usingSystem;
usingSystem.Collections.Generic;
usingSystem.Linq;
usingSystem.Transactions;
usingSystem.Xml.Linq;
usingSystem.Xml.XPath;
usingXmlDAL.Interface;
 
namespaceXmlDAL.DefaultImplementation
{
///<summary>
///passworkingnodeparentandpathandworkingnode
///e.g.wanttoworkingwithconfig/menu/menuItem:
///parentpathshouldbe./menu
///workingnodeismenuItem
///</summary>
publicclassXmlOperation:IXmlOperation
{
privatereadonlyXDocument_document;
privatereadonlystring_path;
privatereadonlyXElement_rootElement;
privatereadonlystring_workingNodeParentPath;
privatereadonlystring_workingNode;
publicXmlOperation(stringfilePath,stringworkingNodeParentPath,stringworkingNode)
{
_path=filePath;
_document=XDocument.Load(filePath);
_rootElement=_document.Root;
_workingNodeParentPath=workingNodeParentPath;
_workingNode=workingNode;
}
 
publicIXmlOperationSaveElement(XElementelement)
{
 
varret=
_rootElement.XPathSelectElements(_workingNodeParentPath)
.First()
.Descendants(_workingNode)
.Where(e=>e.Attribute("id").Value==element.Attribute("id").Value);
 
if(!ret.Any())
returnthis;
 
using(varscope=newTransactionScope())
{
ret.Remove();
_rootElement.XPathSelectElements(_workingNodeParentPath).First().Add(element);
_rootElement.Save(_path);
scope.Complete();
}
 
returnthis;
}
 
publicXDocumentDocument
{
get{return_document;}
}
 
publicIXmlOperationAppendToLast(XElementelement)
{
using(varscope=newTransactionScope())
{
_rootElement.XPathSelectElements(_workingNodeParentPath).First().Add(element);
_rootElement.Save(_path);
scope.Complete();
}
 
returnthis;
}
 
publicIXmlOperationRemoveWhere(Func<XElement,bool>condition)
{
varret=_rootElement.XPathSelectElements(_workingNodeParentPath).First().Descendants(_workingNode).Where(condition);
if(!ret.Any())
returnthis;
using(varscope=newTransactionScope())
{
ret.Remove();
_rootElement.Save(_path);
scope.Complete();
}
returnthis;
}
 
publicIEnumerable<XElement>SearchBy(Func<XElement,bool>condition)
{
return_rootElement.XPathSelectElements(_workingNodeParentPath).First().Descendants(_workingNode).Where(condition);
}
 
}
}

Usage :

