asp.net 操作Access数据库

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Data;

using System.Data.OleDb;

using System.Configuration;

using System.Web.SessionState;

/// <summary>

///Method 的摘要说明

/// </summary>

public class Method

{

public Method()

{

//

//TODO: 在此处添加构造函数逻辑

//

}

public static readonly string cnnstring=ConfigurationManager.ConnectionStrings["con"].ConnectionString;

/// <summary>

/// olecmd为要执行的命令

/// commandtype是命令的类型

/// para是参数集合

/// 返回类型为DataTable

/// </summary>

/// <param name="sqlcmd"></param>

/// <param name="commandtype"></param>

/// <param name="para"></param>

/// <returns></returns>

public static DataTable Returm(string olecmd,CommandType commandtype,params OleDbParameter[] para)

{

using (OleDbConnection con = new OleDbConnection(cnnstring))

{

using (OleDbCommand cmd = new OleDbCommand(olecmd,con))

{

cmd.Parameters.AddRange(para);

using (OleDbDataAdapter oda = new OleDbDataAdapter(cmd))

{

DataTable dt = new DataTable();

oda.Fill(dt);

return dt;

}

}

}



}

/// <summary>

/// olecmd要执行的命令

/// commandtype命令类型

/// parar为命令的参数

/// 返回类型为void

/// 执行的操作为，增删除，修改，

/// </summary>

/// <param name="sqlcmd"></param>

/// <param name="commandtype"></param>

/// <param name="parar"></param>

public static void OleExecute(string olecmd,CommandType commandtype,params OleDbParameter[] parar)

{

using (OleDbConnection con = new OleDbConnection(cnnstring))

{

using (OleDbCommand cmd = new OleDbCommand(olecmd,con))

{

cmd.Parameters.AddRange(parar);

con.Open();

cmd.ExecuteNonQuery();

}

}





}

/// <summary>

/// olecmd要执行的命令

/// commandtype命令类型

/// parar为命令的参数

/// 返回类型为string

/// 判断记录是否存在

/// 以及返回符合条件的总记录数

/// 适用于用户登录

/// </summary>

/// <param name="olecmd"></param>

/// <param name="commantye"></param>

/// <param name="para"></param>

/// <returns></returns>

public static string OleYnRecord(string olecmd,CommandType commantye, params OleDbParameter[] para)

{

using (OleDbConnection con = new OleDbConnection(cnnstring))

{

using (OleDbCommand cmd = new OleDbCommand(olecmd,con))

{

DataSet ds = new DataSet();

cmd.Parameters.AddRange(para);

using (OleDbDataAdapter ada = new OleDbDataAdapter(cmd))

{

ada.Fill(ds);

if (ds.Tables[0].Rows.Count == 0)

{

return "no"; //无找到记录返回no

}

else if (ds.Tables[0].Rows.Count == 1)

{

return "yes"; //存在一条记录返回yes

}

else

{

return ds.Tables[0].Rows.Count.ToString(); //返回总记录数

}

}

}

}



}





}