WebHeaderCollection Class
Contains protocol headers associated with a request or response.
Assembly: System (in System.dll)
System.Collections.Specialized.NameObjectCollectionBase
System.Collections.Specialized.NameValueCollection
System.Net.WebHeaderCollection
| Name | Description | |
|---|---|---|
![]() | WebHeaderCollection() | Initializes a new instance of the WebHeaderCollection class. |
![]() | WebHeaderCollection(SerializationInfo, StreamingContext) | Initializes a new instance of the WebHeaderCollection class from the specified instances of the SerializationInfo and StreamingContext classes. |
| Name | Description | |
|---|---|---|
![]() | AllKeys | Gets all header names (keys) in the collection.(Overrides NameValueCollection.AllKeys.) |
![]() | Count | Gets the number of headers in the collection.(Overrides NameObjectCollectionBase.Count.) |
![]() | IsReadOnly | Gets or sets a value indicating whether the NameObjectCollectionBase instance is read-only.(Inherited from NameObjectCollectionBase.) |
![]() | Item(HttpRequestHeader) | Gets or sets the specified request header. |
![]() | Item(HttpResponseHeader) | Gets or sets the specified response header. |
![]() | Item(Int32) | Gets the entry at the specified index of the NameValueCollection.(Inherited from NameValueCollection.) |
![]() | Item(String) | Gets or sets the entry with the specified key in the NameValueCollection.(Inherited from NameValueCollection.) |
![]() | Keys | Gets the collection of header names (keys) in the collection.(Overrides NameObjectCollectionBase.Keys.) |
| Name | Description | |
|---|---|---|
![]() | Add(HttpRequestHeader, String) | Inserts the specified header with the specified value into the collection. |
![]() | Add(HttpResponseHeader, String) | Inserts the specified header with the specified value into the collection. |
![]() | Add(NameValueCollection) | Copies the entries in the specified NameValueCollection to the current NameValueCollection.(Inherited from NameValueCollection.) |
![]() | Add(String) | Inserts the specified header into the collection. |
![]() | Add(String, String) | Inserts a header with the specified name and value into the collection.(Overrides NameValueCollection.Add(String, String).) |
![]() | AddWithoutValidate(String, String) | Inserts a header into the collection without checking whether the header is on the restricted header list. |
![]() | 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.) |
![]() | Clear() | Removes all headers from the collection.(Overrides NameValueCollection.Clear().) |
![]() | CopyTo(Array, Int32) | Copies the entire NameValueCollection to a compatible one-dimensional Array, starting at the specified index of the target array.(Inherited from NameValueCollection.) |
![]() | Equals(Object) | Determines whether the specified object is equal to the current object.(Inherited from Object.) |
![]() | Finalize() | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.) |
![]() | Get(Int32) | Gets the value of a particular header in the collection, specified by an index into the collection.(Overrides NameValueCollection.Get(Int32).) |
![]() | Get(String) | Gets the value of a particular header in the collection, specified by the name of the header.(Overrides NameValueCollection.Get(String).) |
![]() | GetEnumerator() | Returns an enumerator that can iterate through the WebHeaderCollection instance.(Overrides NameObjectCollectionBase.GetEnumerator().) |
![]() | GetHashCode() | Serves as the default hash function. (Inherited from Object.) |
![]() | GetKey(Int32) | Gets the header name at the specified position in the collection.(Overrides NameValueCollection.GetKey(Int32).) |
![]() | GetObjectData(SerializationInfo, StreamingContext) | This API supports the product infrastructure and is not intended to be used directly from your code. Populates a SerializationInfo with the data needed to serialize the target object.(Overrides NameObjectCollectionBase.GetObjectData(SerializationInfo, StreamingContext).) |
![]() | GetType() | |
![]() | GetValues(Int32) | Gets an array of header values stored in the index position of the header collection.(Overrides NameValueCollection.GetValues(Int32).) |
![]() | GetValues(String) | Gets an array of header values stored in a header.(Overrides NameValueCollection.GetValues(String).) |
![]() | HasKeys() | Gets a value indicating whether the NameValueCollection contains keys that are not null.(Inherited from NameValueCollection.) |
![]() | InvalidateCachedArrays() | Resets the cached arrays of the collection to null.(Inherited from NameValueCollection.) |
![]() ![]() | IsRestricted(String) | Tests whether the specified HTTP header can be set for the request. |
![]() ![]() | IsRestricted(String, Boolean) | Tests whether the specified HTTP header can be set for the request or the response. |
![]() | MemberwiseClone() | |
![]() | OnDeserialization(Object) | Implements the ISerializable interface and raises the deserialization event when the deserialization is complete.(Overrides NameObjectCollectionBase.OnDeserialization(Object).) |
![]() | Remove(HttpRequestHeader) | Removes the specified header from the collection. |
![]() | Remove(HttpResponseHeader) | Removes the specified header from the collection. |
![]() | Remove(String) | Removes the specified header from the collection.(Overrides NameValueCollection.Remove(String).) |
![]() | Set(HttpRequestHeader, String) | Sets the specified header to the specified value. |
![]() | Set(HttpResponseHeader, String) | Sets the specified header to the specified value. |
![]() | Set(String, String) | Sets the specified header to the specified value.(Overrides NameValueCollection.Set(String, String).) |
![]() | ToByteArray() | This API supports the product infrastructure and is not intended to be used directly from your code. Converts the WebHeaderCollection to a byte array.. |
![]() | ToString() | This API supports the product infrastructure and is not intended to be used directly from your code. This method is obsolete.(Overrides Object.ToString().) |
| Name | Description | |
|---|---|---|
![]() ![]() | 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.) |
![]() ![]() | ISerializable.GetObjectData(SerializationInfo, StreamingContext) | This API supports the product infrastructure and is not intended to be used directly from your code. Serializes this instance into the specified SerializationInfo object. |
![]() ![]() | 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.) |
| Name | Description | |
|---|---|---|
![]() | AsParallel() | Overloaded. Enables parallelization of a query.(Defined by ParallelEnumerable.) |
![]() | AsQueryable() | Overloaded. Converts an IEnumerable to an IQueryable.(Defined by Queryable.) |
![]() | Cast<'TResult>() | Casts the elements of an IEnumerable to the specified type.(Defined by Enumerable.) |
![]() | OfType<'TResult>() | Filters the elements of an IEnumerable based on a specified type.(Defined by Enumerable.) |
The WebHeaderCollection class is generally accessed through WebRequest.Headers or WebResponse.Headers. Some common headers are considered restricted and are either exposed directly by the API (such as Content-Type) or protected by the system and cannot be changed.
The restricted headers are:
Accept
Connection
Content-Length
Content-Type
Date
Expect
Host
If-Modified-Since
Range
Referrer
Transfer-Encoding
User-Agent
Proxy-Connection
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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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