如何在web.config中建立公用的的數據庫連接

<configuration>
    <!-- application specific settings -->
    <aPPSettings>
        <add key=ConnectionString value=server=localhost;uid=sa;pwd=;database=store />
    </aPPSettings>
<configuration>

public SqlDataReader GetRevIEws(int productID) {

    // 創建Connection和Command對象實例
    SqlConnection myConnection = new SqlConnection(ConfigurationSettings.APPSettings[ConnectionString]);
    SqlCommand myCommand = new SqlCommand(RevIEwsList, myConnection);

    myCommand.CommandType = CommandType.StoredProcedure;

    // 參數
    SqlParameter parameterProductID = new SqlParameter(@ProductID, SqlDbType.Int, 4);
    parameterProductID.Value = productID;
    myCommand.Parameters.Add(parameterProductID);

    // 執行
    myConnection.Open();
    SqlDataReader result = myCommand.ExecuteReader(CommandBehavior.CloseConnection);

    // 返回結果
    return result;
數據庫連接;return true>