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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
namespace DAL
{
public class SQLHelper
{
private string connStr = null;
private SqlConnection conn = null;
private SqlCommand cmd = null;
private SqlDataReader sdr = null;
public SQLHelper()
{
//connStr=Web.config连接字符串
connStr=@"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Db.mdf;Integrated Security=True;User Instance=True";
/*
<connectionStrings>
<add name="DbConnectionString" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Db.mdf;Integrated Security=True;User Instance=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
*/
conn = new SqlConnection(connStr);
}
/// <summary>
/// 获取Connection对象
/// </summary>
/// <returns></returns>
private SqlConnection GetConn()
{
if (conn.State == ConnectionState.Closed)
{
conn.Open();
}
return conn;
}
/// <summary>
/// 执行查询
/// </summary>
/// <param name="cmdText">要执行的sql语句、或存储过程名</param>
/// <param name="ct">cmdType类型</param>
/// <returns></returns>
public DataTable ExecuteQuery(string cmdText,CommandType ct)
{
DataTable dt = new DataTable();
cmd = new SqlCommand(cmdText, GetConn());
cmd.CommandType = ct;
using (sdr = cmd.ExecuteReader(CommandBehavior.CloseConnection))//关闭cmd同时关闭conn
{
dt.Load(sdr);
}
return dt;
}
/// <summary>
/// 执行带参数的查询
/// </summary>
/// <param name="cmdText">要执行的sql语句、或存储过程名</param>
/// <param name="para">Para参数</param>
/// <param name="ct">cmdType类型</param>
/// <returns></returns>
public DataTable ExecuteQuery(string cmdText, SqlParameter[] para,CommandType ct)
{
DataTable dt = new DataTable();
cmd = new SqlCommand(cmdText, GetConn());
cmd.CommandType = ct;
cmd.Parameters.AddRange(para);
using (sdr = cmd.ExecuteReader(CommandBehavior.CloseConnection))//关闭cmd同时关闭conn
{
dt.Load(sdr);
}
return dt;
}
/// <summary>
/// 执行sql增删改
/// </summary>
/// <param name="cmdText">要执行的sql语句、或存储过程名</param>
/// <param name="ct">cmdType类型</param>
/// <returns></returns>
public int ExecuteNoQuery(string cmdText,CommandType ct)
{
int res;
cmd = new SqlCommand(cmdText, GetConn());
cmd.CommandType = ct;
try
{
res = cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (conn.State == ConnectionState.Open)
{
conn.Close();
}
}
return res;
}
/// <summary>
/// 执行sql增删改
/// </summary>
/// <param name="cmdText">要执行的sql语句、或存储过程名</param>
/// <param name="para">Para参数</param>
/// <param name="ct">cmdType类型</param>
/// <returns></returns>
public int ExecuteNoQuery(string cmdText, SqlParameter[] para,CommandType ct)
{
int res;
cmd = new SqlCommand(cmdText, GetConn());
cmd.CommandType=ct;
cmd.Parameters.AddRange(para);
try
{
res = cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (conn.State == ConnectionState.Open)
{
conn.Close();
}
}
return res;
}
/// <summary>
/// 执行返回单一数据的sql语句
/// </summary>
/// <param name="sql">要执行的sql语句</param>
/// <returns></returns>
/* public object ExecuteScalar(string sql)
{
object res;
cmd = new SqlCommand(sql, GetConn());
try
{
res = cmd.ExecuteScalar();
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (conn.State == ConnectionState.Open)
{
conn.Close();
}
}
return res;
}
*/
}
}
/*
林舜煌
*/
using System;
using System.Collections.Generic;
using System.Web;
using System.Data.OleDb;
using System.Data;
using System.Configuration;
/// <summary>
///OldHelper access数据库助手类
/// </summary>
namespace DAL
{
public class OledbHelper
{
private string connStr = null;
private OleDbConnection conn = null;
private OleDbCommand cmd = null;
private OleDbDataReader sdr = null;
public OledbHelper()
