{"id":8672,"date":"2017-06-26T23:17:35","date_gmt":"2017-06-26T14:17:35","guid":{"rendered":"http:\/\/www.moonmile.net\/blog\/?p=8672"},"modified":"2017-06-28T09:51:01","modified_gmt":"2017-06-28T00:51:01","slug":"%e7%b6%99%e6%89%bf%e5%8f%af%e8%83%bd%e3%81%aadynamicobject%e3%82%92%e4%bd%9c%e3%82%8d%e3%81%86%e3%81%a8%e3%81%97%e3%81%9f%e3%81%8c%e6%8c%ab%e6%8a%98%e4%b8%ad","status":"publish","type":"post","link":"https:\/\/www.moonmile.net\/blog\/archives\/8672","title":{"rendered":"\u7d99\u627f\u53ef\u80fd\u306aDynamicObject\u3092\u4f5c\u308d\u3046\u3068\u3057\u305f\u304c\u632b\u6298\u4e2d"},"content":{"rendered":"

Xamarin.Forms \u7528\u306e\u8d85\u8efd\u91cf\u30d7\u30ec\u30d3\u30e5\u30fc\u30a2\u3092\u4f5c\u308b | Moonmile Solutions Blog
\nhttp:\/\/www.moonmile.net\/blog\/archives\/8669<\/a><\/p>\n

\u3067\u3001XAML\u306b\u30af\u30ea\u30c3\u30af\u30a4\u30d9\u30f3\u30c8\u304c\u5165\u3063\u3066\u3044\u308b\u3068 XamlLoader \u304c\u30d1\u30fc\u30b9\u30a8\u30e9\u30fc\u306b\u306a\u308b\u306e\u3067\u3001\u305d\u306e\u30a4\u30d9\u30f3\u30c8\u3092\u3046\u307e\u3044\u5177\u5408\u306b\u7121\u8996\u3057\u306a\u3051\u308c\u3070\u3044\u3051\u306a\u3044\u306e\u3067\u3059\u304c\u3001\u3058\u3083\u3042\u3001\u3082\u3068\u3082\u3068\u3042\u308b ContentPage \u30af\u30e9\u30b9\u306b\u5f8c\u304b\u3089\u30a4\u30d9\u30f3\u30c8\u3092\u8ffd\u52a0\u3067\u304d\u305f\u3089\u3046\u307e\u304f\u30b9\u30eb\u30fc\u3067\u304d\u308b\u306e\u3067\u306f\u306a\u3044\u304b\uff1f\u3068\u601d\u3063\u3066\u3001\u7d99\u627f\u53ef\u80fd\u306a DynamicObject \u3092\u63a2\u3057\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n

\u6b63\u78ba\u306b\u8a00\u3048\u3070\u3001DynamicObject \u306f\u7d99\u627f\u53ef\u80fd\u306a\u306e\u3067\u3001<\/p>\n

\r\npublic class DynamicViewModel : DynamicObject\r\n{\r\n    Dictionary<string, object> dic = new Dictionary<string, object>();\r\n\r\n    public override bool TryGetMember(GetMemberBinder binder, out object result)\r\n    {\r\n        return dic.TryGetValue(binder.Name, out result);\r\n    }\r\n    public override bool TrySetMember(SetMemberBinder binder, object value)\r\n    {\r\n        dic[binder.Name] = value;\r\n        return true;\r\n    }\r\n}\r\n<\/pre>\n
\u306a\u611f\u3058\u3067 DynamicObject \u3092\u7d99\u627f\u3057\u305f ViewModel \u3092\u4f5c\u3063\u3066\u304a\u3044\u3066\u3001\u5f8c\u8ffd\u3044\u3067\u6b21\u306e\u3088\u3046\u306b\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u5897\u3084\u3059\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n
\r\ndynamic vm = new DynamicViewModel();\r\nvm.Title = "Hello";\r\nvar title = vm.Title;\r\n<\/pre>\n
