Custom Server Controls :: Skinning With Call To CreateChildControls / New Buttons Are Not Created
Mar 24, 2010
I'm making a custom modal popup using a bunch divs where the programmer can set how many buttons thay want to apprear on said popup programatically using a function. It works. The only problem is that when the programmer specifies the number of buttons he/she wants it wipes out the skin information for the whole control. If I comment out the call to CreateChildControls the skin works fine, but the new buttons are not created.
In my CreateChildControls function the first thing it does is call Controls.Clear(). I assume this is what's wiping out the skin information, but it's kind of necessary to prevent controls with duplicate IDs.
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Similar Messages:
Dec 22, 2010
Let me explain, describing the scenario:In a custom server control (in my case, derived from CompositeControl), in the overidden CreateChildControls method I create a complex tree of subcontrols, using information from a db.The db provides both information on which controls I need to create (the user interface's structure) and the data used to fill these controls.Than the user can interact with the control and change the data (that becomes different to what stored on db).
My custom control lives in the same page where there are other controls, obviously.And these controls can cause a postback at any time.What I need is that my custom control keeps the data entered by the user across these postback, without reverting to the original data and loose the user data entry.
Here is the first doubt:
1)I create the subcontrols dinamically in the CreateChildControls at any page refresh (both on first call than on postback).I know that the framework solves the reference between the posted data and the controls I create in the CreateChildControls in order to set properties and raise control events, but can you tell me when and how it actually does this? In which phase of page life cycle? What happens after the CreateChildControls?
A second doubt:2)If the user interface structure must change as a consequence of the data entered, I had to execute CreateChildControls twice (the first time to recreate the original interface to get the events and the second time to create the new interface)
In which phase of page/control lifecycle do I have to make the second call to CreateChildControls? I do it on Prerender now, but is it right or wrong, and why?
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Oct 12, 2010
I create a webcontrol (DefectsList as a gridview) with an icon that call an httphandler to open an other webcontrol (DefectEditor as an editor) but the CreateChildControls of the editor is not called!!
see the details below of DefectsList:
[Code]....
and the javascript:
[Code]....
see the details below of DefectEditor:
[Code]....
Why the CreateChildControls is not called, I think is due to the HttpHandler? so how to do?
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Oct 1, 2010
i have develop a custom control as shown below
[Code]....
[Code]....
Now in page load event i am trying to a access textbox (txtData) of my custome control as shown below
[Code]....
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Jan 25, 2010
I have some CSS that uses lists to create 3D buttons styles similar to the link below:
http://articles.techrepublic.com.com/5100-10878_11-5323375.html
My problem is I have buttons which are server controls and thus render html buttons.
The question is how would I rewrite my button code to use lists and hyperlinks so I can apply the CSS which has been already written?
All I am doing in my button code is within the onclick event setting a string value and calling a method by passing it that string value.
I'm after is some onclick event equivalent i can hook my code into for hyperlink controls.
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Feb 10, 2010
I want to unit test my rendering engine for an ASP.NET app. I have some custom controls created in that app. Most of those control rely on having CreateChildControls() method called by the ASP.Net engine wheather during initial call or a postback.When running a test CreateChildControls() does not get called and the control is in an "invalid" state.
As a workaround to get the tests going I explicitly call some other public method that calls EnsureChildControls() in it. This in effect causes CreateChildControls() to be executed and the control being initialized properly (just as it would normally when hosted on web server). I would like to get rid of that extra method call and the control to still be in a proper state for testing.
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Mar 17, 2010
I have a control that displays a list of comments. The comments are created in a loop. The problem is that I want to put a LinkButton at the end of each comment and change the CommanArgument of each button to the ID of the current comment.
When I put the Linkbutton in the CreateChildControls method and then add the CommandArgument in the Render loop, the button works, but the argument is blank. When I put the code that's in the CreateChildControls method inside of the loop, I don't get an error, but nothing happens when the button is clicked.
Below is the relevent code ...
[Code]....
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Jan 18, 2010
I'm having the same issue as posted here:
http://forums.asp.net/p/1157529/1904541.aspx#1904541
I have a web user control that implements iWebEditable, and a custom editor part the implements EditorPart. In my custom editor part class, i define a text box, create the textbox in createchildcontrols() then render the textbox in RenderContents() using the following line:
_txtTitle.RenderControl(writer);
As soon as I add the line above (which displays the text box in the editor part) the functions createchildcontrols and applychanges are called in the wrong order. i click save button in the editor part to save changes to textbox, createchildcontrols() is called first, then applychanges() is called after the editorpart and the webpart (custom control) are rendered requiring me to refresh the page (which is not the desired functionality ;-] ). As soon as I comment out the line above in RenderContents() the functions are called in the correct order: appychanges() first, then createchildcontrols().
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Apr 6, 2010
For test purposes I have created a simple button control that extends CompositeControl. I am able to place it on the page with a <asp:Content... and the Click event Bubbles without problem from the Control.
Now, here is the problem I am facing Due to design requirement I need to read the assembly and the classname from a table and dynamically create the control and add it to the <asp:Content. And when I do that the click event will not fire! Where am I going wrong.
Here is the code in the ButtonControl.cs
namespace Reports.Web.ServerControls {
[DefaultProperty("Text")]
[ToolboxData("<{0}:ButtonControl runat=server></{0}:ButtonControl>")]
public class ButtonControl : CompositeControl {
protected override void CreateChildControls() {
Button btn = new Button();
[Code]....
