Dictionary中的双值

本文关键字：Dictionary | 更新日期: 2023-09-27 17:59:27

我有这个代码可以从jSon:中获得两个double

Dictionary<string, object> dict = this.GetDicFromInput();
Decimal tmpLat = (Decimal)dict["lat"];
Decimal tmpLon = (Decimal)dict["lon"];

这是GetDicFromInput:

private Dictionary<string, object> GetDicFromInput()
{
    string input = null;
    input = "{'"lon'":34.806109,'"lat'":31.9599733}";
    var json = new JavaScriptSerializer() { MaxJsonLength = int.MaxValue };
    Dictionary<string, object> dict = (Dictionary<string, object>)json.DeserializeObject(input);
    return dict;
}

当我运行它时，我得到：

 [NullReferenceException: Object reference not set to an instance of an object.]
   BabySitter.Search.Page_Load(Object sender, EventArgs e) in ''psf'home'Documents'Visual Studio 2010'Projects'BabySitter'BabySitter'Search.aspx.cs:28
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +91
   System.Web.UI.Control.LoadRecursive() +74
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2207

这是故障线：

Decimal tmpLat = (Decimal)dict["lat"];

Dictionary中的双值

使用泛型函数返回您正在创建的确切对象类型。

public T Deserialize<T>(string input)

在这种情况下，

Dictionary<string, object> dict = json.DeserializeObject<Dictionary<string, object>(input);
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