C#操作Access实例解析

C#操作Access实例是怎么实现的呢？让我们来看看具体的代码： using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.We

C#操作Access实例是怎么实现的呢？让我们来看看具体的代码：

using System;  
using System.Data;  
using System.Configuration;  
using System.Web;  
using System.Web.Security;  
using System.Web.UI;  
using System.Web.UI.WebControls;  
using System.Web.UI.WebControls.WebParts;  
using System.Web.UI.HtmlControls;  
using System.Data.OleDb;   
 
/// 
  
/// DataAccess 的摘要说明 C#操作Access实例解析 
///   
public class DataAccess  
{  
 protected static OleDbConnection conn = new OleDbConnection();  
 protected static OleDbCommand comm = new OleDbCommand();  
public DataAccess()  
{  
   //init C#操作Access实例解析 
}  
 private static void openConnection()  
 {  
if (conn.State == ConnectionState.Closed)  
{  
conn.ConnectionString = @"Provider=Microsoft.Jet.OleDb.4.0;  
Data Source="+ConfigurationManager.AppSettings["myconn"];  
//web.config文件里设定。  
comm.Connection = conn;  
try 
{  
conn.Open();  
}  
catch (Exception e)  
{ throw new Exception(e.Message); }  
 
}  
     
 }//打开数据库 C#操作Access实例解析
    
 private static void closeConnection()  
 {  
if (conn.State == ConnectionState.Open)  
{   
conn.Close();  
conn.Dispose();  
comm.Dispose();  
}  
 }//关闭数据库 C#操作Access实例解析 
 
 public static void excuteSql(string sqlstr)  
 {  
try 
{  
openConnection();  
comm.CommandType = CommandType.Text;  
comm.CommandText = sqlstr;  
comm.ExecuteNonQuery();  
}  
catch (Exception e)  
{  
throw new Exception(e.Message);  
}  
finally 
{ closeConnection(); }  
 }//执行sql语句 C#操作Access实例解析 
 
 public static OleDbDataReader dataReader(string sqlstr)  
 {  
OleDbDataReader dr = null;  
try 
{  
openConnection();  
comm.CommandText = sqlstr;  
comm.CommandType = CommandType.Text;  
 
dr = comm.ExecuteReader(CommandBehavior.CloseConnection);  
}  
catch 
{  
try 
{  
dr.Close();  
closeConnection();  
}  
catch { }  
}  
return dr;  
}  
//返回指定sql语句的OleDbDataReader对象，使用时请注意关闭这个对象。  
 public static void dataReader(string sqlstr,  
 ref OleDbDataReader dr)  
 {  
try 
{  
openConnection();  
comm.CommandText = sqlstr;  
comm.CommandType = CommandType.Text;  
dr=comm.ExecuteReader(CommandBehavior.CloseConnection);  
}  
catch 
{  
try 
{  
if (dr != null && !dr.IsClosed)  
   dr.Close();  
}  //C#操作Access实例解析
catch 
{  
}  
finally 
{  
closeConnection();  
}  
}  
 }  
//返回指定sql语句的OleDbDataReader对象,使用时请注意关闭  
 
 public static DataSet dataSet(string sqlstr)  
 {  
DataSet ds = new DataSet();  
OleDbDataAdapter da = new OleDbDataAdapter();  
try 
{  
openConnection();  
comm.CommandType = CommandType.Text;  
comm.CommandText = sqlstr;  
da.SelectCommand = comm;  
da.Fill(ds);  
 
}  
catch (Exception e)  
{  
throw new Exception(e.Message);  
}  
finally 
{  
closeConnection();  
}  
return ds;  
 }//返回指定sql语句的dataset C#操作Access实例解析 
 
 public static void dataSet(  
string sqlstr, ref DataSet ds)  
 {  
OleDbDataAdapter da = new OleDbDataAdapter();  
try 
{  
openConnection();  
comm.CommandType = CommandType.Text;  
comm.CommandText = sqlstr;  
da.SelectCommand = comm;  
da.Fill(ds);  
}  
catch (Exception e)  
{  
throw new Exception(e.Message);  
}  
finally 
{  
closeConnection();  
}  
 }//返回指定sql语句的dataset C#操作Access实例解析
 
 public static DataTable dataTable(string sqlstr)  
 {  
DataTable dt = new DataTable();  
OleDbDataAdapter da = new OleDbDataAdapter();  
try 
{  
openConnection();  
comm.CommandType = CommandType.Text;  
comm.CommandText = sqlstr;  
da.SelectCommand = comm;  
da.Fill(dt);  
}  
catch (Exception e)  
{  
throw new Exception(e.Message);  
}  
finally 
{  
closeConnection();  
}  
return dt;  
 }//返回指定sql语句的datatable  
 public static void dataTable(  
string sqlstr, ref DataTable dt)  
 {  
OleDbDataAdapter da = new OleDbDataAdapter();  
try 
{  
openConnection();  
comm.CommandType = CommandType.Text;  
comm.CommandText = sqlstr;  
da.SelectCommand = comm;  
da.Fill(dt);  
}  
catch (Exception e)  
{  
throw new Exception(e.Message);  
}  
finally 
{  
closeConnection();  
}  
 }//返回指定sql语句的datatable C#操作Access实例解析 
 
 public static DataView dataView(string sqlstr)  
 {  
OleDbDataAdapter da = new OleDbDataAdapter();  
DataView dv = new DataView();  
DataSet ds = new DataSet();  
try 
{  
openConnection();  
comm.CommandType = CommandType.Text;  
comm.CommandText = sqlstr;  
da.SelectCommand = comm;  
da.Fill(ds);  
dv = ds.Tables[0].DefaultView;  
}  
catch (Exception e)  
{  
throw new Exception(e.Message);  
}  
finally 
{  
closeConnection();  
}  
return dv;  
 }  
//返回指定sql语句的dataview C#操作Access实例解析 
 
} 

C#操作Access实例解析的基本内容就向你介绍到这里，希望对你了解和学习C#操作Access有所帮助。