Parameterized in clause on list on strings

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How i cam do parameterized in clause on list of strings

What I have tried:

List<string> x= new List<string>(){"one","two","three"}
select * from Employee where EMP_NAME IN(@names)
How i can make the list of string object to parameterized value
I tried as select * from Employee where EMP_NAME IN(String.Join(",",x)) but it didn't worked as it making as('one,two.three') ideally it should be("one","two","three") any idea how i can achieve this

Posted 31-Mar-16 9:07am

MYQueries1

Updated 31-Mar-16 9:25am

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Richard Deeming · Answer 1 · 2016-03-31T09:25:00

If you're using .NET, try Dapper[^]:

C#

using (var connection = new SqlConnection("..."))
{
    var results = connection.Query<Employee>("SELECT * FROM Employee WHERE Emp_Name In @Names", new 
    { 
        Names = new List<string> { "One", "Two", "Three" }
    });
}

List Support[^]

If you can't use Dapper, you'll have to add each item as a separate parameter:

C#

using (var connection = new SqlConnection("..."))
using (var command = new SqlCommand(string.Empty, connection))
{
    var sb = new StringBuilder();
    sb.Append("SELECT * FROM Employee WHERE Emp_Name In (");
    
    for (int index = 0; index < list.Count; index++)
    {
        if (index != 0) sb.Append(", ");
        
        string parameterName = "@Name" + index;
        command.Parameters.AddWithValue(parameterName, list[index]);
        sb.Append(parameterName);
    }
    
    sb.Append(')');
    command.CommandText = sb.ToString();
    
    ...
}