Replicating the 'IN' operator in LINQ

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, ASP.NET Architecture MVP works as an Architect Consultant and provides consultancy on how to design and develop Web applications.

Suprotim is also the founder and primary contributor to DevCurry, DotNetCurry and SQLServerCurry. He has also written an EBook 51 Recipes using jQuery with ASP.NET Controls.

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