Add db.Utilities.PageEach

Src/Asp.Net/SqlSugar/Infrastructure/ContextMethods.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections;
 using System.Collections.Generic;
 using System.Data;
 using System.Dynamic;
@@ -460,7 +461,8 @@ namespace SqlSugar
                             {
                                 builder.AppendFormat(" ( ");
 
-                            }else if (isFirst)
+                            }
+                            else if (isFirst)
                             {
                                 builder.AppendFormat(" {0} ( ", con.Key.ToString().ToUpper());
                             }
@@ -497,5 +499,21 @@ namespace SqlSugar
                 return item.FieldValue;
         }
         #endregion
+
+        #region
+        public void PageEach<T>(IEnumerable<T> pageItems,int pageSize, Action<List<T>> action)
+        {
+            if (pageItems != null&& pageItems.Any())
+            {
+                int totalRecord = pageItems.Count();
+                int pageCount = (totalRecord + pageSize - 1) / pageSize;
+                for (int i = 1; i <= pageCount; i++)
+                {
+                    var list = pageItems.Skip((i - 1) * pageSize).Take(pageSize).ToList();
+                    action(list);
+                }
+            }
+        }
+        #endregion
     }
 }

Src/Asp.Net/SqlSugar/Interface/IContextMethods.cs

@@ -25,6 +25,7 @@ namespace SqlSugar
         void RemoveCacheAll<T>();
         void RemoveCache<T>(string key);
         KeyValuePair<string, SugarParameter[]> ConditionalModelToSql(List<IConditionalModel> models,int beginIndex=0);
+        void PageEach<T>(IEnumerable<T> pageItems, int pageSize, Action<List<T>> action);
 
     }
 }