X509Certificate.CreateFromCertFile メソッドとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

X509Certificate.CreateFromCertFile メソッド

指定した証明書ファイルから X.509v3 証明書を作成します。

名前空間: System.Security.Cryptography.X509Certificates
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

Public Shared Function CreateFromCertFile
 ( _
    filename As String _
) As X509Certificate

Visual Basic (使用法)

Dim filename As String
Dim returnValue As X509Certificate

returnValue = X509Certificate.CreateFromCertFile(filename)

public static X509Certificate CreateFromCertFile
 (
    string filename
)

C++

public:
static X509Certificate^ CreateFromCertFile (
    String^ filename
)

public static X509Certificate CreateFromCertFile
 (
    String filename
)

JScript

public static function CreateFromCertFile
 (
    filename : String
) : X509Certificate

パラメータ

filename: X.509 証明書の作成元の証明書ファイルのパス。

戻り値
新しく作成された X.509 証明書。

例外

例外の種類	条件
ArgumentException	filename パラメータが null 参照 (Visual Basic では Nothing) です。

解説

ASN.1 DER は、このクラスでサポートされている唯一の証明書の形式です。

使用例

Visual Basic

Imports System
Imports System.Security.Cryptography.X509Certificates




Public Class X509
   
   
   Public Shared Sub Main()
      
      ' The path to the certificate.
      Dim Certificate As String
 = "Certificate.cer"
      
      ' Load the certificate into an X509Certificate object.
      Dim cert As X509Certificate = X509Certificate.CreateFromCertFile(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 Class

using System;
using System.Security.Cryptography.X509Certificates;


public class X509
{

    public static void Main()
    {

        // The path to the certificate.
        string Certificate =  "Certificate.cer";

        // Load the certificate into an X509Certificate object.
        X509Certificate cert = X509Certificate.CreateFromCertFile(Certificate);

        // Get the value.
        string resultsTrue = cert.ToString(true);
       
        // Display the value to the console.
        Console.WriteLine(resultsTrue);

        // Get the value.
        string resultsFalse = cert.ToString(false);
       
        // Display the value to the console.
        Console.WriteLine(resultsFalse);
  
    }

}

C++

using namespace System;
using namespace System::Security::Cryptography::X509Certificates;
int main()
{
   
   // The path to the certificate.
   String^ Certificate = "Certificate.cer";
   
   // Load the certificate into an X509Certificate object.
   X509Certificate^ cert = X509Certificate::CreateFromCertFile( Certificate );
   
   // Get the value.
   String^ resultsTrue = cert->ToString( true );
   
   // Display the value to the console.
   Console::WriteLine( resultsTrue );
   
   // Get the value.
   String^ resultsFalse = cert->ToString( false );
   
   // Display the value to the console.
   Console::WriteLine( resultsFalse );
}

import System.*;
import System.Security.Cryptography.X509Certificates.*;

public class X509
{
    public static void main(String[]
 args)
    {
        // The path to the certificate.
        String certificate = "Certificate.cer";

        // Load the certificate into an X509Certificate object.
        X509Certificate cert = X509Certificate.CreateFromCertFile(certificate);

        // Get the value.
        String resultsTrue = cert.ToString(true);

        // Display the value to the console.
        Console.WriteLine(resultsTrue);

        // Get the value.
        String resultsFalse = cert.ToString(false);

        // Display the value to the console.
        Console.WriteLine(resultsFalse);
    } //main 
} //X509