Shulou(Shulou.com)06/02 Report--

This article mainly explains "how to automatically generate C # class from json string". The explanation in this article is simple and clear and easy to learn and understand. Please follow the editor's train of thought to study and learn "how to automatically generate C # class from json string".

Json converted object

Since. Net 4.0, Microsoft has provided a complete set of solutions for dealing with json. Among them, there is how to convert json strings into C # objects, in fact, this code is clear to many people, we all know, I will not say much, paste the code first.

1. Add reference System.Web.Extensions

2. Test the code

The main entry point of the static class Program {/ program. / / static void Main () {string jsonStr = "{\" name\ ":\" supperlitt\ ",\" age\ ": 25,\" likes\ ": [\" C #\ ",\" asp.net\ "]}"; JavaScriptSerializer js = new JavaScriptSerializer (); var model = js.Deserialize (jsonStr); Console.WriteLine (model.name) Console.WriteLine (model.age); Console.WriteLine (string.Join (",", model.likes)); Console.ReadLine ();} public class TestModel {public string name {get; set;} public int age {get; set;} public List likes {get; set;}

Output:

Reverse thinking

Because in the code, we often encounter the need to deal with json strings (packet grabbing is more frequent). Every time you encounter a json string, you need to parse, do repetitive work, and define a C# object class. Is there a better way to solve it? you don't have to write code every time. How nice it is to generate it automatically.

So LZ thought forward and backward, and thought of a Microsoft class library that had been used before, which should be a Microsoft Com library.

Automatically generate C # classes from json strings

1. Try Baidu for a while, and also try several classes that can be used. So I found it.

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

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

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

2. It is found that this m object is actually a JSObject object, and it can also be subdivided internally, so it has been tested and the source code will be added later. Let's see the results of the test first.

We randomly found a json string on web to deal with it. Of course, json is a little more complicated.

Ps: the code is as follows

Using System; using System.Collections.Generic; using System.Linq; using System.Text; using Microsoft.JScript; namespace Common {/ Json string zhuanh / public class JsonHelper: IHelper {/ whether to add get set / private bool isAddGetSet = false / data collection, temporary / private List dataList = new List (); public JsonHelper () {} public JsonHelper (bool isAddGetSet) {this.isAddGetSet = isAddGetSet } / get the string form of the class / public string GetClassString (string jsonStr) {Microsoft.JScript.Vsa.VsaEngine ve = Microsoft.JScript.Vsa.VsaEngine.CreateEngine (); var m = Microsoft.JScript.Eval.JScriptEvaluate ("(" + jsonStr + ")", ve) Int index = 0; var result = GetDicType ((JSObject) m, ref index); StringBuilder content = new StringBuilder (); foreach (var item in dataList) {content.AppendFormat ("\ tpublic class {0}\ r\ n", item.CLassName); content.AppendLine ("\ t {") Foreach (var model in item.Dic) {if (isAddGetSet) {content.AppendFormat ("\ t\ tpublic {0} {1}", model.Value, model.Key); content.Append ("{get; set;}\ r\ n") } else {content.AppendFormat ("\ t\ tpublic {0} {1};\ r\ n", model.Value, model.Key);} content.AppendLine () } content.AppendLine ("\ t}"); content.AppendLine ();} return content.ToString () } / get the string representation of the type / private string GetTypeString (Type type) {if (type = = typeof (int)) {return "int" } else if (type = = typeof (bool)) {return "bool";} else if (type = = typeof (Int64)) {return "long" } else if (type = = typeof (string)) {return "string";} else if (type = = typeof (List)) {return "List" } else if (type = = typeof (List)) {return "List";} else {return "string" }} / private string GetDicType (JSObject jsObj, ref int index) {AutoClass classInfo = new AutoClass (); var model = ((Microsoft.JScript.JSObject) (jsObj)) .GetMembers (System.Reflection.BindingFlags.GetField) Foreach (Microsoft.JScript.JSField item in model) {string name = item.Name; Type type = item.GetValue (item) .GetType If (type = = typeof (ArrayObject)) {/ / set string typeName = GetDicListType ((ArrayObject) item.GetValue (item), ref index); if (! string.IsNullOrEmpty (typeName)) {classInfo.Dic.Add (name, typeName) }} else if (type = = typeof (JSObject)) {/ / single object string typeName = GetDicType ((JSObject) item.GetValue (item), ref index) If (! string.IsNullOrEmpty (typeName)) {classInfo.Dic.Add (name, typeName);}} else {classInfo.Dic.Add (name, GetTypeString (type)) }} index++; classInfo.CLassName = "Class" + index; dataList.Add (classInfo); return classInfo.CLassName } / read collection type / private string GetDicListType (ArrayObject jsArray, ref int index) {string name = string.Empty If ((int) jsArray.length > 0) {var item = jsArray [0]; var type = item.GetType (); if (type = = typeof (JSObject)) {name = "List" } else {name = "List";}} return name;}} public class AutoClass {public string CLassName {get; set;} private Dictionary dic = new Dictionary () Public Dictionary Dic {get {return this.dic;} set {this.dic = value;}

Call method:

JsonHelper helper = new JsonHelper (true)

Try

{

This.txtOutPut.Text = helper.GetClassString ("json string")

}

Catch

{

This.txtOutPut.Text = "the input does not conform to the specification."

}

Thank you for reading, the above is the content of "how to automatically generate C # class from json string". After the study of this article, I believe you have a deeper understanding of how to automatically generate C # class from json string, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.