单击一按钮显示九九乘法表，输出格式我不会控制，请高手指点
protected void Button1_Click(object sender, EventArgs e)
    {
        int i, j;
        for (i = 1; i <= 9; i++)
        {
            for (j = 1; i <= j; j++)
            {
                Response.Write(i+"*"+j=i*j);
            }
        }
    }