Interface ISelectionQuery<T>

Interface which describe query for calling selects methods.

Inherited Members
Namespace: Kros.KORM.Query
Assembly: Kros.KORM.dll
Syntax
public interface ISelectionQuery<T> : IFromQuery<T>, IProjectionQuery<T>, IQueryBase<T>, IOrderedQueryable<T>, IQueryable<T>, IEnumerable<T>, IOrderedQueryable, IQueryable, IEnumerable
Type Parameters
Name Description
T

Entity type.

Methods

Select(String)

Add select part to sql.

Declaration
IFromQuery<T> Select(string selectPart)
Parameters
Type Name Description
System.String selectPart

The columns for select clausule. (Separate by ,)
Returns
Type Description
IFromQuery<T>

Query for enumerable models.
Remarks

When Select method is not call, query take columns by T model.

Examples
                var people = database.Query<Person>().Select("Id, FirstName");
Exceptions
Type Condition
System.ArgumentNullException

if sqlPart is null or white string.

Select(String[])

Add columns to sql.

Declaration
IFromQuery<T> Select(params string[] columns)
Parameters
Type Name Description
System.String[] columns

The columns for select clausule.
Returns
Type Description
IFromQuery<T>

Query for enumerable models.
Remarks

When Select method is not call, query take columns by T model.

Examples
                var people = database.Query<Person>().Select("Id", "FirstName");

Select<TResult>(Func<T, TResult>)

Add columns to sql

Declaration
IFromQuery<T> Select<TResult>(Func<T, TResult> selector)
Parameters
Type Name Description
System.Func<T, TResult> selector

The selector.
Returns
Type Description
IFromQuery<T>

Query for enumerable models.
Type Parameters
Name Description
TResult

The type of the result.
Remarks

When Select method is not call, query take columns by T model.

Examples
                var people = database.Query<Person>().Select(p => new { p.Id, p.FirstName });
Exceptions
Type Condition
System.ArgumentNullException

if selector is null.

See Also