[英]How to overwrite nodes in an xml file?
我有以下XML文件:
<WindowEntries>
<WindowEntry>
<Name>maduranga</Name>
<View>TRN_UNIT</View>
<LU>TrnUnit</LU>
<DefaultWindowText />
<Flags>0</Flags>
</WindowEntry>
<WindowEntry>
<Name>tbwBrandOverView</Name>
<View>TRN_BRAND</View>
<LU>TrnBrand</LU>
<DefaultWindowText />
<Flags>0</Flags>
</WindowEntry>
<WindowEntries>
我為該xml開發了TreeView。 用戶從樹形視圖中選擇一個WindowEntry進行編輯后,以及用戶在條目中選擇一個條目值后,加載一些文本框進行編輯。 用戶完成編輯后,我將其保存。 保存后,xml文件如下所示:
<WindowEntries>
<WindowEntry>
<Name>maduranga</Name>
<View>maduranga</View>
<LU>maduranga</LU>
<Flags>maduranga</Flags>
</WindowEntry>
<WindowEntry>
<Name>tbwBrandOverView</Name>
<View>TRN_BRAND</View>
<LU>TrnBrand</LU>
<Flags>0</Flags>
</WindowEntry>
**<WindowEntry>
<Name>newvalue</Name>
<View>newvalue</View>
<LU>newvalue</LU>
<Flags>newvalue</Flags>
</WindowEntry>**
<WindowEntries>
但我想用“ newvalue”覆蓋“ madurang”值。 這是我用於該編輯的代碼。
XmlTextReader reader = new XmlTextReader("component.xml");
XmlDocument doc = new XmlDocument();
doc.Load(reader);
reader.Close();
XmlNode currNode;
XmlDocumentFragment docFrag = doc.CreateDocumentFragment();
try
{
string path3 = treeView1.SelectedNode.FullPath.ToString();
docFrag.InnerXml = "<WindowEntry>" +
"<Name>" + textBox7.Text + "</Name>" +
"<LU>" + textBox8.Text + "</LU>" +
"<View>" + textBox9.Text + "</View>" +
"<Flags>" + textBox10.Text + "</Flags>" +
"<OverrideDefaultHome>" + textBox11.Text + "</OverrideDefaultHome>" +
"<AssociatedHomepage>" + textBox12.Text + "</AssociatedHomepage>" +
"</WindowEntry>";
currNode = doc.SelectSingleNode("Component/WindowEntries");
currNode.AppendChild(docFrag);
doc.Save("component.xml");
}
Linq-XML簡單而強大。
filename = @"c:\path\sample.xml";
XDocument doc = XDocument.Load(filename);
var result = (from node in doc.Descendants("WindowEntry")
where node.Element("Name").Value == "maduranga"
select node.Element("Name")).ToList();
if(result.Count!=0)
result[0].Value = "NewValue";
doc.Save(filename);
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