vtpolar.blogg.se - Pervasive sql client for mac

#PERVASIVE SQL CLIENT FOR MAC MANUAL#
#PERVASIVE SQL CLIENT FOR MAC SOFTWARE#
#PERVASIVE SQL CLIENT FOR MAC CODE#

#PERVASIVE SQL CLIENT FOR MAC MANUAL#

But this isnt dynamic - new users would need manual updating.

A powerful reporting tool providing business intelligence.

Pervasive sees the server name or any comments about this.

So, in general, write an exception handler that catches any provider specific exceptions as well as exceptions from the common language runtime. Calling a method at the wrong time can raise System.InvalidOperationException. NET Framework data provider type to raise an exception such as System.ArgumentException or System.IndexOutOfRangeException. Recovery from these exceptions may not be possible.īad input can cause a. NET Framework exceptions such as System.OutOfMemoryException and. NET Framework data provider types can raise. In addition to the provider-specific errors. For the best level of error detail, catch these exceptions and use the members of these exception classes to get details of the error. For example has OdbcException, has OleDbException, and has SqlException. NET Framework data provider reports provider-specific errors. NET Framework 4.5, SqlException can return an inner Win32Exception. Transactions can fail, so catch failures and retry the transaction. Features like or the BeginTransaction method (in, , and ) ensure consistent data regardless of exceptions raised by a provider. You can use database transactions to ensure that the data is consistent regardless of what happens in the client application (including a crash).

#PERVASIVE SQL CLIENT FOR MAC CODE#

Your code should catch exceptions to prevent the application from crashing and to allow displaying a relevant error message to the user. The following is general information on handling exceptions. The SqlException class maps to SQL Server severity. In both cases, a SqlException is generated by the method executing the command.įor information about the warning and informational messages sent by SQL Server, see Database Engine Events and Errors. However, the user can reopen the connection and continue. When the severity level is 20 or greater, the server ordinarily closes the SqlConnection. The SqlConnection remains open when the severity level is 19 or less.

When a level 17, 18, or 19 error occurs, you can continue working, although you might not be able to execute a particular statement.

#PERVASIVE SQL CLIENT FOR MAC SOFTWARE#

Severity levels from 17 through 25 indicate software or hardware errors. Severity levels from 11 through 16 are generated by the user, and can be corrected by the user. Messages that have a severity level of 10 or less are informational and indicate problems caused by mistakes in information that a user has entered. (Client side errors are thrown as standard common language runtime exceptions.) SqlException always contains at least one instance of SqlError.

NET Framework Data Provider for SQL Server encounters an error generated from the server. & "Procedure: " & ex.Errors(i).Procedure & ControlChars.NewLine)Ĭonsole.WriteLine(errorMessages.ToString()) & "Source: " & ex.Errors(i).Source & ControlChars.NewLine _ & "LineNumber: " & ex.Errors(i).LineNumber & ControlChars.NewLine _ & "Message: " & ex.Errors(i).Message & ControlChars.NewLine _ Using connection As New SqlConnection(connectionString)ĭim command As New SqlCommand(queryString, connection)ĮrrorMessages.Append("Index #" & i.ToString() & ControlChars.NewLine _ Public Sub ShowSqlException(ByVal connectionString As String)ĭim queryString As String = "EXECUTE NonExistantStoredProcedure"

"Procedure: " + ex.Errors.Procedure + "\n") Ĭonsole.WriteLine(errorMessages.ToString()) "LineNumber: " + ex.Errors.LineNumber + "\n" + SqlCommand command = new SqlCommand(queryString, connection) įor (int i = 0 i < ex.Errors.Count i++)ĮrrorMessages.Append("Index #" + i + "\n" + Using (SqlConnection connection = new SqlConnection(connectionString)) StringBuilder errorMessages = new StringBuilder() String queryString = "EXECUTE NonExistantStoredProcedure" public static void ShowSqlException(string connectionString) The following example generates a SqlException and then displays the exception.