找不到可安装的 ISAM ?

[playfilemaker]

我用C#连接数据库,可是却错了,提示"找不到可安装的 ISAM",数据库放在了App_Data目录下,请大家指点.

//////////////////////////////////////////////////////////////////////////////////
/////////////////////////////读取Access数据库/////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////
OleDbConnection connection = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=¦DataDirectory ¦\\SysLog.mdb");
connection.Open();

OleDbCommand command = connection.CreateCommand();

command.CommandText = "SELECT * from LicenseInfo";

OleDbDataReader reader = command.ExecuteReader();

while (reader.Read())
{
Response.Write(reader["UserName"]);
Response.Write(reader["LicenseCount"]);
}

reader.Close();
connection.Close();

[蓝海D鱼]

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;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}
protected void Button1_Click(object sender, EventArgs e)
{
OleDbConnection conn = new OleDbConnection("provider=microsoft.jet.oledb.4.0;data source="+Server.MapPath("")+"\\CODEDB.mdb");
string sql = "select * from Code ";
OleDbDataAdapter oda = new OleDbDataAdapter(sql, conn);
DataSet ds = new DataSet();

oda.Fill(ds);

this.GridView1.DataSource = ds.Tables[0];
this.GridView1.DataBind();
}
}