补全Batch扩展

Admin.NET/Admin.NET.Core/Utils/EnumerableExtensions.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Admin.NET.Core.Utils;
+public static class EnumerableExtensions
+{
+    /// <summary>
+    /// 将集合分批次处理
+    /// </summary>
+    public static IEnumerable<IEnumerable<T>> Batch<T>(this IEnumerable<T> source, int batchSize)
+    {
+        var batch = new List<T>(batchSize);
+        foreach (var item in source)
+        {
+            batch.Add(item);
+            if (batch.Count == batchSize)
+            {
+                yield return batch;
+                batch = new List<T>(batchSize);
+            }
+        }
+        if (batch.Count > 0)
+            yield return batch;
+    }
+}