学步园

      利用判断__VIEWSTATE防止页面重复提交，废话不多说，直接贴代码：

初始定义变量

 private static string Flag__ViewState;

 protected void Page_Load(object sender, EventArgs e)
        {
             if (!IsPostBack)
            {
                Flag__ViewState = string.Empty;
            }
        }

提交：

 protected void btnSave_Click(object sender, EventArgs e)
        {
            if (Request.Headers["Accept"] != "*/*" && Request.Form["__VIEWSTATE"] != Flag__ViewState)
            {
                Flag__ViewState = Request.Form["__VIEWSTATE"];
                try
                {
                    xx ci = new xx();
                    ci.Save();
                    Page.ClientScript.RegisterClientScriptBlock(Page.GetType(), "good", "<script> alert('添加成功！');</script>");
                }
                catch (Exception)
                {
                    Page.ClientScript.RegisterClientScriptBlock(Page.GetType(), "faile", "<script> alert('添加失败！');</script>");
                }
                finally { Flag__ViewState = string.Empty; }
            }
        }

看不懂的，多用用就会了，还不会的面壁去。