I'm wanting to create a database programmatically from the edmx or edmx.sqlce file in my project. I read the best practice when sending the data out to users this is the best way.But I haven't found anything on it. Or is it best to create it and send it out with the program? How would I do updates to the database if I did this? How do I tell which version the database is?
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c# - Are Microsoft Entity Framework and ADO.NET Entity Framework (.edmx) the same?
View 7 RepliesIn entity framework we can use 3 approaches model first , code first , database first but each one of them needs manual hand touch(means creating database or create model or write the POCO class codes or entity class codes) before proceeding to the next step ( using EF in context ).What if I want to create database and tables and table relationships programatically and still want to have to features of EntityFramework 4.3.
To be more specific ,from this example http://support.microsoft.com/kb/307283 we can create database , tables and everything using SQL command but we can't have the advantages of entity framework. So if we want to have that what should we do? To give the ability to create dynamic table fields those steps will not be sufficient. In all 3 steps database , table and table columns are fixed. There is no way that a user can create new tables or columns dynamically. http:[url].... in this post , it shows how to create manual db, tables and etc using SQL but it is based on ADO.NET but I want Entity Manager to do that.
i'm searching for information on how to programmatically create a database. i want to manage some data and the windows forms application i wish to built will provide users to create, open, manage & delete databases with small amount of data presented into a datagridview.as an example, if, in VS, you click Project and Add new item, it's possible to choose Local database and cancel the wizard, than manually create and edit a table.is there a way to do something similar with some code?i've checked msdn but cannot find anything on this.
View 3 RepliesI need information on how to programmatically create and use an Access database in VB 2005.
View 17 RepliesI have the code I am using below. On 3.5 framework Access 2003 database vb net 2008
I already have the database created but need to be able to add Tables and fields with the correct datatypes. So far it's not working but i don't know why or where the error is.
Private Sub MDIParent_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Try
[Code].....
How can I create an icalendar file with minimum data, I try to make it as the following but somethings wrong, when I try to import to my Google calendar, it says Events successfully imported but I cant see those event on my calendar
strResult.Append("BEGIN:VCALENDAR" & vbCrLf)
strResult.Append("VERSION:2.0" & vbCrLf)
strResult.Append("METHOD:PUBLISH" & vbCrLf)
[Code]....
I'm writing my program in VB.Net,Part of my program is supposed to create a .eml file containing either an xml or a pdf file or both as attachments. Prior to writing this program, I had never seen what a .eml file looks like, let alone an .eml file with attachments(I never used any of the outlooks), so I got someone to send me an email containing both these attachments and save the .eml file, so I could use this as a template in my own program.However, I noticed that the pdf file, after having been attached, is a huge string of letters(see below). Probably some sort of encoding. My problem is, my program is going to be creating several different pdf files and adding them as attachments to .eml files. How do I encode the different pdf files into a similar huge string of text as the one below? Or am I going about this the wrong way? What would be an alternative way to do this? Because having to encode that long string of text seems like it would be a very daunting task.[code]
View 6 RepliesI developed an application in VB.Net where we can export the eml and msg files to a pst file.I was able to do this task using redemption.dll and profman.dll along with outlook 2003 installed.
Now,I want to create a pst file using redemption.dll and profman.dll without installing outlook.Is it possibe to create a pst file without installing outlook?
I am starting programming entity framework by julie lerman. all her examples are in c#, which i do not use. when i right click on the edmx model in solution explorer (vb2010 express), i do not get an 'open with' option, only 'open' which italready is, in design mode.
View 2 Replieshook up the edmx generated classes such that we can include them on the uml models? This would be great if we could because when we do support we could reverse engineer the database, generate the objects and then directly use them in our sequence diagrams and in our workflow services. Also if we could generate code, and or link code back to the model from the UML model classes that would be great as this would let us graphically show our applications at any point.
View 1 RepliesI'm triying to create a dynamic query to Entity FW (i'm using Self tracking Entities over EF)
This is what i'm doing:
Public Class Specification(Of TEntity As Class)
Private _predicado As Expression(Of Func(Of TEntity, Boolean))
Public Sub New(ByVal columna As String, ByVal condicion As OperadoresComparacion, ByVal valor As Object)
[Code].....
I have two properties ("FIRST_NAME" and "LAST_NAME") I need to access as a single property (e.g. "FULL_NAME"). Is there a way for me to add a property to my entity model that contains the combine value of FIRST_NAME and LAST_NAME?
View 1 RepliesI am trying to build a survey engine from an existing database design which is like this.
[Code]...
The line Order By Key.RecordOrder throws a null reference exception and I can understand why. Can someone advise on how to resolve this by just modifying this one query? I am fairly new to LINQ and the necessity to write this project
[Code]...
Here are the entities that i have...
