How To Make An Attribute On A Custom User / Server Control Be Mandatory

Feb 24, 2011

If certain attributes on built-in ASP.NET controls aren't specified, then an exception will be thrown.

How do I do this on my custom user/server control?

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Custom Server Controls :: Category Attribute Of User Control Property Does Not Work Correctly In Categories Tab

Aug 19, 2010

I have a User Control (ascx) and a property which a want to display in my categories tab in Visual Studio in the category named "Styles".


And here is the problem: Actually I do not need a get, because I only have to set the property (write only property). But when I omit the get, the property is displayed in the "Misc" category in the categories tab in Visual Studio. Only when I code the get as well, then the property is displayed correctly in the "Styles" category in the categories tab in Visual Studio.

Does anybody know why? How can I display the category correctly only with set?

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Forms Data Controls :: Set Attribute In Custom User Control And Keep Getting Zero?

Jul 30, 2010


I am having a problem setting the SystemObjectRecordID attribute of my custom control inside a repeater. Currently, the value winds up as zero in the database. Things I have checked:

1) The datatype of the DB column (bigint) and the datatype of AlertId (long) and the datatype of the getter/setter SystemObjectRecordID variable (long) match.

2) If I set '<%# ((Alert)Container.DataItem).AlertId %>' to the Text attribute of a label I get the expected results. So, it has something to do with my custom control and specifically how data isbound to the SystemObjectRecordID attribute.

Now, going to the server, below is what I have for databinding (The page is Default.aspx.cs and the namespace is Company.ProjectWeb.Profiles):


Currently I am trying to pass the value received from a literal (because I know that the values are received as expected here) to the SystemObjectRecordId object. Still isn't working. I am still getting a value of zero when I set a breakpoint and look at the value of SystemObjectRecordId in the codebehind of my control:


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Web Forms :: Add Custom Server Side Attribute To TextBox Control?

Jan 17, 2011

How do I do something like the following:


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Custom Server Controls :: Custom Control's Constructor / User To Set That variable In The Properties Window After They Drag The Control Onto A Form?

Mar 4, 2010

I have a custom control which inherit from the Table class and in the constructor, it takes a an integer as an argument. There is no empty constructor.

Is there a way for the user to set that variable in the properties window after they drag the control onto a form.

I know some .NET controls, you can set the source for the parameter to different things like another control's property, QueryString using just the properties window.

Right now, I have to create the control dynamically. I read the query string and then created the object.

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Custom Server Controls :: Unable To Convert User Control To Custom Control

Oct 27, 2010

I have created a user control and am ready to convert it into a custom control. I am trying to follow:

[URL] the steps mentioned in the link.

I am not seeing Build / Publish Web Site option.

I am using VS 2008. I only see Publish User Control but it doesn't give all the settings mentioned below. When I do publish user control, it just copies the ascx file to the desired location. how can I convert the user control to custom control.

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Custom Server Controls :: User Template Control Or Custom Server Control?

Jul 22, 2010

I need to develop control (template or user) which must have subtags with some items.

For example :

<SomeControl runat="server" id="scTest">

This control may contain some other web server controls such as GridView.I need explanation of experienced developers, how to do that - take me to the right way

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User/server Control With Custom List Items / Create A Simple Menu User Control

Feb 18, 2011

I'm attempting to create a simple menu user control just as outlined here.

The attached code results in an "Object reference not set to an instance of an object" error, but I can't figure out why.

<%@ Master Language="VB" CodeFile="MySite.master.vb" Inherits="MySite" %>
<%@ Register src="Controls/Menu.ascx" tagname="Menu" tagprefix="my" %>
<html xmlns="">
<head runat="server">......

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Custom Server Controls :: Custom User Control That Fills Itself?

