Controls Initialized With Their Design Time Values?
Jan 19, 2010
Am I right in assuming that only after controls on Master page are merged into the control tree for the Page, can controls ( both those in Master page and in a content Page ) be initialized with their declarative values ( values set during design time)? b) If my above assumption is correct, then these controls cannot be initialized with their design-time values during Page.PreInit, since during Page.PreInit event stage we're still able to dynamically set a Master page?! So if that is the case, when are controls initialized with their declarative values? During Init event orâ€
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Jan 18, 2010
a) Assuming a page has a master page associated with it, then all controls (those declared in master page and those declared in content page) created during design time are assigned declarative values only during an Init event? I'm assuming this since to my understanding controls need first to be put into the control tree before they can be assigned their declarative values? And when page has a master page associated with it, then aren't page's controls put into the control tree only during the Pre_Init or perhaps even during the Init event? Then if that is the case, then isn't the earliest that these controls can be assigned their declarative values during Init event?
b) Assuming our page is associated with Master page and also uses a theme --> skin files are also applied during an Init event, so I assume that during an Init event Asp.Net first initializes controls to their declarative values and only then applies skin rules to them?
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Feb 27, 2011
I installed Rad Controls. Using that controls, I designed my application pages. At design time, the design is not visible. It shows the following error:
RadTabStrip1Failed to create designer 'Telerik.Web.UI.RadTabStrip, Telerik.Web.UI, Version=2010.1.415.35, Culture=neutral, PublicKeyToken=121fae78165ba3d4'
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Jan 15, 2011
I've just started working on some test asp.net webforms projects and am having a problem with VS2010. It is not displaying any controls at design-time. For every control I'm getting message -
Error Creating Control - xxxxx
Object reference not set to an instance of an object
It is doing it on new web.application and Tailspin Spyworks demo app. If I switch a new web.app from asp.net4 to asp.net3.5, all the controls display properly.
I've tried removing and re-installing VS2010 and had no changes.
It acts like something didn't get installed.
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Jun 23, 2010
I am designing an ASP.NET v3.5 custom control based on CompositeControl.
However, I do NOT want to create my child controls via code, but rather as
embedded HTML tag elements within the CompositeControl in the ASPX page, such as:
[code]....
At run time, MyControl.Controls contains the two labels as expected.
At design time, MyControl.Controls is empty.
I need this information at design time for various reasons.
What am I doing wrong?
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May 7, 2010
I'm developing a custom server control and want it to end with /> rather than with </cc1:CustCtrl>. I've tried changing the ToolboxData but it didn't really do it (I can see it initially appears like that but instantly changes to the standard <cc1:CustCtrl blah blah></cc1:CustCtrl>. When i drag a button from the toolbox to the forms markup it uses the <asp:Button blah blah /> markup, how can I emulate this?
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Jun 21, 2010
None of my user controls display on a web form at design time. At runtime they work fine and at design time to design the user controls themselve is fine.
Is there a setting that is telling the controls not to render at design time?
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Mar 13, 2010
i create a custom control which can hold some templates, such as Header, Body Footer, etc.
[Code]....
i tried to use smarttags to allow the user to edit each of the templates, which worked pretty well. what i could not get working was to add a template if it has not been in the control. eg. add a header-template to the control above. i tried using the RootDesigner.AddControlToDocument() function of my controldesigner. but this function gives me an error, telling me the control i'm going to add the template (i used a new HtmlGenericControl("HeaderTemplate") as new Control) to is not valid. (i can't give the exact error message, cause i use a german version of visual studio 2008) i've been searching the web for nearly half a day now, but i did'nt find a working solution for my problem.
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Jul 31, 2010
I have created an advanced label control using web user control to cater some advanced options needed for my application. The control is working fine but there is one hitch bothering me. In normal label control when we change text or color, we can see effects during design time also but this is not functional with web user control. I mean when i change TEXT property of my label inside user control, the effect is visible on runtime not design time.
Is there any way to see effect of property changes during design time??
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Nov 3, 2010
I have a custom Panel with attribute Designer(typeof(xxxMainPanelEditor), typeof(System.Web.UI.Design.WebControls.PanelContainerDesigner)). The child controls of this custom Panel Control at design time can see all the exposed properties that I want to share from the Parent (no problem here).
However, if I place controls on an UpdatePanel, these child controls cannot see the parent container but instead, it immediately sees the form/page or DesignerHost. The problem is the same even if I put Panel on the UpdatePanel and vise versa.
Is there a way to manage controls inside an update panel? For me, this behavior is like saying that UpdatePanel is not container based during design time?
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Apr 19, 2010
I have use composite custome control its contain button and textbox and gridveiw
but design time gridview is not display .