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Apr 11, 2010
I created and populated a database inside Visual Studio 2008 instead of using Management Studio.I need to run the script to create the schema for users and roles.The database does not show up in ASP.NET SQL Server Setup Wizard or in Management StudioThe only databases that do show up are master, model, msdb, and tempdb
Is there anything I can do to fix this or would it be easier for me to just create a new database starting in Management Studio and then connect to it from within Visual Studio?
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Jan 3, 2011
Hope this is the correct forum for this question. I am using VWD 2010 an have a web project and get the following error upon execution:
Parser Error Message: Unknown server tag 'custom:AjaxValidator'.
My code is as follows in the .cs file:
[Code]....
[Code]....
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Jun 9, 2012
i use these code to paging my grid view
[URL]......
here pagination is like this
First 1,2,3,4,5,6,7,8,9,10 Last
I want my pagination be like this Previouse 1,2,3,..
Next, I mean if i have more than 3 page it shows like above and when i click on next it show like this
Previouse 4,5,6,.. Next
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Jun 16, 2010
On my server side code I create a list of radio buttons with a loop:
[Code]....
The buttons are set to auto post back.On page_load I can get the ID of the radio button that was clicked with:
[Code]....
Now I would like to reference which list item was selected?
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Mar 18, 2011
I have a modalPopupExtender in my aspx web page pointing to a Panel and in Code-Behind I create buttons which I want them to show the modalPopup, so I have:
buttonX.OnClientClick = "javascript:$get(" + modalPopup.ClientID + ").show();";
but instead it just does a PostBack, even if I put "return false;" at the end of the past code.
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Dec 10, 2010
I made a web form in asp.net and I am using loop to add button on the page. But problem is this, I'm not able to handle event of it.
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Jan 25, 2011
m new to .NET. I'm trying to create a button dynamically with event by original button. The original button's click event response creates a button. The new button has a click event attached with a test message.What I have to do is onclick change background color of dynamically created button and grab id value to delete when button delete is clicked. Unfortunately, when I click the dynamically attached button,
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
[code]...
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Feb 17, 2010
I've created an array of buttons like static Button[] myButtons = new Button[3];
and then creating and adding buttons to my panel like myButtons[i] = new Button();
myPanel.Controls.Add(myButtons[i]);
in my code behind.
How can I handle the events that occurs when a user clicks these buttons, like using OnClick="myMethod" with regular buttons?
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Apr 16, 2013
I created a web site with admin control with C# ASP.Net. Admin can create a new button1 with button2.I did this. but when admin login again the created button is not seen.I guess I should save this created button at SQL Server but how should I do.
My code which create dinamically button is here:
Button btn2 = new Button(); btn2.ID = "btnEdit"; btn2.Text = txtKategoriEkle.Text; btn2.Attributes.Add("OnClick", "btnEdit_Click"); btn2.Attributes.Add("onclick", "my_javascript_function"); form1.Controls.Add(btn2);
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Apr 4, 2010
I have a custom server control inheriting from CompositeControl. It consists of two RadioButtonlist controls that are rendered side by side in an html table. The number of ListItems in each RadioButtonList is not known until runtime. Depending on how many items each list contains, the RepeatColumns property of each list is set differently. To do this in the handler for the ItemDataBound event I need to get the count of ListItems in each RadioButtonList. How do I expose the Items.Count property of each internal RadioButtonList as a top-level property? I tried using a getter to return the count but this generates a compile-time error to the effect that the count cannot be assigned to--even though I have not created a setter.
Similarly, in the handler for the Submit event, I need to get the ClientID of each internal RadioButtonList to pass to a method that checks for data changes. How do I expose the ClientID of each component RadioButtonList as a top-level property?
I can of course index the Controls collection of the composite control to access the child control and read its properties--but that defeats the whole point of making a complex, independent custom server control.
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Jan 26, 2011
I'm trying to create a button dynamically with event by original button. The original button's click event response creates a button. The new button has a click event attached with a test message.What I have to do is onclick change background color of dynamically created button and grab id value to delete when button delete is clicked. Unfortunately, when I click the dynamically attached button, nothing happens.
[URL]
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Mar 22, 2011
I am trying to build a custom composite control, which allows me to add custom content to each child control. It's a similar concept to what you have with a GridView and TemplateColumn. The markup used to place the control on the page would end up being something like this:
[Code]....
I have the code below, which allows me to put that markup on the page without throwing any errors, and it renders all the correct HTML, except it doesn't render the contents of the ColumnTemplate. I have replaced the Render() code with a comment because it's quite long winded and doesn't add anything important here:
[Code]....
I have tried to follow examples on MSDN and other forums but I can't make this work. I think I'm missing the code to render the contents of the template, but I don't know how to hook that up.
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Aug 20, 2010
i am new to technology so go easy on this post according to what i read from web there are 3 type of custom server controls 1 superclass2 composite 3 renderedi found video tutorial for superclass custom server control but couldnt find video tutials for other 2.lease forward me link for composite and rendered custom server controls video tutorial
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May 17, 2010
I am creating custom server control. I have two classes in project. One is main class that render control and another will be used to render content based on condition.I just want to know how to render content from other classes in main class.For example. This isjust an example.My main class code
[Code]....
My TopLeftPane class
[Code]....
My page code on page load event
[Code]....
When I run the page, Header title always getting null. This is a just sample code. I will have more than 20 classes so I dont want to write a code in main class to render whole control.I hope all of you understand my problem.
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Jul 28, 2010
Case : a templatefield Text Box created by class TemplateHandler and added to the composite
control Grid .how to bind it to the DataSource Object of the Grid Class ?
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Oct 22, 2010
I have to use inline code for an aspx page and I need to use a custom server control that is defined in the same aspx page but the control does not get processed as a server control. it gets returned as is as static html tag.
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