问题
I have always included the at sign in the parameter name when using AddWithValue, but I just noticed some code written by someone else that doesn't use it. Is one way more correct than the other?
cmd.Parameters.AddWithValue("ixCustomer", ixCustomer);
or
cmd.Parameters.AddWithValue("@ixCustomer", ixCustomer);
回答1:
No, both are equivalent in the end. I personally tend to use the notation with the @ sign myself, to be consistent with the T-SQL code for stored proc I write.
But as far as I know, both methods are fine for .NET apps interfacing with SQL Server.
来源：https://stackoverflow.com/questions/2313540/should-i-include-the-when-using-sqlcommand-parameters-addwithvalue