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May 13, 2010
I was referred here by MSDN forums hope this is the right place - I have a custom control (:WebControl) that renders web.sitemap in a specific way. While it runs error free and produces the expected result, at Design-Time it complains
[Code]....
and have tried the SiteMapDataProvider Tag with and without the SiteMapProvider
attribute.Does anybody have (a) any experience with this, or (b) any suggestions as to how to track down the problem?
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Nov 3, 2010
i need to create div on run time in such a manner as it create table at run time,(table is also in another div) .
all my rows in table like this (for example)
Code:
[code]....
let me tell u one more thing above div is sub div of many other divs .how i will access how to add runtime to design time div?
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Sep 22, 2010
This is my first experience with themes.I've created a skin file for a textbox and the defined theme is only visible at runtime.Is this the way theme works or I am missing something?
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Jul 4, 2010
Im making a small user control, i was wondering if it was possible to make some sort of comment, that is only visible design time. For example i would like to write in the top of my control that it requires a querystring parameter named userid. This way other developers can quickly see the requirements?
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Feb 9, 2010
I'm developing a set of custom controls, one of them are the "parent", any others must be added inside an ITemplate property of this parent. But in the page, at design time, I can see, by intellisense, the other controls at page level, and I can theorically add them everywhere. I want to emulate the behaviour of the asp:Table and the asp:TableRow, you can't directly add an asp.
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May 26, 2010
i am trying to call a SP from SQL Server in asp.net app, but it keep crashing every time it hit
'cmd.Connection.Open();' ,,, it give me this message
"The ConnectionString property has not been initialized "
[Code]....
[Code]....
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Sep 29, 2010
I render some markup dynamically in a Web User Control, can I get that out in design mode, and not only runtime?
public override void RenderControl(HtmlTextWriter writer)
{
if (this.DesignMode)
writer.Write("<p>In design mode</p>");
else
base.RenderControl(writer);
}
... nothing happens when I check the design view of the control. Not if I remove the if (this.DesignMode)-condition either.
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Jul 23, 2010
I'm using VS 2008 with the AjaxControlToolkit and at design time I am dragging some regex validators on the page.
Prior to yesterday, when I did this, the design time control allowed me to click a little arrow in the upper right hand of the control and add an extender.
Well, now that ability to add an extender at design time is gone, and I don't know what happened.
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Dec 23, 2015
I have problem with my web form login
Â
<div>
<h1>Konsole - Login</h1>
UserID : <asp:TextBox ID="tb_uid" runat="server" autoComplete="off"></asp:TextBox>
Password :<asp:TextBox ID="tb_pass" runat="server" autoComplete="off"></asp:TextBox>
<asp:Button ID="btn_submit" runat="server" Text="SignIN" />
<br />
[code]...
design code is above and following error occured "WebForms UnobtrusiveValidationMode requires a ScriptResourceMapping for 'jquery'. Please add a ScriptResourceMapping named jquery(case-sensitive)."
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Aug 31, 2010
I have an ASP.net control that contains a grid (protected member variable). Grid is populated from a function in the control. I have derived a new user control from this control without any control in it. I added additional functionality to populate grid and called base class function to do further operation on the grid. When I run my code, I get the null reference exception on grid object in the base control. I missing something in control inheritance? at what point do inner controls get created?
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Sep 30, 2013
public class DataClass{Â Â Â public DataClass()Â Â Â {Â Â Â }Â Â Â /// <summary>Â Â Â
/// return rows depend on position   /// if you need 10th to 20th you need to pass start=10 and end=20  Â
/// </summary>Â Â Â /// <param name="start">database start position of one row</param>Â Â Â
/// <param name="next">database end position of one row</param>Â Â Â
/// <returns></returns>Â Â Â public string GetAjaxContent(int start, int end)Â Â Â {Â Â Â Â Â Â Â Â Â Â
[code].....
When I'm trying to develop the unlimited scrolling in datalist i have an error like connection string not initialized I checked and rechecked.
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Mar 30, 2010
I have the user control and web page. When I place user control in the web page and in design time, it cannot view and error is "System.Web.UI.UserControl does not have a public property named 'ContentTemplate". It seems not related of error message.
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Feb 5, 2010
In my company we use a control that renders the <link rel="stylesheet"> tags dynamically at runtime (equivalent of scriptmanager who renders <script> tags dynamically). this control is very good, cause it select the appropriate css stylesheets depending on some criterias. The problem is that on design time for Visual Studio there is no designated CSS stylecheet since there is no <link rel="stylesheet"> tags on the page.
If I put <link rel="stylesheet"> tags on the aspx page (to indicate a design time stylesheet) this tag will be rendered to client and it causes conflicts with tags rendered by the control !
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May 28, 2010
I am trying to find the best way to concatenate two strings and set the result to the text property of a label during design time.Here is what is not working:
I have Text="<%$Resources:labels, btnLinkNoText%>" and Text='<%# Bind("ProductID") %>'
I want Text="<%$Resources:labels, btnLinkNoText%>" + Text='<%# Bind("ProductID") %>'
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