chore: initial commit

Interface_WebAPI/DatabaseClient/DBClient.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DatabaseClient
+{
+    public abstract class DBClient
+    {
+        /// <summary>
+        /// 根据连接字符串连接
+        /// </summary>
+        /// <param name="connString">连接字符串</param>
+        public abstract void Connect(string connString);
+
+        /// <summary>
+        /// 执行sql查询语句，返回DataTable
+        /// </summary>
+        /// <param name="sql">查询sql字符串</param>
+        /// <returns></returns>
+        public abstract DataTable ExecQuery(string sql);
+
+        /// <summary>
+        /// 执行sql非查询语句，返回执行结果
+        /// </summary>
+        /// <param name="sql">非查询sql字符串</param>
+        /// <returns></returns>
+        public abstract int ExecNonQuery(string sql);
+
+        /// <summary>
+        /// 分页，将原始表分成子表。约束为当前页数和每页记录数
+        /// </summary>
+        /// <typeparam name="T">泛型类型</typeparam>
+        /// <param name="originList">原始表</param>
+        /// <param name="pageSize">每页记录数</param>
+        /// <param name="currentPage">当前页数</param>
+        /// <returns></returns>
+        public static List<T> SplitePage<T>(List<T> originList,int pageSize,int currentPage)
+        {
+            List<T> resList = new List<T>();
+
+            var numAll = originList.Count;
+            var numPage = numAll / pageSize + 1;
+
+            var start = (currentPage - 1) * pageSize;
+            var end = start + pageSize;
+
+            for (int i = 0; i < originList.Count; i++)
+            {
+                var origin = originList[i];
+                if (i >= start && i < end)
+                {
+                    resList.Add(origin);
+                }
+            }
+
+            return resList;
+        }
+    }
+}