Using Blend 4 I know how to generate sample data using the 'Create Sample Data from Class...' option in the Data tab. This creates a .xaml file in a SampleData folder that I can use to populate my UI in design time.
My question is how do I regenerate this XAML file when I change the base class that this .xaml is based on? I added a new C# property called 'Clients' and it shows up in the Data tab after I rebuild, but I do not see how to regenerate the XAML sample data to include data for this property.
I would rather not scrap the entire sample data and recreate it as that would require me to re-setup the data types on each property again (Number, 3 words, Address, etc).
Thank you
I don't think this is possible. As far as I know the setup of the datatypes is not stored anywhere. The sample data for the string format you select is written to the file immidately. And only if the type is defined in the sample data xaml file. The only thing you can do is adding the new property by hand and than select a format for it.
Related
I'm creating a project in ruby on rails. Is it possible to add data just like normal form and save them in database in show page? Is it possible to add data in tabular form and let the user save the data in batch (i.e. 5-6 record at a time) for the same employee? If so, then how can I achieve this functionality?
You can read all needed information from file and parse it into the array of objects, and then use https://github.com/zdennis/activerecord-import gem for insert it in db (for production).
also, you may look into db/seeds.rb file for adding new data in develop.
I have a program made in Visual Basic 6 which access data from a database (made with Microsoft SQL server management studio express 2000 then migrated to 2005) and puts all data into an immense GridView.
The views, typedlists, queries, etc... all have to go through LLBLGenPro, which is used from what i learned to regenerate the entire code of our program in case we need to add anything. The project on LLBL contains entities, typedlists and typedviews. I'm not a pro of LLBLGenPro and i'm just starting to discover it
I have to add two columns to the Gridview with two specific tables columns containing the information i need. So i went onto the database to modify the view i needed to get the required data (which now gives me the two more desired rows), then i loaded the database again in LLBLGenPro and made sure to check my new fields in the typedList that contains them. I regenerated the program, and
started the visual basic project. My columns appear in all the files where they should be, with the right names (the typedlist and the views referring to it). The classes now find 23 column indexes instead of 21. All seems fine for now.
The typedList is then imported into the main class:
Private _typedList As New DBSqlTypedList.MyClassNameTypedListTypedList
All the items from the table in the DB are already loaded correctly by the code using filters and appear in the program without problem. The typedlist we need (imported as _typedList) fills the data in the gridview (GridBT) with the following lines:
If isOpenSoftware Then
With Me.gridBT
.AutoGenerateColumns = True
.AlternatingRowsDefaultCellStyle = Nothing
.DataSource = _typedList
Now here's the problem: _typedList does not see my two news rows at all and they don't appear in the grid at all.
Typing _typedList.item(0).xxxx for example gives me access to all the rows that were already there but none of the two i added appear in it.
Did I forget something in LLBLGenPro?
Don't hesitate to tell me if you think i didn't send enough code or information!
I'm currently developing my first MVC component for Joomla 3.x. All in all I'm bit struggling with language/translation issues in database.
My problem is that I need to store translated content of user generated content which comes from the backend. For example someone enters a new item in German (stored in database) and needs a translation in another language. How to accomplish that in Joomla? I don't like to generate a new item for every different language when the rest is all the same.
I thought about a table "item" and a table "item_language" with that structure (strongly simplified for viewing purposes):
item
id PRIMARY INT
price DOUBLE(4,2)
item_language
itemid PRIMARY INT
language PRIMARY CHAR(5)
name VARCHAR(50)
In item_language I would like to store the different translated versions. In the language field there would be the region code (eg. de-DE) to identify the language.
My problems:
How to display the different (translated) versions in backend?
Is this the right database model?
Any help is appreciated!
You have really found yourself a nice task for a first component in Joomla!
A rather generalist answer:
The database model seems right. Alternatively you could encode in JSON the language data, but this could make later query operations potentially difficult. This way you will only have one table to work with.
As far as I know (if you are using JModel / JTable to manipulate the data) can't do this directly, as JTable is really only designed to manipulate single tables.
What you can do:
For editing: figure a way to represent this graphically ( for your users to see and edit this one to many relationship) and to post this data (language texts as an array) to JModel. In the model you can maintain the desired relationships and save the data using JTable.
