I'm building a Sharepoint 2010 export tool for back up reasons (a bit like the filemanager from Metavis).
When downloading a file to local disk I need to back up the metadata associated with the document. Which I will store in a csv-file. My first approach was to iterate all listItem.fieldvalues, but that doesn't really work because some fieldvalues are complex types, which would needlessly complicate the backup file. Some values even have line endings, for example "MetaInfo". Furthermore not all values are needed to restore the content when that might be necessary.
So my idea is to only get the values from the Fieldvalues collection which are needed to do a functional restore, supplemented with all the user added metadata.
To do this I want to check all fieldvalues against an exclusion list to see if it is present. If it is present don't back up. If it is it is either user generated metadata or a value I need like for instance "author", "created".
So my question is, does anyone know of a list of all fieldvalues keys?
Or is there a better approach to my problem?
Thanks
Update: Well, as I was iterating through the FieldValues collection any way. It was easy to do a dump of all the values to a CSV. Running it once was enough to get all the values. Now all I need to write is an xml file for configuration. This leaves the question: is there a better way of doing this?
Filter the list fields by writing following code
using System;
using Microsoft.SharePoint.Client;
clientContext.Load(
listItems,
items => items
.Include(
item => item["Title"],
item => item["Category"],
item => item["Estimate"]));
Source: http://msdn.microsoft.com/en-us/library/ee857094.aspx#SP2010ClientOM_Creating_Windows_Console_Application
You can create an view with all fields, get the view using sharepoint object model and and get its column name from collection and filter them as per your requirement.
I have finished the application. As I wrote in my update I have made a list of all fieldValues by exporting them to a CSV file. After that I made a configuration-file with a boolean 'Backup'. This makes it possible to control which values are to be used when a backup is made.
I retrospect I think a configuration file was not needed. The values used when backing up are so much part of the whole workings of the program that a configuration file gives an administrator or casual future developer the impression that a simple reconfiguring will fulfill there needs.
I can now see that if the program needs to change due to new requirements the code has to be changed anyway. So even though setting a value to 'True' will change the output. Some other code has to be written as well. If I were to write it again I would probably use constants. This makes it all less dynamic, but still fulfill the needs of the program.
(BTW a list of all the names off the standard fieldValues would have been nice to start with. I would publish it here, but I don't have access to the file anymore, because I switched jobs recently.)
Related
I want to create a record of an entity, but I need to pass a list of guids to the pre create plugin. I don't want to create fields or related entities to do this. Can I use the Shared Variables to do it?
In other words is it possible to set shared variables before initiating the action that will trigger the plugins that will consume them?
EDIT:
I can be creating this type of records from different points that integrate with crm, silverlight, external pages or even plugins of other entities. My current problem can be solved with a field on the entity, but this way if I had to send parameters to control the execution of the plugin for two or more independent actions I would need one field for each action or instead use only one field using a complex format/parse pattern to parameterize each different action. Using fields to accomplish this feature looks a bit excessive.
If the shared variables could be set before the call of the action that will trigger the plugin that would solve the problem and I wouldn't have to create fields in the crm database, because the data I want to pass to the plugin it will only be needed at that time, like a parameter in a function, no need to persist them in the database.
But if it is not possible I will have to stick with the fields :(
Not if they vary by entity/execution of the plugin.
Options:
Set them in the plugin configuration if they don't change but need to be updated
without a recompile.
Apply them as a delimited string in a single field on the entity if they vary per record.
What's the reason for not wanting to use 2?
Nope. The easiest solution that I can think of is to add a BAT (big-ass text) field to the entity and populate it with a comma-delimited list of GUIDs, then access that field in your Create plugin. You could even clear it out if you don't want that extra data in your system.
Edit after your edit:
General comment about your thinking process: you are probably overthinking it. :) Using a single field, you could pass in any kind of "command" using a json or xml formatted string. As I said above, in the pre-create plugin, after you have extracted this "argument" field, you can clear out that field in the Target entity image and that data will never be persisted to the database. Technically it achieves the exact result you want with the only side effect being one extra "argument" field that is always NULL in the database. Don't fight simplicity so hard! :)
The templates for these HTML emails are all the same, but there are just different variables for say, first name, last name and such.
Would it just make sense to store the most minimal of data that I need, and load the template in and replace the variables everytime?
Another option would be to actually create the HTML file and store a reference to it, which probably would be the easiest to do except it might be a pain managing the files, and it adds complexity in regards to migrating, file permissions, et cetera.
Looking for opinions from people who've done this before...
GOAL/PURPOSE/USE:
I have a booking engine. When users make a booking, they are sent a confirmation email, generated from the sessionized booking data.
This email provides a "Cannot view this email? See it here" link which provides a web view of the email, in addition to a plaintext view.
I need to display the same email that was sent out, in addition to the plaintext view.
The template is subject to change, but I think because of that very fact I should have a table of templates and map the data to a template.
That's what I would do, because the template layout may change over the time, but the person information should remain the same. So, it makes sense to just store the person information in the database and leave the template out from the database.
In fact, it would be even better if you use template engine such as Velocity (in Java) to construct your HTML emails... very easy, by the way.
On the one hand cpu is more expensive then memory, so mostly it is better to save more data to reduce cpu power used by computation.
But in your case, I would save the minimal data, the emails or what you are tying to save, because it allows you to easily remodel your templates, and to reuse the data at multiple places of your application.
You persist redundant data (especially because of the template) which is in no way normalized. I would not suggest to do that. But mentioned in the comment it is important what you want to do with that data.
If you only save the data you need you could for example exchange that template easy and use another one.
