[英]Removing digital Signature tags from an xml file
i need to know how the digital signature tags can be removed. 我需要知道如何删除数字签名标签。 its a enveloped digital signature 其封装的数字签名
my xml file looks like the following 我的xml文件如下所示
<?xml version="1.0" encoding="utf-8" ?>
<questionset>
<question category="graph" />
<Signature xmlns="http://www.w3.org/2000/09/xmldsig#">
<SignedInfo>
</SignedInfo>
</Signature>
</questionset>
i tried somethings 我尝试了一些东西
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.PreserveWhitespace = false;
xmlDoc.Load(new XmlTextReader(Doc));
XmlNode rnode = xmlDoc.SelectSingleNode("questionset/Signature");
XmlNode parent = rnode.ParentNode;
parent.RemoveChild(rnode);
string newXML = xmlDoc.OuterXml;
XmlTextWriter xmlWriter = new XmlTextWriter(filename2, new UTF8Encoding(false));
xmlDoc.WriteTo(xmlWriter);
xmlWriter.Close();
but rnode returned null value.. 但是rnode返回空值。
and i tried using Linq 我尝试使用Linq
XElement document = XElement.Load(Doc);
XElement signElement = document.Descendants("Signature").FirstOrDefault<XElement>();
signElement.Remove();
here also signElement returned null value.. so both didnt work.can someone tell me where i went wrong or can you tell me the right approach to remove the digital signature. 在这里signElement也返回了null值..所以两者都没有用。有人可以告诉我我哪里出了问题,还是可以告诉我删除数字签名的正确方法。
XElement document = XElement.Load(Doc);
IEnumerable<XElement> signElements = document.Descendants("questionSet").Elements("Signature");
will get you the elements you wish to remove. 将为您提供您要删除的元素。 In this case, "Signature"
. 在这种情况下,为"Signature"
。
then call Remove()
然后调用Remove()
document.Descendants("questionSet").Elements("Signature").Remove();
then save the xml back to a file if required; 然后根据需要将xml保存回文件;
doc.Save("output.xml");
See MSDN Remove() for more detail. 有关更多详细信息,请参见MSDN Remove() 。
Further, your LINQ to XML query 此外,您的LINQ to XML查询
XElement signElement = document.Descendants("Signature").FirstOrDefault<XElement>();
would have gotten the descendants/children of "Signature" and then returned the first item in the collection. 会得到“签名”的后代/孩子,然后返回集合中的第一项。 So you would have gotten the first "SignedInfo" node. 因此,您将获得第一个“ SignedInfo”节点。
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