I have been working with LINQ to XML and have been stuck with an issue. I would really appreciate any help. I am new to LINQ to XML, but I found it easy to work with.
I have two different syndication feeds that I aggregate to one single syndication feed using Union. The final syndication feed contains 10 items.
I am trying to write the syndication feed to an XML file using XDocument and XElement. I have been able to do that successfully for the most part. But, some of the items in the feed do not have a description as a node element. When I get to the items that do not have this node element I am getting an Exception as I don’t have a description node for one of the items. How can I check the items to see if there is a node called description before I start writing the XML file? If the item does not contain the description node how could I populate it with a default value? Could you please suggest me any solution? Thank you for all your time!
SyndicationFeed combinedfeed = new SyndicationFeed(newFeed1.Items.Union(newFeed2.Items).OrderByDescending(u => u.PublishDate));
//save the filtered xml file to a folder
XDocument filteredxmlfile = new XDocument(
new XDeclaration("2.0", "utf-8", "yes"),
new XElement("channel",
from filteredlist in combinedfeed.Items
select new XElement("item",
new XElement("title", filteredlist.Title.Text),
new XElement("source", FormatContent(filteredlist.Links[0].Uri.ToString())[0]),
new XElement("url", FormatContent(filteredlist.Links[0].Uri.ToString())[1]),
new XElement("pubdate", filteredlist.PublishDate.ToString("r")),
new XElement("date",filteredlist.PublishDate.Date.ToShortDateString()),
// I get an exception here as the summary/ description node is not present for all the items in the syndication feed
new XElement("date",filteredlist.Summary.Text)
)));
string savexmlpath = Server.MapPath(ConfigurationManager.AppSettings["FilteredFolder"]) + "sorted.xml";
filteredxmlfile.Save(savexmlpath);
Just check for null:
new XElement("date",filteredlist.Summary !=null ? filteredlist.Summary.Text : "default summary")
Related
String mySQLString = "select * from document where documentTitle like '%test%' ";
SearchSQL sql = new SearchSQL(mySQLString);
IndependentObjectSet s = search.fetchObjects(sql, 10, null, true);
Document doc;
PageIterator iterator = s.pageIterator();
iterator.nextPage();
for (Object object : iterator.getCurrentPage()) {
doc = (Document) object;
Properties properties = doc.getProperties();
//I am trying to get an absolute or relative path here for every document.
// for eg: /objectstorename/foldername/filename like this.
}
I have tried searching propeties and class descriptions in document . but can't able to find the path. ?
To do it all in one single query (as you are trying to do in your code) you can create a join with the ReferentialContainmentRelationship table. The property Head of this table points to the document, the property Tail points to the folder the document is filled in and the property ContainmentName is the name the document has in the folder. Use the following code to construct the document path:
SearchSQL searchSQL = new SearchSQL("SELECT R.ContainmentName, R.Tail, D.This FROM Document AS D WITH INCLUDESUBCLASSES INNER JOIN ReferentialContainmentRelationship AS R WITH INCLUDESUBCLASSES ON D.This = R.Head WHERE DocumentTitle like '%test%'");
SearchScope searchScope = new SearchScope(objectStore);
RepositoryRowSet objects = searchScope.fetchRows(searchSQL, null, null, null);
Iterator<RepositoryRow> iterator = objects.iterator();
while (iterator.hasNext()) {
RepositoryRow repositoryRow = iterator.next();
Properties properties = repositoryRow.getProperties();
Folder folder = (Folder) properties.get("Tail").getEngineObjectValue();
String containmentName = properties.get("ContainmentName").getStringValue();
System.out.println(folder.get_PathName() + "/" + containmentName);
}
Paths constructed this way can also be used to fetch the object from the object store. The query code can be optimized by using a property filter as the third argument of the fetchRows() method. Don't know how this behaves if the document is filed in multiple folders.
I suggest you explore the "Creating DynamicReferentialContainmentRelationship Objects" section of FileNet documentation:
https://www.ibm.com/support/knowledgecenter/SSNW2F_5.5.0/com.ibm.p8.ce.dev.ce.doc/containment_procedures.htm#containment_procedures__fldr_creating_a_drcr
A FileNet Ddocument can be assigned to multiple Folders, so you can have several logical "Paths" for a given document.
At end, you should get something like "Folder.get_PathName() + DynamicReferentialContainmentRelationship.get_Name()" to display the full pathname.
As described by samples in FileNet documentation, a relationship object (e.g. DynamicReferentialContainmentRelationship) controls the relation of document/folder:
myRelationshipObject.set_Head(myDocument);
myRelationshipObject.set_Tail(myFolder);
Also, keep in mind that a FileNet Document can be also a "unfiled" document, so there is no actual "pathname" or folder "relationship" to be retrieved.
tl;dr from FileNet Content Engine - Database Table for Physical path
Documents are stored among the directories at the leaf level using a hashing algorithm to evenly distribute files among these leaf directories.
