泛型List集合转化为DateTable

 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;

 namespace coDEalers
 {
     public static class Extension
     {
         public static DataTable ListToDataTable<T>(this IList<T> data, string tableName)
         {
             DataTable table = new DataTable(tableName);

             //special handling for value types and string
             if (typeof(T).IsValueType || typeof(T).Equals(typeof(string)))
             {

                 DataColumn dc = new DataColumn("Value");
                 table.Columns.Add(dc);
                 foreach (T item in data)
                 {
                     DataRow dr = table.NewRow();
                     dr[] = item;
                     table.Rows.Add(dr);
                 }
             }
             else
             {
                 PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(typeof(T));
                 foreach (PropertyDescriptor prop in properties)
                 {
                     table.Columns.Add(prop.Name,
                     Nullable.GetUnderlyingType(prop.PropertyType) ?? prop.PropertyType);
                 }
                 foreach (T item in data)
                 {
                     DataRow row = table.NewRow();
                     foreach (PropertyDescriptor prop in properties)
                     {
                         try
                         {
                             row[prop.Name] = prop.GetValue(item) ?? DBNull.Value;
                         }
                         catch (Exception ex)
                         {
                             row[prop.Name] = DBNull.Value;
                         }
                     }
                     table.Rows.Add(row);
                 }
             }
             return table;
         }
     }
 }

上面的是方法，下面是调用的方法

DataTable dt = null;
List<StateList> stateListObj = JsonConvert.DeserializeObject<List<StateList>>(hdn_stateDetails_JSON.Value);
dt = stateListObj.ListToDataTable<StateList>("dtState");

这是个通用的方法，只要将需要转换的集合传进来就行了