How can I get an error message that happens when using ExecuteNonQuery()?

Question

I am executing a command in this way :

var Command = new SqlCommand(cmdText, Connection, tr);

Command.ExecuteNonQuery();

In the command th

Answer 1

You catch the SqlException using try/catch

 try
  {
       //.......
    Command.ExecuteNonQuery();      
   }
    catch (SqlException ex)
     {   
       log (SqlExceptionMessage(ex).ToString());
     }

The following Method Catch details of SqlException which can be logged or displayed to user

  public StringBuilder SqlExceptionMessage(SqlException ex)
    {
        StringBuilder sqlErrorMessages = new StringBuilder("Sql Exception:\n");

        foreach (SqlError error in ex.Errors)
        {
            sqlErrorMessages.AppendFormat("Mesage: {0}\n", error.Message)
                .AppendFormat("Severity level: {0}\n", error.Class)
                .AppendFormat("State: {0}\n", error.State)
                .AppendFormat("Number: {0}\n", error.Number)
                .AppendFormat("Procedure: {0}\n", error.Procedure)
                .AppendFormat("Source: {0}\n", error.Source)
                .AppendFormat("LineNumber: {0}\n", error.LineNumber)
                .AppendFormat("Server: {0}\n", error.Server)
                .AppendLine(new string('-',error.Message.Length+7));

        }
        return sqlErrorMessages;
    }

The Generated message look like:

 Sql Exception:
 Mesage: Error converting data type nvarchar to datetime.
 Severity level: 16
 State: 5
 Number: 8114
 Procedure: Sales by Year
 Source: .Net SqlClient Data Provider
 LineNumber: 0
 Server: myserver
 -------------------------------------------------------