_daltype in dalfactory return null

mohamed posted on Sunday, October 13, 2013

hello guys i am new in csla 2 days learn by practice i tried new asp project connectiong to sqlserver 2012 

i start doing IDalManager which contain GetProvider

 public  interface IDalManagerCslaExample:IDisposable

    {

       T GetProvider<T>() where T : class;

    }

also i creat DalManagerClass which implemnt IDalManager Interface

 public class DalManagerCslaExample:IDalManagerCslaExample

    {

        private static readonly string TypeMask =

            typeof(DalManagerCslaExample).FullName.Replace("DalManagerCslaExample",@"{0}");

        public ConnectionManager<SqlConnection> ConnectionManager {get; private set;}

        public DalManagerCslaExample()

        {

            try

            {

                //calling connection string from web.config

                ConnectionManager = ConnectionManager<SqlConnection>.GetManager("CslaExample");

            }

            catch (ConfigurationErrorsException ex)

            {

                if (ConnectionManager == null)

                { 

                throw new ArgumentException(string.Format("ConnectionString {0} Couldnt be found","CslaExample"));

                }

                throw;

            }

        }

        private const string BaseNamespace = "CslaExample.DataAccess";

        public T GetProvider<T>() where T : class

        {

            string typeName;

            var namespaceDiff = typeof(T).Namespace.Length - BaseNamespace.Length;

            if (namespaceDiff > 0)

                typeName = string.Format(TypeMask, typeof(T).Namespace.Substring(BaseNamespace.Length + 1,

                    namespaceDiff - 1)) + "." + typeof(T).Name.Substring(1);

            else

                typeName = string.Format(TypeMask, typeof(T).Name.Substring(1));

            var type = Type.GetType(typeName);

            if (typeName != null)

                return Activator.CreateInstance(type) as T;

            throw new NotImplementedException(typeName);

        }

then i created dalFactory class

    public class DalFactoryCslaExample

    {

        private static Type _daltype;

            public static IDalManagerCslaExample GetManager()

            {

                if (_daltype == null)

                {

                    var dalTypeName = ConfigurationManager.AppSettings["CslaExample.DalManagerType"];

                    if (!string.IsNullOrEmpty(dalTypeName))

                        _daltype = Type.GetType(dalTypeName);

                else

                        throw new NullReferenceException("CslaExample.DalManagerType");

                if (_daltype == null)

                    throw new ArgumentNullException(string.Format("Type {0} couldnt be found", dalTypeName));

                }

                return (IDalManagerCslaExample)Activator.CreateInstance(_daltype);

            }

    }

and on web.config i add thos lines to consume the DalManagerType

 <appSettings>

    <add key="CslaExample.DalManagerType" value="CslaExample.DataAccess.Sql.DalManagerCslaExample,CslaExample"/>

  </appSettings>

    <connectionStrings>

        <add name="CslaExample" connectionString="Data Source=192.168.1.3;Initial Catalog=FinalInvintoryDesign;User ID=sa;Password=123"

            providerName="System.Data.SqlClient" />

    </connectionStrings>

and all thos classes i did in 1 project but in sperated folders what exactly i miss and plz if some one have free tutorial explain this data access Technic that will be greaaat help

mohamed replied on Sunday, October 13, 2013

never mind guys it worked all i need is fixing my namespace in config file but i still ask fir help good tutorial to explain how data access work please hope no one tell me buy using csla 4 or some video training from store i am absoultly 100 % it worth every benny but unfornutly i dont have a mastercard to buy it from internet