How to send the exception message to the caller

Question

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

petre ricardo · Answer

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?

Roei Bar · Answer

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) {} }