We also talk about C # Json, from Json strings to class code,

We also talk about C # Json, from Json strings to class code,
Reading directory

 

　　

Json conversion object

Since. net 4.0, Microsoft has provided a complete set of solutions for json processing. Here, there is how to convert a json string into a class C # object. In fact, many people know this code and everyone knows it. I will not say much about it, but post the code first.

1. Add reference System. Web. Extensions

2. Test the code.

1 static class Program 2 {3 /// <summary> 4 // main entry point of the Program. 5 // </summary> 6 static void Main () 7 {8 string jsonStr = "{\" name \ ": \" supperlitt \ ", \" age \": 25, \ "likes \": [\ "C # \", \ "asp.net \"]} "; 9 JavaScriptSerializer js = new JavaScriptSerializer (); 10 var model = js. deserialize <TestModel> (jsonStr); 11 12 Console. writeLine (model. name); 13 Console. writeLine (model. age); 14 Console. writeLine (string. join (",", model. likes); 15 16 Console. readLine (); 17} 18 19 public class TestModel20 {21 public string name {get; set;} 22 23 public int age {get; set ;} 24 25 public List <string> likes {get; set;} 26} 27}

Output content:

 

Reverse Thinking

In the code, json Strings need to be processed frequently ). Every time you encounter a json string, most of them need to be parsed and repeat, and you need to define a C # object class. Is there a good solution? You don't have to write code every time. Automatic Generation...

So LZ thought forward and backward, and thought of a Microsoft class library that was previously used, it should be a Com library of Microsoft.

 

Automatically generate C # class from json string

1. I tried Baidu and tried several available classes. So I found

The following code parses a json string and becomes a C # object.

The Microsoft. JScript. dll class library is referenced here.

1 Microsoft.JScript.Vsa.VsaEngine ve = Microsoft.JScript.Vsa.VsaEngine.CreateEngine();2 var m = Microsoft.JScript.Eval.JScriptEvaluate("(" + jsonStr + ")", ve);

2. The m object is actually a JSObject object, which can be further subdivided internally. Therefore, we tested various types of objects and will discuss the source code later. Let's take a look at the test results first.

We randomly find a json string on the web for processing. Of course, json is a little more complicated.

Ps: the code is as follows:

