使用Facebook C# SDK开发facebook web app（入门及一些资源）

如果不放，就会脚本报错。放哪儿都行，也不显示。但是要放在fb初始话的脚本前面。

3、写段脚本吧，这里我们有个登录按钮：

            FB.init({ appId: ‘{这里是appid}’, status: true, cookie: true, xfbml: true });
$(“#FBLogin”).click(function () {
FB.login(function (response) {
if (response.session) {
// 登录成功
window.location = ‘about.aspx’
} else {
//
}
}, { perms: “publish_stream” });
});

这里首先初始化了fb对象，需要appid，它在创建时自动生成。第二个呢注册了一个登录按钮的点击事件，点击后直接调用FB封装好的login方法，第一个参数是回调函数，第二个参数是一个json对象，这里注明了该app的访问权限是publish_stream，差不多是最小权限了吧。

所有权限的资料和其他api的资料可以直接访问以下地址查找：

https://developers.facebook.com/docs/

刚入个门，其实后面的对照文档中的，就都可以了，比如fql：

FB.api({
method: ‘fql.query’,
query: ‘SELECT name, pic FROM profile WHERE id=’ + uid
}, function(response){
fb_User.name = response[0].name;
fb_User.pic = response[0].pic;
…

});
这是访问用户配置表，返回用户名称和头像。

graph api相比更加简单，先看例子

FB.api({path}, ‘GET’, {}, function(response){
if (!response || response.error) {
alert(‘Error occured’);
}
else {
…
}
})

path就是对应访问内容的路径，比如访问个人资料，就填me，访问某视频的信息，可以直接填视频的id。很简单吧，回调函数中都是返回的json对象，书写也很便利。

项目用到一半，除了登入退出外，也就用了这么两类的api，很简单吧。

Facebook C# SDK

项目开始时查到过两个SDK，一个叫做Facebook C# SDK，更新的很快；另一个叫做Facebook toolkit什么的，从名字上看似乎是微软自己的帮助系列，代码也很庞大，但有半年多没有更新了。而据我所知，今年6月份facebook的api还有改动（突然某天代码失效，后来发现api改了，竟然不兼容！）。所以我们选择更新的比较快的这个。

代码地址：

http://facebooksdk.codeplex.com/

仅支持vs2010，你可以下载了dll然后加载到项目的引用中去。今天我们介绍另外一种引用方式：

1、在vs2010中，新建web站点（以次举例，也支持mvc、windowsphone），右键项目，选择 Add Library Package Reference，

把最后那两个安装仅上就可以了。如果没有看到的话，可以从右侧搜索facebook就可以找到了。安装上之后，不仅对应的dll会被拷贝进了，web.config中也会生成对应的两段配置

configSections段中增加了

configuration段中增加了

我们把我们申请到的appid和appsecret填入即可。

前台的页面我们还是需要按照前面讲的javascript的方式进行编写，只是我们appid的位置可以这么写：

        <%: Facebook.FacebookApplication.Current.AppId %>

到这里，第一步也算迈出去了。详细使用方法，我们举几个例子：

获取用户信息：

// Using dynamic (.Net 4.0 only)  
var client = new FacebookClient();  
dynamic me = client.Get("me");  
string firstName = me.first\_name;  
string lastName = me.last\_name;  
string email = me.email;  
  
// Using IDictionary<string, object> (.Net 3.5, .Net 4.0, WP7)  
var client = new FacebookClient();  
var me = (IDictionary<string,object>)client.Get("me");  
string firstName = (string)me\["first\_name"\];  
string lastName = (string)me\["last\_name"\];  
string email = (string)me\["email"\];

获取某一条post的详细信息

// Using dynamic (.Net 4.0 only)  
var client = new FacebookClient("my\_access\_token");  
dynamic result = client.Get("19292868552\_118464504835613");  
string id = result.id;  
string fromName = result.from.name;  
string fromCategory = result.from.category;  
string message = result.message;  
int likes = result.likes;  
foreach (dynamic comment in result.comments.data) {  
  string commentId = comment.id;  
  string commentMessage = comment.message;  
}

发布一条信息

var client = new FacebookClient("my\_access\_token");  
dynamic parameters = new ExpandoObject();  
parameters.message = "Check out this funny article";  
parameters.link = "http://www.example.com/article.html";  
parameters.picture = "http://www.example.com/article-thumbnail.jpg";  
parameters.name = "Article Title";  
parameters.caption = "Caption for the link";  
parameters.description = "Longer description of the link";  
parameters.actions = new {  
  name = "View on Zombo",  
  link = "http://www.zombo.com",  
};  
parameters.privacy = new {  
  value = "ALL\_FRIENDS",  
};  
parameters.targeting = new {  
  countries = "US",  
  regions = "6,53",  
  locales = "6",  
};  
dynamic result = client.Post("me/feed", parameters);

