CryptographicException Class
.NET Framework 2.0
The exception that is thrown when an error occurs during a cryptographic operation.
Namespace: System.Security.Cryptography
Assembly: mscorlib (in mscorlib.dll)
Assembly: mscorlib (in mscorlib.dll)
'Declaration <SerializableAttribute> _ <ComVisibleAttribute(True)> _ Public Class CryptographicException Inherits SystemException 'Usage Dim instance As CryptographicException
/** @attribute SerializableAttribute() */ /** @attribute ComVisibleAttribute(true) */ public class CryptographicException extends SystemException
SerializableAttribute ComVisibleAttribute(true) public class CryptographicException extends SystemException
The following code example demonstrates how to use members of the CryptographicException class.
Imports System Imports System.Text Imports System.Security.Cryptography Imports System.Runtime.Serialization Public Class Form1 Inherits System.Windows.Forms.Form ' Event handler for Run button. Private Sub Button1_Click( _ ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button1.Click tbxOutput.Cursor = Cursors.WaitCursor tbxOutput.Text = "" TestConstructors() ShowProperties() ' Reset the cursor and conclude application. tbxOutput.AppendText(vbCrLf + "This sample completed " + _ "successfully; Exit to continue.") tbxOutput.Cursor = Cursors.Default End Sub ' Test each public implementation of the CryptographicException ' constructors. Private Sub TestConstructors() EmptyConstructor() IntConstructor() StringConstructor() StringExceptionConstructor() StringStringConstructor() End Sub Private Sub EmptyConstructor() ' Construct a CryptographicException with no parameters. Dim cryptographicException As New CryptographicException WriteLine("Created an empty CryptographicException.") End Sub Private Sub IntConstructor() ' Construct a CryptographicException using the error code for an ' unexpected operation exception. Dim exceptionNumber As Integer = &H80131431 Dim cryptographicException As _ New CryptographicException(exceptionNumber) WriteLine("Created a CryptographicException with the " + _ "following error code: " + exceptionNumber.ToString()) End Sub Private Sub StringConstructor() ' Construct a CryptographicException using a custom error message. Dim errorMessage As String = "Unexpected Operation exception." Dim cryptographicException As New CryptographicException(errorMessage) WriteLine("Created a CryptographicException with the " + _ "following error message: " + errorMessage) End Sub Private Sub StringExceptionConstructor() ' Construct a CryptographicException using a custom error message ' and an inner exception. Dim errorMessage As String = "The current operation is not supported." Dim nullException As New NullReferenceException Dim cryptographicException As _ New CryptographicException(errorMessage, nullException) Write("Created a CryptographicException with the following error ") Write("message: " + errorMessage + " and the inner exception of ") WriteLine(nullException.ToString()) End Sub Private Sub StringStringConstructor() ' Create a CryptographicException using a time format and a the ' current date. Dim dateFormat As String = "{0:t}" Dim timeStamp As String = DateTime.Now.ToString() Dim cryptographicException As _ New CryptographicException(dateFormat, timeStamp) Write("Created a CryptographicException with (" + dateFormat) WriteLine(") as the format and (" + timeStamp + ") as the message.") End Sub ' Construct an invalid DSACryptoServiceProvider to throw a ' CryptographicException for introspection. Private Sub ShowProperties() Try ' Create a DSACryptoServiceProvider with invalid provider type ' code to throw a CryptographicException exception. Dim cspParams As New CspParameters(44) Dim DSAalg As New DSACryptoServiceProvider(cspParams) Catch ex As CryptographicException ' Retrieve the link to the help file for the exception. Dim helpLink As String = ex.HelpLink ' Retrieve the exception that caused the current ' CryptographicException exception. Dim innerException As System.Exception = ex.InnerException Dim innerExceptionMessage