将json反序列化为T列表 [英] Deserialize json to list of T
本文介绍了将json反序列化为T列表的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
Hi, I want deserialize the data into list GoogleImageURLs but following code returns 0 records. Please help Thanks.
[DataContract]
public class GoogleImageURL : BindableBase
{
#region Feilds
private int _width;
private int _height;
private string _imageId;
private int _tbWidth;
private int _tbHeight;
private string _unescapedUrl;
private string _url;
private string _visibleUrl;
private string _title;
private string _titleNoFormatting;
private string _originalContextUrl;
private string _content;
private string _contentNoFormatting;
private string _tbUrl;
#endregion
#region Properties
[DataMember]
public int width
{
get{return _width;}
set
{
if(_width != value)
{
_width = value;
OnPropertyChanged("width");
}
}
}
[DataMember]
public int height
{
get{return _height;}
set
{
if(_height != value)
{
_height = value;
OnPropertyChanged("height");
}
}
}
[DataMember]
public string imageId
{
get{return _imageId;}
set
{
if(_imageId != value)
{
_imageId = value;
OnPropertyChanged("imageId");
}
}
}
[DataMember]
public int tbWidth
{
get{return _tbWidth;}
set
{
if(_tbWidth != value)
{
_tbWidth = value;
OnPropertyChanged("tbWidth");
}
}
}
[DataMember]
public int tbHeight
{
get{return _tbHeight;}
set
{
if(_tbHeight != value)
{
_tbHeight = value;
OnPropertyChanged("tbHeight");
}
}
}
[DataMember]
public string unescapedUrl
{
get{return _unescapedUrl;}
set
{
if(_unescapedUrl != value)
{
_unescapedUrl = value;
OnPropertyChanged("unescapedUrl");
}
}
}
[DataMember]
public string url
{
get{return _url;}
set
{
if(_url != value)
{
_url = value;
OnPropertyChanged("url");
}
}
}
[DataMember]
public string visibleUrl
{
get{return _visibleUrl;}
set
{
if(_visibleUrl != value)
{
_visibleUrl = value;
OnPropertyChanged("visibleUrl");
}
}
}
[DataMember]
public string title
{
get{return _title;}
set
{
if(_title != value)
{
_title = value;
OnPropertyChanged("title");
}
}
}
[DataMember]
public string titleNoFormatting
{
get{return _titleNoFormatting;}
set
{
if(_titleNoFormatting != value)
{
_titleNoFormatting = value;
OnPropertyChanged("titleNoFormatting");
}
}
}
[DataMember]
public string originalContextUrl
{
get{return _originalContextUrl;}
set
{
if(_originalContextUrl != value)
{
_originalContextUrl = value;
OnPropertyChanged("originalContextUrl");
}
}
}
[DataMember]
public string content
{
get{return _content;}
set
{
if(_content != value)
{
_content = value;
OnPropertyChanged("content");
}
}
}
[DataMember]
public string contentNoFormatting
{
get{return _contentNoFormatting;}
set
{
if(_contentNoFormatting != value)
{
_contentNoFormatting = value;
OnPropertyChanged("contentNoFormatting");
}
}
}
[DataMember]
public string tbUrl
{
get { return _tbUrl; }
set
{
if (_tbUrl != value)
{
_tbUrl = value;
OnPropertyChanged("tbUrl");
}
}
}
#endregion
public static void GetData(string p_SearchString)
{
try
{
//WebClient webClient = new WebClient();//Create WebClient Object.
//string json = webClient.DownloadString("https://ajax.googleapis.com/ajax/services/search/images?v=1.0&q=" + p_SearchString);
WebClient wc = new WebClient();
wc.UseDefaultCredentials = true;
var data = wc.DownloadString("https://ajax.googleapis.com/ajax/services/search/images?v=1.0&q=" + p_SearchString);
MemoryStream ms = new MemoryStream(Encoding.Unicode.GetBytes(data));
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(List<GoogleImageURL>));
var result = serializer.ReadObject(ms);
List<GoogleImageURL> urls = (List<GoogleImageURL>)result;
ms.Close();
ms.Dispose();
}
catch
{
throw;
}
}
推荐答案
首先，测试数据模型。创建一些数据实例（具有非零数量的记录）。使用DataContractJsonSerializer，将此数据写入某个文件，然后读取并写入另一个文件，比较，亲眼检查。并与从网站下载的JSON文件进行比较。
-SA
First, test you data model. Create some instance of data (with non-zero number of records). UsingDataContractJsonSerializer, write this data in some file, then read it and write to another file, compare, review with your own eyes. And compare with the JSON file downloaded from the site.
—SA
1。尝试使用HttpClient而不是WebClient。它可以读取并返回一个字符串，你没有经历使用内存流的麻烦。
2.我从这个api收到的Json如下：
{结果：[... GoogleImageUrls列表..]}
因此，创建一个类型为ImageResults，其属性为GoogleImageUrls列表。这样你就可以将结果序列化（如果你使用建议＃1，这要容易得多）并访问该属性以获取你的列表。
1. Try a HttpClient instead of WebClient. It can read and return a string and you don't have go through the trouble of using a memorystream.
2. The Json I received from this api is as follows:
{"results":[...list of GoogleImageUrls..]}
So create a type say ImageResults that has a property of a list of GoogleImageUrls. That way you can just serialize the results (if you use suggestion #1, it is far easier) to this type and access the property to get your list.
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