Select All Rows Using Entity Framework

Question

I\'m trying to select all the rows out of a database using entity framework for manipulation before they\'re sent to the form

var ptx = [modelname].[tablename]()         


        

Answer 1

How about:

using (ModelName context = new ModelName())
{
    var ptx = (from r in context.TableName select r);
}

ModelName is the class auto-generated by the designer, which inherits from ObjectContext.

Answer 2

You can use this code to select all rows :

C# :

var allStudents = [modelname].[tablename].Select(x => x).ToList();

Answer 3

Old post I know, but using Select(x => x) can be useful to split the EF Core (or even just Linq) expression up into a query builder.

This is handy for adding dynamic conditions.

For example:

public async Task<User> GetUser(Guid userId, string userGroup, bool noTracking = false)
{
    IQueryable<User> queryable = _context.Users.Select(x => x);

    if(!string.IsNullOrEmpty(userGroup))
        queryable = queryable.Where(x => x.UserGroup == userGroup);

    if(noTracking)
        queryable = queryable.AsNoTracking();

    return await queryable.FirstOrDefaultAsync(x => x.userId == userId);
}

Answer 4

You can use:

ptx.[tablename].Select( o => true)

Answer 5

I used the entitydatasource and it provide everything I needed for what I wanted to do.

_repository.[tablename].ToList();

Answer 6

Entity Framework has one beautiful thing for it, like :

var users = context.Users; 

This will select all rows in Table User, then you can use your .ToList() etc.

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For newbies to Entity Framework, it is like :

PortalEntities context = new PortalEntities();
var users = context.Users;

This will select all rows in Table User