dynamic \u306a\u306e\u3067\u3001\u30a4\u30f3\u30c6\u30ea\u30bb\u30f3\u30b9\u306f\u52b9\u304b\u306a\u3044\u3051\u3069\u3001\u3046\u307e\u304f\u304f\u308b\u3081\u3070 XML \u3084 JSON \u3092\u30de\u30c3\u30d4\u30f3\u30b0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3061\u306a\u307f\u306b\u3001Newtonsoft.Json.Linq.JObject \u3092\u4f7f\u3046\u3068\u3001WPF \u306e ViewModel \u3068\u3057\u3066\u305d\u306e\u307e\u307e\u4f7f\u3048\u307e\u3059\u3002\u4f55\u6545\u304b\u3001Xamarin.Forms \u3067\u306f\u4f7f\u3048\u306a\u3044\u306e\u3067\u3001\u547c\u3073\u51fa\u3057\u65b9\u304c\u5fae\u5999\u306b\u9055\u3046\u306e\u304b\u306a\u3068\u3002\u547c\u3073\u51fa\u305b\u308b\u307b\u3046\u304c\u4e0d\u601d\u8b70\u306a\u611f\u3058\u304c\u3059\u308b\u306e\u3067\u3059\u304c\u3002.NET Framework \u3068 Profile259 \u306e Runtime \u306e\u9055\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n
DynamicViewModel \u306a\u65b9\u6cd5\u306f\u3001ASP.NET \u306e ViewBag \u306b\u3082\u4f7f\u308f\u308c\u3066\u3044\u308b\u306e\u3067\u5272\u3068\u30dd\u30d4\u30e5\u30e9\u30fc\u306a\u624b\u6bb5\u3067\u3059\u3002\u8a73\u7d30\u306f\u3001<\/p>\n
\u30e1\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0.NET | Kevin Hazzard, Jason Bock
\nhttps:\/\/www.amazon.co.jp\/dp\/4048867741<\/a><\/p>\n
\u306a\u672c\u306b\u3082\u66f8\u3044\u3066\u3042\u308a\u307e\u3059\u3002\u968f\u5206\u524d\u3060\u3051\u3069\u3001<\/p>\n
MVVM\u30d1\u30bf\u30fc\u30f3\u3067ViewModel\u3092\u697d\u306b\u4f5c\u308b\u65b9\u6cd5 – \u304b\u305a\u304d\u306eBlog@hatena
\nhttp:\/\/blog.okazuki.jp\/entry\/20100702\/1278056325<\/a><\/p>\n
\u306a\u3068\u3053\u308d\u3067\u3001MSDN \u30de\u30ac\u30b8\u30f3\u3078\u306e\u30ea\u30f3\u30af\u3082\u3042\u308a\u307e\u3059\u3002\u3068\u8a00\u3046\u8a33\u3067\u3001\u3058\u3083\u3042\u3001DynamicObject \u3092\u7d99\u627f\u3057\u3066 ContentPage \u306b\u5f8c\u4ed8\u3051\u3067 Clicked \u306a\u30e1\u30bd\u30c3\u30c9\u3092\u751f\u3084\u3059\u3053\u3068\u304c\u3067\u304d\u308b\u3093\u3058\u3083\u306a\u3044\u3060\u308d\u3046\u304b\u3001\u3068\u8003\u3048\u3066\u3001<\/p>\n
\r\npublic class SubPage : ContentPage, DynamicObject\r\n{\r\n    public SubPage() { }\r\n\r\n    \/*\r\n    private void Button_Clicked(object sender, EventArgs e)\r\n    {\r\n\r\n    }\r\n    *\/\r\n    public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)\r\n    {\r\n        \/\/ \u8aad\u307f\u6368\u3066\r\n        System.Diagnostics.Debug.WriteLine("called: " + binder.Name);\r\n        result = null;\r\n        return true;\r\n    }\r\n}\r\n<\/pre>\n
\u306a\u3053\u3068\u3092\u8003\u3048\u305f\u306e\u3067\u3059\u304c\u3001\u30c0\u30e1\u3067\u3059\u3002C# \u306f\u591a\u91cd\u7d99\u627f\u304c\u3067\u304d\u306a\u3044\u304b\u3089\u3001ContentPage \u3068 DynamicObject \u306e\u4e21\u65b9\u3092\u57fa\u5e95\u306b\u6301\u3064\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u3093\u3067\u3059\u306d\u3002\u3058\u3083\u3042\u3001\u3069\u3063\u3061\u304b\u3092\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u3057\u3066\u3001\u5185\u90e8\u3067\u518d\u5b9f\u88c5\u3055\u305b\u308c\u3070\u3044\u3044\u3068\u601d\u3063\u305f\u308f\u3051\u3067\u3001\u3068\u306a\u308b\u3068 DynamicObject \u306e\u307b\u3046\u3092\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u3057\u305f\u3044\u3067\u3059\u3088\u306d\u3002\u3063\u3066\u3053\u3068\u3067\u3042\u308c\u3053\u308c\u63a2\u3059\u3068\u305d\u308c\u3063\u307d\u3044\u3082\u306e\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n
