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DataBindingHandlerAttribute Class
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DataBindingHandlerAttribute Class

Specifies a design-time class that performs data binding of controls within a designer. This class cannot be inherited.

System.Object
  System.Attribute
    System.Web.UI.DataBindingHandlerAttribute

Namespace:  System.Web.UI
Assembly:  System.Web (in System.Web.dll)

[AttributeUsageAttribute(AttributeTargets.Class)]
public sealed class DataBindingHandlerAttribute : Attribute

The DataBindingHandlerAttribute type exposes the following members.

  NameDescription
Public methodDataBindingHandlerAttribute()Initializes a new instance of the DataBindingHandlerAttribute class using no parameters. This is the default constructor.
Public methodDataBindingHandlerAttribute(String)Initializes a new instance of the DataBindingHandlerAttribute class with the specified type name.
Public methodDataBindingHandlerAttribute(Type)Initializes a new instance of the DataBindingHandlerAttribute class of the specified Type.
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  NameDescription
Public propertyHandlerTypeNameGets the type name of the data-binding handler.
Public propertyTypeIdWhen implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.)
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  NameDescription
Public methodEqualsInfrastructure. Determines whether two object instances are equal. (Overrides Attribute.Equals(Object).)
Public methodGetHashCodeInfrastructure. Returns the hash code for this instance. (Overrides Attribute.GetHashCode().)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIsDefaultAttributeWhen overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.)
Public methodMatchWhen overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Public fieldStatic memberDefaultDefines the default attribute for the DataBindingHandlerAttribute class.
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  NameDescription
Explicit interface implemetationPrivate method_Attribute.GetIDsOfNamesMaps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoRetrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.GetTypeInfoCountRetrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.)
Explicit interface implemetationPrivate method_Attribute.InvokeProvides access to properties and methods exposed by an object. (Inherited from Attribute.)
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For more information about using attributes, see Extending Metadata Using Attributes.

The following code example defines a data-binding handler, named MyDataBindingHandler, to be used by the designer in editing mode. On exiting the editing mode, the Text property value is displayed.


using System;
using System.Collections;
using System.Web.UI;
using System.Web.UI.Design;
using System.Web.UI.WebControls;
using System.ComponentModel;
using System.ComponentModel.Design;


namespace CustomControls
{
  [
    DataBindingHandler(typeof(MyDataBindingHandler)),
    ToolboxData("<{0}:MyLabel runat=server></{0}:MyLabel>")
  ]
  public class MyLabel : Label 
  {
    public  MyLabel()
    { 
      // Insert your code here.
    } 
  }

  public class MyDataBindingHandler : DataBindingHandler
  {
    public override void DataBindControl(IDesignerHost host, Control control)
    {
      ((Label)control).Text = "Added by data binding handler.";
    }
  }

}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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