How to pass an array into a SQL Server stored procedure

Question

How to pass an array into a SQL Server stored procedure?

For example, I have a list of employees. I want to use this list as a table and join it with another table.

Answer 1

This will help you. :) Follow the next steps,

1. Open the Query Designer

2. Copy Paste the Following code as it is,it will create the Function which convert the String to Int

   CREATE FUNCTION dbo.SplitInts
   (
      @List      VARCHAR(MAX),
      @Delimiter VARCHAR(255)
   )
   RETURNS TABLE
   AS
     RETURN ( SELECT Item = CONVERT(INT, Item) FROM
         ( SELECT Item = x.i.value('(./text())[1]', 'varchar(max)')
           FROM ( SELECT [XML] = CONVERT(XML, ''
           + REPLACE(@List, @Delimiter, '') + '').query('.')
             ) AS a CROSS APPLY [XML].nodes('i') AS x(i) ) AS y
         WHERE Item IS NOT NULL
     );
   GO
   

3. Create the Following stored procedure

    CREATE PROCEDURE dbo.sp_DeleteMultipleId
    @List VARCHAR(MAX)
    AS
    BEGIN
         SET NOCOUNT ON;
         DELETE FROM TableName WHERE Id IN( SELECT Id = Item FROM dbo.SplitInts(@List, ',')); 
    END
    GO
   

4. Execute this SP Using exec sp_DeleteId '1,2,3,12' this is a string of Id's which you want to delete,

5. You convert your array to string in C# and pass it as a Stored Procedure parameter

   int[] intarray = { 1, 2, 3, 4, 5 };  
   string[] result = intarray.Select(x=>x.ToString()).ToArray();
   

    

   SqlCommand command = new SqlCommand();
   command.Connection = connection;
   command.CommandText = "sp_DeleteMultipleId";
   command.CommandType = CommandType.StoredProcedure;
   command.Parameters.Add("@Id",SqlDbType.VARCHAR).Value=result ;
   

This will delete multiple rows, All the best