本文整理汇总了VB.NET中System.Security.Cryptography.Xml.SignedXml.XmlDsigXPathTransformUrl字段的典型用法代码示例。如果您正苦于以下问题:VB.NET SignedXml.XmlDsigXPathTransformUrl字段的具体用法?VB.NET SignedXml.XmlDsigXPathTransformUrl怎么用?VB.NET SignedXml.XmlDsigXPathTransformUrl使用的例子?那么, 这里精选的字段代码示例或许可以为您提供帮助。您也可以进一步了解该字段所在类System.Security.Cryptography.Xml.SignedXml
的用法示例。
在下文中一共展示了SignedXml.XmlDsigXPathTransformUrl字段的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: Class1
' 导入命名空间
Imports System.IO
Imports System.Xml
Imports System.Security.Cryptography
Imports System.Security.Cryptography.Xml
Class Class1
<STAThread()> _
Shared Sub Main(ByVal args() As String)
' Encrypt a sample XML string.
Dim productsXml As XmlDocument = LoadProducts()
ShowTransformProperties(productsXml)
' Encrypt an XPath Xml string.
Dim transformXml As XmlDocument = LoadTransformByXml()
ShowTransformProperties(transformXml)
' Use XmlDsigXPathTransform to resolve a Uri.
Dim baseUri As New Uri("http://www.contoso.com")
Dim relativeUri As String = "xml"
Dim absoluteUri As Uri = ResolveUris(baseUri, relativeUri)
Console.WriteLine("This sample completed successfully; " + "press Enter to exit.")
Console.ReadLine()
End Sub
' Encrypt the text in the specified XmlDocument.
Private Shared Sub ShowTransformProperties(ByVal xmlDoc As XmlDocument)
' Create a new XMLDocument object.
Dim doc As New XmlDocument()
' Create a new XmlElement.
Dim xPathElem As XmlElement = doc.CreateElement("XPath")
' Set the element text to the value
' of the XPath string.
xPathElem.InnerText = "ancestor-or-self::PRODUCTS"
' Create a new XmlDsigXPathTransform object.
Dim xmlTransform As New XmlDsigXPathTransform()
' Load the XPath XML from the element.
xmlTransform.LoadInnerXml(xPathElem.SelectNodes("."))
' Ensure the transform is using the proper algorithm.
xmlTransform.Algorithm = SignedXml.XmlDsigXPathTransformUrl
' Retrieve the XML representation of the current transform.
Dim xmlInTransform As XmlElement = xmlTransform.GetXml()
Console.WriteLine(vbLf + "Xml representation of the current transform: ")
Console.WriteLine(xmlInTransform.OuterXml)
' Retrieve the valid input types for the current transform.
Dim validInTypes As Type() = xmlTransform.InputTypes
' Verify the xmlTransform can accept the XMLDocument as an
' input type.
Dim i As Integer
For i = 0 To validInTypes.Length
If validInTypes(i).Equals(xmlDoc.GetType()) Then
' Load the document into the transfrom.
xmlTransform.LoadInput(xmlDoc)
Try
' This transform is created for demonstration purposes.
Dim secondTransform As New XmlDsigXPathTransform()
Dim classDescription As String = secondTransform.ToString()
xmlTransform.LoadInnerXml(xPathElem.SelectNodes("."))
Catch
Console.WriteLine("Caught exception while trying to " + "load the specified Xml document. The document " + "requires an XPath element to be valid.")
End Try
Exit For
End If
Next i
Dim validOutTypes As Type() = xmlTransform.OutputTypes
For i = validOutTypes.Length - 1 To 0 Step -1
If validOutTypes(i).Equals(GetType(System.Xml.XmlDocument)) Then
Try
Dim xmlDocumentType As Type = GetType(System.Xml.XmlDocument)
Dim xmlDocumentOutput As XmlDocument = CType(xmlTransform.GetOutput(xmlDocumentType), XmlDocument)
' Display to the console the Xml before and after
' encryption.
Console.WriteLine("Result of the GetOutput method call" + " from the current transform: " + xmlDocumentOutput.OuterXml)
Catch ex As Exception
Console.WriteLine("Unexpected exception caught: " + ex.ToString())
End Try
Exit For
ElseIf validOutTypes(i).Equals(GetType(System.Xml.XmlNodeList)) Then
Try
Dim xmlNodeListType As Type = GetType(System.Xml.XmlNodeList)
Dim xmlNodes As XmlNodeList = CType(xmlTransform.GetOutput(xmlNodeListType), XmlNodeList)
' Display to the console the Xml before and after
' encryption.
Console.WriteLine("Encoding the following message: " + xmlDoc.InnerText)
Console.WriteLine("Nodes of the XmlNodeList retrieved " + "from GetOutput:")
For j As Integer = 0 To xmlNodes.Count - 1
Console.WriteLine("Node " + j + " has the following name: " + xmlNodes.Item(j).Name + " and the following InnerXml: " + xmlNodes.Item(j).InnerXml)
Next
Catch ex As Exception
Console.WriteLine("Unexpected exception caught: " + ex.ToString())
End Try
Exit For
Else
Dim outputObject As Object = xmlTransform.GetOutput()
End If
Next i
End Sub
' Create an XML document for the dsig namespace.
Private Shared Function LoadTransformByXml() As XmlDocument
Dim xmlDoc As New XmlDocument()
Dim transformXml As String = "<Signature><Reference URI=''><Transforms>"
transformXml += "<Transform><XPath "
transformXml += "xmlns:dsig='http://www.w3.org/2000/09/xmldsig#'>"
transformXml += "not(ancestor-or-self::dsig:Signature)"
transformXml += "</XPath></Transform>"
transformXml += "</Transforms></Reference></Signature>"
xmlDoc.LoadXml(transformXml)
Return xmlDoc
End Function 'LoadTransformByXml
' Create an XML document describing various products.
Private Shared Function LoadProducts() As XmlDocument
Dim xmlDoc As New XmlDocument()
Dim contosoProducts As String = "<PRODUCTS>"
contosoProducts += "<PRODUCT><ID>123</ID>"
contosoProducts += "<DESCRIPTION>Router</DESCRIPTION></PRODUCT>"
contosoProducts += "<PRODUCT><ID>456</ID>"
contosoProducts += "<DESCRIPTION>Keyboard</DESCRIPTION></PRODUCT>"
contosoProducts += "<PRODUCT><ID>789</ID>"
contosoProducts += "<DESCRIPTION>Monitor</DESCRIPTION></PRODUCT>"
contosoProducts += "</PRODUCTS>"
xmlDoc.LoadXml(contosoProducts)
Return xmlDoc
End Function 'LoadProducts
' Resolve the specified base and relative Uri's .
Private Shared Function ResolveUris(ByVal baseUri As Uri, ByVal relativeUri As String) As Uri
Dim xmlResolver As New XmlUrlResolver()
xmlResolver.Credentials = System.Net.CredentialCache.DefaultCredentials
Dim xmlTransform As New XmlDsigXPathTransform()
xmlTransform.Resolver = xmlResolver
Dim absoluteUri As Uri = xmlResolver.ResolveUri(baseUri, relativeUri)
If Not (absoluteUri Is Nothing) Then
Console.WriteLine(vbLf + "Resolved the base Uri and relative Uri to the following:")
Console.WriteLine(absoluteUri.ToString())
Else
Console.WriteLine("Unable to resolve the base Uri and relative Uri")
End If
Return absoluteUri
End Function
End Class
开发者ID:VB.NET开发者,项目名称:System.Security.Cryptography.Xml,代码行数:172,代码来源:SignedXml.XmlDsigXPathTransformUrl