Yea, your right on track. I did a similar thing. All dynamic/runtime variables were starting from ##symbol.
So in database you would have one Template table. One table would be for dynamic/runtime variables. One table for Mapping between Template and dynamic/runtime variables.
tblTemplate - TemplateID, TemplateValue
tblRuntimeVariables - RuntimeVariableID, VariableString, VariableSQL
tblMapping - TemplateID, RuntimeVariableID, RuntimeVariableValue
Advantage of using an extra mapping table is that on adding new dynamic variables to existing change would mean making no change to existing database. Only more rows would be added to tblMapping.
In my case I was also having one extra column for storing SQL Statements in tblRuntimeVariables in case the value for a runtime variable is fetched from database.
I have a core data document based application. Part of my model works by having a DeviceType table, and a Devices table with a relation between them. I would like my application to be able to store the list of DeviceTypes separately from each file, and possibly be able to sync that to a server later.
What would be the best way to accomplish this?
Thanks,
Gabe
You're using a lot of database terminology with Core Data. You should break that habit as soon as possible (the reasons why are given in the introductory paragraphs to the Core Data Programming Guide).
I assume your "usually-static" device list is something you want to be able to update as new devices come out? I would actually recommend just storing the list as a PLIST resource in your app bundle and pushing an update to the app when new devices come out (for simplicity). Using a dictionary-based PLIST, your keys can be device IDs and that key can be a simple string attribute of your managed objects. It's perfectly reasonable to look things up outside your Core Data model based on some ID.
If you must update, I'd still include the "default" list with the app (see above) but if a ".devicelist" (or whatever) file is present in the documents folder, use that instead. That way you can periodically check for an updated list and download it to the docs folder if it differs.
If I've misunderstood you, I encourage you to clarify either by editing your question or posting comments.
I would like to be able to loop through all of the defined parameters on my reports and build a display string of the parameter name and value. I'd then display the results on the report so the user knows which parameters were used for that specific execution. The only problem is that I cannot loop through the Parameters collection. There doesn't seem to be an indexer on the Parameters collection, nor does it seem to implement IEnumerable. Has anyone been able to accomplish this? I'm using SSRS 2005 and it must be implemented within the Report Code (i.e., no external assembly). Thanks!
Unfortunately, it looks like there's no simple way to do this.
See http://www.jameskovacs.com/blog/DiggingDeepIntoReportingServices.aspx for more info. If you look at the comments of that post, there are some ways to get around this, but they're not very elegant. The simplest solution will require you to have a list of the report parameters somewhere in your Report Code, which obviously violates the DRY principle, but if you want the simplest solution, you might just have to live with that.
You might want to rethink your constraint of no external assembly, as it looks to me that it would be much easier to do this with an external assembly. Or if your report isn't going to change much, you can create the list of parameter names and values manually.
If I'm understanding your question, just do what I do:
Drop a textbox on the report, then while you are setting up the report, insert the following:
="Parameter1: " + Parameters!Parameter.Label + ", Parameter2: " + Parameters!Parameter2.Label...
Granted, it's not the prettiest thing, but it does work pretty well in our app.
And I'm using Labels instead of Values since we have datetime values, and the user only cares about either the short date or the month and year (depending on circumstance), and I've already done that formatting work in setting up the parameters.
I can think of at least two ways to do this. The first might work, the second will definitely work.
Use the web service. I'm pretty sure I saw API for getting a collection of parameters. Even if there's no direct access you can always create a standard collection and copy the ReportParameter objects from one to the other in a foreach loop - and then access Count, with individual parameter properties available by dereferencing the ReportParameter instances.
Reports are RDL. RDL is XML. Create an XmlDocument and load the RDL file, then use the DOM to do, well, anything you like up to and including setting default values or even rewriting connection strings.
If your app won't have file-system access to the RDL files you can get them via the web service.
OK, first let me state that I have never used this control and this is also my first attempt at using a web service.
My dilemma is as follows. I need to query a database to get back a certain column and use that for my autocomplete. Obviously I don't want the query to run every time a user types another word in the textbox, so my best guess is to run the query once then use that dataset, array, list or whatever to then filter for the autocomplete extender...
I am kinda lost any suggestions??
Why not keep track of the query executed by the user in a session variable, then use that to filter any further results?
The trick to preventing the database from overloading I think is really to just limit how frequently the auto updater is allowed to update, something like once per 2 seconds seems reasonable to me.
What I would do is this: Store the current list returned by the query for word A server side and tie that to a session variable. This should be basically the entire list I would think. Then, for each new word typed, so long as the original word A exists, you can filter the session info and spit the filtered results out without having to query again. So basically, only query again when word A changes.
I'm using "session" in a PHP sense, you may be using a different language with different terminology, but the concept should be the same.
This question depends upon how transactional your data store is. Obviously if you are looking for US states (a data collection that would not change realistically through the life of the application) then I would either cache a System.Collection.Generic List<> type or if you wanted a DataTable.
You could easily set up a cache of the data you wish to query to be dependent upon an XML file or database so that your extender always queries the data object casted from the cache and the cache object is only updated when the datasource changes.
RAM is cheap and SQL is harder to scale than IIS so cache everything in memory:
your entire data source if is not
too large to load it in reasonable
time,
precalculated data,
autocomplete webservice responses.
Depending on your autocomplete desired behavior and performance you may want to precalculate data and create redundant structures optimized for reading. Make use of structs like SortedList (when you need sth like 'select top x ... where z like #query+'%'), Hashtable,...
While caching everything is certainly a good idea, your question about which data structure to use is an issue that wasn't fully answered here.
The best data structure for an autocomplete extender is a Trie.
You can find a good .NET article and code here.