I have an application in MVC4 with Razor and Entity Framework database first.I have a SQL database . Base on this I generated the diagram (edmx) with new Item "ADO.NET Entity Data Model".I choose the database connection,my tables and program has generated a diagram with tables and relationships but I can find the class that must be generated after each choosen table (in solution explorer .For a table student from database i must have the mapping with a class student in my solution ).I want to add some validations .Can somebody tell what I done wrong ?
The EDMX diagram has a "code-behind" file. Click the > beside the .edmx file and you should see a file named the same as the .edmx but ending in .Designer.cs; the classes are defined in the "Entities" region in that file.
Having said that, you should never edit the contents of that file. The code in there is generated from your diagram, so any changes are lost when you alter the data model elsewhere. If you want to add validation attributes to your models, you'll need to create partial declarations somewhere else, and attach metadata classes to them. The accepted answer to this SO question shows what you'll need to do.
You must include the namespace of the EDMX file , you can see that in the properties of the file.
Let's say you create EDMX file in folder Models. in Solution Explorer -> Models -> Model1.edmx -> Model1.tt -> student.cs (this your student table class)
Related
I am following an msdn walkthrough for creating an RIA services solution with Silverlight. Here is the article link. I have followed at least 4 other articles and found like a dozen more over internet but all of those create edmx from SQL server. In my case, I have to use Oracle in backend, so I have created the data model through Oracle Development Tool, Oracle Provider for .Net.
After generating the edmx and building everything,
I move on to create a domain service class to use the classes in silverlight project, but for some reason the context class doesn't load in the dropdown where it should.
A sample class generated by the edmx looks like this
I have been trying to do this for a week now, and after having been tried for half a dozen times, I need help.
If you are using Visual Studio 2012 have a look here:
http://support.microsoft.com/kb/2745294
In summary:
Open your entity model in the designer (If needed, click in the "white space" of the designer to ensure no objects within the model are selected)
In the Properties window, change the "Code Generation Strategy" from "None" to "Default"
Delete the two ".tt" files that are adjacent to the model, with the assumption that you have not modified these files beyond their original state when the entity model was created. If you have modified these files, then customizations to your entity model will be lost.
Rebuild the project
I am developing a project in yii, in that, i will register companies, for each registered company i will create one order form. This form will be dependent on fields entered by me while company registration. This order form will be different for each company. Depending on that form i want to create table in mysql database and also model, view, controller files automatically as i click on submit button. Can anybody help me to create this files of view, model and controller through my application and not by using gii tool. I have created table using createTable() function but not getting how to create model view files in yii
Just use the gii templates by including them after setting the right variables perhaps?
You should be able to find them in framework/gii/generators/ folder. The template folders contain the files that gii uses to generate them. If they don't fit exactly, you could copy and modify them
That being said, I do want to point out that you have to make sure to do the correct chown's and chmod's after you have generated the php files, it's a pretty dangerous practice if you are planning to do that directly on a production machine.
You can edit the gii template to suite your needs. Otherwise, if not needed, you should use gii and do a little adjustments on the model.
I have an application that uses a database with one table currently. I want to add another column to the table. According to this post(http://www.asp.net/mvc/tutorials/getting-started-with-mvc3-part7-cs), there are 2 ways to modify the database: 1. Have EF drop and recreate the db or 2. Explicitly modify the db. Unfortunately, they go over the first method.
What is the correct / easiest way to do the second method if I have a table called Team?
The columns I have are TeamID, TeamAbbreviation, TeamCity, TeamName and TeamDisplayName. I want to add TeamSmallLogoUrl.
To do the second method, just go modify the DB and add your column. Then open the EDMX file in VS (double-click it in the Solution Explorer) and right-click on it when it opens up then choose "Update Model from Database" from the context menu. Click Finish. It'll pick up your added column.
Assuming you are using code-first (hence the EF-4.1 title):
If you are still in development phase and there are no important data in the database, use the Drop-Recreate method. (this is also the easiest way).
If you have some data in the database, just do this manually. The names of the properties and class should match/map directly unto your database schema. (if not mapped, EF will throw an error anyways)
I added am edmx file and a table to my project. How can I get it to generate CRUD operations? I did this in the past where it generated them as stored procs, but cant find the option on the table properties. What did I do wrong?
UPDATE
After fiddling about, I discovered I am confusing my tools. With a DataSet.xsd I can drag a table onto the Dataset Designer and click the *TableName*TableAdapter. If you view the properties window you will see "DeleteCommand, InsertCommand, SelectCommand, UpdateCommand". Is there a way to accomplish this task with Entity Framework too?
(If you have any trouble seeing this you can right click the table in dataset designer > Configure > Advanced options > check "Generate Insert, Update and Delete statements".
Since no one has responded with a method to accomplish the task, then I have to assume the functionality does not exist.
Just a basic question. Learning Linq to SQL and some nHibernate. I am using the mvc tutorial and they drag and drop tables onto the visual studio designer to create the classes and wire up everything.
When I experimented with nHibernate I had to do lots with xml files. Does nHibernate have anything that is "easy" like Linq to SQL or is this drag and drop for Linq to SQL so basic that when I want to do something "real" it won't matter that Visual Studio does this for me (at this basic level)? In other words, the further I go with Linq to SQL, I'll eventually have to handle config files like I do with nHibernate.
Look at Castle's ActiveRecord framework. It replaces the use of XML config files with the use of Attributes directly on the class/property declaration. Also, a tool called ActiveWriter integrates with Visual Studio and allows connecting to a data source and generating the object model!
There is no "native" support like you see with LINQ to SQL. However, there are third party add-ins that will allow you to do something similar with nHibernate. My favorite is this one:
http://sourceforge.net/projects/nhibernateaddin
To use it:
Create a data connection to a
database that contains the structure
you are going to code against (your
development database).
Add a new NHibernate plug-in item
(via add new item) to your project
that will contain you domain objects.
In the property window add the data
connection string from the data
connection you just created (this
isn't automated yet).
Finally, you drag and drop your tables
from your data connection to the
NHibernate plug-in object and when
saved your mapping files and you
domain objects are generated. To use
it you create a data connection to a
database that contains the structure
you are going to code against (your
development database).