I am working in a Spring 3.1 application and I need to find a String template document located in Alfresco's repository. I can already create a file in alfresco with OpenCMIS, but I couldn't figure out how to find a template, so if anyone knows how to do it or point me an example, please let me know, thanks in advance!
There are a number of options you can use. First of all, you need to have a criteria that uniquely identifies your document. Here below I'll show some, hopefully your case falls in one of them or they will inspire you towards a proper solution. The following uses pseudo code, please have a look to the OpenCMIS dev guide for working with the Java client API.
BY ID
Once you create a Document via CMIS, you get the unique ID of it that you can store in your application for later retrieval.
Map<String, Object> templateProperties = createDocumentProperties();
Folder folder = getTemplatesFolder();
ObjectId templateId = createTemplateIn(folder);
storeTemplateId(templateId.getId(), templateProperties); // persist the ID
...
// later on
...
String id = getTemplateId(); // retrieve the ID
Session session = openCMISSession();
Document template = (Document)session.getObject(id);
BY PATH
Similar to the previous example, you will have to take note of where you stored the document instead of its ID, or having a way to construct the path by hand.
String path = getTemplatePath(); // either recover it from DB or construct a path
Document template = (Document)session.getObjectByPath(path);
BY PROPERTY VALUE
Let's say you can use a specific metadata field on a template Document that allows you to easily retrieve it afterwards (e.g. you created some specific Alfresco metadata model for your use case).
String meta = TemplateProperties.TEMPLATE_ID; // e.g. my:templateId
String type = TemplateProperties.TEMPLATE_TYPE; // e.g. my:template
String templateMeta = "TEMPLATE1";
Map<String, Object> templateProperties = createDocumentProperties();
templateProperties.put(meta, templateMeta);
templateProperties.put(PropertyIds.OBJECT_TYPE_ID, type);
createTemplate(templateProperties);
...
// later on
...
String type = TemplateProperties.TEMPLATE_TYPE; // e.g. my:template
String meta = TemplateProperties.TEMPLATE_ID;
String tplId = "TEMPLATE1";
String query = String.format("SELECT * FROM % WHERE % = '%'", type, meta, tplId);
ItemIterable<QueryResult> i = session.query(query, false);
QueryResult qr = i.iterator().next(); // let's assume we have one single match
String templateId = qr.getPropertyByQueryName("cmis:objectId").getFirstValue()
Document template = (Document)session.getObject(templateId);
BY QUERY
The previous approach is not really tied to search by property name, and can be easily extended to use any kind of query that identifies your templates. Have a look at the Alfresco page on its CMIS query language implementation details to learn more ways of querying the repository.
I'm facing a problem when I try to grab the Extended Amount Attribute inside the Opportunity Product Line Entity.
As follows my requirements are that upon creation of a an Opportunity Product Line I have a post-create plugin on it which applies a discount onto the extended amount and creates another line, with the new discounted extended amount. When I try to output the value on another field just to check what it gets, I keep getting 0 strangley. My code is as follows:
// Part where I grab the value
Entity entity = (Entity)context.InputParameters["Target"];
Money extenedAmount = (Money)entity["baseamount"];
//Create new line
Entity oppportunity_product = new Entity("opportunityproduct");
oppportunity_product["manualdiscountamount"] = extenedAmount;
service.Create(oppportunity_product);
Is it even possible to grab the amount? Would really much appreciate if someone could help me out here. Thanks in advanace.
After creation, you want to add a post image. Then reference the post image instead of the target.
if (context.PostEntityImages.Contains("PostImage") &&
context.PostEntityImages["PostImage"] is Entity)
{
postMessageImage = (Entity)context.PostEntityImages["PostImage"];
}
else
{
throw new Exception("No Post Image Entity in Plugin Context for Message");
}
I am using the Exchange Web Services Managed API to work with Tasks (Exchange 2007 SP1). I can create them fine. However, when I try to do updates, it works for all of the fields except for the .Body field. Whenever I try to access (read/update) that field, it gives the following error:
"You must load or assign this property before you can read its value."
The code I am using looks like this:
//impersonate the person whose tasks you want to read
Me.Impersonate(userName); //home-made function to handle impersonation
//build the search filter
Exchange.SearchFilter.SearchFilterCollection filter = New Exchange.SearchFilter.SearchFilterCollection();
filter.Add(New Exchange.SearchFilter.IsEqualTo(Exchange.TaskSchema.Categories, "Sales"));
//do the search
EWS.Task exTask = esb.FindItems(Exchange.WellKnownFolderName.Tasks, filter, New Exchange.ItemView(Integer.MaxValue));
exTask.Subject = txtSubject.Text; //this works fine
exTask.Body = txtBody.Text; //This one gives the error implying that the object isn't loaded
The strange thing is that, inspecting the property bag shows that the object contains 33 properties, but {Body} is not one of them. That property seems to be inherited from the base class .Item, or something.