As String = "" If (Not innerException Is Nothing) Then innerExceptionMessage = innerException.ToString() End If ' Retrieve the message that describes the exception. Dim message As String = ex.Message ' Retrieve the name of the application that caused the exception. Dim exceptionSource As String = ex.Source ' Retrieve the call stack at the time the exception occured. Dim stackTrace As String = ex.StackTrace ' Retrieve the method that threw the exception. Dim targetSite As System.Reflection.MethodBase targetSite = ex.TargetSite Dim siteName As String = targetSite.Name ' Retrieve the entire exception as a single string. Dim entireException As String = ex.ToString() ' GetObjectData setSerializationInfo(ex) ' Get the root exception that caused the current ' CryptographicException exception. Dim baseException As System.Exception = ex.GetBaseException() Dim baseExceptionMessage As String = "" If (Not baseException Is Nothing) Then baseExceptionMessage = baseException.Message End If WriteLine("Caught an expected exception:") WriteLine(entireException) WriteLine(vbCrLf + "Properties of the exception are as follows:") WriteLine("Message: " + message) WriteLine("Source: " + exceptionSource) WriteLine("Stack trace: " + stackTrace) WriteLine("Help link: " + helpLink) WriteLine("Target site's name: " + siteName) WriteLine("Base exception message: " + baseExceptionMessage) WriteLine("Inner exception message: " + innerExceptionMessage) End Try End Sub Private Sub setSerializationInfo(ByRef ex As CryptographicException) ' Insert information about the exception into a serialized object. Dim formatConverter As New FormatterConverter Dim serializationInfo As _ New SerializationInfo(ex.GetType(), formatConverter) Dim streamingContext As _ New StreamingContext(StreamingContextStates.All) ex.GetObjectData(serializationInfo, streamingContext) End Sub ' Write specified message to the output textbox. Private Sub Write(ByVal message As String) tbxOutput.AppendText(message) End Sub ' Write specified message with a carriage return to the output textbox. Private Sub WriteLine(ByVal message As String) tbxOutput.AppendText(message + vbCrLf) End Sub ' Event handler for Exit button. Private Sub Button2_Click( _ ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button2.Click Application.Exit() End Sub #Region " Windows Form Designer generated code " Public Sub New() MyBase.New() 'This call is required by the Windows Form Designer. InitializeComponent() 'Add any initialization after the InitializeComponent() call End Sub 'Form overrides dispose to clean up the component list. Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) If disposing Then If Not (components Is Nothing) Then components.Dispose() End If End If MyBase.Dispose(disposing) End Sub 'Required by the Windows Form Designer Private components As System.ComponentModel.IContainer 'NOTE: The following procedure is required by the Windows Form Designer 'It can be modified using the Windows Form Designer. 'Do not modify it using the code editor. Friend WithEvents Panel2 As System.Windows.Forms.Panel Friend WithEvents Panel1 As System.Windows.Forms.Panel Friend WithEvents Button1 As System.Windows.Forms.Button Friend WithEvents Button2 As System.Windows.Forms.Button Friend WithEvents tbxOutput As System.Windows.Forms.RichTextBox <System.Diagnostics.DebuggerStepThrough()> _ Private Sub InitializeComponent() Me.Panel2 = New System.Windows.Forms.Panel Me.Button1 = New System.Windows.Forms.Button Me.Button2 = New System.Windows.Forms.Button Me.Panel1 = New System.Windows.Forms.Panel Me.tbxOutput = New System.Windows.Forms.RichTextBox Me.Panel2.SuspendLayout() Me.Panel1.SuspendLayout() Me.SuspendLayout() ' 'Panel2 ' Me.Panel2.Controls.Add(Me.Button1) Me.Panel2.Controls.Add(Me.Button2) Me.Panel2.Dock = System.Windows.Forms.DockStyle.Bottom Me.Panel2.DockPadding.All = 20 Me.Panel2.Location = New System.Drawing.Point(0, 320) Me.Panel2.Name = "Panel2" Me.Panel2.Size = New System.Drawing.Size(616, 64) Me.Panel2.TabIndex = 1 ' 'Button1 ' Me.Button1.Dock = System.Windows.Forms.DockStyle.Right