删除XML 中的一行数据
0
悬赏园豆：10
[已解决问题]
解决于 2012-12-13 15:58
运行后生成的XML 文件格式如下
<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<Files version="0.1">
<File Name="kk" extension=".dwg" Location="" Guid="16634fe4-9986-4285-a3af-5c6d1cc10fec" version="0.1">
<SubFiles>
<File Name="jj" extension=".dwf" Location="\kk" Guid="d249ba4f-eeaa-4a2a-a503-00e98d7c6ef7" version="0.1">
<SubFiles>
<File Name="jj" extension=".jpg" Location="\kk" Guid="a182ace6-261e-411e-8930-17f0a65086b9" version="0.1" />
</SubFiles>
</File>
</SubFiles>
</File>
</Files>
现在我要删除XML文件中 extension=.dwf的所有行该怎么实现。
下面是本人写的代码貌似出现了问题，请高人指点，能给出源码非常的感激。
private void delete()
{
// 创建一个XmlDocument类的对象
XmlDocument xmlDoc = new XmlDocument();
// 把你想要读取的xml文档加载进来
xmlDoc.Load("xmlfile.xml");
// 读取你指定的节点
XmlNodeList xnl = xmlDoc.SelectSingleNode("SubFiles").ChildNodes;
foreach (XmlNode xn in xnl)
{
XmlElement xe = (XmlElement)xn;
if (xe.GetAttribute("Extention")==".dwf")
{
xe.RemoveAll();
}
}
xmlDoc.Save("xmlfile.xml");
}
问题补充：
写的更新的函数
public void Save(string xmlfile)
{
// Prevent the version is (0,0) that is considered as invalid file version for clients.
if(this.ConfigVersion.Major == 0 && this.ConfigVersion.Minor == 0)
{
this.ConfigVersion = new Version(0, 1);
}
XmlTextWriter xmlWriter = new XmlTextWriter(xmlfile, Encoding.UTF8);
xmlWriter.WriteStartDocument(true);
xmlWriter.WriteStartElement("Files");
xmlWriter.WriteStartAttribute("version");
xmlWriter.WriteString(m_version.ToString());
xmlWriter.WriteEndAttribute();
foreach (IInvFileInfo file in this)
{
// The sub files should be skipped in this case and will be handled in the next for each.
if (file.Extension.Equals(".idw") || file.Extension.Equals(".dwg"))
{
xmlWriter.WriteStartElement("File");
SaveInventorFileAttributesIntoXml(xmlWriter, file);
if (file.RefFiles != null && file.RefFiles.Count > 0)
{
xmlWriter.WriteStartElement("SubFiles");
foreach (IInvFileInfo sub in file.RefFiles)
{
xmlWriter.WriteStartElement("File");
SaveInventorFileAttributesIntoXml(xmlWriter, sub);
//symbol text info
if (sub.SymbolTextInfo != null && sub.SymbolTextInfo.IsInstanced && sub.SymbolTextInfo.IsPromptedSymbol)
{
xmlWriter.WriteStartElement("SymbolTextInfo");
xmlWriter.
最佳答案
0
protected void Page_Load(object sender, EventArgs e)
{
string filepath = Server.MapPath(".") + "\\XMLFile.xml";
XmlDocument document = new XmlDocument();
document.Load(filepath);
XmlNodeList list = document.GetElementsByTagName("File");
for (int i = list.Count - 1; i >= 0; i--)
{
XmlNode node = list[i];
if (node.Attributes["extension"].Value.Equals(".dwf"))
{
node.ParentNode.RemoveChild(node);
}
}
this.txt.Text = document.DocumentElement.OuterXml;
}
这样不知道行不行.~
收获园豆：4
你哪个txt 是什么
是页面上的一个textbox
其他回答(2)
0
有两处需改一下：
XmlNodeList xnl = xmlDoc.SelectSingleNode("//Files//File//SubFiles").ChildNodes;
//…………………………
if (xe.GetAttribute("extension") == ".dwf")
收获园豆：4
删不了呀
@cici.fan:
是否没有操作文件权限?我已经删除了！
嗯，删除了，但是节点没有删。你能不能帮我一个忙
0
使用XPATH来查找具有这样属性的节点
//查找属性extension='.dwg'的所有节点
XmlNodeList xnl = xmlDoc.SelectNodes("//*[@extension='.dwg']");
//同样：查找属性extension='.dwg'的file节点 //file[@extension='.dwg']
foreach (XmlNode xn in xnl)
{
try
{
xmlDoc.RemoveChild(xn);//从XML中移除当前节点（包括子节点）
}
catch
{
//可能出现当前节点为前某个被移除节点的子节点
continue;
}
}
收获园豆：2
private void Load(string xmlfile)//获取XML 中的数据
{
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(xmlfile);
XmlNode root = xmlDoc.SelectSingleNode("Files");
if (root != null)
{
XmlNode attri = root.Attributes.GetNamedItem("version");
if (attri != null)
{
m_version = new Version(attri.Value);
}
XmlNodeList fileList = root.SelectNodes("File");
foreach (XmlNode node in fileList)
{
IInvFileInfo file = CreateInventorFileByXmlNode(node);
XmlNode subroot = node.SelectSingleNode("SubFiles");
if (subroot != null)
{
XmlNodeList subFileList = subroot.SelectNodes("File");
//sub files node
List<IInvFileInfo> subFiles = new List<IInvFileInfo>();
foreach (XmlNode subNode in subFileList) //Inv File
{
//sub file node
IInvFileInfo subFile = CreateInventorFileByXmlNode(subNode);
XmlNode thumbnailNode = subNode.SelectSingleNode("SubFiles");//thumbnail
if (thumbnailNode != null)
{
XmlNode thumbnailFileNode = thumbnailNode.SelectSingleNode("File");
if (thumbnailFileNode != null)
{
IInvFileInfo thnFile = CreateInventorFileByXmlNode(thumbnailFileNode);
files.Add(thnFile.Guid, thnFile);
subFile.RefFiles = new List<IInvFi
