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BoundField.BoundField Constructor

Initializes a new instance of the BoundField class.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)

public BoundField ()
public BoundField ()
public function BoundField ()
Not applicable.

Use this constructor to initialize a new instance of the BoundField class. This constructor is commonly used when adding fields to a dynamically created data-bound control.

To dynamically add a BoundField object to a data-bound control, create a new BoundField object, set its properties, and then add it to the data-bound control's field collection. For example, if you are using the GridView control, add the BoundField object to the Columns collection.

NoteNote:

Although you can dynamically add fields to a data-bound control, it is strongly recommended that fields be statically declared and then shown or hidden, as appropriate. Statically declaring all of your fields reduces the size of the view state for the parent data-bound control.

The following code example demonstrates how to use the constructor to dynamically add a BoundField object to a GridView control.


<%@ Page language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  void Page_Load(Object sender, EventArgs e)
  {

    // Dynamically generated field columns need to be created only 
    // the first time the page is loaded.
    if(!IsPostBack)  
    {
      // Dynamically create field columns to display the desired
      // fields from the data source.
  
      // Create a BoundField object to display a customer's company name.
      BoundField nameBoundField = new BoundField();
      nameBoundField.DataField = "CompanyName";
      nameBoundField.HeaderText = "Company Name";
    
      // Create a BoundField object to display a customer's city.
      BoundField cityBoundField = new BoundField();
      cityBoundField.DataField = "City";
      cityBoundField.HeaderText = "City";
    
      // Add the field columns to the ColumnFields collection of the
      // GridView control.
      CustomersGridView.Columns.Add(nameBoundField);
      CustomersGridView.Columns.Add(cityBoundField);
    }
  
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>BoundField Constructor Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>BoundField Constructor Example</h3>

      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="false"
        runat="server">                
      </asp:gridview>
            
      <!-- This example uses Microsoft SQL Server and connects  -->
      <!-- to the Northwind sample database. Use an ASP.NET     -->
      <!-- expression to retrieve the connection string value   -->
      <!-- from the Web.config file.                            -->
      <asp:sqldatasource id="CustomersSqlDataSource"  
        selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
        runat="server">
      </asp:sqldatasource>
            
    </form>
  </body>
</html>


Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0
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