VB.NET用户名和密码能区分大小写Ｃ＃怎么就不行了（ＡＣＣＥＳＳ数据库）高人指点下

OleDbConnection oc = new OleDbConnection( "Provider=Microsoft.Jet.OLEDB.4.0;Data source= " + Server.MapPath(@ "~\App_Data\DataBase.aspx "));
try
{
//打开数据库连接
oc.Open();
OleDbCommand cmd = new OleDbCommand( "select * from 用户信息 where 登陆ID= ' " + this.UserName.Text + " 'and 密码= ' " + this.Password.Text + " ' ", oc);

if (Convert.ToUInt32(cmd.ExecuteScalar())＞０)
{
Response.Redirect(@ "~\Register\User.aspx ");
}
else
{
this.LOGIN_LABEL.Visible = true;
this.LOGIN_LABEL.Text = "用户名称或密码错误! ";
}

}
catch (Exception error)
{
LOGIN_LABEL.Visible = true;
LOGIN_LABEL.Text = "处理失败！原因为： " + error.ToString();
}
finally
{
//关闭数据库连接
oc.Close();
}

[解决办法]
OleDbCommand cmd = new OleDbCommand( "select Count(*) from 用户信息 where not strcomp(登陆ID, ' " + this.UserName.Text + " ',0) and not strcomp(密码, ' " + this.Password.Text + " ',0) ", oc);


if (Convert.ToInt32(cmd.ExecuteNonQuery()) > 0)