[英]Read and Write XML in C# using Linq
我想通過代碼閱讀和編輯xml文件。 如何使用XML和Linq實現此目的? 請幫忙,我的xml編碼技能不好。
我想獲取名稱為 “ new_test”的實體並讀取/編輯該節點中的RibbonDiffXml內容。
XML示例:
<ImportExportXml xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<Entities>
<Entity>
<Name LocalizedName="test" OriginalName="test">new_test</Name>
<EntityInfo>...</EntityInfo>
..
<RibbonDiffXml>..</RibbonDiffXml>
..
</Entity>
<Entity>
<Name LocalizedName="Account" OriginalName="Account">account</Name>
<EntityInfo>..</EntityInfo>
...
</Entity>
</Entities>
</ImportExportXml>
string xml = @"<CustomActions>
<CustomAction Id='MsCrm.deal.Form.Clone.CustomAction' Location='Mscrm.Form.deal.MainTab.Save.Controls._children' Sequence='46'>
<CommandUIDefinition>
<Button Alt='$LocLabels:MsCrm.deal.Form.Clone.Alt' Command='MsCrm.deal.CloneCommand' Id='MsCrm.deal.Form.Clone' Image32by32='$webresource:new_/image/clone32.png' Image16by16='$webresource:new_/image/clone16.png' LabelText='$LocLabels:MsCrm.deal.Form.Clone.LabelText' Sequence='46' TemplateAlias='o1' ToolTipTitle='$LocLabels:MsCrm.deal.Form.Clone.ToolTipTitle' ToolTipDescription='$LocLabels:MsCrm.deal.Form.Clone.ToolTipDescription' />
</CommandUIDefinition>
</CustomAction>
</CustomActions>";
var ribbon = from entity in document.Root.Element("Entities").Elements()
where entity.Element("Name") != null && entity.Element("Name").Value == entityName
select entity.Element("RibbonDiffXml");
var action = ribbon.Elements("CustomActions").ToList();
action.Add(XElement.Parse(xml));
document.Save(filePath);
我已經嘗試過類似的操作,但它不會將更改保存到文件中。 但是,如果我使用action.Remove(),則更改將保存為確定。 我做錯了什么? 如何將元素添加到RibbonDiffXml元素並保存?
我將您的xml放入資源中,並使用以下代碼從名稱為'new_test'的Entity-Element中獲取RibbonDiffXml-Element。
XDocument document = XDocument.Parse(Properties.Resources.XML);
if (document.Root != null)
{
IEnumerable<string> elements =
(from entity in document.Root.Element("Entities").Elements()
let name = entity.Element("Name")
where name != null && name.Value == "new_test"
let ribbonDiffXml = entity.Element("RibbonDiffXml")
where ribbonDiffXml != null
select ribbonDiffXml.Value);
}
要更新XML,可以使用:
foreach (XElement ribbonDiffXml in from entity in document.Root.Element("Entities").Elements()
let name = entity.Element("Name")
where name != null && name.Value == "new_test"
select entity.Element("RibbonDiffXml")
into ribbonDiffXml
where ribbonDiffXml != null select ribbonDiffXml)
{
ribbonDiffXml.Value = "Changed RibbonDiffXml";
}
要保存更改,您必須致電:
document.Save("PATH OR STREAM OR ...");
我測試了一下,它起作用了
String s = @"<ImportExportXml><Entities><Entity><Name>new_test</Name><EntityInfo></EntityInfo><RibbonDiffXml></RibbonDiffXml></Entity></Entities></ImportExportXml>";
var xdoc = XElement.Parse(s);
var f = (from x in xdoc.DescendantsAndSelf(@"Entities")
where x.Element("Entity").Element("Name").Value == "new_test"
select x.Element("Entity").Element("RibbonDiffXml"));
foreach(var y in f)
{
y.Value = "Hello World";
}
您需要保存xdoc。
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