@H_301_434@usingSystem; usingSystem.Collections.Generic; usingSystem.Linq; usingSystem.Linq.Expressions; usingSystem.Reflection; usingSystem.Transactions; usingCommon.Constant; usingWorkTrackerBC.Interface.WorkItem; usingXmlDAL.DefaultImplementation; usingXmlDAL.Interface; usingSystem.Xml.Linq; usingCommon.Helper; usingEntity.Business; usingSystem.Collections.ObjectModel; namespaceWorkTrackerBC.DefaultImplementation.WorkItem { publicclassWorkItemDomainModel:IWorkItemOperation { privatereadonlyIXmlOperation_xmlOperation; publicWorkItemDomainModel() { //hereacceptxPathtoindicateworkingpath _xmlOperation=newXmlOperation(ConfigurationConst.XmlPathWorkTracker,".","workItem"); } publicObservableCollection<Entity.Business.WorkItem>AppendWorkItem(Entity.Business.WorkItemitem) { varnewElement=WorkItemToElement(item); _xmlOperation.AppendToLast(newElement); returnAll(); } publicObservableCollection<Entity.Business.WorkItem>All() { returnnewObservableCollection<Entity.Business.WorkItem>(_xmlOperation.SearchBy(e=>true).Select(ElementToWorkItem)); } publicObservableCollection<Entity.Business.WorkItem>Where(Expression<Func<Entity.Business.WorkItem,bool>>whereExp) { returnnewObservableCollection<Entity.Business.WorkItem>(All().Where(whereExp.Compile())); } publicIWorkItemOperationUpdateItemById(GuidoldItemId,Entity.Business.WorkItemnewItem) { varnewElement=WorkItemToElement(newItem); if(!_xmlOperation.SearchBy(e=>newGuid(e.Attribute("id").Value)==oldItemId).Any()) returnthis; using(vartransaction=newTransactionScope(TransactionScopeOption.required,TimeSpan.FromMinutes(1))) { _xmlOperation.RemoveWhere(e=>newGuid(e.Attribute("id").Value)==oldItemId); _xmlOperation.AppendToLast(newElement); transaction.Complete(); } returnthis; } publicIWorkItemOperationRemoveById(Guidid) { _xmlOperation.RemoveWhere(e=>newGuid(e.Attribute("id").Value)==id); returnthis; } publicIWorkItemOperationMarkAsDone(Guidid) { varelement=_xmlOperation.SearchBy(e=>newGuid(e.Attribute("id").Value)==id).First(); element.Attribute("isFinished").SetValue(Boolean.TrueString); _xmlOperation.SaveElement(element); returnthis; } publicIWorkItemOperationMarkAsToDo(Guidid) { varelement=_xmlOperation.SearchBy(e=>newGuid(e.Attribute("id").Value)==id).First(); element.Attribute("isFinished").SetValue(Boolean.FalseString); _xmlOperation.SaveElement(element); returnthis; } publicObservableCollection<Entity.Business.WorkItem>GetToDoListBy(Func<Entity.Business.WorkItem,bool>exp) { vartodoAll=GetToDoListAll(); returnnewObservableCollection<Entity.Business.WorkItem>(todoAll.Where(exp)); } publicObservableCollection<Entity.Business.WorkItem>GetToDoListAll() { returnnewObservableCollection<Entity.Business.WorkItem>(_xmlOperation.SearchBy(e=>e.Attribute("isFinished").Value==Boolean.FalseString).Select(ElementToWorkItem)); } publicObservableCollection<Entity.Business.WorkItem>GetDoneBy(Func<Entity.Business.WorkItem,bool>exp) { varallDone=GetDoneAll(); returnnewObservableCollection<Entity.Business.WorkItem>(allDone.Where(exp)); } publicObservableCollection<Entity.Business.WorkItem>GetDoneAll() { returnnewObservableCollection<Entity.Business.WorkItem>(_xmlOperation.SearchBy(e=>e.Attribute("isFinished").Value==Boolean.TrueString).Select(ElementToWorkItem)); } privateXElementWorkItemToElement(Entity.Business.WorkItemitem) { returnnewXElement("workItem",newXElement("desc",item.Desc),newXAttribute("id",item.Id),newXAttribute("name",item.Name),newXAttribute("workType",EnumHelper.GetEnumNameFrom(item.WorkType)),newXAttribute("createDate",item.CreateDate),newXAttribute("isFinished",item.IsFinished?Boolean.TrueString:Boolean.FalseString)); } privateEntity.Business.WorkItemElementToWorkItem(XElementelement) { WorkItemTypeworkType; if(!Enum.TryParse(element.Attribute("workType").Value,outworkType))returnnull; varxElement=element.Element("desc"); varstrDesc=string.Empty; if(xElement!=null) strDesc=xElement.Value; returnnewEntity.Business.WorkItem { Id=newGuid(element.Attribute("id").Value),Name=element.Attribute("name").Value,CreateDate=DateTime.Parse(element.Attribute("createDate").Value),Desc=strDesc,WorkType=workType,IsFinished=bool.Parse(element.Attribute("isFinished").Value) }; } } }

Xml:

<workItems>

<workItem id="" name ="" createDate="" isFinished="">

<desc></desc>

</workItem>

</workItems>