1 using System; 2 using System.Collections; 3 using System.Reflection; 4 using System.Text; 5 6 namespace JSON 7 { 8 /// <summary> 9 /// 模型转为JSON 10 /// </summary> 11 public static class ModelToJsonEx 12 { 13 #region 基础转换 14 /// <summary> 15 /// 对象转换为Json 16 /// </summary> 17 /// <param name="obj">对象实例</param> 18 /// <returns>Json字符串</returns> 19 public static string MToJson(this Object obj) 20 { 21 switch (obj) 22 { 23 case Guid guid: 24 return $"\"{guid.ToString()}\""; 25 case IList list: 26 return MIListToJson(list, null); 27 default: 28 return MObjectToJson(obj, null); 29 } 30 } 31 /// <summary> 32 /// 对象转换为Json 33 /// </summary> 34 /// <param name="obj">对象实例</param> 35 /// <param name="ignores">忽略输出的属性(不区分大小写)</param> 36 /// <returns>Json字符串</returns> 37 public static string MToJson(this Object obj, params string[] ignores) 38 { 39 switch (obj) 40 { 41 //TODO:特殊类型转换添加到此处 42 case Guid value: 43 return $"\"{value.ToString()}\""; 44 case IList value: 45 return MIListToJson(value, ignores); 46 case IDictionary value: 47 return MIDictionaryToJson(value, ignores); 48 case Object value: 49 return MObjectToJson(obj, ignores); 50 default: 51 throw new NotImplementedException("无法识别对象!"); 52 } 53 } 54 /// <summary> 55 /// 组类型转换为Json 56 /// </summary> 57 /// <param name="list">组类型</param> 58 /// <param name="ignores">忽略输出的属性</param> 59 /// <returns>Json字符串</returns> 60 public static string MIListToJson(this IList list, params string[] ignores) 61 { 62 StringBuilder builder = new StringBuilder("["); 63 //转换值为json字符串 64 foreach (var value in list) builder.Append(MValueToJson(value, ignores) + ','); 65 //有内容时去除多余间隔符 66 if (list.Count > 0) 67 { 68 //去除多余间隔符 69 builder.Remove(builder.Length - 1, 1); 70 } 71 //添加结尾符 72 builder.Append("]"); 73 return builder.ToString(); 74 } 75 /// <summary> 76 /// 字典类型转换为Json字符串 77 /// </summary> 78 /// <param name="dictionary"></param> 79 /// <param name="ignores"></param> 80 /// <returns>Json字符串</returns> 81 public static string MIDictionaryToJson(this IDictionary dictionary, params string[] ignores) 82 { 83 StringBuilder builder = new StringBuilder("["); 84 foreach (var key in dictionary.Keys) 85 { 86 var value = dictionary[key]; 87 //外边界 88 builder.Append("["); 89 //转换key 90 builder.Append(MValueToJson(key, ignores)); 91 //分隔 92 builder.Append(","); 93 //转换value 94 builder.Append(MValueToJson(value, ignores)); 95 //尾边界 96 builder.Append("],"); 97 } 98 //有内容时去除多余间隔符 99 if (dictionary.Count > 0) 100 { 101 //去除多余间隔符 102 builder.Remove(builder.Length - 1, 1); 103 } 104 builder.Append("]"); 105 return builder.ToString(); 106 } 107 /// <summary> 108 /// 对象转换为Json 109 /// </summary> 110 /// <param name="obj">对象实例</param> 111 /// <param name="ignores">忽略输出的属性</param> 112 /// <returns>Json字符串</returns> 113 public static string MObjectToJson(this Object obj, params string[] ignores) 114 { 115 PropertyInfo[] properties = obj.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public); 116 StringBuilder builder = new StringBuilder("{"); 117 118 foreach (var property in properties) 119 { 120 if (null != ignores && ignores.Length > 0 && ignores.Any(g => g.ToLower() == property.Name.ToLower())) 121 { 122 continue; 123 } 124 else 125 { 126 //此属性json表示字符 127 string str_property = string.Empty; 128 //属性名称格式 129 str_property = $"\"{property.Name}\":"; 130 //获取此属性值 131 Object value = property.GetValue(obj); 132 //添加此属性值 133 str_property += MValueToJson(value, ignores); 134 //是否添加间隔符 135 builder.Append(str_property + ','); 136 } 137 } 138 //有内容时去除多余间隔符 139 if (properties.Length > 0) 140 { 141 //去除多余间隔符 142 builder.Remove(builder.Length - 1, 1); 143 } 144 //添加结尾 145 builder.Append("}"); 146 return builder.ToString(); 147 } 148 /// <summary> 149 /// 转换值为Json字符串 150 /// </summary> 151 /// <param name="value">值</param> 152 /// <param name="ignores">忽略字段</param> 153 /// <returns></returns> 154 public static string MValueToJson(this object value, params string[] ignores) 155 { 156 string str_property = string.Empty; 157 //获取此属性类型标识 158 TypeCode code = Convert.GetTypeCode(value); 159 switch (code) 160 { 161 case TypeCode.Empty: 162 str_property += "null"; 163 break; 164 case TypeCode.Object: 165 str_property += MToJson(value, ignores); 166 break; 167 case TypeCode.Boolean: 168 str_property += value.ToString().ToLower(); 169 break; 170 case TypeCode.SByte: 171 case TypeCode.Byte: 172 case TypeCode.Int16: 173 case TypeCode.UInt16: 174 case TypeCode.Int32: 175 case TypeCode.UInt32: 176 case TypeCode.Int64: 177 case TypeCode.UInt64: 178 case TypeCode.Single: 179 case TypeCode.Double: 180 case TypeCode.Decimal: 181 str_property += value; 182 break; 183 case TypeCode.Char: 184 str_property += $"\"{(((Char)value != Char.MinValue) ? value : string.Empty)}\""; 185 break; 186 case TypeCode.String: 187 str_property += $"\"{(((String)value != String.Empty) ? value : string.Empty)}\""; 188 break; 189 case TypeCode.DateTime: 190 str_property += $"\"{Convert.ToDateTime(value).ToString("yyyy-MM-dd HH:mm:ss")}\""; 191 break; 192 case TypeCode.DBNull: 193 default: 194 throw new NotImplementedException("无法识别对象!"); 195 } 196 return str_property; 197 } 198 /// <summary> 199 /// 查看数组是否包含此字段 200 /// </summary> 201 /// <typeparam name="T">数组类型</typeparam> 202 /// <param name="arr">数组实例</param> 203 /// <param name="any">比较方法</param> 204 /// <returns></returns> 205 public static bool Any<T>(this T[] arr, Any<T, bool> any) 206 { 207 foreach (var obj in arr) if (any(obj)) return true; 208 209 return false; 210 } 211 #endregion 212 } 213 /// <summary> 214 /// 自定义拉姆达表达式 215 /// </summary> 216 /// <typeparam name="T"></typeparam> 217 /// <typeparam name="T1"></typeparam> 218 /// <param name="t"></param> 219 /// <returns></returns> 220 public delegate T1 Any<in T, out T1>(T t); 221 }
Object转Json 源码
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转载自www.cnblogs.com/Jzs001/p/13195247.html
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