How to send the exception message to the caller

petre ricardo

Hi,
I have the following method:

 public void SaveData

try

      connectionObj.Open();

      int i = command.ExecuteNonQuery()

      connectionObj.Open();

catch(SQLException ex)

   //i want to add a custome error message to teh message Property of "ex" and

//i want to throw "ex" object to the caller

how do i add a custome error message to teh message Property of "ex" and throw the ex object to teh caller from catch block?

TY in Advance

2 Replies

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petre ricardo17y ago
thanks Roei,

1. But why we create a Serializable Exception class
2.
public InternalErrorException(string errorMessage) : base(errorMessage) {} public InternalErrorException(string errorMessage, Exception innerEx) : base(errorMessage, innerEx) {}
I'm assuming that "InternalErrorException" that you have tried to meant the constructor of the mYCustomerException class therefore souldn't the name "InternalErrorException" changed to "MyCustomerException"?
0

Roei Bar17y ago

you will need to build a custom Exception as following :

in the catch you will write :

  throw new MyCustomException(
              "Database error: Unable to fill dataset", err);

we create a serializable Exception Class:

 [Serializable]
public class _ErrorException : Exception
{
public string ErrorMessage
{
get
{
    return base.Message.ToString();
}
}

public _ErrorException(string errorMessage)
                   : base(errorMessage) {}

public _ErrorException(string errorMessage, Exception innerEx)
                   : base(errorMessage, innerEx) {}
}

 Now we will create MyCustomException class :

MyCustomException which inherits from _ErrorException:

 public class MyCustomException : _ErrorException
{
public InternalErrorException(string errorMessage)
                             : base(errorMessage) {}   

public InternalErrorException(string errorMessage, Exception innerEx)
                             : base(errorMessage, innerEx) {}
}