【C#方法】將對象執行個體轉化為JSON字串

標籤：

第一、開發原因：

要做一個前台顯示伺服器檔案的網頁，想用JS控制項做，資料格式使用JSON。所以就寫將某目錄轉化成JSON字串，但是突然覺得拼湊太囉嗦，而且定製化太高，不靈活，所以索性就寫將C#中的DirectoryInfo執行個體遞迴下去找到所有子檔案夾和檔案，然後輸出成JSON字串。

緊接著，發現很多C#資料模型都是一樣的結構，比如SHarepoint中的網站和子網站，每個網站有列表或文件庫。那何不擴充一下呢。

第二、基本原理：

使用Type.InvokeMember()執行執行個體的方法和取得屬性。

string path = @"E:\Work\test";DirectoryInfo folder = new DirectoryInfo(path);Type type = foldera.GetType();FileInfo[] files = (FileInfo[])type.InvokeMember("GetFiles", BindingFlags.Default | BindingFlags.InvokeMethod, null, folder, new object[] { });

String Name = (String)type.InvokeMember("Name", BindingFlags.Default | BindingFlags.GetProperty, null, folder, new object[] { });

第三、全部代碼：

using System;using System.Collections.Generic;using System.Text;using System.IO;using System.Reflection;namespace GetFolderJsonData{    class Program    {        public static string[] ZIJINames = new string[] { "Folder" };        public static string[] FUSHUNames = new string[] { "Files" };        public static string[] ZIJIMethods = new string[] { "GetDirectories" };        public static string[] FUSHUMethods = new string[] { "GetFiles" };        public static string[] ZIJIFields = new string[] { "Name" };        public static string[] FUSHUFields = new string[] { "Name", "Extension" };        public static string resultJson = "";        static void Main(string[] args)        {            string path = @"E:\Work_28528033\test";            DirectoryInfo foldera = new DirectoryInfo(path);            string dd = "GetFiles";            Type type = foldera.GetType();            FileInfo[] files = (FileInfo[])type.InvokeMember(dd, BindingFlags.Default | BindingFlags.InvokeMethod, null, foldera, new object[] { });            resultJson += "{";            GetJsonDataFromObject(foldera);            resultJson += "}";            Write();        }        public static void Write()        {            FileStream fs = new FileStream(@"E:\Work_28528033\result.txt", FileMode.Create);            //獲得位元組數組            byte[] data = System.Text.Encoding.Default.GetBytes(resultJson);            //開始寫入            fs.Write(data, 0, data.Length);            //清空緩衝區、關閉流            fs.Flush();            fs.Close();        }                //public static string GetJsonData(string path)        //{        //    string resultJson="[{";        //    DirectoryInfo folder = new DirectoryInfo(path);        //    if (folder.GetDirectories().Length > 0)        //    {        //        resultJson += "Folder:";        //        foreach (DirectoryInfo f in folder.GetDirectories())        //        {        //            resultJson += "";        //            GetJsonData(folder.FullName);        //        }        //        resultJson += "";        //    }        //    if (folder.GetFiles().Length>0)        //    {        //        resultJson += "";        //        foreach (FileInfo file in folder.GetFiles())        //        {        //            resultJson += "";        //        }        //        resultJson += "";        //    }        //    return resultJson += "}]";        //}                public static string GetJsonDataFromObject(object folder)         {            Type type = folder.GetType();            int diguiInt = -1;            foreach (string ZIJIMethodsItem in ZIJIMethods)            {                diguiInt++;                object[] folders = (object[])type.InvokeMember(ZIJIMethodsItem, BindingFlags.Default | BindingFlags.InvokeMethod, null, folder, new object[] { });                if (folders.Length>0)                {                    resultJson += ZIJINames[diguiInt] + ":[";                    foreach (object dir in folders)                    {                        resultJson += "{";                        Type diguiType = dir.GetType();                        foreach (string ZIJINamesItem in ZIJIFields)                        {                            resultJson += ZIJINamesItem+":\"";                            resultJson += diguiType.InvokeMember(ZIJINamesItem, BindingFlags.Default | BindingFlags.GetProperty, null, dir, new object[] { }).ToString()+"\",";                        }                        GetJsonDataFromObject(dir);                        resultJson += "},";                    }                    resultJson = resultJson.Substring(0, resultJson.Length - 1);                    resultJson += "],";                }            }            int FUSHUMethodsInt = -1;            foreach (string FUSHUMethodsItem in FUSHUMethods)            {                FUSHUMethodsInt++;                object[] files = (object[])type.InvokeMember(FUSHUMethodsItem, BindingFlags.Default | BindingFlags.InvokeMethod, null, folder, new object[] { });                if (files.Length>0)                {                    resultJson +=FUSHUNames[FUSHUMethodsInt] + ":[";                    foreach (object fileItem in files)                    {                        resultJson += "{";                        Type proType = fileItem.GetType();                        foreach (string FUSHUFieldsItem in FUSHUFields)                        {                            resultJson += FUSHUFieldsItem + ":\"";                            resultJson += proType.InvokeMember(FUSHUFieldsItem, BindingFlags.Default | BindingFlags.GetProperty, null, fileItem, new object[] { }).ToString() + "\",";                        }                        resultJson = resultJson.Substring(0, resultJson.Length - 1);                        resultJson += "},";                    }                    resultJson = resultJson.Substring(0, resultJson.Length - 1);                    resultJson += "]";                }            }            return resultJson;        }    }}

 

結束語：

http://www.bejson.com/  JSON格式化工具（隨便搜了一個，不一定是最好的）

使用：

ZIJI代表與與傳入類型相同。

FUSHU代表這種類型執行個體包含的另外一種類型的執行個體。

Field是欄位。

Name是顯示在JSON中的名字。Name與Method相對應。

如果還是看不懂那太正常了，自己做一個檔案夾試試吧。

附上測試檔案夾，工程代碼，得到結果：

{    Folder: [        {            Name: "1.1F",            Folder: [                {                    Name: "1.1.1F",                    Files: [                        {                            Name: "1.1.1.1 (1).txt",                            Extension: ".txt"                        },                        {                            Name: "1.1.1.1 (2).txt",                            Extension: ".txt"                        },                        {                            Name: "1.1.1.1.txt",                            Extension: ".txt"                        }                    ]                }            ],            Files: [                {                    Name: "1.1.1.txt",                    Extension: ".txt"                },                {                    Name: "1.1.2.txt",                    Extension: ".txt"                },                {                    Name: "1.1.3.txt",                    Extension: ".txt"                }            ]        },        {            Name: "1.2F",            Files: [                {                    Name: "1.2.1.txt",                    Extension: ".txt"                },                {                    Name: "1.2.2.txt",                    Extension: ".txt"                },                {                    Name: "1.2.3.txt",                    Extension: ".txt"                }            ]        }    ],    Files: [        {            Name: "1.1.txt",            Extension: ".txt"        },        {            Name: "1.2.txt",            Extension: ".txt"        },        {            Name: "1.3.txt",            Extension: ".txt"        }    ]}

http://files.cnblogs.com/files/yixiaozi/GetFolderJsonData.rar

http://files.cnblogs.com/files/yixiaozi/GetFolderJsonDatatestFolder.rar

 

【C#方法】將對象執行個體轉化為JSON字串