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  • 【转】SQL 操作类

    using System;
    using System.Collections.Generic;
    using System.Text;
    using System.Data;
    using System.Data.SqlClient;
    using System.Windows.Forms;
    namespace yjgl
    {
        /// <summary>    
        /// 数据访问基础类(SQL)    
        /// </summary> 
        class BaseOperate
        {
            #region  建立数据库连接
            /// <summary>
            /// 建立数据库连接.
            /// </summary>
            /// <returns>返回SqlConnection对象</returns>
            public SqlConnection getcon()
            {
                string M_str_sqlcon = "Data Source=PC-200201010009 ;Database=db_yjzl;User ID=sa;PWD=123";//连接字符串
                SqlConnection mycon = new SqlConnection(M_str_sqlcon);      //创建连接对象 
                return mycon;
            }
            #endregion
            #region  执行SqlCommand命令
            /// <summary>
            /// 执行SqlCommand
            /// </summary>
            /// <param name="M_str_sqlstr">SQL语句</param>
            public void getcom(string M_str_sqlstr)
            {
                SqlConnection sqlcon = this.getcon();   //获取连接字符串
                sqlcon.Open();       //打开连接
                try
                {
                    SqlCommand sqlcom = new SqlCommand(M_str_sqlstr, sqlcon);  //通过SQL语句和连接对象创建命令对象
                    sqlcom.ExecuteNonQuery();     //对sqlcon执行SQL语句并返回受影响的行数
                    sqlcom.Dispose();           //释放sqlcom'
                }
                catch (SqlException e)
                {
                    MessageBox.Show(e.ToString(), "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
                finally
                {
                    sqlcon.Close();
                    sqlcon.Dispose();
                }
            }
            #endregion
            #region  创建DataSet对象
            /// <summary>
            /// 创建一个DataSet对象
            /// </summary>
            /// <param name="M_str_sqlstr">SQL语句</param>
            /// <param name="M_str_table">表名</param>
            /// <returns>返回DataSet对象</returns>
            public DataSet getds(string M_str_sqlstr, string M_str_table)  //查询
            {
                SqlConnection sqlcon = this.getcon();
                SqlDataAdapter sqlda = new SqlDataAdapter(M_str_sqlstr, sqlcon);
                DataSet myds = new DataSet();
                sqlda.Fill(myds, M_str_table);
                return myds;
             }
            #endregion
             #region  创建SqlDataReader对象
             /// <summary>
             /// 创建一个SqlDataReader对象
             /// </summary>
             /// <param name="M_str_sqlstr">SQL语句</param>
             /// <returns>返回SqlDataReader对象</returns>
            public SqlDataReader getread(string M_str_sqlstr)
            {
                SqlConnection sqlcon = this.getcon();
                SqlCommand sqlcom = new SqlCommand(M_str_sqlstr, sqlcon);
                sqlcon.Open();
                SqlDataReader sqlread = sqlcom.ExecuteReader(CommandBehavior.CloseConnection); 
                return sqlread;
                
             }
            #endregion
        }
    }
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  • 原文地址:https://www.cnblogs.com/ZXdeveloper/p/3769637.html
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