What is a GridView ?
The GridView control is a feature
rich and versatile control used to accept, display, and edit data on a web
page. It is a commonly used control in ASP.Net web applications.
To use a GridView control a DataSource control has to be attached to the GridView control. The property DataSourceID of the GridView control binds the GridView control to the DataSource control and allows paging, sorting and database operations with the DataSource.
There are four popular DataSource controls and SqlDataSource control is one of them. We use SqlDataSource control, to attach the GridView control to the Sql Server Data base.
The SqlDataSource control contains ConnectionString, SelectCommand, UpdateCommand and DeleteCommand properties. The ConnectionString property connects the DataSource (SqlDataSource) control to the database and properties such as SelectCommand, InsertCommand, UpdateCommand, DeleteCommand contains SQL statements that are executed when we display, insert and delete records using the GridView control.
A GridView control and a SqlDataSource control is placed on the web form. The Select, Delete, Insert and Update commands are used to interact with the Sql Server database.
The Figure shown above gives a overview of how the gridView control works in tandem with SqlDataSource control and the Sql server database. The GridView control is placed on the web form and is visible to the user. The SqlDataSource control is placed on the web form and is not visible to the user at runtime.
After the DataSourceID of the GridView control is set, the SqlDataSource control is ready to establish a connection with the Sql Server database, retrieve data from the database table and pass the data to the GridView control.
For inserting records, either the DetailsView or the FormView control is commonly used with the GridView control. However, we can also use GridView control’s FooterTemplate to insert records.
While developing commercial database software such as Accounting or ERP software, we can use GridView control’s FooterTemplate to insert records. We need not use DetailsView control or the FormView control.
GridView control supports programmatic access to the GridView object model and sets properties and handles events dynamically.
The GridView control is the successor to the DataGrid control. The GridView control displays database records in a HTML table with each record in a table row and each field in a column.
To display data in the GridView control from the sql server database, we need to bind the GridView control to the SqlDataSource control either declaratively or programmatically.
By default, the AutoGenerateColumns property is set to ‘true’, which renders each field in the data source as a column in the GridView control.
We can also define seven field types to create columns in the GridView control.
- What is a GridView
- GridView AutoGenerateColumns property
- Bind GridView control with SqlDataSource control
- DataBinding in a GridView control
- Binding a GridView programmatically with dataset
- Binding a GridView programmatically with Generic List Collection
- GridView CommandField example
- Using fields with the GridView control
- Adding Boundfields to a GridView control
- Adding button fields to a GridView control
- Create Templatefields in a GridView control
- Access a value using SelectedIndexChanged() event when a row in a GridView is selected
- How to restrict an item from being selected using GridView SelectedIndexChanging Event
- How to add a new row in the GridView control by using the GridView footer template
- Gridview datakeynames
- How to select a particular row in a GridView control using SelectedDataKey method
What is gridview in aspnet?
Displays the values of a data source
in a table where each column represents a field and each row represents a
record. The GridView control enables you to select, sort, and edit these items.
Assembly: System.Web (in System.Web.dll) Syntax
Visual Basic (Declaration)
Public Class GridView _
Inherits CompositeDataBoundControl _
Implements IPostBackContainer, IPostBackEventHandler, ICallbackContainer, ICallbackEventHandler
Visual Basic (Usage)
Dim instance As GridView
[AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public class GridView : CompositeDataBoundControl, IPostBackContainer,
IPostBackEventHandler, ICallbackContainer, ICallbackEventHandler
[AspNetHostingPermissionAttribute(SecurityAction::LinkDemand, Level = AspNetHostingPermissionLevel::Minimal)]
[AspNetHostingPermissionAttribute(SecurityAction::InheritanceDemand, Level = AspNetHostingPermissionLevel::Minimal)]
public ref class GridView : public CompositeDataBoundControl,
IPostBackContainer, IPostBackEventHandler, ICallbackContainer, ICallbackEventHandler
public class GridView extends CompositeDataBoundControl implements IPostBackContainer, IPostBackEventHandler, ICallbackContainer, ICallbackEventHandler
The GridView control is used to display the values of a data source in a table. Each column represents a field, while each row represents a record. The GridView control supports the following features:
- Binding to data source controls, such as SqlDataSource.
- Built-in sort capabilities.
- Built-in update and delete capabilities.
- Built-in paging capabilities.
- Built-in row selection capabilities.
- Programmatic access to the GridView object model to dynamically set properties, handle events, and so on.
- Multiple key fields.
- Multiple data fields for the hyperlink columns.
- Customizable appearance through themes and styles.