Asp.net防止页面重复提交

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。