UniException Class

In This Topic

The exception that is generated when server returns an error.

Syntax

Visual Basic
C#

'Declaration
 
Public Class UniException 
   Inherits System.Data.Common.DbException
   Implements System.Runtime.InteropServices._Exception, System.Runtime.Serialization.ISerializable

public class UniException : System.Data.Common.DbException, System.Runtime.InteropServices._Exception, System.Runtime.Serialization.ISerializable

Remarks

This class is created whenever the Universal .NET Data Provider encounters an error generated by the server, or UniConnection has been closed before attempting to execute an operation on the server.

Example

The following example generates a UniException due to a missing database, and then displays the exception.

csharp

public void ThrowUniException()
{
  string mySelectQuery = "SELECT * FROM Test.Dept";
  UniConnection myConnection =
    new UniConnection("Provider=SQL Server;Data Source=SERVER;Initial Catalog=Northwind;User ID=sa");
  UniCommand myCommand = new UniCommand(mySelectQuery,myConnection);
  try
  {
    myCommand.Connection.Open();
  }
  catch (UniException myException)
  {
    MessageBox.Show("Message: " + myException.Message + "\n");
  }
}

Visual Basic

Public Sub ThrowUniException()
  Dim mySelectQuery As String = "SELECT * FROM Test.Dept"
  Dim myConnection As New UniConnection _
    ("Provider=SQL Server;Data Source=SERVER;Initial Catalog=Northwind;User ID=sa")
  Dim myCommand As New UniCommand(mySelectQuery, myConnection)
  Try
    myCommand.Connection.Open()
  Catch myException As UniException
    MessageBox.Show("Message: " + myException.Message + ControlChars.Cr)
  End Try
End Sub

Inheritance Hierarchy

System.Object
   System.Exception
      System.SystemException
         System.Runtime.InteropServices.ExternalException
            System.Data.Common.DbException
               Devart.Data.Universal.UniException

Reference

UniException Members
Devart.Data.Universal Namespace
UniConnection Class
UniCommand Class

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