How do I perform an insert and return inserted identity with Dapper?

Question

How do I perform an insert to database and return inserted identity with Dapper?

I\'ve tried something like this:

string sql = \"DECLARE @ID int; \"          


        

Answer 1

The InvalidCastException you are getting is due to SCOPE_IDENTITY being a Decimal(38,0).

You can return it as an int by casting it as follows:

string sql = @"
INSERT INTO [MyTable] ([Stuff]) VALUES (@Stuff);
SELECT CAST(SCOPE_IDENTITY() AS INT)";

int id = connection.Query(sql, new { Stuff = mystuff}).Single();