{
/*
<connectionStrings>
<add name="DbConnectionString" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=F:\WebSite2\App_Data\db1.mdb;Persist Security Info=True" />
</connectionStrings>
connStr = ConfigurationManager.ConnectionStrings["DbConnectionString"].ConnectionString;
*/
connStr = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=F:\WebSite2\App_Data\db1.mdb;Persist Security Info=True";
conn = new OleDbConnection(connStr);
}
/// <summary>
/// 获取Connection对象
/// </summary>
/// <returns></returns>
private OleDbConnection GetConn()
{
if (conn.State == ConnectionState.Closed)
{
conn.Open();
}
return conn;
}
/// <summary>
/// 执行查询
/// </summary>
/// <param name="cmdText">要执行的sql语句、或存储过程名</param>
/// <param name="ct">cmdType类型</param>
/// <returns></returns>
public DataTable ExecuteQuery(string cmdText, CommandType ct)
{
DataTable dt = new DataTable();
cmd = new OleDbCommand(cmdText, GetConn());
cmd.CommandType = ct;
using (sdr = cmd.ExecuteReader(CommandBehavior.CloseConnection))//关闭cmd同时关闭conn
{
dt.Load(sdr);
}
return dt;
}
/// <summary>
/// 执行带参数的查询
/// </summary>
/// <param name="cmdText">要执行的sql语句、或存储过程名</param>
/// <param name="para">Para参数</param>
/// <param name="ct">cmdType类型</param>
/// <returns></returns>
public DataTable ExecuteQuery(string cmdText, OleDbParameter[] para, CommandType ct)
{
DataTable dt = new DataTable();
cmd = new OleDbCommand(cmdText, GetConn());
cmd.CommandType = ct;
cmd.Parameters.AddRange(para);
using (sdr = cmd.ExecuteReader(CommandBehavior.CloseConnection))//关闭cmd同时关闭conn
{
dt.Load(sdr);
}
return dt;
}
/// <summary>
/// 执行sql增删改
/// </summary>
/// <param name="cmdText">要执行的sql语句、或存储过程名</param>
/// <param name="ct">cmdType类型</param>
/// <returns></returns>
public int ExecuteNoQuery(string cmdText, CommandType ct)
{
int res;
cmd = new OleDbCommand(cmdText, GetConn());
cmd.CommandType = ct;
try
{
res = cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (conn.State == ConnectionState.Open)
{
conn.Close();
}
}
return res;
}
/// <summary>
/// 执行sql增删改
/// </summary>
/// <param name="cmdText">要执行的sql语句、或存储过程名</param>
/// <param name="para">Para参数</param>
/// <param name="ct">cmdType类型</param>
/// <returns></returns>
public int ExecuteNoQuery(string cmdText, OleDbParameter[] para, CommandType ct)
{
int res;
cmd = new OleDbCommand(cmdText, GetConn());
cmd.CommandType = ct;
cmd.Parameters.AddRange(para);
try
{
res = cmd.ExecuteNonQuery();
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (conn.State == ConnectionState.Open)
{
conn.Close();
}
}
return res;
}
/// <summary>
/// 执行返回单一数据的sql语句
/// </summary>
/// <param name="sql">要执行的sql语句</param>
/// <param name="para">参数集</param>
/// <returns></returns>
public object ExecuteScalar(string cmdText, OleDbParameter[] para, CommandType ct)
{
object res;
cmd = new OleDbCommand(cmdText, GetConn());
cmd.CommandType = ct;
cmd.Parameters.AddRange(para);
try
{
res = cmd.ExecuteScalar();
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (conn.State == ConnectionState.Open)
{
conn.Close();
}
}
return res;
}
/// <summary>
/// 执行返回单一数据的sql语句
/// </summary>
/// <param name="sql">要执行的sql语句</param>
/// <returns></returns>
public object ExecuteScalar(string cmdText, CommandType ct)
{
object res;
cmd = new OleDbCommand(cmdText, GetConn());
cmd.CommandType = ct;
try
{
res = cmd.ExecuteScalar();
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (conn.State == ConnectionState.Open)
{
conn.Close();
}
}
return res;
}
}
}
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