Custom Server Controls :: Extend Existing Asp.net Button?
Mar 19, 2010
I want to know if it is possible to extend the properties of a button and possibly override the render() method?I know how to create a custom server control and that is not what I want to do.I have a lot of web application that need to inject some java script on the button render event based on a new properties value.So what I want to do is extend the properties and hook into the Render method of the button control that ships with .net, I want to do it this way then I can still use the default button control but am able to effect all of the buttons in all of the web applications by simply re-publishing them.Inheriting from the System.Web.UI.WebControls.Button class enables me to add the property but then I have to register the "new" control and I have to go and change all of the buttons in all of the web applications.
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Jan 19, 2011
How do I extend a web control's methods?
For example, I want to do this:
[Code]....
I know how to create the loop that checks for the value, I just don't know I to create an method extension to a control.
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Dec 28, 2010
all i want to extend FormView with DeleteItemTemplate
<asp:FormView id="sth" runat="server"....>
<DeleteItemTemplate>
<%-- here goes my custom template %-->
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Mar 6, 2010
I want to extend a datagrid control and use it in my program.
public class MyDataGrid : DataGrid
{}
Now i want to make use this new control in my web page. so i need to register this user control in page.
<%@
Register
TagPrefix
="sam"
Namespace="WebApplication1"
%>
<form><sam:MyDataGrid id="test" runat="server" /> </form>
When I build it is fine. When i run the application it throws the error.
MyDataGrid is a unknown element.This error occurs due to compilation error or web.config does not exists. But there was no scenario like this.
Unknown server tag 'sam:MyDataGrid.Error occured due to parsing.
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Mar 29, 2011
how we can extend a TreeView control and change its appearance to look like a hierarchical tree structure (or binary tree)? so that it can be used for generating a MLM tree from the database with clickable nodes.
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Apr 2, 2010
I'm creating a custom wizard which has a small tip area. So i wanted to extend all controls inside the wizard view to have the property "tip".
To better demonstrate what i want to accomplish:
<trokas:Wizard ID="wizard" Text="Adicionar jogo" runat="server">
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Nov 15, 2010
I have some (probably very basic) questions about developing custom controls. I am wanting to derive a set of button controls, and the first one I have started on is a "DeleteButton", that has a additional property (DeleteConfirmationText) that is built into the OnClientClick attribute. To get that added, I overrode the Render method as follows:
[Code]....
This all works well. Now, I will add some logic to make sure that there is some text in the DeleteConfirmationText property, but that isn't the intent of my question.
What I am also wanting to do is to override some of the default property values, so I added that to the default constructor:
[Code]....
Now, in the designer in VS2008, and I look at the properties for the control, there isn't a default value shown in the "Properties" section, and the Causesvalidation still shows the underlying classes default value of "True". As well, in design mode, where the GridView control that containse my DeleteButton control would be displayed, there is an error box "There was an error rendering the control. 'Are you certain you want to delete this attorney?' cound not be set on property 'DeleteConfirmationText'. Here's the markup where I am defining the deletebutton control:
[Code]....
What am I doing wrong?
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Nov 5, 2010
Is it possible to add a property to the existing asp:BoundField control without creating a brand new instance to which I'd have to declare <tst:BoundField></tst:BoundField>? If so, can someone provide an example?
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Mar 24, 2010
I have a custom radiobutton and it renders fine but loses state after postback.
How can it be modified?
[Code]....
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Nov 16, 2010
I built a webcontrol showing a complex user interface with a lot of javascript. Basically my webcontrol is similar to : [URL]
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Aug 18, 2010
i've created a webform with one gridview having connected with the database using datasource. i.e password database with three colomn .
now want to insert the custom dropdown button using server control for each column.
when i select the dropdown list the list should display the value as required.
e.g if i click the uname dropdownlist then it should show the list of names.
if i click on pwd dropdownlist then it should show the list of numbers.
if i select any one of the value in the dropdown list then it should insert into the
database.
can i get code on this type of question...?
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Oct 20, 2010
i can add buttons in my custom server control but i can't handle button click event. how can i do this
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Jan 25, 2011
I'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, nothing happens.
[Code].....
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Feb 24, 2010
I am obviously missing something here and it is driving me batty. I am trying to implement a custom role provider so that I can add some of my own custom code to it. I have created my CustomRoleProvider class, I have inherited the RoleProvider base class and implemented its members. I have made the required changes to my web.config so that my CustomRoleProvider is used. This is all working great.
All of this is wrapped up in a wrapper class as provided by the MVC Membership Starter Kit that I am using and wish to extend.
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When I add a function to my CustomRoleProvider I cannot see it or access it.
How do I add functionality to my CustomRoleProvider so that I can use it?
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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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Apr 23, 2010
I am trying to use a second (custom) table to extend my users profile info. This table is in the same database as the 'aspnet_Users' table but has a different name. I create a FK relationship between the 'aspnet_Users' table and my custom table. Here is my web.config code:
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<providers>
<clear />
<add name="AspNetSqlMembershipProvider"
type="System.Web.Profile.SqlProfileProvider"
connectionStringName="ConString_SQLConnectionString"
applicationName="/" />
<add name="MyCustomProfile"
type="System.Web.Profile.SqlProfileProvider"
connectionStringName="ConString_SQLConnectionString"
applicationName="/"
table="MyProfileTable_Employees" />
</providers>
<properties>
<group name ="MyProfileInfo">
<add name="FirstName" type="string" defaultValue="[null]" customProviderData="FirstName;nvarchar" provider="MyCustomProfile" />
<add name="LastName" type="string" defaultValue="[null]" customProviderData="LastName;nvarchar" provider="MyCustomProfile" />
<add name="EmployeeNumber" type="int" defaultValue="[null]" customProviderData="EmployeeNumber;int" provider="MyCustomProfile" />
</group>
</properties>
</profile>
I have the table "MyProfileTable_Employees" poplulated with data the 'userid' matches to the aspnet_Users table. In my web application (vb), when I type in Profile.MyProfileInfo, there are no custom fields. Actually, when I type profile., there are no profile related entries. What am I missing here? Am I miss-interpting what a custom profile provider is?
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Jul 7, 2010
I am creating new custom command button control derived from asp.net command button. In my custom control I want to set two images (i.e. one from left and one from right). In center command text will come. I tried background image property using css. But I won't work out for me. The image is coming left but the actual command button style is lost and the second problem is I could not able to set image on right side.
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Feb 28, 2011
I'm trying to create a few custom web controls wrapping some existing controls. One of them, for instance, is a wrap for a textbox (because I need additional behaviors such as corresponding validators). The problem is, I'm not sure how to get the data of that control to be sent in the postback.
A very simplified example:
[code]...
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Oct 20, 2010
Iam developing a custom server control of radiobuttton. it is working fine with the all the properties i wrapped except the grouping . somehow the grouping is not working .
[Code]....
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Mar 25, 2010
how we can access the Remove button event of the Collection Editor dialogue box?
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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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Dec 8, 2010
I have modal popup extender with two buttons called continue and cancel within it.I get this popup warning when session is going to expire.When I click cancel button it should logout me and when I click continue button it should extend my session for next 20 minutes. Both button gets trigered when I click them.Problem is that when I click continue button it should extend session for another 20 minutes and alert should disapper.That doesn't work.
[Code]....
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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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