基线 SVN r240

SVN-Revision: r240

插件库/Lskj.Update/SQLUtil.cs

@@ -0,0 +1,112 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Data.SqlClient;
+using System.Data;
+
+namespace Lskj.Update
+{
+    /// <summary>
+    /// SQLServer连接操作类.
+    /// </summary>
+    public class SQLUtil
+    {
+        public static string mConnStr;
+
+        public static string GetSqlConnectionString()
+        {
+            return mConnStr;
+        }
+        /// <summary>
+        /// <para>说明：适合增删改操作，返回影响条数</para>
+        /// <para>创建人：龚宇超</para>
+        /// <para>创建日期：2019-08-30 </para>
+        /// <para>修改人：</para>
+        /// <para>修改日期：</para>
+        /// <para>修改备注：</para>
+        /// <para>版本：1.0</para>
+        /// </summary>
+        /// <param name="sql">The SQL.</param>
+        /// <param name="parameters">The parameters.</param>
+        /// <returns>System.Int32.</returns>
+        public static int ExecuteNonQuery(string sql, params SqlParameter[] parameters)
+        {
+            using (SqlConnection conn = new SqlConnection(GetSqlConnectionString()))
+            {
+                using (SqlCommand comm = conn.CreateCommand())
+                {
+                    conn.Open();
+                    comm.CommandText = sql;
+                    comm.Parameters.AddRange(parameters);
+                    return comm.ExecuteNonQuery();
+                }
+            }
+        }
+        /// <summary>
+        /// <para>说明：查询操作，返回查询结果中的第一行第一列的值</para>
+        /// <para>创建人：龚宇超</para>
+        /// <para>创建日期：2019-08-30 </para>
+        /// <para>修改人：</para>
+        /// <para>修改日期：</para>
+        /// <para>修改备注：</para>
+        /// <para>版本：1.0</para>
+        /// </summary>
+        /// <param name="sql">The SQL.</param>
+        /// <param name="parameters">The parameters.</param>
+        /// <returns>System.Object.</returns>
+        public static object ExecuteScalar(string sql, params SqlParameter[] parameters)
+        {
+            using (SqlConnection conn = new SqlConnection(GetSqlConnectionString()))
+            {
+                using (SqlCommand comm = conn.CreateCommand())
+                {
+                    conn.Open();
+                    comm.CommandText = sql;
+                    comm.Parameters.AddRange(parameters);
+                    return comm.ExecuteScalar();
+                }
+            }
+        }
+        /// <summary>
+        /// <para>说明：Adapter调整，查询操作，返回DataTable</para>
+        /// <para>创建人：龚宇超</para>
+        /// <para>创建日期：2019-08-30 </para>
+        /// <para>修改人：</para>
+        /// <para>修改日期：</para>
+        /// <para>修改备注：</para>
+        /// <para>版本：1.0</para>
+        /// </summary>
+        /// <param name="sql">The SQL.</param>
+        /// <param name="parameters">The parameters.</param>
+        /// <returns>DataTable.</returns>
+        public static DataTable ExecuteDataTable(string sql, params SqlParameter[] parameters)
+        {
+            try
+            {
+                using (SqlDataAdapter adapter = new SqlDataAdapter(sql, GetSqlConnectionString()))
+                {
+                    DataTable dt = new DataTable();
+                    adapter.SelectCommand.Parameters.AddRange(parameters);
+                    adapter.Fill(dt);
+                    return dt;
+                }
+            }
+            catch (Exception)
+            {
+            }
+            return new DataTable();
+        }
+        public static SqlDataReader ExecuteReader(string sqlText, params SqlParameter[] parameters)
+        {
+            //SqlDataReader要求，它读取数据的时候有，它独占它的SqlConnection对象，而且SqlConnection必须是Open状态
+            SqlConnection conn = new SqlConnection(GetSqlConnectionString());//不要释放连接，因为后面还需要连接打开状态
+            SqlCommand cmd = conn.CreateCommand();
+            conn.Open();
+            cmd.CommandText = sqlText;
+            cmd.Parameters.AddRange(parameters);
+            //CommandBehavior.CloseConnection当SqlDataReader释放的时候，顺便把SqlConnection对象也释放掉
+            return cmd.ExecuteReader(CommandBehavior.CloseConnection);
+        }
+    }
+}