remi\/MetaObject: Simple dynamic method invocation for your .NET objects
\nhttps:\/\/github.com\/remi\/MetaObject<\/a><\/p>\n
IDynamicMetaObjectProvider \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4ed8\u3051\u3066\u3001\u5185\u90e8\u7684\u306b\u518d\u5b9f\u88c5\u3057\u3088\u3046\u3068\u3044\u3046\u8a66\u307f\u3067\u3059\u3002<\/p>\n
\r\npublic class DynamicContnetPage : ContentPage, IDynamicMetaObjectProvider\r\n{\r\n    #region MetaObject\r\n    public DynamicMetaObject GetMetaObject(System.Linq.Expressions.Expression e)\r\n    {\r\n        return new MetaObject(e, this);\r\n    }\r\n    #endregion\r\n\r\n    Dictionary<string, object>; dic = new Dictionary<string, object>();\r\n\r\n    public virtual System.Collections.Generic.IEnumerable<string> GetDynamicMemberNames()\r\n    {\r\n        \/\/ return Value.GetDynamicMemberNames();\r\n        return new string[] { };\r\n    }\r\n\r\n    public virtual bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)\r\n    {\r\n        result = null;\r\n        return true;\r\n    }\r\n    public virtual bool TryGetMember(GetMemberBinder binder, out object result)\r\n    {\r\n        return dic.TryGetValue(binder.Name, out result);\r\n    }\r\n    public virtual bool TrySetMember(SetMemberBinder binder, object value)\r\n    {\r\n        dic[binder.Name] = value;\r\n        return true;\r\n    }\r\n}\r\n<\/pre>\n
\u3053\u3093\u306a\u98a8\u306b MetaObject \u3092\u4f7f\u3063\u3066\u304a\u304f\u3068\u3001<\/p>\n
\r\npublic class SubPage : DynamicContnetPage\r\n{\r\n    public SubPage() { }\r\n\r\n    public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)\r\n    {\r\n        \/\/ \u8aad\u307f\u6368\u3066\r\n        System.Diagnostics.Debug.WriteLine("called: " + binder.Name);\r\n        result = null;\r\n        return true;\r\n    }\r\n}\r\n<\/pre>\n
\u3053\u3093\u306a\u98a8\u306b\u3001Clicked \u30a4\u30d9\u30f3\u30c8\u3084\u3089\u3092\u8aad\u307f\u6368\u3066\u3066\u304f\u308c\u308b\u306f\u305a\u3067\u3059\u3002\u4e2d\u8eab\u3067\u4f55\u304b\u5b9f\u88c5\u3059\u308c\u3070\u3001\u30c7\u30d0\u30c3\u30b0\u30ed\u30b0\u3068\u304b\u901a\u4fe1\u3063\u307d\u3044\u3082\u306e\u3082\u3067\u304d\u307e\u3059\u306d\u3002\u3053\u306e\u3042\u305f\u308a\u306f\u3001\u5b9f DynamicObject \u306e\u30b3\u30fc\u30c9\u3092\u898b\u308b\u3068\u3044\u3044\u306e\u3067\u3059\u304c\u3001\u4e2d\u8eab\u7684\u306b IDynamicMetaObjectProvider \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c DynamicMetaObject GetMetaObject(Expression parameter) \u3092\u8981\u6c42\u3059\u308b\u306e\u3067\u30e1\u30bf\u30c7\u30fc\u30bf\u3092\u7528\u610f\u3057\u3066\u304a\u304b\u306a\u3044\u3068\u3044\u3046\u4ed5\u7d44\u307f\uff06\u5236\u9650\u306a\u306e\u3067\u3059\u3002\u3067\u3082\u3063\u3066\u3001\u3053\u308c\u304c\u300c\u5f0f Expression\u300d\u3092\u8981\u6c42\u3059\u308b\u3068\u3044\u3046\u30e1\u30bf\u69cb\u9020\u306b\u306a\u3063\u3066\u3044\u3066\u3001\u3048\u3089\u3044\u5927\u5909\u306a\u3053\u3068\u306b\u306a\u3063\u3066\u307e\u3059\u3002<\/p>\n
