Stored procedure or function expects parameter which was not supplied

Question

I am trying to insert data into a SQL Server database by calling a stored procedure, but I am getting the error

*Procedure or function \'Insertion\'

Answer 1

You need to use SqlCommand.Parameters.AddWithValue:

cmd.Parameters.AddWithValue("@ParameterName", value);

or SqlCommand.Parameters.Add for other data types:

cmd.Parameters.Add("@ParameterName", SqlDbType.Int, 5);
cmd.Parameters["@ParameterName"].Value = value;

SqlCommand.Parameters.AddWithValue replaces the ambiguous overload of Add that took a string and object parameter. See MSDN for more info.