How Can I Use CASE Statements (or Their Equivalent) in LINQ to Update Stock Status?

LINQ CASE Statements: A Closer Look

In LINQ queries, the CASE statement provides a concise way to evaluate multiple conditions and return different values based on the results. Understanding how to use CASE statements effectively is essential for writing complex LINQ queries.

In your specific case, you are attempting to use a CASE statement to update stock status for items from "production" to "commerce site." While your code correctly selects items with hand-held flags set to "Y" and available stock, it does not implement the CASE statement.

To incorporate the CASE statement in LINQ, you can utilize the ternary conditional operator (? :), which allows you to evaluate a condition and return different values based on the result. The syntax for the ternary conditional operator is:

condition ? value_if_true : value_if_false

In your case, the CASE statement can be expressed in LINQ as follows:

cdsDBDataContext db = new cdsDBDataContext();
var query = from items in db.cdsItems
            where items.ItemHandHeldFlag.Equals("Y")
            select new
            {
                Items = items,
                ProductsQuantity = items.ItemQtyOnHand - items.ItemQtyCommitted > 0 ? 100000 : 0
            };

This query updates the "ProductsQuantity" property of each item in the result set based on the conditions in the CASE statement. If the item has a positive available stock level, the "ProductsQuantity" is set to 100000; otherwise, it is set to 0.

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