command.ExecuteReader();

Question

when i use this code in my project in vs 2012 and my Database is Access it display an error in this line "  OleDbDataReader reader = command.ExecuteReader();" 

The error is :   " The SELECT statement includes a reserved word or an argument name that is misspelled or missing, or the punctuation is incorrect."

what should i do for solving this error ?

Thanks for any help 

Davood

------------------------------

This is my code :

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data.OleDb;

using System.Configuration;

public partial class _Default : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

    }

    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)

    {

        string connectionString, queryString;

        

        connectionString = ConfigurationManager.ConnectionStrings["ostanConnectionString"].ToString();

        queryString = "SELECT FROM situation where state ='" + DropDownList1.SelectedValue + "'";

        using (OleDbConnection connection = new OleDbConnection(connectionString))

        {

            OleDbCommand command = new OleDbCommand(queryString, connection);

            connection.Open();

            OleDbDataReader reader = command.ExecuteReader();

            DropDownList2.Items.Clear();

            while (reader.Read())

                DropDownList2.Items.Add(reader["city"].ToString());

            reader.Close();

            connection.Close();

        }

    }

}