自定义Exception
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.Serialization; namespace Model
{
/// <summary>
/// This class is used to define the custom exception.
/// </summary>
[DataContract]
public class MyExceptionContainer:Exception
{
/// <summary>
/// The exception's starck message.
/// </summary>
[DataMember]
public string ErrorMessage { get; set; } /// <summary>
/// The custom informtion.
/// </summary>
[DataMember]
public string Description { get; set; } #region Constructor public MyExceptionContainer() { } public MyExceptionContainer(string errorMessage, string description)
{
this.ErrorMessage = errorMessage;
this.Description = description;
} #endregion
}
}
UserException
using System;
using System.Runtime.Serialization;
using System.Security.Permissions; namespace Constant
{
/// <summary>
/// The class is defined for const fields of login exception.
/// </summary>
[Serializable]
public class UserException:Exception,ISerializable
{
#region Fields private string message;
private Exception innerException; #endregion #region Constructors public UserException() { } public UserException(string message)
{
this.message = message;
} public UserException(string message, Exception exception)
{
this.message = message;
this.innerException = exception;
} #endregion #region Const fileds of user functions' exception. public const string UserNameIsNull = "*Username is null.";
public const string PasswordIsNull = "*Password is null.";
public const string LoginedFailed = "*Username or password is wrong.";
public const string ChangeNewPasswordIsNull = "*New password is null.";
public const string ChangeConfirmIsNull = "*Confirm is null.";
public const string TwiceEnterIsNotSame = "*New password and confirm is not same.";
public const string PasswordIsWrong = "*Old Password is wrong.";
public const string UpdatePasswordFailed = "The error is come from UpdatePasswordFailed Method in UserDal Class.";
public const string RetrieveUserByUserName = "The error is come from RetrieveUserByUserName Method in UserDal Class.";
public const string ChangePasswordSucceed = "Change password succeed.";
public const string FormatException = "The parameter error."; #endregion
}
}
DAL
public int UpdatePassword(string newPassword, string userName)
{
int influenceNumber = ; try
{
string sqlText = SqlText.UpdatePassword;
SqlParameter[] parms = new SqlParameter[] {
new SqlParameter("@password", newPassword),
new SqlParameter("@userName", userName),
}; influenceNumber = SqlHelper.ExecuteNonQuery(sqlText, parms);
}
catch (SqlException ex)
{
throw new UserException(UserException.UpdatePasswordFailed, ex);
} return influenceNumber;
}
BLL
public IList<Exam> RetrieveExamList(string userName, int order)
{
try
{
return examDal.RetrieveExamList(userName, order);
}
catch (ExamException ex)
{
log.Error(ExamException.RetrieveExamList, ex);
throw new FaultException<MyExceptionContainer>( new MyExceptionContainer() {
ErrorMessage = ex.Message,
Description = ExamException.RetrieveExamList
});
}
}
Use
catch (FaultException<MyExceptionContainer> myException)
{
log.Error(myException.Message, myException);
}
catch (FaultException faultException)
{
log.Error(faultException.Message, faultException);
}
catch (Exception exception)
{
log.Error(exception.Message, exception);
}