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.NET Core C# Web API Examples

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(.NET Core C#) Get Individual Photo Info

Assuming we have the ID of a Photo, this example demonstrates how to retrieve the photo information and parse the JSON.

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// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// This example assumes a previously obtained an access token
Chilkat.OAuth2 oauth2 = new Chilkat.OAuth2();
oauth2.AccessToken = "FACEBOOK-ACCESS-TOKEN";

Chilkat.Rest rest = new Chilkat.Rest();

// Connect to Facebook...
bool success = rest.Connect("graph.facebook.com",443,true,true);
if (success != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

// Provide the authentication credentials (i.e. the access key)
rest.SetAuthOAuth2(oauth2);

// Assumes we've already obtained a Photo ID.
string photoId = "10210199026347451";

Chilkat.StringBuilder sbPath = new Chilkat.StringBuilder();
sbPath.Append("/v2.7/");
sbPath.Append(photoId);

// Select the fields we want.
// This example will select many of the possible fields.
// See https://developers.facebook.com/docs/graph-api/reference/photo/
rest.AddQueryParam("fields","id,album,can_delete,can_tag,from,height,width,images,link,name,name_tags,picture,place,target");

string responseJson = rest.FullRequestNoBody("GET",sbPath.GetAsString());
if (rest.LastMethodSuccess != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

Chilkat.JsonObject json = new Chilkat.JsonObject();
json.EmitCompact = false;
json.Load(responseJson);

// Show the JSON in human-readable format.
Debug.WriteLine(json.Emit());

// A sample response is shown below.
// Demonstrate how to parse values from the JSON.
Debug.WriteLine("Album name: " + json.StringOf("album.name"));
bool canDelete = json.BoolOf("can_delete");
Debug.WriteLine("Can Delete: " + Convert.ToString(canDelete));
Debug.WriteLine("From Name: " + json.StringOf("from.name"));
int height = json.IntOf("height");
int width = json.IntOf("width");
Debug.WriteLine("Dimensions: " + Convert.ToString(width) + "x" + Convert.ToString(height));
Debug.WriteLine("First Image Source: " + json.StringOf("images[0].source"));

// A sample JSON response is shown here.  
// { 
//   "id": "10210199026347451",
//   "album": { 
//     "created_time": "2009-10-19T00:06:46+0000",
//     "name": "Timeline Photos",
//     "id": "1237223526054"
//   },
//   "can_delete": true,
//   "can_tag": true,
//   "from": { 
//     "name": "Matt Smith",
//     "id": "10224048320139890"
//   },
//   "height": 120,
//   "width": 120,
//   "images": [
//     { 
//       "height": 120,
//       "source": "https:\/\/scontent.xx.fbcdn.net\/v\/t1.0-9\/14462791_10210199026347451_7830642117574407060_n.jpg?oh=a7f9ed10cf9cd81a82adeb541c60e2e2&oe=58ABB195",
//       "width": 120
//     }
//   ],
//   "link": "https:\/\/www.facebook.com\/photo.php?fbid=10210199026347451&set=a.1237223526054.2038240.1093202869&type=3",
//   "name": "Ignore my posts -- I'm doing some testing for Facebook related programming...",
//   "picture": "https:\/\/scontent.xx.fbcdn.net\/v\/t1.0-9\/14462791_10210199026347451_7830642117574407060_n.jpg?oh=a7f9ed10cf9cd81a82adeb541c60e2e2&oe=58ABB195"
// }
// 

 

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