Generate Enum From Values Present In A Table Using ADO.NET Entity Framework?

Apr 14, 2010

My requirement is to create an Enum based on values present in a table from DB. I am using ADO.NET Entity Framework model (.edmx file),

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So, have a search form where users can enter one or more keywords, these keywords are then held in a List<string> called keywords. Now using Entity Framework have an Organisation entity with a Name field. What I want to do is select those organisations whose name contains all the keywords. I don't care if they are in the right order or not but it just contain all the keywords. Also organsiations is a big table in the database so I don't want to materialise all the organsiation objects on the server and then loop through them. So what I'm looking for (excuse my LINQ naivety here) is equivalent to the non-existent LINQ statement:

[Code]....

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[Code]....

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[Code]....

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[code]...

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i have the following code where I want to retreive the data form a table using entity framework and put it to a list of the same type:

List<ItemDetail> iDets = new List<ItemDetail>();

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I've sucefully created a method to insert values through EF, but i've a question (maybe, a newbie question).

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Example 1 (DAL):

[Code]....

Example 1 (View Layer, on a click button for example):

[Code]....

Or should i receive the strings in DAL like this: public bool NoticiasInsert(string tituloPT, string tituloEN, string descricaoPT, string descricaoEN)

Then i create the object cdcModel.noticias and set the fields there with the strings values.

What do you advice me to do? I know that both ways works, but i'm trying to develope with better patterns (i don't know if this is the exacly word, sorry my bad english)

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i have a model:

[Code]....

and in my controller, i have:

[Code]....

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[Code]....

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I get an cast exception when i am trying to insert an entity in Entity Framework (using code-first). From this code :

public virtual T Insert(T entity)
{
return Context.Set<T>().Add(entity);
}

The cast exception is like "impossible to cast ...Collection'1(Entity) to type (Entity)" I can't figure out why. I am pretty sure ive done everything right. Post entity

public class Post
{
public long PostId { get; private set; }
public DateTime date { get; set; }
[Required]
public string Subject { get; set; }
public User User { get; set; }
public Category Category { get; set; }
[Required]
public string Body { get; set; }
public virtual ICollection<Tag> Tags { get; private set; }
public Post()
{
Category = new Category();
if (Tags == null)
Tags = new Collection<Tag>();
}................................

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I am mapping a stored procedure to an entity by right clicking on the entity (in the .edmx) and selecting "Stored Procedure Mapping." This brings you to a Mapping Details - "Name of Entity" Window that allows you to select the insert, update, and delete stored procedures associated with the Entity. It also maps the stored procedure parameter to the Entity "Property" (Column).

I'm gettin an error "error 2042: Parameter Mapping specified is not valid." The cause of the error is fairly obvious, in the Insert stored procedure that has been selected, a 'CHAR' parameter is being mapped to an Int32 Entity Property. I altered the stored procedure parameter to match the entity, I deleted the stored procedure, readded, and reslected it as the Insert function. I also cleaned, validated, updated model from database. No matter what I do, the parameter list in the mapping details doesn't reflect the change to the stored procedure. It's stuck on a char --> int32 mapping, even though it has been changed, like it's buried deep in meta data some where.

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I am trying to add a new entity and have to refernce associated data to add it. I cannot load the Referencetables. Giving "The EntityReference could not be loaded because it is not attached to an ObjectContext." How do i complete this task in Entity Framework 3.5

[Code]....

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I have a stupid problem with the Entity Framework. I get the following Exception:

[Code]....

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