HttpModuleCollection Class

Reference

Definition

Namespace:: System.Web

Assembly:: System.Web.dll

Important

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Provides a way to index and retrieve a collection of IHttpModule objects.

public ref class HttpModuleCollection sealed : System::Collections::Specialized::NameObjectCollectionBase

public sealed class HttpModuleCollection : System.Collections.Specialized.NameObjectCollectionBase

type HttpModuleCollection = class
    inherit NameObjectCollectionBase

Public NotInheritable Class HttpModuleCollection
Inherits NameObjectCollectionBase

Inheritance: Object

NameObjectCollectionBase
HttpModuleCollection

Examples

The following code example demonstrates the AllKeys property and the GetKey and CopyTo methods of the HttpModuleCollection class. The example gets the application object for the current request from the current HttpContext object. It then extracts the HttpModuleCollection object from the application instance and displays the names of the IHttpModule objects.

<%@ Page language="C#" %>
<%@ Import Namespace = "System.Data"  %>
<script runat="server">
// System.Web.HttpModuleCollection.AllKeys;GetKey;CopyTo

void Page_Load(object sender, System.EventArgs e)
{
    // Get the HttpContext object for the current request.
    HttpContext myHttpContext = HttpContext.Current;
    // Get the application object for the current request.
    HttpApplication myHttpApplication = myHttpContext.ApplicationInstance;
    // Get the collection of all HTTPModule objects for the current application.
    HttpModuleCollection myHttpModuleCollection = myHttpApplication.Modules;

    // Get the name of the HttpModule object at index 1.
    string httpModuleName = myHttpModuleCollection.GetKey(1);
    Response.Write("The name of the HttpModule object at index 1" + " is " +"'"+  httpModuleName+"'." + "<br><br>"); 

    string[] allModules = myHttpModuleCollection.AllKeys;

    // Display the names of all HttpModule objects.
    Response.Write("<b>The HttpModule objects contained in the HttpModuleCollection are:</b><br>");

    for(int i=0; i < allModules.Length; i++)
       Response.Write("Module" + i + "  : " + allModules[i] + "<br>");

    // Copy the HttpModule objects in the collection into an array.
    System.Array httpModuleArray = Array.CreateInstance(typeof(object),myHttpModuleCollection.AllKeys.Length);
    myHttpModuleCollection.CopyTo(httpModuleArray,0);
    Response.Write("<br><br><b>Successfully copied the HttpModule objects in the HttpModuleCollection to an array."+
       "<br>Displaying the HttpModule objects in array:</b><br>");

    for(int i=0; i < httpModuleArray.Length; i++)
       Response.Write("Module" + i + ": " + httpModuleArray.GetValue(i) + "<br>");

}
</script>
<!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 id="Head1" runat="server">
    <title>HttpModuleCollection Example</title>
</head>
<body>
</body>
</html>

<%@ Page language="VB" %>
<%@ Import Namespace = "System.Data"  %>

<script runat="server">
' System.Web.HttpModuleCollection.AllKeys;GetKey;CopyTo
Sub Page_Load(Sender As Object, e As EventArgs )

' Get the HttpContext object for the current request.
Dim i As Integer
Dim myHttpContext As HttpContext  = HttpContext.Current
' Get the application object for the current request.
Dim  myHttpApplication As HttpApplication = myHttpContext.ApplicationInstance
' Get the collection of all HTTPModule objects for the current application.
Dim myHttpModuleCollection As HttpModuleCollection = myHttpApplication.Modules
       
' Get the name of the HttpModule object at index 1.
Dim httpModuleName As string = myHttpModuleCollection.GetKey(1)
Response.Write("The name of the HttpModule object at index 1" + " is " +"'"+  httpModuleName+"'." + "<br><br>")
      
Dim  allModules() As string = myHttpModuleCollection.AllKeys
      
' Display the names of all HttpModule objects.
Response.Write("<b>The HttpModule objects of HttpModuleCollection are:</b><br>")

For i = 0 To allModules.Length -1 
   Response.Write("Module" + i.ToString() + "  : " + allModules(i).ToString() + "<br>")
Next i


' Copy the HttpModule objects in the collection into an array.    
Dim httpModuleArray As System.Array = Array.CreateInstance(GetType(object),myHttpModuleCollection.AllKeys.Length)
myHttpModuleCollection.CopyTo(httpModuleArray,0)
Response.Write("<br><br><b>Successfully copied the HttpModule objects in the HttpModuleCollection to an array."+ "<br>Displaying the HttpModule objects in the array:</b><br>")

For i=0 To httpModuleArray.Length -1
   Response.Write("Module" + i.ToString() + ": " + httpModuleArray.GetValue(i).ToString() + "<br>")
Next i

End Sub
</script>

<!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 id="Head1" runat="server">
    <title>HttpModuleCollection Example</title>
</head>
<body>
</body>
</html>