\u3055\u3066\u3001\u3053\u308c\u3067\u4e07\u4e8b\u89e3\u6c7a\u3068\u601d\u3044\u304d\u3084\u3001\u3044\u3056\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3066\u307f\u308b\u3068\u3001MetaObject \u306e\u30b3\u30fc\u30c9\u304c\u30d3\u30eb\u30c9\u3067\u304d\u307e\u305b\u3093\u3002\u306a\u3093\u3068\u3001MetaObject \u306f .NET Framework \u5c02\u7528\u306a\u3093\u3067\u3059\u306d\u3002\u3042\u3042\u3001Xamarin.Forms \u306e PCL \u306f Profile259 \u306a\u306e\u3067 .NET Runtime \u3092\u4f7f\u3046\u8a33\u306a\u306e\u3067\u3001\u5fae\u5999\u306b\u7570\u306a\u308b\u8a33\u3067\u3059\u3002\u4ed5\u65b9\u304c\u306a\u3044\u306e\u3067\u3001Runtime \u306e\u307b\u3046\u306b\u66f8\u304d\u76f4\u305d\u3046\u304b\u3068\u3057\u305f\u3089\u6848\u306e\u5b9a System.Reflection \u306e\u4e2d\u8eab\u304c\u9055\u3046\u306e\u3067\u3001GetMethod \u3092 GetRuntimeMethod \u306b\u76f4\u3057\u305f\u308a\u3057\u306a\u304c\u3089\u3001\u3048\u3048\u3001GetConstructor \u304c\u306a\u3044\u306e\u3067\u3001GetTypeInfo().DeclaredConstructors \u306b\u5909\u3048\u3066\u307f\u305f\u308a\u3068\u3001\u3042\u308c\u3053\u308c\u3068\u30d3\u30eb\u30c9\u304c\u901a\u308b\u3088\u3046\u306b\u4fee\u6b63\u3002<\/p>\n
\u3067\u3001\u306a\u3093\u3068\u304b\u30d3\u30eb\u30c9\u304c\u901a\u3063\u305f\u3082\u306e\u3092 Xamarin.Forms \u306e PCL \u306b\u914d\u7f6e\u3057\u3066\u3044\u3056\u3001XamlLoader \u3092\u52d5\u304b\u3059\u3068\u3001\u55da\u547c\u3001TryInvokeMember \u304c\u547c\u3073\u51fa\u3055\u308c\u308b\u524d\u306b\u4f8b\u5916\u3092\u306f\u3044\u3066\u843d\u3061\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u3069\u3046\u3084\u3089\u3001XAML \u306b Clicked \u30a4\u30d9\u30f3\u30c8\u3092\u66f8\u304f\u3068 XAML \u3092\u30d1\u30fc\u30b9\u3059\u308b\u3068\u304d\u306b\u5bfe\u5fdc\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3092\u63a2\u3057\u3066\u3057\u307e\u3046\u3089\u3057\u3044\u3093\u3067\u3059\u306d\u3002<\/p>\n
\r\nSystem.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> Xamarin.Forms.Xaml.XamlParseException: Position 13:37. No method Button_Clicked found on type XamlPreview.SubPage\r\n  at Xamarin.Forms.Xaml.ApplyPropertiesVisitor.SetPropertyValue (System.Object xamlelement, Xamarin.Forms.Xaml.XmlName propertyName, System.Object value, System.Object rootElement, Xamarin.Forms.Xaml.INode node, Xamarin.Forms.Xaml.HydratationContext context, System.Xml.IXmlLineInfo lineInfo) [0x000de] in C:\\BuildAgent3\\work\\ca3766cfc22354a1\\Xamarin.Forms.Xaml\\ApplyPropertiesVisitor.cs:310 \r\n  at Xamarin.Forms.Xaml.ApplyPropertiesVisitor.Visit (Xamarin.Forms.Xaml.ValueNode node, Xamarin.Forms.Xaml.INode parentNode) [0x00070] in C:\\BuildAgent3\\work\\ca3766cfc22354a1\\Xamarin.Forms.Xaml\\ApplyPropertiesVisitor.cs:63 \r\n...\r\n<\/pre>\n
