在C#中怎么调用带参数的存储过程啊？？

1)执行一个没有参数的存储过程的代码如下：SqlConnection conn=new SqlConnection(“connectionString”);SqlDataAdapter da = new SqlDataAdapter();da.selectCommand = new SqlCommand();da.selectCommand.Connection = conn;da.selectCommand.CommandText = "NameOfProcedure";da.selectCommand.CommandType = CommandType.StoredProcedure;(2)执行一个有参数的存储过程的代码如下SqlConnection conn=new SqlConnection(“connectionString”);SqlDataAdapter da = new SqlDataAdapter();da.selectCommand = new SqlCommand();da.selectCommand.Connection = conn;da.selectCommand.CommandText = "NameOfProcedure";da.selectCommand.CommandType = CommandType.StoredProcedure;param = new SqlParameter("@ParameterName", SqlDbType.DateTime);param.Direction = ParameterDirection.Input;param.Value = Convert.ToDateTime(inputdate);da.selectCommand.Parameters.Add(param);若需要添加输出参数：param = new SqlParameter("@ParameterName", SqlDbType.DateTime);param.Direction = ParameterDirection.Output;param.Value = Convert.ToDateTime(inputdate);da.selectCommand.Parameters.Add(param);若要获得参储过程的返回值：param = new SqlParameter("@ParameterName", SqlDbType.DateTime);param.Direction = ParameterDirection.ReturnValue;