Cannot Update Facebook page app custom_image - facebook

Question

I am trying to update my page app image with graph api but nothing happens. i have right access token , i could change the custom_name but not custom_image.
var fbdc = new Dictionary<string, object>();
fbdc.Add("access_token", AccessToken);
fbdc.Add("custom_name", Name);
fbdc.Add("custom_image",Image);
result = fb.Post(tab.id, fbdc);
I get the result true from graph api but still the image doesnt change.My image is 111*74.jpg. i was able to upload the same image manually but not through graph api.
Am i doing some thing wrong ?

Answer 1

var fbparams = new Dictionary<string, object>();
string path = #"c:\test.jpg";
FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);
var picture = new FacebookMediaObject
{
//Tell facebook that we are sending image
ContentType = "image/jpeg",
//Give name to the image
FileName = "test"
};
//Create a new byteArray with right length
var img = tabImageInfo.Media;
//Convert the image content into bytearray
fs.Read(img, 0, img.Length);
//Close the stream
fs.Close();
//Put the bytearray into Picture
picture.SetValue(img);
//Add the image into parameters
fbparams.Add("custom_image", picture);
fb.Post(tab.id, fbparams);