TagPrefixInfo Class
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TagPrefixInfo Class

 

Defines a configuration element containing tag-related information.

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

System.Object
  System.Configuration.ConfigurationElement
    System.Web.Configuration.TagPrefixInfo

public sealed class TagPrefixInfo : ConfigurationElement

NameDescription
System_CAPS_pubmethodTagPrefixInfo(String, String, String, String, String)

Initializes a new instance of the TagPrefixInfo class using the passed values.

NameDescription
System_CAPS_pubpropertyAssembly

Gets or sets the name of the assembly containing the control implementation.

System_CAPS_pubpropertyCurrentConfiguration

Gets a reference to the top-level Configuration instance that represents the configuration hierarchy that the current ConfigurationElement instance belongs to.(Inherited from ConfigurationElement.)

System_CAPS_pubpropertyElementInformation

Gets an ElementInformation object that contains the non-customizable information and functionality of the ConfigurationElement object. (Inherited from ConfigurationElement.)

System_CAPS_protpropertyElementProperty

Gets the ConfigurationElementProperty object that represents the ConfigurationElement object itself.(Inherited from ConfigurationElement.)

System_CAPS_protpropertyItem[ConfigurationProperty]

Gets or sets a property or attribute of this configuration element.(Inherited from ConfigurationElement.)

System_CAPS_protpropertyItem[String]

Gets or sets a property, attribute, or child element of this configuration element.(Inherited from ConfigurationElement.)

System_CAPS_pubpropertyLockAllAttributesExcept

Gets the collection of locked attributes.(Inherited from ConfigurationElement.)

System_CAPS_pubpropertyLockAllElementsExcept

Gets the collection of locked elements.(Inherited from ConfigurationElement.)

System_CAPS_pubpropertyLockAttributes

Gets the collection of locked attributes (Inherited from ConfigurationElement.)

System_CAPS_pubpropertyLockElements

Gets the collection of locked elements.(Inherited from ConfigurationElement.)

System_CAPS_pubpropertyLockItem

Gets or sets a value indicating whether the element is locked.(Inherited from ConfigurationElement.)

System_CAPS_pubpropertyNamespace

Gets or sets the namespace in which the control resides.

System_CAPS_protpropertyProperties

Gets the collection of properties.(Inherited from ConfigurationElement.)

System_CAPS_pubpropertySource

Gets or sets the name and path of the file containing the user control.

System_CAPS_pubpropertyTagName

Gets or sets the name of the user control.

System_CAPS_pubpropertyTagPrefix

Gets or sets the tag prefix that is being associated with a source file or namespace and assembly.

NameDescription
System_CAPS_protmethodDeserializeElement(XmlReader, Boolean)

Reads XML from the configuration file.(Inherited from ConfigurationElement.)

System_CAPS_pubmethodEquals(Object)

Compares this instance to another object.(Overrides ConfigurationElement.Equals(Object).)

System_CAPS_pubmethodGetHashCode()

Returns a hash value for the current instance.(Overrides ConfigurationElement.GetHashCode().)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_protmethodInit()

Sets the ConfigurationElement object to its initial state.(Inherited from ConfigurationElement.)

System_CAPS_protmethodInitializeDefault()

Used to initialize a default set of values for the ConfigurationElement object.(Inherited from ConfigurationElement.)

System_CAPS_protmethodIsModified()

Indicates whether this configuration element has been modified since it was last saved or loaded, when implemented in a derived class.(Inherited from ConfigurationElement.)

System_CAPS_pubmethodIsReadOnly()

Gets a value indicating whether the ConfigurationElement object is read-only.(Inherited from ConfigurationElement.)

System_CAPS_protmethodReset(ConfigurationElement)

Resets the internal state of the ConfigurationElement object, including the locks and the properties collections.(Inherited from ConfigurationElement.)

System_CAPS_protmethodResetModified()

Resets the value of the IsModified method to false when implemented in a derived class.(Inherited from ConfigurationElement.)