1 using System; 2 using System. collections. generic; 3 using System. linq; 4 using System. text; 5 using Microsoft. JScript; 6 7 namespace Common 8 {9 /// <summary> 10 // Json string zhuanh 11 /// </summary> 12 public class JsonHelper: IHelper 13 {14 /// <summary> 15 /// do you want to add get set 16 /// </summary> 17 private bool isAddGetSet = false; 18 19 /// <summary> 20 // data set, temporary 21 /// </summary> 22 private Lis T <AutoClass> dataList = new List <AutoClass> (); 23 24 public JsonHelper () 25 {26} 27 28 public JsonHelper (bool isAddGetSet) 29 {30 this. isAddGetSet = isAddGetSet; 31} 32 33 // <summary> 34 // obtain the string format of the class 35 /// </summary> 36 /// <param name = "jsonStr"> </param> 37 // <returns> </returns> 38 public string GetClassString (string jsonStr) 39 {40 Microsoft. JScript. vsa. vsaEngine ve = Microsoft. JScript. Vsa. vsaEngine. createEngine (); 41 var m = Microsoft. JScript. eval. JScriptEvaluate ("(" + jsonStr + ")", ve); 42 43 int index = 0; 44 var result = GetDicType (JSObject) m, ref index ); 45 46 StringBuilder content = new StringBuilder (); 47 foreach (var item in dataList) 48 {49 content. appendFormat ("\ tpublic class {0} \ r \ n", item. CLassName); 50 content. appendLine ("\ t {"); 51 foreach (var model in item. dic) 52 {53 if (isAddGetSet) 54 {55 content. appendFormat ("\ t \ tpublic {0} {1}", model. value, model. key); 56 content. append ("{get; set ;}\ r \ n"); 57} 58 else 59 {60 content. appendFormat ("\ t \ tpublic {0} {1}; \ r \ n", model. value, model. key); 61} 62 63 content. appendLine (); 64} 65 66 content. appendLine ("\ t}"); 67 content. appendLine (); 68} 69 70 return content. toString (); 71} 72 73 // <summary> 74 /// Obtain the type of string to 75 /// </summary> 76 // <param name = "type"> </param> 77 // <returns> </returns> 78 private string GetTypeString (Type type) 79 {80 if (type = typeof (int) 81 {82 return "int"; 83} 84 else if (type = typeof (bool )) 85 {86 return "bool"; 87} 88 else if (type = typeof (Int64) 89 {90 return "long "; 91} 92 else if (type = typeof (string) 93 {94 return "string"; 95} 96 else if (Type = typeof (List <string>) 97 {98 return "List <string>"; 99} 100 else if (type = typeof (List <int> )) 101 {102 return "List <int>"; 103} 104 else105 {106 return "string "; 107} 108} 109 110 // <summary> 111 // obtain the dictionary type 112 // </summary> 113 // <returns> </returns> 114 private string GetDicType (JSObject jsObj, ref int index) 115 {116 AutoClass classInfo = new AutoClass (); 117 118 var model = (Microsoft. JScript. JSObject) (jsObj )). getMembers (System. reflection. bindingFlags. getField); 119 foreach (Microsoft. JScript. JSField item in model) 120 {121 string name = item. name; 122 Type type = item. getValue (item ). getType (); 123 if (type = typeof (ArrayObject) 124 {125 // set 126 string typeName = GetDicListType (ArrayObject) item. getValue (item), ref index); 127 if (! String. isNullOrEmpty (typeName) 128 {129 classInfo. dic. add (name, typeName); 130} 131} 132 else if (type = typeof (JSObject) 133 {134 // single object 135 string typeName = GetDicType (JSObject) item. getValue (item), ref index); 136 if (! String. isNullOrEmpty (typeName) 137 {138 classInfo. dic. add (name, typeName); 139} 140} 141 else142 {143 classInfo. dic. add (name, GetTypeString (type); 144} 145} 146 147 index ++; 148 classInfo. CLassName = "Class" + index; 149 dataList. add (classInfo); 150 return classInfo. CLassName; 151} 152 153 // <summary> 154 // read the set type 155 // </summary> 156 // <param name = "jsArray"> </param> 157 // <param name = "index"> </param> 158 // <returns> </returns> 159 private string GetDicListType (ArrayObject jsArray, ref int index) 160 {161 string name = string. empty; 162 if (int) jsArray. length> 0) 163 {164 var item = jsArray [0]; 165 var type = item. getType (); 166 if (type = typeof (JSObject) 167 {168 name = "List <" + GetDicType (JSObject) item, ref index) + "> "; 169} 170 else171 {172 name = "List <" + GetTypeString (type) + ">"; 173} 174} 175 176 return name; 177} 178} 179 180 182 public class AutoClass181 {183 public string CLassName {get; set;} 184 private Dictionary <string, string> dic = new Dictionary <string, string> (); 185 186 public Dictionary <string, string> Dic187 {188 get189 {190 return this. dic; 191} 192 set193 {194 this. dic = value; 195} 196} 197} 198}View Code

Call method:

1 JsonHelper helper = new JsonHelper (true); 2 try3 {4 this.txt OutPut. text = helper. getClassString ("json string"); 5} 6 catch7 {8 this.txt OutPut. text = "the input content does not comply with the specifications... "; 9}

 

Finally, if dudu permits it, I will attach another test address: http://www.51debug.com/tool/JsonToCharpCode.aspx.

 

I wrote my blog several times, but I wrote a lot about it every time and it looked uncomfortable. I wrote it with my heart. You are welcome to make a brick or provide better suggestions.