protected void btnSelect_Click(object sender, EventArgs e)
        {
            TestModle modle = new TestModle();

            modle.TestName   = ddlTestName.SelectedValue;
            modle.TestCourse = ddlTestCourse.SelectedValue;
            modle.TestClass  = ddlTestClass.SelectedValue;
            modle.Test       = ddlTest.SelectedValue;
            if (testbll.Add(modle) > 0)
            {
                Response.Write("<script language='javascript'>alert('添加成功');</script>");
            }
            else
            {
                Response.Write("<script language='javascript'>alert('添加成功');</script>");
            }
        }