LINQ Implementation of CASE Statements
In LINQ, you can use conditional statements to simulate the functionality of CASE statements found in SQL. Let's examine a specific example:
osc_products.products_quantity = CASE WHEN itempromoflag 'N' THEN 100000 WHEN itemcat1 IN ('1','2','31') AND itemsalestatus = 'S' THEN 100000 WHEN itemsalestatus = 'O' THEN 0 ELSE cds_oeinvitem.itemqtyonhand - cds_oeinvitem.itemqtycommitted END
To convert this CASE statement to LINQ, you can use the following approach:
// Linq syntax var query = from items in db.cdsItems where items.ItemHandHeldFlag.Equals("Y") && items.ItemQtyOnHand - items.ItemQtyCommitted > 0 select items; // Alternate lambda syntax with expression body var query2 = db.cdsItems .Where(items => items.ItemHandHeldFlag.Equals("Y") && (items.ItemQtyOnHand - items.ItemQtyCommitted > 0)) .Select(items => items);
This query effectively simulates the CASE statement behavior and updates the stock status from production to the commerce site as intended.
Note that LINQ provides a more concise and maintainable way to handle conditional statements compared to using CASE statements in SQL. It allows you to use a single statement to evaluate multiple conditions and produce the desired output.
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