Replicating the 'IN' operator in LINQ

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We often use the 'IN' Operator to specify multiple values in the WHERE clause. What if you have to do something similar in LINQ. Here's a simple example that demonstrates this. The example searches out the desired pincodes in a list of Booth Addresses.

C#

var pinCodes = new[] { 411021, 411029, 411044 };

var Booths = new[] {

    new { BoothName = "Booth1", PinCode = 411011 },

    new { BoothName = "Booth2", PinCode = 411021},

    new { BoothName = "Booth3", PinCode = 411029 },

    new { BoothName = "Booth4", PinCode = 411044 },

    new { BoothName = "Booth5", PinCode = 411056 },

    new { BoothName = "Booth6", PinCode = 411023 },

    new { BoothName = "Booth7", PinCode = 411024 }

};

 

var whereAmI = from booth in Booths

              join pins in pinCodes

              on booth.PinCode equals pins

              select booth;

VB.NET

        Dim pinCodes = New Integer() {411021, 411029, 411044}

        Dim Booths = New Object() _

        {New With {Key .BoothName = "Booth1", Key .PinCode = 411011}, _

        New With {Key .BoothName = "Booth2", Key .PinCode = 411021}, _

        New With {Key .BoothName = "Booth3", Key .PinCode = 411029}, _

        New With {Key .BoothName = "Booth4", Key .PinCode = 411044}, _

        New With {Key .BoothName = "Booth5", Key .PinCode = 411056}, _

        New With {Key .BoothName = "Booth6", Key .PinCode = 411023}, _

        New With {Key .BoothName = "Booth7", Key .PinCode = 411024}}

 

        Dim whereAmI = _

         From booth In Booths _

         Join pins In pinCodes On booth.PinCode Equals pins _

         Select booth

OUTPUT



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About The Author

Suprotim Agarwal, Developer Technologies MVP (Microsoft Most Valuable Professional) is the founder and contributor for DevCurry, DotNetCurry and SQLServerCurry. He is the Chief Editor of a Developer Magazine called DNC Magazine. He has also authored two Books - 51 Recipes using jQuery with ASP.NET Controls. and The Absolutely Awesome jQuery CookBook.

Follow him on twitter @suprotimagarwal.