SignedXml.LoadXml(XmlElement) 方法

定义

命名空间:

System.Security.Cryptography.Xml

程序集:

System.Security.Cryptography.Xml.dll

包:

System.Security.Cryptography.Xml v9.0.0-preview.6.24327.7

Source:

SignedXml.cs

从 XML 元素加载 SignedXml 状态。

public:
 void LoadXml(System::Xml::XmlElement ^ value);

public void LoadXml (System.Xml.XmlElement value);

member this.LoadXml : System.Xml.XmlElement -> unit

Public Sub LoadXml (value As XmlElement)

参数

value

XmlElement

要从其加载 SignedXml 状态的 XML 元素。

例外

ArgumentNullException

value 参数为 null。

CryptographicException

value 参数不包含有效的 SignatureValue 属性。

- 或 -

value 参数不包含有效的 SignedInfo 属性。

示例

下面的代码示例演示如何使用 LoadXml 方法来验证 XML 文档。

// Verify the signature of an XML file and return the result.
Boolean VerifyDetachedSignature( String^ XmlSigFileName )
{
   
   // Create a new XML document.
   XmlDocument^ xmlDocument = gcnew XmlDocument;
   
   // Load the passed XML file into the document.
   xmlDocument->Load( XmlSigFileName );
   
   // Create a new SignedXMl object.
   SignedXml^ signedXml = gcnew SignedXml;
   
   // Find the "Signature" node and create a new
   // XmlNodeList object.
   XmlNodeList^ nodeList = xmlDocument->GetElementsByTagName( "Signature" );
   
   // Load the signature node.
   signedXml->LoadXml( safe_cast<XmlElement^>(nodeList->Item( 0 )) );
   
   // Check the signature and return the result.
   return signedXml->CheckSignature();
}

// Verify the signature of an XML file and return the result.
public static Boolean VerifyDetachedSignature(string XmlSigFileName)
{	
    // Create a new XML document.
    XmlDocument xmlDocument = new XmlDocument();

    // Load the passed XML file into the document.
    xmlDocument.Load(XmlSigFileName);

    // Create a new SignedXMl object.
    SignedXml signedXml = new SignedXml();

    // Find the "Signature" node and create a new
    // XmlNodeList object.
    XmlNodeList nodeList = xmlDocument.GetElementsByTagName("Signature");

    // Load the signature node.
    signedXml.LoadXml((XmlElement)nodeList[0]);

    // Check the signature and return the result.
    return signedXml.CheckSignature();
}

' Verify the signature of an XML file and return the result.
Public Shared Function VerifyDetachedSignature(XmlSigFileName As String) As [Boolean]
   ' Create a new XML document.
   Dim xmlDocument As New XmlDocument()
   
   ' Load the passed XML file into the document.
   xmlDocument.Load(XmlSigFileName)
   
   ' Create a new SignedXMl object.
   Dim signedXml As New SignedXml()
   
   ' Find the "Signature" node and create a new
   ' XmlNodeList object.
   Dim nodeList As XmlNodeList = xmlDocument.GetElementsByTagName("Signature")
   
   ' Load the signature node.
   signedXml.LoadXml(CType(nodeList(0), XmlElement))
   
   ' Check the signature and return the result.
   Return signedXml.CheckSignature()
End Function