Creating a Templated User Control. This article explains how to create your own repeater, with templates. Introduction. The Modern Web programming technology ASP. NET provides many tools and controls to develop Web applications rapidly. For example, the Repeater control is a really simple and powerful control which renders collection data into a web page within a short time of coding. Imagine you want to do the same in classic ASP or PHP, you may have to write a loop in ASP with combined HTML and server scripts. The first difference between ASP and ASP. NET is separation of HTML and server scripts. Microsoft has provided many controls to play with data, for example: Repeater, Data. Grid. View, Data. List etc. In this article I am going to explain how to create this kind of Templated data control. Selecting a Proper Scenario. Creating a custom control every time is an expense of time.
In addition, it may not be tested properly in all kinds of scenarios. It's always the best approach to select the control like Data. Reader which is provided and tested by Microsoft itself. However, in some scenarios we may need better functionality and customization of the control. In such a kind of scenario, we go for User. Control . In this article, I am going to explain a typical Data. Telerik Multi Column RadComboBox from Code / Inside a Composite Control. 3 thoughts on “ Telerik Multi Column RadComboBox from Code / Inside a Composite Control ”. Repeater development. Even though it's already available in ASP. NET, we are going to create a control like Repeater only (Repeating Repeater), because we are already familiar with Repeater controls functionality and it's templates, so it will be easy to understand. Planning the Control. Since we are going to create a control like Data. Repeater, planning about the control is easy. I am going to change only the name of the control. The name of the control is My. I have a simple composite server control. Imagine a text box, a button followed by a label. When I click the button the contents of the text box are copied into the label like so: This works fine. Provides a sample that demonstrates how to add ActiveX controls to an ATL composite control programmatically in Visual C++. Hi all, I am currently preparing to build a custom databound composite control. Everything seems to work well except that when i drop a text box into the ItemTemplate i do not get the smart tag on. I wrote a composite control that consists of various. Passing Templates in a Composite Control User Name: Remember Me? Repeater, which consists of the following four templates: Header template Footer template Item template Alternate item template As we already know, the Header and Footer should be rendered once, and the count of Item template and Alternate. Item. Template should be equal to the number of items in the Data. Source. Planning the Data. Source. Like Repeater, our control should also support most of the generic types, like the ones given below: Data. Table. Data. View. List. Collection. Array. List. Array. Don't get confused about how to handle all the above data types inside the control. This is really simple. All the above data types internally implement IEnumerable, so if we develop a control for IEnumerable, that will support all the above data sources. Important Data Types. We are going to use the following important data types to develop our own Repeater, please refer to MSDN for a detailed description of the following types: ITemplate. IEnumerable. INaming. Container. IData. Item. Control. Creating the User Control. Create a new user control named My. Repeater. ascx, and refer the same in Default. So default. aspx & My. Repeater. ascx will look like they are shown below: My. Repeater. ascx < %@Control. Language=. Create the following four publicproperties inside the User. Control. My. Repeater. System. using System. Web. using System. Web. UI. using System. Web. UI. Web. Controls. System. Web. UI. Html. Controls. using System. Collections. publicpartialclass My. Repeater : System. Web. UI. User. Control. Template. Container: This attribute is used to provide the type of the template content. For each template, runtime must create a User. Control instance to hold the contents, for instance, if your Data. Source has 1. 00 records, internally 1. We need to create another User. Control to render each template into that. This control is called the template container control. Create the class/control as follows: Simple. Template. Item. cs publicclass Simple. Template. Item . Control, System. Web. UI. INaming. Container, IData. Item. Container. . IData. Item: Properties of IData. Item are used to hold the single item of the Data. Source with respect to the template instance. Adding Code to Render the Templates. As of now, we created a User. Control with four template properties and another User. Control (template container) to render the templates on it. Now we need to add the code logic to render the templates. ITemplate interface internally has a method called Instantiate. In, which is used to render the template content into the desired control. Add the following codes into the databind method of myrepeater class, which will add the templates to the User. Control. My. Repeater. Below is the sample code to test the Repeater. Default. aspx < my. Own: My. Repeater. ID=. Instead of the Simple. Template. Item class, you can also use the existing Repeater. Item class if you do not require any additional features. The control that we created is very lightweight, like a normal Repeater. If you want, you can also add some extra features like paging, sorting, etc. Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.
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December 2016
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