Feb 15, 2010

I'm new to all of this, so go easy on me. This should be an easy one. I have created a custom SmartContentBlock user control for a CMS.The control works, but only if I invoke the Fill() function in the Page_init event in the codebehind of the ASPX page. My goal is to modify the class file so that the Fill() in the codebehind is no longer neccesary. So, for reference, here's the gist of the current situtation.Controls.cs




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Custom Server Controls :: Unable To Use A Web User Control Inside Another Web User Control

Mar 10, 2011

I have a web user control that represents a simple message box. It is used to display simple messages like "Item has been deleted", or "The item was saved successfully".

On the other hand, I have another web user control that represents the item in the form of an editable form (I made this a user control because this is used in two different pages). I want to embed an instance of the message box user control inside the editable form. I am writing this right after the @Control directive:


Instead of using @Register directives, I register the user controls in web.config and so far this has worked just fine.

With the above markup, the project compiles, but whenever I try to navigate to a page that contains this construct, I get an HttpParseException exception. Furthermore, Visual Studio states that the tack w7rc9:MessageBox doesn't represent a known control.

What am I doing wrong?

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Does A Composite Server Control(inc. User Control, Custom Server Control) Normally Encapsulate Css Properties?

Nov 7, 2010

If a composite server control normally encapsulate styling information inside, it is an example of code encapsulation and modularization. However if css properties are included inside the composite control, it is not ideal for code/styling separation and css code re-use principles. Now which consideration should be the main consideration?

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Custom Server Controls :: Use Custom Control/user Control?

Oct 12, 2010

I have 3 pages in each page there is a portion of page where it is common in all these three pages.Thought of making the common stuff as a separate control either User control/Custom control.Any suggestions on which one should i use custom/user control

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Custom Server Controls :: Save User's Input In User Control?

Mar 28, 2011

I have a user control (ascx file) that contains an interface for users to change the data retrieved from the db. So, I am displaying data and most of this data can be edited by the user. When the user enters text into a textbox, and clicks "Save Changes", the value they typed in is lost and not persisted to the database. I realize now this is because the SaveChanges button does a postback, and the user control gets reloaded with its original valuesbefore the code within my SaveChanges button gets executed. I'm not sure if there are properties I need to set to save the input data, or if I need to write my own code to do it. What is the generally accepted method to do this? (Also, all of the controls in the ascx file are wrapped in an Update Panel.)

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Custom Server Controls :: Want To Create User Control

Oct 30, 2010

I want to create user control that can be added on other site.

here is the scenario.In my web site reservations can be done for restaurants. I want to provide user interface for reservation in restaurant owner's web site. When user goes to restauarants site he can reserve the slot through my site.

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Custom Server Controls :: User Control Disappears ?

Dec 23, 2010

m trying to add custom control to my page this code,and it works fine.

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Custom Server Controls :: User Control Page C#?

Mar 25, 2011

i have a user control page and only have , which i have <div> and a gridview inside <div>how can i add a scroll bar in user control page?the code like below in aspx:<@regrister url="user control page" tagname="xx" tagprefix="aa"><div><aa: id="xx"></div> <--to embed user control page.

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Add A Custom / Namespaced XHTML Attribute To A Web Control Declaratively?

Aug 24, 2010

Normally, unknown attributes of a webcontrol are passed through to to the rendered element in the browser. So the following works.

<asp:label runat="server" Text="Label Text" helpId="101" />

However, if you use a namespaced attribute like the following

<asp:label runat="server" Text="Label Text" myNs:helpId="101" /></div>

The attribute is not rendered to the client, even when the custom namespace is declared in the html element like: <html xmlns= [URL] Does anyone know of a way to get this to render to the client, without having to use a custom control. A module or other globally "pluggable" solution would be acceptable.

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Custom Server Controls :: Custom Tag Not Found For Control / Error: Unknown Server Tag 'custom:AjaxValidator'

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:


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Custom Server Controls :: Creating User Control Like Gridview?

Dec 31, 2010

i'm developing a webusercontrol, that has very properties, properties are of custome types (not primitive), so i want user can edit properties in grid property. i want something like gridview here is a portion of my code:



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Custom Server Controls :: Dynamic User Control Rendering - How To Do It

Jun 8, 2010

I am using two user controls in my page. The controls are loaded dynamically one at a time. I'm just referencing the user controls in the page and loading them dynamically using 'LoadControl()'. Everything is working fine till now and the user can switch the controls one another.