\u3053\u3053\u3067\u3001\u3069\u3093\u306a\u65b9\u6cd5\u3067\u63a2\u3057\u3066\u3044\u308b\u306e\u304b\u304c\u4e0d\u660e\uff08\u305f\u3076\u3093\u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\uff1f\uff09\u306a\u306e\u3067\u3001\u3061\u3087\u3063\u3068\u3053\u306e\u5148\u306f\u89e3\u3089\u305a\u3002\u4ed5\u65b9\u304c\u306a\u3044\u304b\u3089 Xamarin.Forms \u306e\u30b3\u30fc\u30c9\u3092\u8aad\u3080\u304b\u3001\u5225\u306a\u5bfe\u7b56\u3092\u7acb\u3066\u308b\u304b\u601d\u6848\u4e2d\u3002<\/p>\n
 <\/p>\n
\u3042\u3063\u305f\u3001<\/p>\n
in ApplyPropertiesVisitor.cs \u3067 XamlParseException \u4f8b\u5916\u3092\u767a\u751f\u3055\u305b\u3066\u3044\u308b\u3002<\/p>\n
\r\n\t\tstatic bool TryConnectEvent(object element, string localName, object value, object rootElement, IXmlLineInfo lineInfo, out Exception exception)\r\n\t\t{\r\n\t\t\texception = null;\r\n\r\n\t\t\tvar elementType = element.GetType();\r\n\t\t\tvar eventInfo = elementType.GetRuntimeEvent(localName);\r\n\t\t\tvar stringValue = value as string;\r\n\r\n\t\t\tif (eventInfo == null || IsNullOrEmpty(stringValue))\r\n\t\t\t\treturn false;\r\n\r\n\t\t\tvar methodInfo = rootElement.GetType().GetRuntimeMethods().FirstOrDefault(mi => mi.Name == (string)value);\r\n\t\t\tif (methodInfo == null) {\r\n\t\t\t\texception = new XamlParseException($&quot;No method {value} found on type {rootElement.GetType()}&quot;, lineInfo);\r\n\t\t\t\treturn false;\r\n\t\t\t}\r\n\r\n\t\t\ttry {\r\n\t\t\t\teventInfo.AddEventHandler(element, methodInfo.CreateDelegate(eventInfo.EventHandlerType, rootElement));\r\n\t\t\t\treturn true;\r\n\t\t\t} catch (ArgumentException ae) {\r\n\t\t\t\texception = new XamlParseException($&quot;Method {stringValue} does not have the correct signature&quot;, lineInfo, ae);\r\n\t\t\t}\r\n\t\t\treturn false;\r\n\t\t}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
Xamarin.Forms \u7528\u306e\u8d85\u8efd\u91cf\u30d7\u30ec\u30d3\u30e5\u30fc\u30a2\u3092\u4f5c\u308b | Moonmile Solutions Blog http:\/\/www.moonmile.net\/blog\/archives\/8669 \u3067\u3001XAML\u306b\u30af\u30ea\u30c3\u30af\u30a4 … \u7d9a\u304d\u3092\u8aad\u3080 →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3,49,62],"tags":[],"class_list":["post-8672","post","type-post","status-publish","format-standard","hentry","category-dev","category-xaml","category-xamarin"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/posts\/8672","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/comments?post=8672"}],"version-history":[{"count":6,"href":"https:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/posts\/8672\/revisions"}],"predecessor-version":[{"id":8678,"href":"https:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/posts\/8672\/revisions\/8678"}],"wp:attachment":[{"href":"https:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/media?parent=8672"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/categories?post=8672"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/tags?post=8672"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}