QueryAll

This method queries all rows from a table.

Code Snippets

The following example fetches all rows from the [dbo].[Person] table.

using (var connection = new SqlConnection(connectionString))
{
    var people = connection.QueryAll<Person>();
}

Targeting a Table

To target a specific table, pass the literal table name.

using (var connection = new SqlConnection(connectionString))
{
    var people = connection.QueryAll<Person>("[dbo].[Person]");
}

Or via dynamics:

using (var connection = new SqlConnection(connectionString))
{
    var people = connection.QueryAll("[dbo].[Person]");
}

The result is a list of dynamic objects of type ExpandoObject.

Specific Columns

To query specific columns, pass a list of fields in the fields argument.

using (var connection = new SqlConnection(connectionString))
{
    var fields = Field.Parse<Person>(e => new
    {
        e.Id,
        e.Name,
        e.DateOfBirth,
        e.DateInsertedUtc
    });
    var people = connection.QueryAll<Person>(fields: fields);
}

Or via dynamics:

using (var connection = new SqlConnection(connectionString))
{
    var people = connection.Query("[dbo].[Person]",
        fields: Field.From("Id", "Name", "DateOfBirth", "DateInsertedUtc"));
}

Type Result

The result set can be inferred directly as a string column.

using (var connection = new SqlConnection(connectionString))
{
    var names = connection.QueryAll<string>(ClassMappedNameCache.Get<Person>(),
        fields: Field.From(nameof(Person.Name))).FirstOrDefault();
}

Type inference works for string but not for other non-class types (e.g., long, int, System.DateTime), since TEntity is constrained to class. Use ExecuteQuery for those types.

Table Hints

Pass a table hint via the hints argument.

using (var connection = new SqlConnection(connectionString))
{
    var people = connection.QueryAll<Person>(hints: "WITH (NOLOCK)");
}

Or use the SqlServerTableHints class.

using (var connection = new SqlConnection(connectionString))
{
    var people = connection.QueryAll<Person>(hints: SqlServerTableHints.TabLock);
}

Ordering the Results

Pass an array of OrderField objects in the orderBy argument.

using (var connection = new SqlConnection(connectionString))
{
    var orderBy = OrderField.Parse(new
    {
        LastName = Order.Descending,
        FirstName = Order.Ascending
    });
    var people = connection.QueryAll<Person>(orderBy: orderBy);
    // Process 'people' here
}

Caching the Results

Pass a literal string key in the cacheKey argument to cache the results.

using (var connection = new SqlConnection(connectionString))
{
    var people = connection.QueryAll<Person>(cacheKey: "CackeKey:AllPeople");
    // Process 'people' here
}

The default cache expiration is 180 minutes. Override it by passing an integer value in the cacheExpirationInMinutes argument.