System.NotSupportedException:“No data is available for encoding 1252. For information on defining a custom encoding

最近搞 .net项目，Dapper连接Mysql时，运行报错：

System.NotSupportedException:“No data is available for encoding 1252. For information on defining a custom encoding, see the documentation for the Encoding.RegisterProvider method.”

解决办法：

新建项目，选择Visual C#   ->    .Net Core    ->    控制台应用（.Net Core）

数据库语句：

CREATE TABLE `city` (
  `ID` int(11) NOT NULL AUTO_INCREMENT,
  `Name` char(35) NOT NULL DEFAULT '',
  `CountryCode` char(3) NOT NULL DEFAULT '',
  `District` char(20) NOT NULL DEFAULT '',
  `Population` int(11) NOT NULL DEFAULT '0',
  PRIMARY KEY (`ID`),
  KEY `CountryCode` (`CountryCode`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=latin1;

测试代码：

 using System;
 using MySql.Data.MySqlClient;
 using Dapper;
 using System.Collections.Generic;
 using System.Linq;

 namespace ConsoleApp1
 {

     public class CityEntity
     {
         public int ID { get; set; }
         public string Name { get; set; }
         public string CountryCode { get; set; }
         public string District { get; set; }
         public int Population { get; set; }

         public override string ToString()
         {
             return $"ID: {ID}, Name: {Name}, CountryCode: {CountryCode}, District: {District}, Population: {Population}";
         }
     }
     public class CityRepository
     {
         public List<CityEntity> Get10Cities()
         {
             List<CityEntity> result;
             using (var conn = new MySqlConnection("Host=172.16.1.197;Port=3306;Database=mars_xusinan;Uid=root;pwd=123456"))
             {
                 var sql = "SELECT * FROM city";
                 result = conn.Query<CityEntity>(sql).ToList();
             }

             return result;
         }
     }
     class Program
     {
         static void Main(string[] args)
         {
             var repository = new CityRepository();
             var cities = repository.Get10Cities();
             cities.ForEach(e =>
             {
                 System.Console.WriteLine(e);
             });
         }
     }
 }

添加引用：用NuGet得到包

Dapper

MySql.Data

安装完后，报错自然消失，大功告成，搞了2天，坚持不放弃。