Viewing (without editing) shouldn't be an issue, it would be a simple JOIN.
If you are willing to create a basic component on github, I might even give you a hand with JModel / JTable.
I found a way to deal with the things I needed.
Thanks Valentin Despa for guiding me in the right direction :-).
Here the whole procedure (simplified - validations and exact steps omitted):
Define the form fields in the models/forms/site.xml as normal.
In views/site/tmpl/edit.php add self coded Javascript (based on jQuery) to deal with the fields which have content in multiple languages stored as JSON in database.
Clone the original form element and modify the needed attributes (id, name, ...) to display a special version just for the defined languages. As content - extract the JSON for the needed language from original field content and display.
Hide the original field with Javascript and append the customized versions to DOM.
Afterwards in tables/site.php I read the dynamically generated content withJInput and build together the original field by generating JSON and saving to database.
It's working like expected.
Im working on an online store project where I have already made it possible for an administrator to update different table entries via the store gui (like items, user profiles, orders etc). SaveChanges(); is used to save the changes.
Im currently trying to figure out how to make this work:
An entry in table "items" gets updated.
Before the entry in the table "items" gets updated, a copy of the old entry gets saved into a table named "history-items".
The copy that is saved to "history-items" preferably has a timestamp.
How would I go about doing this? (As you might tell, I just recently picked up visual studio, and am pretty new to everything)
Thank you.
There are atleast 3 ways to do this:
If you are using SQL Server 2008 or newer this is now built in functionality, see: http://msdn.microsoft.com/en-us/library/bb933994.aspx
If you opt not to use that then the simplest solution is to use database triggers.
If you want to do it in C# code, then you need to read the original values before saving, and save these original values to the history table. For reading original values see: How to get original values of an entity in Entity Framework?
I would go for option 1 if possible.
I have inhereted some project which uses Entity Framework in a way which makes it hard to make there any changes. It uses QueryViews for almost all tables (cca 50 tables) and of course stored procedures. Now I have to change there quite a lot of things ... rename tables, add tables, change columns etc.
When I tried to use the "Update Model from database ..." wizard, than after the update (where I added/removed the tables and let refresh the others using the wizard) from the database the Entity Data Model Designer rendering stops working ... there is just blank window with the text "The Entity Data Model Designer is unable to display the file you requested."
So I tried different approaches (like manually editing the edmx file), but the problem remains. The editor shows only the "The Entity Data Model Designer is unable to display the file you requested."
The mapping using QueryViews makes it probably more complicated. It is well known that the designer can not work with the QueryViews properly (one can not edit them using the designer) and the Entity framework engine even does not recognize that the columns from CSDL are mapped using the QueryViews and complains on each and every column (which is mapped using QueryView) that "Error 11009: Property 'XXX' is not mapped." I see exactly 100 errors like this. Maybe somewhere after the 100th error, there is some hint (in the form of other errors) how to fix the issue with Designer, but I don't know how to see them. The 100 limit is most likely hardcoded in VS2010 (http://stackoverflow.com/questions/2880936/how-to-increase-error-limit-in-visual-studio).
Btw. the code (classes for entities etc.) is generated without problems.
So, the question is:Is there a way how to see some log or something, where would be noted why the Entity framework Data Model Designer is not able to render anything?
Or is there at least some way how to see the rest of the errors (besides the 100 errors)?
Or does anybody know the ideal way of dealing with updating schema in EF besides using the wizard?
Try to add new EDMX and right click >> open with >> XML editor, then you can see a complete set in an empty model definition in EDMX. So you can compare the two EDMX and check notice which part of the EDMX is missing.
Here is the error link
In the end I have just do all the changes manually by editing the xml. However, I used the model designer (the GUI integrated in VS for EF) for creating the whole CSDL layer. So my approach was to carefully choose tables in the correct order and add them one by one in the multiple iterations of the following steps:
Use the model designer to create the csdl layer for the chosen table including all relations with already existing table. This at least ensured that the designer was usable later on and it saves the manual writing of the CSDL objetcs.
Write the SSDL layer, which should reflect the DB table.
Write the mapping layer (in my case using the QueryViews).
Try to compile and resolve all compile errors.
Repeat for next table (or more tables if you find it easier).
I hope this will help somebody.