So, do I need to re-load the object as type Item? Or reload it via .Bind or something? Keep in mind that I need to do this with thousands of items, so efficiency does matter to me.
Calling the Load method solved my problem :)
foreach (Item item in findResults.Items)
{
item.Load();
string subject = item.Subject;
string mailMessage = item.Body;
}
I had the same problem when using the EWS. My Code is requesting the events(Appointments) from the
Outlook calendar, at the end I couldn't reach to the body of the Event itself.
The missing point in my situation was the following "forgive me if there is any typo errors":
After gathering the Appointments, which are also derived from EWS Item Class, I did the following:
1- Create a List with the type Item:
List<Item> items = new List<Item>();
2- Added all appointments to items list:
if(oAppointmentList.Items.Count > 0) // Prevent the exception
{
foreach( Appointment app in oAppointmentList)
{
items.Add(app);
}
}
3- Used the exchanged service "I have already created and used":
oExchangeService.LoadPropertiesForItems(items, PropertySet.FirstClassProperties);
now if you try to use app.Body.Text, it will return it successfully.
Enjoy Coding and Best Luck
I forgot to mention the resource:
http://social.technet.microsoft.com/Forums/en-US/exchangesvrdevelopment/thread/ce1e0527-e2db-490d-817e-83f586fb1b44
He mentioned the use of Linq to save the intermediate step, it will help you avoid using the List items and save some memory!
RockmanX
You can load properties using a custom property set. Some properties are Extended properties instead of FirstClassProperties.
Little example:
_customPropertySet = new PropertySet(BasePropertySet.FirstClassProperties, AppointmentSchema.MyResponseType, AppointmentSchema.IsMeeting, AppointmentSchema.ICalUid);
_customPropertySet.RequestedBodyType = BodyType.Text;
appointment.Load(_customPropertySet);
I would like to populate a Treeview.
Here is what I have in DB :
table : Box
BoxID
BoxName
table Book :
BookID
BookName
BoxID (fk Box.BoxID)
table Chapter:
ChapterID
ChapterName
BookID (fk Book.BookID)
As you may know a treeview is made up of treenode object.
A treenode object have a text property and a tag property.
The "text" property is the text that it's display on the screen for this node and the "tag" is an "hidden" value (usually uses to identify a node)
So in my case; the fields ending with ID will be used in the "tag" property and the fields ending with Name will be used in the "text" property
example :
so for a book; I will use the BookID field for the "tag" property and BookName field for the "text" property
note : I use a dbml so I have a Book object, Box object and Chapter object and I use linq to get them from the db.
So my question is; what is the best practice to build this tree?
I have a solution but it's really ugly because it looks like I'm duplicating the code.
The problem is that the values I need to extract for the text and tag properties are identified by differents fields name in the db
So for the book level, I need to get the BookID field to populate the tag property of my node; for the box level, I need to get the BoxID field to populate the tag property , ....
How can I make a kind of generic way to do it ?
I hope I made myself clear enough, don't hesitate to ask me questions :)
Thx in advance
Here is what I have for the moment
I get the list of box with a linq (dbml) request.
List<Box> MyListofBox = getMyListofBox();
Treenode tnBox = null;
Treenode tnBook =null;
foreach(Box b in MyListofBox )
{
tnBox = new TreeNode();
tnBox.tag = b.BoxID;
tnBox.text = b.BoxName;
List<Book> MyListofBook = getMyListofBookByBoxID(b.BoxID)
foreach(Book boo in MyListofBook )
{
tnBook = new TreeNode();
tnBook.tag = boo.BookID;
tnBook.text = boo.BookName;
tnBox.nodes.add(tnBook);
}
mytreeview.nodes.add(tnBox);
}
but of course I don't like this solution...
do you have a better way ?
I would extract the you need from the database in the form of a struct, possibly via the anonnoumous type that has been added to C# together with linq. Then I would populate insert this data into the place in the tree.
From what I get, you are trying to get each property separately, which will not work so well, because then you will have to make a call to the database for each separate property, which is very wasteful.
Addition based on what you have added
I do not believe the code can be more compact - the names you call are similar, but not the same and the way you do it was what I was trying to explain earlier.
You could
Define an key/value interface that both Box and Book implement
Define a delegate that returns a TreeNode and create delegate methods that accept Box and Book
However, I think the code is fine as written. Sometimes you just have to code it and there's little point in further abstracting or optimizing it.
The only issue I see in the code is that you're making a database call in a loop. Whether or not that's a problem depends on the application.