MySqlException Class

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The exception that is generated when MySQL returns an error.

Syntax

Visual Basic
C#


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


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

Remarks

This class is created whenever dotConnect for MySQL encounters an error generated by the server, or MySqlConnection has been closed before attempting to execute an operation on the server.

Example

The following example generates a MySqlException due to a non-existing table, and then displays the exception.

csharp


public void ThrowMySqlException() { string mySelectQuery = "SELECT * FROM NONEXISTINGTABLE"; MySqlConnection myConnection = new MySqlConnection( "User Id=root;Host=localhost;Database=Test;"); MySqlCommand myCommand = new MySqlCommand(mySelectQuery,myConnection); try { myCommand.Connection.Open(); } catch (MySqlException myException) { MessageBox.Show("Message: " + myException.Message + "\n"); } }

public void ThrowMySqlException()
{
  string mySelectQuery = "SELECT * FROM NONEXISTINGTABLE";
  MySqlConnection myConnection =
    new MySqlConnection(
        "User Id=root;Host=localhost;Database=Test;");
  MySqlCommand myCommand = new MySqlCommand(mySelectQuery,myConnection);
  try
  {
    myCommand.Connection.Open();
  }
  catch (MySqlException myException)
  {
    MessageBox.Show("Message: " + myException.Message + "\n");
  }
}

Visual Basic


Public Sub ThrowMySqlException() Dim mySelectQuery As String = "SELECT * FROM NONEXISTINGTABLE" Dim myConnection As New MySqlConnection( _ "User Id=root;Host=localhost;Database=Test;") Dim myCommand As New MySqlCommand(mySelectQuery, myConnection) Try myCommand.Connection.Open() Catch myException As MySqlException MessageBox.Show("Message: " + myException.Message + ControlChars.Cr) End Try End Sub

Public Sub ThrowMySqlException()
  Dim mySelectQuery As String = "SELECT * FROM NONEXISTINGTABLE"
  Dim myConnection As New MySqlConnection( _
    "User Id=root;Host=localhost;Database=Test;")
  Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)
  Try
    myCommand.Connection.Open()
  Catch myException As MySqlException
    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.MySql.MySqlException

Reference

MySqlException Members
Devart.Data.MySql Namespace
MySqlConnection Class
MySqlCommand Class

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