c# Json List<T> DataTable 数据相互转换

List<T>转Json

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public static string Obj2Json<T>(T data) {     try     {         System.Runtime.Serialization.Json.DataContractJsonSerializer serializer = new System.Runtime.Serialization.Json.DataContractJsonSerializer(data.GetType());         using (MemoryStream ms = new MemoryStream())         {             serializer.WriteObject(ms, data);             return Encoding.UTF8.GetString(ms.ToArray());         }     }     catch     {         return null;     } }

Json转List<T>

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public static Object Json2Obj(String json,Type t) {     try     {         System.Runtime.Serialization.Json.DataContractJsonSerializer serializer = new System.Runtime.Serialization.Json.DataContractJsonSerializer(t);         using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(json)))         {                          return  serializer.ReadObject(ms);         }     }     catch     {         return null;     } }

 

DataTable 转Json

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public static string DataTable2Json(DataTable dt) {     if (dt.Rows.Count == 0)     {         return "";     }       StringBuilder jsonBuilder = new StringBuilder();     // jsonBuilder.Append("{");     //jsonBuilder.Append(dt.TableName.ToString());      jsonBuilder.Append("[");//转换成多个model的形式     for (int i = 0; i < dt.Rows.Count; i++)     {         jsonBuilder.Append("{");         for (int j = 0; j < dt.Columns.Count; j++)         {             jsonBuilder.Append("\"");             jsonBuilder.Append(dt.Columns[j].ColumnName);             jsonBuilder.Append("\":\"");             jsonBuilder.Append(dt.Rows[i][j].ToString());             jsonBuilder.Append("\",");         }         jsonBuilder.Remove(jsonBuilder.Length - 1, 1);         jsonBuilder.Append("},");     }     jsonBuilder.Remove(jsonBuilder.Length - 1, 1);     jsonBuilder.Append("]");     //  jsonBuilder.Append("}");     return jsonBuilder.ToString(); }

单个对象转JSON

 

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public static T Json2Obj<T>(string json) {     T obj = Activator.CreateInstance<T>();     using (System.IO.MemoryStream ms = new System.IO.MemoryStream(System.Text.Encoding.UTF8.GetBytes(json)))     {         System.Runtime.Serialization.Json.DataContractJsonSerializer serializer = new System.Runtime.Serialization.Json.DataContractJsonSerializer(obj.GetType());         return (T)serializer.ReadObject(ms);     } }

转：http://www.cnblogs.com/mrliuc/archive/2011/01/13/1934787.html