Build a Nested Grid. View Control with ASP. NETThe biggest oversight in ASP. NET is the lack of an easy way to create fully functional nested grid and user control views (nested means one or more controls exist in one or more Grid. View cells; these controls may be grids or user control grids nested n- levels deep.) Propagating data downstream, permitting full editing functionality, and event handling are still very labor intensive. This is a glaring deficiency in the way you can develop Web applications with ASP. NET. Suppose you want to show customers, orders, order details, and maybe product information from a Northwind database in a related way. This article describes workarounds to solve the problem of multiple postbacks when using a command button of type image in an ASP.NET GridView (Internet Explorer).; Author: Urs Enzler; Updated:; Section: ASP.NET. The HTML Markup consists of an ASP.Net GridView and a Button. For the GridView I have enabled paging using the AllowPaging property and I have also specified on the OnPageIndexChanging event. In the GridView I have made use of. Hello frdz, I m working in asp.net with C# 2005. I have created the stored procedure of the database tables. I have an expense field in the database of sqlserver 2005.In expense field. I don't care for the built-in Paging technique for GridView, and neither do many other developers who don't want to recreate the GridView Control or buy a third party control for the same. This idea is taken from. The mechanically easy way to derive such a presentation is to establish links between pages and have each subsequent page zoom in to a related downstream piece of information. To put it mildly, this type of implementation results in a tedious series of clicking, posting, and page navigation. You will see how to create complex views easily. They easily could use the implementation style in this article to take the tedium out of building complex GUIs in ASP. NET.)The objective is simple: Show all of the orders for each customer in a single page (see Figure 1). However, by the time you are done, you will see that this approach works for n levels of nesting. The only caution is that with very complex presentation styles bandwidth can become an issue.
Tip: If you want a nicely color- coordinated Web application, try Behr's Smart Color tool. It will help you pick a perfectly coordinated, tri- chromatic color palette. Tell them I sent you. Reviewing the Constituent Parts of the Page. Each level of nesting is composed of three basic parts: A page or user control, which basically are the same thing for this demo's purposes. A Grid. View (or some other similar type control)A User. Control, which will be used to contain the nested elements. The nested controls to implement the User. Control (these can be individual controls or another Grid. View)At the highest level of the nested view is an ASP. NET Web Page. The page is important not only because it will be the root of the presentation layer, but it also is where user data will be stored in session and where changes will be persisted. The page- level Grid. View simply repeats and displays the data at the highest level of the relationship. The User. Control essentially provides a blank canvas that you can use to design a sub- view and implement the code- behind for that sub- view. Finally, any child controls you'd like to nest are painted on the User. Controls. For now, ignore the mechanics (that is, the code- behind) and focus on building the view. Assembling the Pieces of the View. The best way to walk through the presentation is to list each step with a brief explanation. Even if you are unfamiliar with Grid. View, smart tags, or User. Controls, the detailed steps should walk you through the process: Create a new Web page (or use an existing one in your project). Add a Grid. View to that page. If the Grid. View is part of a whole page, explore Master pages as a way to get consistent looking pages. Use a Template Column <asp:GridView ID='GridView1' runat='server' DataKeyNames='id' DataSourceID='SqlDataSource1' OnRowCommand='GridView1 Introduction: I decided to write this article because this has been asked so many times before at the forums (http:// Basically, this example shows on how to generate a Row in GridView with TextBoxes when.Data. List and Repeater controls work here too. Define bound columns for every element of data in your master object. I get more e- mail about nested views (and keyboard hooks) than any other topic. This article showed how to create a basic nested presentation. The key is to use template columns for any fields that will contain nested controls and User. Controls. Those User. Controls will be critical in managing the code- behind for each sub- view. About the Author. Paul Kimmel is the VB Today columnist for www. NET. Check out his new book, UML De. Mystified, from Mc. Graw- Hill/Osborne. Paul is an architect for Tri- State Hospital Supply Corporation. You may contact him for technology questions at pkimmel@softconcepts. If you are interested in joining or sponsoring a . NET Users Group, check out www.
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