HttpResponse.AppendHeader(String, String) Method
Definition
Important
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Adds an HTTP header to the output stream.
public:
void AppendHeader(System::String ^ name, System::String ^ value);public void AppendHeader (string name, string value);member this.AppendHeader : string * string -> unitPublic Sub AppendHeader (name As String, value As String)Parameters
- name
- String
The name of the HTTP header to add to the output stream.
- value
- String
The string to append to the header.
Exceptions
The header is appended after the HTTP headers have been sent.
Examples
The following example calls the AppendHeader method to add a custom header to the HttpResponse object sent to the requesting client.
Response.AppendHeader("CustomAspNetHeader", "Value1");
Response.AppendHeader("CustomAspNetHeader", "Value1")
Remarks
If you use the AppendHeader method to send cache-specific headers and at the same time use the cache object model (Cache) to set cache policy, HTTP response headers that pertain to caching (Cache-Control, Expires, Last-Modified, Pragma, and Vary) might be deleted when the cache object model is used. This behavior enables ASP.NET to maintain the most restrictive settings. For example, consider a page that includes user controls. If those controls have conflicting cache policies, the most restrictive cache policy will be used. If one user control sets the header "Cache-Control: Public" and another user control sets the more restrictive header "Cache-Control: Private" via calls to SetCacheability, then the "Cache-Control: Private" header will be sent with the response.
For a list of standard HTTP/1.1 headers, see Header field definitions.
