private ApplicationDataContainer appSetting = ApplicationData.Current.LocalSettings; //本地存储
public async void Run(IBackgroundTaskInstance taskInstance)
{
if (bool.Parse(appSetting.Values["isUseingBackgroundTask"].ToString()))
{
Debug.WriteLine("开始吐司通知后台任务");
var vault = new Windows.Security.Credentials.PasswordVault();
var credentialList = vault.FindAllByResource(resourceName);
credentialList[0].RetrievePassword();
stuNum = credentialList[0].UserName;
idNum = credentialList[0].Password;
try
{
string letterstatus = "";
BackgroundTaskDeferral deferral = taskInstance.GetDeferral(); //获取 BackgroundTaskDeferral 对象，表示后台任务延期
List <KeyValuePair <String, String> > paramList = new List <KeyValuePair <String, String> >();
paramList.Add(new KeyValuePair <string, string>("stuNum", stuNum));
paramList.Add(new KeyValuePair <string, string>("idNum", idNum));
paramList.Add(new KeyValuePair <string, string>("page", "0"));
paramList.Add(new KeyValuePair <string, string>("size", "15"));
letterstatus = await NetWork.getHttpWebRequest("cyxbsMobile/index.php/Home/Article/aboutme", paramList);
Debug.WriteLine("letterstatus" + letterstatus);
if (letterstatus != "")
{
string aboutme = "";
IStorageFolder applicationFolder = ApplicationData.Current.LocalFolder;
try
{
IStorageFile storageFileRE = await applicationFolder.GetFileAsync("aboutme.txt");
IRandomAccessStream accessStream = await storageFileRE.OpenReadAsync();
using (StreamReader streamReader = new StreamReader(accessStream.AsStreamForRead((int)accessStream.Size)))
{
aboutme = streamReader.ReadToEnd();
}
Debug.WriteLine("aboutme：" + aboutme);
if (aboutme != letterstatus)
{
JObject obj = JObject.Parse(letterstatus);
if (Int32.Parse(obj["status"].ToString()) == 200)
{
JArray jArray = (JArray)JsonConvert.DeserializeObject(obj["data"].ToString());
if (jArray[0]["type"].ToString() == "praise")
{
Utils.Toast(jArray[0]["nickname"].ToString() + "赞了你~~\n你可能还有有新的消息，快来看看吧");
}
else if (jArray[0]["type"].ToString() == "remark")
{
Utils.actionsToast(jArray[0]["nickname"].ToString() + " 评论了 " + "\"" + jArray[0]["article_content"].ToString() + "\"", "\"" + jArray[0]["content"].ToString() + "\"", jArray[0]["article_id"].ToString() + "+" + jArray[0]["stunum"] + "+" + jArray[0]["nickname"]);
//if (jArray[0]["content"].ToString().Length > 20)
//{
// Utils.Toast(jArray[0]["nickname"].ToString() + "评论了你~\n" + "\"" + jArray[0]["content"].ToString().Substring(0, 20) + "\"" + "\n你可能还有有新的消息，快来看看吧");
//}
//else
//{
// Utils.Toast(jArray[0]["nickname"].ToString() + "评论了你~\n" + "\"" + jArray[0]["content"].ToString() + "\"" + "\n你可能还有有新的消息，快来看看吧");
//}
}
else
{
Utils.Toast("你可能有新的消息，快来看看吧");
}
}
IStorageFile storageFileWR = await applicationFolder.CreateFileAsync("aboutme.txt", CreationCollisionOption.ReplaceExisting);
await FileIO.WriteTextAsync(storageFileWR, letterstatus);
}
}
catch (FileNotFoundException)
{
IStorageFile storageFileWR = await applicationFolder.CreateFileAsync("aboutme.txt", CreationCollisionOption.ReplaceExisting);
await FileIO.WriteTextAsync(storageFileWR, letterstatus);
}
}
deferral.Complete(); //所有的异步调用完成之后，释放延期，表示后台任务的完成
Debug.WriteLine("吐司通知后台任务结束");
}
catch (Exception)
{
Debug.WriteLine("吐司通知后台任务异常");
}
}
}