访问ADS API

var client = new FacebookClient("my\_access\_token");  
  
dynamic reportSpec = new ExpandoObject();  
reportSpec.report\_type = "perf";  
reportSpec.summarize\_by = "ad";  
reportSpec.agg\_time = "daily";  
reportSpec.filter\_obj\_ids = new string\[\] { };  
reportSpec.internal\_columns = false;  
reportSpec.time\_start\_offset = 172800;  
reportSpec.time\_stop\_offset = 86400;  
  
dynamic scheduleSpec = new ExpandoObject();  
scheduleSpec.name = "test\_schedule";  
scheduleSpec.time\_next\_ref = DateTime.UtcNow.AddDays(1).ToString();  
scheduleSpec.report\_spec = reportSpec;  
scheduleSpec.frequency = 1;  
scheduleSpec.status = 1;  
scheduleSpec.email = 1;  
  
dynamic parameters = new ExpandoObject();  
parameters.method = "ads.createAdreportSchedules";  
parameters.account\_id = 1234567891235;  
parameters.schedule\_specs = scheduleSpecs;  
parameters.flags = 1; // Debug Mode  
  
dynamic result = client.Post(parameters);

创建相册

  // create album  
  dynamic albumDetails = new ExpandoObject();  
  albumDetail.name = "test album";  
  
  dynamic fbResult = fbApp.Post('/me/albums', albumDetails);  
  var albumID = fbResult.id;  
  uploadPhotos(albumId);

上传图片

        private void uploadPhoto(string albumID)  
        {  
            var fbUpl = new Facebook.FacebookMediaObject  
            {  
                FileName = @"Some.png",  
                ContentType = "image/png"  
            };  
            var bytes = System.IO.File.ReadAllBytes(@"C:somePath" + fbUpl.FileName);  
            fbUpl.SetValue(bytes);  
  
            var photoDetails = new Dictionary<string, object>();  
            photoDetails.Add("message", "test photo"); // this will appear on the wall  
            photoDetails.Add("image", fbUpl); // the name of this parameter does not matter  
            var fbResult = fbApp.Post(@"/" + albumID + @"/photos", photoDetails);  
            var result = (IDictionary<string, object>)fbResult; // Or we could use dynamic.. only the photo "id"(s) come back  
        }

上传视频

var fb = new FacebookClient("access_token");

dynamic parameters = new ExpandoObject();

parameters.source = new FacebookMediaObject { ContentType = "video/3gpp", FileName = "video.3gp" }.SetValue(File.ReadAllBytes(@"c:video.3gp"));

parameters.title = "video title";

parameters.description = "video description";

dynamic result = fb.Post("/me/videos", parameters);

Console.WriteLine(result);

可获的进度条和可取消的使用方式

var mediaObject = new FacebookMediaObject

{

ContentType = "image/jpeg",

FileName = Path.GetFileName(_filename)

}

.SetValue(File.ReadAllBytes(_filename));

var fb = new FacebookClient(_accessToken);

fb.PostCompleted += fb_PostCompleted;

fb.PostAsync("/me/photos", new Dictionary<string, object> { { "source", mediaObject } });

fb.UploadProgressChanged += fb_UploadProgressChanged;

public void fb_UploadProgressChanged(object sender, FacebookUploadProgressChangedEventArgs e)

{

progressBar1.BeginInvoke(

new MethodInvoker(() =>

{

var totalBytesToSend = e.TotalBytesToSend;

var bytesSent = e.BytesSent;

var state = e.UserState;

progressBar1.Value = e.ProgressPercentage;

}));

}

public void fb_PostCompleted(object sender, FacebookApiEventArgs e)

{

if (e.Cancelled)

{

var cancellationError = e.Error;

MessageBox.Show("Upload cancelled");

}

else if (e.Error == null)

{

// upload successful.

MessageBox.Show(e.GetResultData().ToString());

}

else

{

// upload failed

MessageBox.Show(e.Error.Message);

}

}

可以使用fb.CancelAsync()进行结束上传。好了就举这些例子吧，例子代码来源于作者博客。总体感觉使用还是比较方便的。