.net中OleDbDataReader问题

[fendudu1987]

由于自己看不懂程序，不知道为什么错误，请大侠帮帮忙！！程序如下：
private void Login_Click(object sender, System.EventArgs e)
{ conn.Open();
String sql = "select UserName,[Password],FullName,Degree from [User] where UserName='"+ UserName.Text +"'";
OleDbDataReader reader = new OleDbDataReader();
OleDbCommand cmd = new OleDbCommand(sql,conn);
reader=cmd.ExecuteReader();
if(reader.Read())
{
if((string)reader["Password"]!=Password.Text)
{
Response.Write("你输入的密码有误");
return;
}
}
else
{
Response.Write("无效的用户名");
return;
}
Session["UserName"]=reader["UserName"].ToString();
Session["FullName"]=reader["FullName"].ToString();
Session["Degree"]=reader["Degree"].ToString();
Session["Message"]=Session["UserName"].ToString()+"欢迎您！";
switch(reader["Degree"].ToString())
{
case"发布者":
Response.Redirect("fbzmain.aspx");
break;
case"求职者":
Response.Redirect("qzzmain.aspx");
break;
}

}
}
}

提示错误：重载“OleDbDataReader”方法为获取“0”参数

[pinyu]

OleDbDataReader reader = new OleDbDataReader();
去掉new

[wxy0401]

{ conn.Open();
String sql = "select UserName,[Password],FullName,Degree from [User] where UserName='"+ UserName.Text +"'";
OleDbCommand cmd = new OleDbCommand(sql,conn);
OleDbDataReader reader=cmd.ExecuteReader();

[fendudu1987]

还是不对，提示：System.Data.OleDbDataReader表示“类”，在给定的上下文中无效。

[fendudu1987]

[Quote=引用 2 楼 wxy0401 的回复:]
{ conn.Open();
String sql = "select UserName,[Password],FullName,Degree from [User] where UserName='"+ UserName.Text +"'";
OleDbCommand cmd = new OleDbCommand(sql,conn);
OleDbDataReader reader=cmd.ExecuteReader();
[/Quote]
成功了~~谢谢啊~~o(∩_∩)o...~~wxy真厉害~~可是涅，运行时出现：试图运行项怒时出错：无法在WEB服务器上启动调试。未将项目配置为进行调试。帮帮忙~~