How to add the Content-Length,Content-Type and Last-Modified to the HTTP Response Message Header

5
votes

How to add the Content-Length,Content-Type and Last-Modified to the HttpResponseMessage Header using .net.

I need to append the all these values manually to the response after adding these fields i need to return the response from the server. I have tried to adding these fields in fallowing way 

httpResponse.Content.Headers.Add("Content-Length", item.Size.ToString());
httpResponse.Content.Headers.Add("Content-Type", item.ContentType);

But it throwing the exception as

"Object reference not set to an instance of an object".

If i am adding like this

httpResponse.Headers.Add("Content-Length", item.Size.ToString());
httpResponse.Headers.Add("Content-Type", item.ContentType);

I am getting the fallowing error

"Misused header name. Make sure request headers are used with HttpRequestMessage, response headers with HttpResponseMessage, and content headers with HttpContent objects."

Please any one help me to add these fields to the HttpResponsesMessage .

1
c#.nethttpresponse
possible duplicate of adding header to http response in an action inside a controller in asp.net/mvc – Zaid Amir
Have you initialized httpResponse? – Tim
yes, I have initialized http response – purna.n
I don't want to use the Http Context – purna.n
Have you initialized item? – Tim

1 Answers

10
votes

You basically need to initialise Content first. For example:

var content = "this is some content";
var response = new HttpResponseMessage
{
    Content = new StringContent(content)
};
response.Content.Headers.Add(@"Content-Length", content.Length.ToString());