int a = 12345678;//格式为sring输出Label1.Text =string.Format("asdfadsf{0}adsfasdf",a);Label2.Text ="asdfadsf"+a.ToString()+"adsfasdf";Label1.Text =string.Format("asdfadsf{0:C}adsfasdf",a);//asdfadsf¥1,234.00adsfasdfLabel2.Text= "asdfadsf"+a.ToString("C")+"adsfasdf";//asdfadsf¥1,234.00adsfasdfdouble b= 1234.12543...