Me.Button1.Font = New System.Drawing.Font( _ "Microsoft Sans Serif", _ 9.0!, _ System.Drawing.FontStyle.Regular, _ System.Drawing.GraphicsUnit.Point, _ CType(0, Byte)) Me.Button1.Location = New System.Drawing.Point(446, 20) Me.Button1.Name = "Button1" Me.Button1.Size = New System.Drawing.Size(75, 24) Me.Button1.TabIndex = 2 Me.Button1.Text = "&Run" ' 'Button2 ' Me.Button2.Dock = System.Windows.Forms.DockStyle.Right Me.Button2.Font = New System.Drawing.Font( _ "Microsoft Sans Serif", _ 9.0!, _ System.Drawing.FontStyle.Regular, _ System.Drawing.GraphicsUnit.Point, _ CType(0, Byte)) Me.Button2.Location = New System.Drawing.Point(521, 20) Me.Button2.Name = "Button2" Me.Button2.Size = New System.Drawing.Size(75, 24) Me.Button2.TabIndex = 3 Me.Button2.Text = "E&xit" ' 'Panel1 ' Me.Panel1.Controls.Add(Me.tbxOutput) Me.Panel1.Dock = System.Windows.Forms.DockStyle.Fill Me.Panel1.DockPadding.All = 20 Me.Panel1.Location = New System.Drawing.Point(0, 0) Me.Panel1.Name = "Panel1" Me.Panel1.Size = New System.Drawing.Size(616, 320) Me.Panel1.TabIndex = 2 ' 'tbxOutput ' Me.tbxOutput.AccessibleDescription = _ "Displays output from application." Me.tbxOutput.AccessibleName = "Output textbox." Me.tbxOutput.Dock = System.Windows.Forms.DockStyle.Fill Me.tbxOutput.Location = New System.Drawing.Point(20, 20) Me.tbxOutput.Name = "tbxOutput" Me.tbxOutput.Size = New System.Drawing.Size(576, 280) Me.tbxOutput.TabIndex = 1 Me.tbxOutput.Text = "Click the Run button to run the application." ' 'Form1 ' Me.AutoScaleBaseSize = New System.Drawing.Size(6, 15) Me.ClientSize = New System.Drawing.Size(616, 384) Me.Controls.Add(Me.Panel1) Me.Controls.Add(Me.Panel2) Me.Name = "Form1" Me.Text = "CryptographicException" Me.Panel2.ResumeLayout(False) Me.Panel1.ResumeLayout(False) Me.ResumeLayout(False) End Sub #End Region End Class ' ' This sample produces the following output: ' ' Created an empty CryptographicException. ' Created a CryptographicException with the following error code: -2146233295 ' Created a CryptographicException with the following error message: ' Unexpected Operation exception. ' Created a CryptographicException with the following error message: ' The current operation is not supported. and the inner exception of ' System.NullReferenceException: Object reference not set to an instance of an ' object. ' Created a CryptographicException with ({0:t}) as the format and (2/24/2004 ' 2:19:32 PM) as the message. ' Caught an expected exception: ' System.Security.Cryptography.CryptographicException: CryptoAPI cryptographic ' service provider (CSP) for this implementation could not be acquired. ' at System.Security.Cryptography.DSACryptoServiceProvider..ctor( ' Int32 dwKeySize, CspParameters parameters) ' at System.Security.Cryptography.DSACryptoServiceProvider..ctor( ' CspParameters parameters) ' at WindowsApplication1.Form1.ShowProperties() in ' C:\WindowsApplication1\Form1.vb:line 103 ' ' Properties of the exception are as follows: ' Message: CryptoAPI cryptographic service provider (CSP) for this ' implementation could not be acquired. ' Source: mscorlib ' Stack trace: at System.Security.Cryptography.DSACryptoServiceProvider.. ' ctor(Int32 dwKeySize, CspParameters parameters) ' at System.Security.Cryptography.DSACryptoServiceProvider..ctor( ' CspParameters parameters) ' at WindowsApplication1.Form1.ShowProperties() in ' C:\WindowsApplication1\Form1.vb:line 103 ' Help link: ' Target site's name: .ctor ' Base exception message: CryptoAPI cryptographic service provider (CSP) for ' this implementation could not be acquired. ' Inner exception message: ' ' This sample completed successfully; Exit to continue
System.Object
System.Exception
System.SystemException
System.Security.Cryptography.CryptographicException
System.Security.Cryptography.CryptographicUnexpectedOperationException
System.Exception
System.SystemException
System.Security.Cryptography.CryptographicException
System.Security.Cryptography.CryptographicUnexpectedOperationException
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.
Community Additions
ADD
Show: