C#的List分批数据处理

1.直接贴代码块List的扩展

 public static class ListExtension
 {
     /// <summary>
     /// 分页数据
     /// </summary>
     /// <typeparam name="T"></typeparam>
     /// <param name="source">数据源</param>
     /// <param name="batchSize">分页大小</param>
     /// <returns></returns>
     public static IEnumerable<IEnumerable<T>> Batch<T>(this List<T> source, int batchSize)
     {
         if (source == null || batchSize <= 0) yield break;

         for (int i = 0; i < source.Count; i += batchSize)
         {
             int remaining = source.Count - i;
             int currentBatchSize = Math.Min(remaining, batchSize);
             var batch = source.Skip(i).Take(currentBatchSize);
             yield return batch;
         }
     }
 }

2.完整示例

  class Program
  {
      static void Main(string[] args)
      {
          //定义测试数据
          List<MyData> data = new List<MyData>()
          {
             new MyData(){ Index = 0, Name ="张三" },
             new MyData(){ Index = 1, Name ="李四" },
             new MyData(){ Index = 2, Name ="王五" },
             new MyData(){ Index = 3, Name ="赵六" },
          };

          //定义分批数量
          int batchSize = 3;
          //扩展调用
          var lis2 = data.Batch(batchSize);
          foreach (var item in lis2)
          {
              Console.WriteLine(JsonConvert.SerializeObject(item));
          }
      }

      /// <summary>
      /// 测试数据的Data
      /// </summary>
      public class MyData
      {
          public int Index { get; set; }

          public string Name { get; set; }
      }
  }