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
}
}
