public static DataSet Search(Entity.WeaponInfo Search)
       {
           SqlConnection conn = new SqlConnection("Server=.; Integrated Security=True; Database=WeaponSalesMng");
           SqlCommand cmd = new SqlCommand("select * from WeapInfo where WeapName=@WeapName", conn);
           cmd.Parameters.Add(new SqlParameter("@WeapName", Search.Name));
           conn.Open();
           DataSet ds = new DataSet();
           SqlDataAdapter da = new SqlDataAdapter(cmd.CommandText, conn);
           da.Fill(ds,"WeapInfo");//在这里提示必须声明标量变量@WeapName
           da.FillSchema(ds, SchemaType.Source, "WeapInfo");
           DataTable table = ds.Tables["WeapInfo"];
           conn.Close();
           return ds;
       }