X509Certificate.Import Method (String)

 
System_CAPS_noteNote

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Populates the X509Certificate object with information from a certificate file.

Namespace:   System.Security.Cryptography.X509Certificates
Assembly:  mscorlib (in mscorlib.dll)

<SecurityCriticalAttribute>
<ComVisibleAttribute(False)>
<PermissionSetAttribute(SecurityAction.InheritanceDemand, Unrestricted := True)>
Public Overridable Sub Import (
	fileName As String
)

Parameters

fileName
Type: System.String

The name of a certificate file represented as a string.

Exception Condition
ArgumentException

The fileName parameter is null.

This method uses a certificate file (such as a file with a .cer extension) that represents an X.509 certificate, and populates the X509Certificate object with the certificate that the file contains.

The following example loads an X.509 certificate from a file, calls the ToString method, and displays the results to the console.

Imports System
Imports System.Security.Cryptography.X509Certificates

Module X509

    Sub Main()

        ' The path to the certificate.
        Dim Certificate As String = "Certificate.cer"

        ' Load the certificate into an X509Certificate object.
        Dim cert As New X509Certificate

        cert.Import(Certificate)

        ' Get the value.
        Dim resultsTrue As String = cert.ToString(True)

        ' Display the value to the console.
        Console.WriteLine(resultsTrue)

        ' Get the value.
        Dim resultsFalse As String = cert.ToString(False)

        ' Display the value to the console.
        Console.WriteLine(resultsFalse)

    End Sub
End Module

SecurityCriticalAttribute

requires full trust for the immediate caller. This class cannot be used by partially trusted or transparent code.

InheritanceDemand

for full trust for inheritors. This member cannot be inherited by partially trusted code.

FileIOPermission

for permission to read the file described by the fileName parameter. Security action: Demand. Associated enumeration: EnvironmentPermissionAccess.Read

KeyContainerPermission

for permission to create a key container. Security action: Demand. Associated enumeration: KeyContainerPermissionFlags.Create

.NET Framework
Available since 2.0
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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