为什么Response.Write没有跳出,怎么解决啊

Question

OracleDataAccess oda = new OracleDataAccess();
        string sql = "insert into TBL_TeachChapter(BrfNo,ChapNo,ChapName,Hour) " +
            "values(:BrfNo,:ChapNo,:ChapName,:Hour)";
        OracleParameter[] ops =
            {   
               new OracleParameter(":BrfNo",tc.BrfNo),
               new OracleParameter(":ChapNo",tc.ChapNo),
               new OracleParameter(":ChapName",tc.ChapName),
               new OracleParameter(":Hour",tc.Hour)
            };
        try
        {
            oda.ExecuteNonQuery(sql, ops);
            Response.Redirect("../../RedirectPage.aspx?RedirectPath=" + "./CourseManage/OutLine/AddTeachChapter.aspx");
            this.grdChap.Visible = true;
            btnAddChapter.Visible = true;
            this.tbAddTable.Visible = false;
        }
        catch(Exception ex) 
        {
            Response.Write("<script>数据重复</script>");
        }
 Response.Redirect("../../RedirectPage.aspx?RedirectPath=" + "./CourseManage/OutLine/AddTeachChapter.aspx");
            this.grdChap.Visible = true;
            btnAddChapter.Visible = true;
            this.tbAddTable.Visible = false;

Answer 1

因为你的页面已经 Redirect了

Answer 2

catch(Exception ex) 
        {
            Response.Write("<script>alert('数据重复');window.location.href='"+ 
"../../RedirectPage.aspx?RedirectPath=" + "./CourseManage/OutLine/AddTeachChapter.aspx';</script>");
        }
去掉最后的这几行. Response.Redirect("../../RedirectPage.aspx?RedirectPath=" + "./CourseManage/OutLine/AddTeachChapter.aspx");
            this.grdChap.Visible = true;
            btnAddChapter.Visible = true;
            this.tbAddTable.Visible = false;

Answer 3

这是因为客户端代码还没来得及输出
就已经被Redirect了
一个办法
就是你把后面的Redirect代码也用js脚本代替 再写一个Response.Write
内容是
<script>location.replace(xxxx)</script>
具体函数用法查阅JS文档

Answer 4

Response.Redirect("../../RedirectPage.aspx?RedirectPath=" + "./CourseManage/OutLine/AddTeachChapter.aspx");
            this.grdChap.Visible = true;
            btnAddChapter.Visible = true;
            this.tbAddTable.Visible = false;
不管你异常没有都执行了上面的语句。如果一定要执行上面的语句最好加上个判断啊！！！