How to post image on facebook fan page using C# facebook sdk on codeplex

问题

Currently I'm working on my HTML 5 ASP.Net Application, Which has requirement of Graffiti Wall, When user draw something on my Wall(means on my HTML 5 Canvas element), and Press Share Button on my Page, at that time the whole picture should need to be post on one of the Facebook Page.

Now my question is that is this thing possible using C# facebook sdk by codeplex ? if its possible, than how to post image on facebook fan page using this SDK?? Where can I get the good resource the implement this kind of functionality or similar code.

I've check the all examples given by them, there is no any example which post on the facebook fan page.

Or even other library that can implement this kind of functionality.

I've check this library, and see that it has FacebookClient,ExpandoObject, FacebookMediaObject kind of classes, but how to and where to use this classes,where are the description and sample code.

Thanks, Jigar Shah

回答1:

you can post to others wall using "{id}/feed"

if you want to post image/video on wall. Try downloading the samples from nuget.

Install-Package Facebook.Sample

Here is how to do using the graph api.

    public static string UploadPictureToWall(string id, string accessToken, string filePath)
    {
        var mediaObject = new FacebookMediaObject
                              {
                                  FileName = System.IO.Path.GetFileName(filePath),
                                  ContentType = "image/jpeg"
                              };

        mediaObject.SetValue(System.IO.File.ReadAllBytes(filePath));

        try
        {
            var fb = new FacebookClient(accessToken);

            var result = (IDictionary<string, object>)fb.Post(id + "/photos", new Dictionary<string, object>
                                   {
                                       { "source", mediaObject },
                                       { "message","photo" }
                                   });

            var postId = (string)result["id"];

            Console.WriteLine("Post Id: {0}", postId);

            // Note: This json result is not the orginal json string as returned by Facebook.
            Console.WriteLine("Json: {0}", result.ToString());

            return postId;
        }
        catch (FacebookApiException ex)
        {
            // Note: make sure to handle this exception.
            throw;
        }
    }

来源：https://stackoverflow.com/questions/5335290/how-to-post-image-on-facebook-fan-page-using-c-sharp-facebook-sdk-on-codeplex