Editar

Compartir a través de

GridView.UseAccessibleHeader Property

  • Reference

Definition

Namespace:
System.Web.UI.WebControls
Assembly:
System.Web.dll

Gets or sets a value indicating whether a GridView control renders its header in an accessible format. This property is provided to make the control more accessible to users of assistive technology devices.

public:
 virtual property bool UseAccessibleHeader { bool get(); void set(bool value); };
public virtual bool UseAccessibleHeader { get; set; }
member this.UseAccessibleHeader : bool with get, set
Public Overridable Property UseAccessibleHeader As Boolean

Property Value

Boolean

true if the GridView control renders its header in an accessible format; otherwise, false. The default is true.

Examples

The following example demonstrates how to use the UseAccessibleHeader property to disable the accessible header.


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

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView UseAccessibleHeader Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView UseAccessibleHeader Example</h3>

      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSource" 
        autogeneratecolumns="true"
        emptydatatext="No data available." 
        allowpaging="true"
        useaccessibleheader="false" 
        runat="server">
        
        <headerstyle backcolor="LightSteelBlue"
          font-names="Verdana"
          font-italic="true"
          font-size="12" 
          forecolor="Blue"/>
                        
      </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="CustomersSource"
        selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>" 
        runat="server"/>
        
    </form>
  </body>
</html>


<%@ Page language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView UseAccessibleHeader Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView UseAccessibleHeader Example</h3>

      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSource" 
        autogeneratecolumns="true"
        emptydatatext="No data available." 
        allowpaging="true"
        useaccessibleheader="false" 
        runat="server">
        
        <headerstyle backcolor="LightSteelBlue"
          font-names="Verdana"
          font-italic="true"
          font-size="12" 
          forecolor="Blue"/>
                        
      </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="CustomersSource"
        selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>" 
        runat="server"/>
        
    </form>
  </body>
</html>

Remarks

Use the UseAccessibleHeader property to specify whether the GridView control renders its header row in an accessible format. This property is provided to make the control more accessible to users of assistive technology devices. By default, the value of this property is true and the header for the control is rendered using <th> table header cell tags. In addition, a scope="col" attribute is added to the table header to specify that the header applies to all the cells in the column. The default rendering of the <th> element is preserved, rendering text as bold and centered horizontally. Developers can override the style of the <th> element using a cascading style sheet.

If the value of this property is false, the header for the control is rendered using <td> table cell tags.

Applies to

See also