Public Class Account
Public Property AccountId As integer
Public Property AccountDescription As String
Public Property Transactions As List(Of Transaction)
End Class
[Code]...
i would like to make it suc that when i do "db.Account.find(1)" for example it also loads in the list of all transactions which have the coresponding AccountId. I'm not too sure what type of relationship this is?? anyway, right now i can do
Dim acct As Account = db.Account.Find(1) acct.Transactions = from ts in db.transactions select ts where ts.AccountId = acct.accountid but i know this is not the correct way, there must be a way to map this out so that entity can just load everything in one shot right?
I want to update an entity without loading the entity from the database first. I've accomplished this but only by knowing all of the entities properties and then using the "attachto" method. My issues is i don't want my app to need to remember all of the properties. Example:
[Code]....
Entity Splitting: one class, two or more tables.Here is how it is done in C#, but I need to get it working in vb.net.One more thing: the class name and table columns do not match, so I have to be able to map that out, too.I have to get this to work this way because the place I'm working at right now is a vb.net only shop and the database schema is fubar, but they have so much (millions) of lines of code done directly against the database in both asp classic, vb.net, AND asp.net webforms that changing the schema right now is not realistically possible.
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Entity<Post>()
.Map(m =>
[code]....
When you use the feature "generate database from model" how do you put some data into a table?for example i want a tabel with all country after the database is created. Is there a script / shortcut to do this?
View 3 RepliesI am trying to jump from ASP Classic to asp.net. I have followed tutorials to get Entity Framework and LINQ to connect to my test database, but I am having difficulties figuring out ExecuteQuery(). I believe the problem is that I need an "entity class" for my database, but I can't figure out how to do it. Here is my simple code:
Dim db as New TestModel.TestEntity
Dim results AS IEnumerable(OF ???) = db.ExecuteQuery(Of ???)("Select * from Table1")
From the microsoft example site, they use an entity class called Customers, but I don't understand what that means.
I am trying to create a generic typed class, but am running into a problem. Here is my basic class definition:
public class QueueObject<T> where T : System.ServiceModel.DomainServices.Client.Entity
{
public string LoadingMessage { get; set; }
public System.ServiceModel.DomainServices.Client.EntityQuery<T> Query { get; set; }
}
I am trying to add instances of this class to a queue
private Queue<QueueObject<Entity>> _queue;
this._queue.Enqueue(new QueueObject<MyEntity> {Query = MyContext.GetMyEntitiesQuery(), LoadingMessage = "Loading some stuff"});
This doesn't work. I get an error saying that QueueObject cannont be converted to QueueObject. I don't understand because MyEntity inherits from Entity.
Public Class QueueObject(Of T As System.ServiceModel.DomainServices.Client.Entity)
Public Property LoadingMessage As String
Public Property Query As System.ServiceModel.DomainServices.Client.EntityQuery(Of T)
End Class
[code]....
I need to deploy my vb.net application via group policy. I found some information on how to do this here
View 2 RepliesWith VB.net, I'm coding a simple application to get more used to the new .Net format.
I'd like to save all the information to a 'new' database file. how to create a database on the fly, once that is done i'll be able to connect to it no problem, but actually creating the file is proving difficult to work/find out.
Also, with vb.net and the newly created custom file, how can it be made to automatically open that information with the program?
Is there a method in installation to associate the file type with the new program? How can i check when the program loads if a database file has been 'double-clicked' (rather than just running from the .exe of the program) and proceed to load the data?
EDIT1 - Extra InfoThe windows application has many different fields and content etc, then i need to save that to a file that could later be loaded by 'double clicking'. I assumed the easiest way would be to create a mini-database for each unique file
Is it possible to create a class programmatically?
View 2 RepliesI'm currently working on building a program that will take a MS Access database system produced by my company and create a VB.Net project with all the forms in it (obviously the code should be manually done, but to save time the forms and controls can be produced automatically).I have tried Googling and seem not to be able to find anything about this (which probably means I wasn't searching with the right keywords), I was wondering whether anyone knows any good resources on how to create the VB.Net project programmatically as I already know how to do all the access stuff.
View 1 RepliesHow do i create a timer programatically, say, every time i hit a button. if i want each timer to stay running for an hour, would they have to be named different each time the button is pressed, since the previous timers would still be running.
View 14 RepliesHow do I create a .xsd Schema file from a given .xml file programatically?
Is there a .NET class representing XSD.exe ?
How can i create a File/Registry/Database, to Save the time and playernames?
View 5 Repliesany one to make a complete exe file of my vb project its urgent need for me.
View 2 RepliesIs is possible that you can create database programmatically in SQL CE?
View 2 Repliesi not sure can it be done.
Using VB.net by typing the name and hit the button to Show the person record from the database access.
the log file will pop out and show the person record in VB.Net
