Using CommandField in a GridView control

Using a <CommandField> element, we can display one or more command buttons in a column of the GridView control. When we use the <CommandField> element tag, command buttons are included in each row of a GridView control. As shown in the picture, the <CommandField> column displays Delete, Edit, Update and Cancel buttons.


screenshot of gridview control with use of element tag

Using the below code, the <CommandField> column displays Delete, Edit, Update and Cancel buttons.

Note: Update and Cancel buttons are displayed only when a user clicks on the Edit button to edit a row. Although a single <CommandField> can display more than one button, it is recommended to create separate command fields for Select, Edit and Delete buttons. The ButtonType property specifies the type of button to be displayed in the GridView control. The valid options are Button, Link or Image.

In the code given below, we declare a GridView control and set the AutoGenerateColumns property to 'false' and then add <CommandField> element within the <Columns> element.

<asp:CommandField> element to display buttons in each row of the GridView control. Observe that the ButtonType property of CommandField is set as a hyperlink.

<asp:GridView ID="GridView1" DataSourceId="MyDataSource"   DataKeyNames="Code"
AutoGenerateColumns="false"   runat="server">
<Columns>
	<asp:CommandField ButtonType="Link" ShowEditButton="true" 
    ShowDeleteButton="true"  ShowCancelButton="true" />
	<asp:BoundField  DataField="Code" HeaderText="Code" />
	<asp:BoundField  DataField="Name" HeaderText="Name" />
	<asp:BoundField  DataField="Description" HeaderText="Description" />
</Columns>
</asp:GridView> 
            
<asp:SqlDataSource ID="MyDataSource"  
ConnectionString="<%$Connectionstrings:ERPConnectionString%>"
SelectCommand="SELECT * FROM Sample" 
UpdateCommand="Update SAMPLE SET Name=@Name,Description=@Description Where Code=@Code"
DeleteCommand="Delete SAMPLE Where Code=@Code" runat="server"/>




cover image of azure cloud book

Develop Azure Applications

Azure Cloud is gaining popularity and is competing with Amazon Elastic Cloud and Google Cloud for a spot in the billion dollar Cloud computing space.

With this book learn how to use - Table (an Azure Table is different from a SQL Server Table), Queue, Blob storage services, use your local machine to create an Application and a Service, how Azure splits a Table to achieve Load Balancing, Scalability based on the Partition Key, AppFabric Service Bus, Access Control Service, role of Fabric Controller, features of Azure SQL Database and Content Delivery Network.

Many have mastered Cloud Programming and are enjoying the benefits. Why not you?

View Highlights » View Contents »
cover image of foundation database programming book

Create your Own Accounting Software

A foundation book to Master Accounting Software Development, VB.Net, C# and OOPs programming. Detailed explanation of the Accounting domain for programmers is included. SQL and ADO.Net is also covered in detail.

This book gives you a strong foundation in Application Development.

A thorough understanding of the contents will enable you to grasp the topics covered in the accompanying books quite easily. This is because, the accounting domain is dealt with great detail in this book.

The ideal book to get started with application development in the .Net world.

View Highlights » View Contents »

cover image of asp.net book

Create your Own WEB ERP Software using ASP.Net

This book opens you to the Web. Using ASP.Net, C# and SQL Server as the tools, you will learn to build a Multi Tier Web Application as recommended by Microsoft. You will learn implementing inline GridView control, Transaction Management for a layered Web Application, build Data Access component and a Business Layer component.

Opens you to a world of opportunities. You will be able to develop a Web ERP application including all the five modules and learn how to use the TreeView control and GridView control to implement transactions such as Purchase Invoice, Sales Order and Sales Invoice.

View Highlights »
cover image of entity framework book

ASP.Net MVC 5 Application Development Using Entity Framework 6 and VS 2015

Entity frameworks is the latest buzz in .Net programming and is the data access technology for Microsoft OS based hand held devices and web applications. Learn to integrate EF into an ASP.Net Application and MVC application. Create, explore and query the Entity Data Model. Learn how to use ObjectDataSource control and GridView control in an ASP.Net Application.

Also, learn to build Three-Tier ASP.Net application, create a business-class, implement methods in the class to perform CRUD operations and bind a GridView to the ObjectDataSource control. Learn how to handle concurrency and managing Transactions.

View Contents »