code]....
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Nov 1, 2010
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Here's the class where I'm creating them.
[Code]....
Am I able to successfully refer to a panel on the page that I'm calling this routine from simply by ByVal ... As Panel, or should I use HttpContext?
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This is the basic piece of code I have currently and I am stuck -
[Code]....
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Nov 23, 2010
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OdbcCommand sqlcommand6 = new OdbcCommand("select vehicle_cat_desc from vehicle_cat where vehicle_cat_desc=" + "'" + manufacturer.Text + "'", dbConnection);
OdbcDataReader cats = sqlcommand6.ExecuteReader();[code]....
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Jul 28, 2010
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<div id="mydiv" runat="server">
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</div>
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Peter
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Aug 2, 2010
i wanna creating a gallery in my website by using datalist,
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I am stuck in chart controls...Here is my prob... There is a ListBox containing some items...when user selects multiple items from the list box I want to generate a dynamic table with the number of columns same as that of the number items selected in the listbox. And for each selected item I want to show a seperate chart in the columns...Currently I want the same chart control for every selected item (i.e. a static hard coded chart that i will replace later by dynamic values)....I am using a method that draws a chart control using a sample dataset... I am calling it each time when a new column is created..Also the DrawChart method executes for the first column only and throws an index out of range exception! after the first execution...my code is not working...here
my code...
[Code]....
[Code]....
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