System_CAPS_protmethodSerializeElement(XmlWriter, Boolean)

Writes the contents of this configuration element to the configuration file when implemented in a derived class.(Inherited from ConfigurationElement.)

System_CAPS_protmethodSerializeToXmlElement(XmlWriter, String)

Writes the outer tags of this configuration element to the configuration file when implemented in a derived class.(Inherited from ConfigurationElement.)

System_CAPS_protmethodSetReadOnly()

Sets the IsReadOnly property for the ConfigurationElement object and all subelements.(Inherited from ConfigurationElement.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

System_CAPS_protmethodUnmerge(ConfigurationElement, ConfigurationElement, ConfigurationSaveMode)

Modifies the ConfigurationElement object to remove all values that should not be saved. (Inherited from ConfigurationElement.)

The TagPrefixInfo class allows you to programmatically access and modify tag-prefix information stored in a configuration file. It provides the same functionality as the ASP.NET @Register directive. Tag prefixes associate a "namespace" in ASP.NET to the assemblies and namespaces that must be included for custom controls and user controls to work properly. TagPrefixInfo objects are stored as members of a TagPrefixCollection object. The TagPrefixCollection class allows you to programmatically access and modify the controls subsection of the pages section of a configuration file.

TagPrefixInfo objects are added to the collection using the add element and specifying a value for the tagPrefix attribute along with values for other relevant attributes. The other required information varies based on the kind of control you will use with the specified tag prefix:

The same tagPrefix value can be used to map to multiple assemblies or namespaces.

System_CAPS_noteNote

When a source is specified, the user control itself must not be in the same directory as the page. If it is, you get a run-time error when you attempt to load the page.

This example demonstrates how to specify values declaratively for several attributes of the controls section, which can also be accessed as members of the TagPrefixInfo class.


<system.web>
  <pages>
    <controls>
      <!—- Searches all linked assemblies for the namespace -->
      <add tagPrefix="MyTags1" namespace=" MyNameSpace "/>
      <!-- Uses a specified assembly -->
      <add tagPrefix="MyTags2" namespace="MyNameSpace" 
        assembly="MyAssembly"/>
      <!-- Uses the specified source for the user control -->
      <add tagprefix="MyTags3" tagname="MyCtrl" src="MyControl.ascx"/>
    </controls>
   </pages>
</system.web>

The following code example shows how to use the TagPrefixInfo class to programmatically modify tag prefix settings. This code example is part of a larger example provided for the PagesSection class.

// Get all current Controls in the collection.
for (int i = 0; i < pagesSection.Controls.Count; i++)
{
  Console.WriteLine("Control {0}:", i);
  Console.WriteLine("  TagPrefix = '{0}' ",
      pagesSection.Controls[i].TagPrefix);
  Console.WriteLine("  TagName = '{0}' ",
      pagesSection.Controls[i].TagName);
  Console.WriteLine("  Source = '{0}' ",
      pagesSection.Controls[i].Source);
  Console.WriteLine("  Namespace = '{0}' ",
      pagesSection.Controls[i].Namespace);
  Console.WriteLine("  Assembly = '{0}' ",
      pagesSection.Controls[i].Assembly);
}

// Create a new TagPrefixInfo object.
System.Web.Configuration.TagPrefixInfo tagPrefixInfo =
    new System.Web.Configuration.TagPrefixInfo("MyCtrl", "MyNameSpace", "MyAssembly", "MyControl", "MyControl.ascx");

// Execute the Add Method.
pagesSection.Controls.Add(tagPrefixInfo);

// Add a TagPrefixInfo object using a constructor.
pagesSection.Controls.Add(
    new System.Web.Configuration.TagPrefixInfo(
    "MyCtrl", "MyNameSpace", "MyAssembly", "MyControl",
    "MyControl.ascx"));

.NET Framework
Available since 2.0

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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