Properties

AllKeys	Gets a string array containing all the keys (module names) in the HttpModuleCollection.
Count	Gets the number of key/value pairs contained in the NameObjectCollectionBase instance. (Inherited from NameObjectCollectionBase)
IsReadOnly	Gets or sets a value indicating whether the NameObjectCollectionBase instance is read-only. (Inherited from NameObjectCollectionBase)
Item[Int32]	Gets the IHttpModule object with the specified numerical index from the HttpModuleCollection.
Item[String]	Gets the IHttpModule object with the specified name from the HttpModuleCollection.
Keys	Gets a NameObjectCollectionBase.KeysCollection instance that contains all the keys in the NameObjectCollectionBase instance. (Inherited from NameObjectCollectionBase)

Methods

BaseAdd(String, Object)	Adds an entry with the specified key and value into the NameObjectCollectionBase instance. (Inherited from NameObjectCollectionBase)
BaseClear()	Removes all entries from the NameObjectCollectionBase instance. (Inherited from NameObjectCollectionBase)
BaseGet(Int32)	Gets the value of the entry at the specified index of the NameObjectCollectionBase instance. (Inherited from NameObjectCollectionBase)
BaseGet(String)	Gets the value of the first entry with the specified key from the NameObjectCollectionBase instance. (Inherited from NameObjectCollectionBase)
BaseGetAllKeys()	Returns a String array that contains all the keys in the NameObjectCollectionBase instance. (Inherited from NameObjectCollectionBase)
BaseGetAllValues()	Returns an Object array that contains all the values in the NameObjectCollectionBase instance. (Inherited from NameObjectCollectionBase)
BaseGetAllValues(Type)	Returns an array of the specified type that contains all the values in the NameObjectCollectionBase instance. (Inherited from NameObjectCollectionBase)
BaseGetKey(Int32)	Gets the key of the entry at the specified index of the NameObjectCollectionBase instance. (Inherited from NameObjectCollectionBase)
BaseHasKeys()	Gets a value indicating whether the NameObjectCollectionBase instance contains entries whose keys are not `null`. (Inherited from NameObjectCollectionBase)
BaseRemove(String)	Removes the entries with the specified key from the NameObjectCollectionBase instance. (Inherited from NameObjectCollectionBase)
BaseRemoveAt(Int32)	Removes the entry at the specified index of the NameObjectCollectionBase instance. (Inherited from NameObjectCollectionBase)
BaseSet(Int32, Object)	Sets the value of the entry at the specified index of the NameObjectCollectionBase instance. (Inherited from NameObjectCollectionBase)
BaseSet(String, Object)	Sets the value of the first entry with the specified key in the NameObjectCollectionBase instance, if found; otherwise, adds an entry with the specified key and value into the NameObjectCollectionBase instance. (Inherited from NameObjectCollectionBase)
CopyTo(Array, Int32)	Copies members of the module collection to an Array, beginning at the specified index of the array.
Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object)
Get(Int32)	Returns the IHttpModule object with the specified index from the HttpModuleCollection.
Get(String)	Returns the IHttpModule object with the specified name from the HttpModuleCollection.
GetEnumerator()	Returns an enumerator that iterates through the NameObjectCollectionBase. (Inherited from NameObjectCollectionBase)
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetKey(Int32)	Returns the key (name) of the IHttpModule object at the specified numerical index.
GetObjectData(SerializationInfo, StreamingContext)	Obsolete. Implements the ISerializable interface and returns the data needed to serialize the NameObjectCollectionBase instance. (Inherited from NameObjectCollectionBase)
GetType()	Gets the Type of the current instance. (Inherited from Object)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
OnDeserialization(Object)	Implements the ISerializable interface and raises the deserialization event when the deserialization is complete. (Inherited from NameObjectCollectionBase)
ToString()	Returns a string that represents the current object. (Inherited from Object)

Explicit Interface Implementations

ICollection.CopyTo(Array, Int32)	Copies the entire NameObjectCollectionBase to a compatible one-dimensional Array, starting at the specified index of the target array. (Inherited from NameObjectCollectionBase)
ICollection.IsSynchronized	Gets a value indicating whether access to the NameObjectCollectionBase object is synchronized (thread safe). (Inherited from NameObjectCollectionBase)
ICollection.SyncRoot	Gets an object that can be used to synchronize access to the NameObjectCollectionBase object. (Inherited from NameObjectCollectionBase)

Extension Methods

Cast<TResult>(IEnumerable)	Casts the elements of an IEnumerable to the specified type.
OfType<TResult>(IEnumerable)	Filters the elements of an IEnumerable based on a specified type.
AsParallel(IEnumerable)	Enables parallelization of a query.
AsQueryable(IEnumerable)	Converts an IEnumerable to an IQueryable.

Applies to

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