MySqlException Class

MySQL Connector/Net

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MySQL Connector/Net

The exception that is thrown when MySQL returns an error. This class cannot be inherited.

Inheritance Hierarchy

SystemObject  SystemException
    SystemSystemException
      System.Runtime.InteropServicesExternalException
        System.Data.CommonDbException
          MySql.Data.MySqlClientMySqlException

Namespace: MySql.Data.MySqlClient
Assembly: MySql.Data (in MySql.Data.dll) Version: 6.9.9

Syntax

C++

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[SerializableAttribute]
public sealed class MySqlException : DbException

<SerializableAttribute>
Public NotInheritable Class MySqlException
	Inherits DbException

[SerializableAttribute]
public ref class MySqlException sealed : public DbException

[<SealedAttribute>]
[<SerializableAttribute>]
type MySqlException =  
    class
        inherit DbException
    end

The MySqlException type exposes the following members.

Properties

	Name	Description
	Data	Gets a collection of key/value pairs that provide additional user-defined information about the exception. (Inherited from Exception.)
	ErrorCode	Gets the HRESULT of the error. (Inherited from ExternalException.)
	HelpLink	Gets or sets a link to the help file associated with this exception. (Inherited from Exception.)
	HResult	Gets or sets HRESULT, a coded numerical value that is assigned to a specific exception. (Inherited from Exception.)
	InnerException	Gets the Exception instance that caused the current exception. (Inherited from Exception.)
	Message	Gets a message that describes the current exception. (Inherited from Exception.)
	Number	Gets a number that identifies the type of error.
	Source	Gets or sets the name of the application or the object that causes the error. (Inherited from Exception.)
	StackTrace	Gets a string representation of the immediate frames on the call stack. (Inherited from Exception.)
	TargetSite	Gets the method that throws the current exception. (Inherited from Exception.)

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Methods

	Name	Description
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetBaseException	When overridden in a derived class, returns the Exception that is the root cause of one or more subsequent exceptions. (Inherited from Exception.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetObjectData	When overridden in a derived class, sets the SerializationInfo with information about the exception. (Inherited from Exception.)
	GetType	Gets the runtime type of the current instance. (Inherited from Exception.)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	ToString	Returns a string that contains the HRESULT of the error. (Inherited from ExternalException.)

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Events

	Name	Description
	SerializeObjectState	Occurs when an exception is serialized to create an exception state object that contains serialized data about the exception. (Inherited from Exception.)

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Remarks

This class is created whenever the MySql Data Provider encounters an error generated from the server.

Any open connections are not automatically closed when an exception is thrown. If the client application determines that the exception is fatal, it should close any open MySqlDataReader objects or MySqlConnection objects.

Examples

The following example generates a MySqlException due to a missing server, and then displays the exception.

C++

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public void ShowException()
{
string mySelectQuery = "SELECT column1 FROM table1";
MySqlConnection myConnection =
new MySqlConnection("Data Source=localhost;Database=Sample;");
MySqlCommand myCommand = new MySqlCommand(mySelectQuery,myConnection);

try
{
myCommand.Connection.Open();
}
catch (MySqlException e)
{
MessageBox.Show( e.Message );
}
}

Public Sub ShowException()
Dim mySelectQuery As String = "SELECT column1 FROM table1"
Dim myConnection As New MySqlConnection ("Data Source=localhost;Database=Sample;")
Dim myCommand As New MySqlCommand(mySelectQuery, myConnection)

Try
myCommand.Connection.Open()
Catch e As MySqlException
MessageBox.Show( e.Message )
End Try
End Sub

No code example is currently available or this language may not be supported.

Reference

MySql.Data.MySqlClient Namespace

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