Select All Rows Using Entity Framework

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]();
ptx.[tablename].Select(????)

what goes in the ????

You can use:

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

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`.

You can simply iterate through the DbSet context.tablename

foreach(var row in context.tablename)
Console.WriteLn(row.field);

or to evaluate immediately into your own list

var allRows = context.tablename.ToList();

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

`_repository.[tablename].ToList();`

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.


----------


**For newbies to Entity Framework, it is like :**




PortalEntities context = new PortalEntities();
var users = context.Users;
This will **select all rows** in Table `User`

You can use this code to select all rows :


C# :

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

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:

```csharp
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);
}
```

Here is a few ways to do it (Just assume I'm using Dependency Injection for the DbConext)

public class Example
{
private readonly DbContext Context;

public Example(DbContext context)
{
Context = context;
}

public DbSetSampleOne[] DbSamples { get; set; }

public void ExampleMethod DoSomething()
{
// Example 1: This will select everything from the entity you want to select
DbSamples = Context.DbSetSampleOne.ToArray();

// Example 2: If you want to apply some filtering use the following example
DbSamples = Context.DbSetSampleOne.ToArray().Where(p => p.Field.Equals("some filter"))

}

If it's under a `async` method then use `ToListAsync()`

```
public async Task<List<DocumentTypes>> GetAllDocumentTypes()
{
var documentTypes = await _context.DocumentTypes.ToListAsync();

return documentTypes;
}
```