V1.2 新构架

2026-10-21 09:02:26 +08:00 · 2021-02-20 16:45:44 +08:00
parent c2d95a1833
commit 4d76decf73
343 changed files with 41333 additions and 4 deletions
@@ -0,0 +1,64 @@
+using SQLite;
+using System.Application.Models;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+
+namespace System
+{
+    public static class AsyncTableQueryExtensions
+    {
+        #region WhereOr
+
+        /// <inheritdoc cref="QueryableExtensions.WhereOr{T}(IReadOnlyList{Expression{Func{T, bool}}})"/>
+        public static AsyncTableQuery<T> WhereOr<T>(this AsyncTableQuery<T> source, IReadOnlyList<Expression<Func<T, bool>>> predicates) where T : new()
+        {
+            var predicate = ExpressionHelper.WhereOr(predicates);
+            return source.Where(predicate);
+        }
+
+        /// <inheritdoc cref="QueryableExtensions.WhereOr{T}(IReadOnlyList{Expression{Func{T, bool}}})"/>
+        public static AsyncTableQuery<T> WhereOr<T>(this AsyncTableQuery<T> source, IEnumerable<Expression<Func<T, bool>>> predicates) where T : new()
+            => source.WhereOr(predicates.ToArray());
+
+        /// <inheritdoc cref="QueryableExtensions.WhereOr{T}(IReadOnlyList{Expression{Func{T, bool}}})"/>
+        public static AsyncTableQuery<T> WhereOr<T>(this AsyncTableQuery<T> source, params Expression<Func<T, bool>>[] predicates) where T : new()
+        {
+            IReadOnlyList<Expression<Func<T, bool>>> _predicates = predicates;
+            return source.WhereOr(_predicates);
+        }
+
+        #endregion
+
+        #region Paging
+
+        /// <summary>
+        /// 分页查询，调用此方法前必须进行排序
+        /// </summary>
+        /// <typeparam name="TEntity"></typeparam>
+        /// <param name="source"></param>
+        /// <param name="current"></param>
+        /// <param name="pageSize"></param>
+        /// <returns></returns>
+        public static async Task<PagedModel<TEntity>> PagingAsync<TEntity>(
+            this AsyncTableQuery<TEntity> source,
+            int current = IPagedModel.DefaultCurrent,
+            int pageSize = IPagedModel.DefaultPageSize) where TEntity : new()
+        {
+            var skipCount = (pageSize - 1) * pageSize;
+            var total = await source.CountAsync();
+            var dataSource = await source.Skip(skipCount).Take(pageSize).ToListAsync();
+            var pagedModel = new PagedModel<TEntity>
+            {
+                Current = current,
+                PageSize = pageSize,
+                Total = total,
+                DataSource = dataSource,
+            };
+            return pagedModel;
+        }
+
+        #endregion
+    }
+}