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Why does
scIns.Parameters.Add(new SqlParameter("@v30", 0.00m));
lead to a “@v30 undefined” error, but
decimal dZero = 0.00m;
scIns.Parameters.Add(new SqlParameter("@v30", dZero));
works OK?
SqlParamter has two different overloads with two parameters, first being string and second being SqlDbType or object.
In the first case when 0.00m gets passed in it gets converted to Int64, and in the second case because the value passed in is of type decimal it then used the SqlDbType.Decimal.
Check out this Link
Update :
Found another stackoverflow Question that talks about this and has a detailed answer. 🙂