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ACCESS的参数化查询

 2008-11-22 00:00:00 来源:WEB开发网   
核心提示: using System;using System.Data;using System.Configuration;using System.Web;using System.Data.OleDb;namespace acc_select{/// <summary>/// accse

  using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Data.OleDb;
namespace acc_select
{
  /// <summary>
  /// accselect 的摘要说明
  /// </summary>
  public class accselect
  {
  //"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=d:dqdb1.mdb"
    private string conn = ConfigurationManager.ConnectionStrings["tsingConnectionString"].ToString();
    public string sql = string.Empty;
    public int t = 4;
    public object v = null;
    public accselect()
    {
    }
  /// <summary>
    /// 构造函数,传递ACC参数查询语句
    /// </summary>
    /// <param name="strsql">strsql字符型</param>
    public accselect(string strsql)
    {
      sql = strsql;
    }
    /// <summary>
    /// 构造函数,传递ACC参数查询语句
    /// </summary>
    /// <param name="strsql">参数查询语句</param>
    /// <param name="total">字节数</param>
    public accselect(string strsql, int total)
    {
      sql = strsql;
      t = total;
    }
    /// <summary>
    /// 构造函数
    /// </summary>
    /// <param name="strsql">参数查询语句</param>
    /// <param name="total">字节数</param>
    /// <param name="value">OBJECT值</param>
    public accselect(string strsql, int total, object value)
    {
      sql = strsql;
      t = total;
      v = value;
    }
    /// <summary>
    /// getOdd方法返回OleDbDataReader
    /// </summary>
    /// <param name="odt">定义OleDbType类型</param>
    /// <returns></returns>
    public OleDbDataReader getOdd(OleDbType odt)
    {
      OleDbConnection conns = new OleDbConnection(this.conn);
      OleDbCommand cmd = new OleDbCommand(this.sql, conns);
      OleDbParameter parm = new OleDbParameter("temp", odt, this.t);
      parm.Direction = ParameterDirection.Input;
      cmd.Parameters.Add(parm);
      cmd.Parameters[0].Value = this.v;
      conns.Open();
      OleDbDataReader oda = cmd.ExecuteReader();
      cmd.Dispose();
      return oda;
    }
    string Sql
    {
      get
      {
        return sql;
      }
      set
      {
        sql = value;
      }
    }
    int T
    {
      get
      {
        return t;
      }
      set
      {
        t = value;
      }
    }
    object V
    {
      get
      {
        return v;
      }
      set
      {
        v = value;
  }
    }
  }
}
//调用方法
//accselect acc = new accselect();
//acc.sql = "select * from dtt where d_id=?";
//acc.t = 10;
//acc.v = 1;
//OleDbDataReader oda = acc.getOdd(OleDbType.VarChar);
//Repeater1.DataSource = oda;
//Repeater1.DataBind();
function acc_sql(sql,adotype,adodct,strlong,values)
dim connstring,mycmd,myrs,conn
 
 connString="Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" & Server.MapPath("db1.mdb")
 set conn = Server.CreateObject("Adodb.Connection")
 conn.ConnectionString = connString
 conn.open()
 set mycmd = Server.CreateObject("ADODB.Command")
 mycmd.ActiveConnection=conn
 mycmd.CommandText=sql
 mycmd.Prepared = true
 set mypar = mycmd.CreateParameter("temp",adotype,adodct,strlong,values)
 mycmd.Parameters.Append mypar
 set myrs = mycmd.Execute
 set acc_sql=myrs 
end function
’调用方法
’dim rs
’sql="select * from users where id=? order by id"
’set rs=acc_sql(sql,3,1,4,1)
’if not rs.eof then
  ’response.Write(rs(1))
’end if

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Tags:ACCESS 参数 查询

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