Question

I have 2 fields for sorting: Product Name and Price plus 2 options: ascending or descending.

User can specify sort order by setting 2 checkboxes: Price checkbox on or off and ascending checkbox on or off.

How do I code the orderby clause when the sorting order is dynamically set based on settings of the 2 above checkboxes? Thanks.

Answer 1

You can build the query by conditionally specifying OrderBy clauses:

var query = from product in db.Products select product;

if(price.Checked && ascending.Checked)
{
    query = query.OrderBy(product => product.Price);
}
else if(price.Checked && !ascending.Checked)
{
    query = query.OrderByDescending(product => product.Price);
}
else if(!price.Checked && ascending.Checked)
{
    query = query.OrderBy(product => product.Name);
}
else
{
    query = query.OrderByDescending(product => product.Name);
}