Here the issue I found is eventhough the controls are working as expected and the data is visible, the rendered HTML contains only the first loaded user control's markup.

Even if the current control displayed is 'usercontrol2', the source shows 'usercontrol1' markup. How can I force the page to render 'usercontrol2' markup and remove 'usercontrol1' markup while loading'usercontrol2'?

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Custom Server Controls :: User Control Doesn't Databind?

Sep 16, 2010

I reference a user control in my ListView in this manner:


The problem is that the #Bind command doesn't update the database, but it does so when I paste the code directly into the aspx page (in other words, without the user control involved).

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Custom Server Controls :: Creating A User Control From Scratch?

Aug 11, 2010

I want to create a completely new control instead of extending an existing one. I have found a few articles on the net, but it's not exactly what I'm looking for. I've created Custom User controls in Win Forms before and thought it would be somewhat the same in ASP.NET, but it does not seem so. Many articles talk about a Web Control Library template which doesn't seem to be available when creating a New Project, but is available when adding a New item to an existing ASP.NET forms project in VS2008.

I have extended control by using the ASP.NET Server Control template. But all you get with is a .cs file. How do design a brand new control with that?What I want is to create a control from scratch, with postback functionality, and that compiles to a DLL. Am I going about this all wrong? Should I rather be looking at the ASP.NET Server Control Project Template? If so, How do I create a brand new control with the ASP.NET Server Control?I'm working with VS2008 SP1, .net 3.5, and C#.

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Custom Server Controls :: Adding A CssClass Property To Web User Control?

Apr 26, 2010

The built in Asp.Net Controls (label, Textbox, etc.) all have a CssClass property that can be set, what do I need to do to implement that for a Web User Control?

I know how to add a property and pass thru the get & set to the corresponding Asp.Net control (example if I have a label I know how to create a LabelCssClass property that provides a get & set, but the control itself how do I set a CssClass or ClassName property.

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Custom Server Controls :: Accessing User Control Over Multiple Projects?

Dec 10, 2010

I have a piece of code that is just HTML. It was previously created as a user control. Within the application i'm working with there are two seperate websites that are interlinked to make one website. There is a documents section where users do not need to login and a data section where users need to login. The design was implemented long before I was hired. My problem is I want to use the code from the documents website with the data website but I can't seem to register the control. I only one this piece of code in one place so when it is updated it doesn't have to be in multiple places. I tried setting "src=http://website/doc/doc.ascx" but this errors out saying

<%@ Register Src="http://website/doc/doc.ascx" TagName="docs" TagPrefix="temp" %>

Parser Error Message: The file '/documents/http://website/doc/doc.ascx' does not exist.

It adds the directory as part of the src. How can I have it point to this location http://website/doc/doc.ascx ?

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Custom Server Controls :: OnItemCommand Not Firing In Templated User Control?

Aug 11, 2010

I have a templated user control with single instance template attribute. It works great for everything except the following scenario:


The folder selector uses a tree view that allows people to select a folder, its FolderSelected event works perfectly and the file selector updates with the files. The file selector has a repeater that lists the files in the selected directory. It has a linkbutton for each of the files so that the user can select a file. The problem is that the ItemCommand event of the repeater doesn't fire when the file name is clicked on. The page performs the async postback like it should, but in debug, the method to handle the itemcommand event is never hit. On the same user control to select files there is a button that the user can add files to the folder. When it is clicked, the event DOES fire and the file is added and the control refreshes in the update panel, everything perfect. It seems that because the linkbutton is already in a templated control (which is in a user control, in a templated control), the event isn't firing correctly. I am confused as to why this should be a problem, especially since all the other events (even the custom ones) fire as long as they aren't in another templated control. Since the code is complicated, I didn't want to post it all here.

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