復制代碼 代碼如下:

#region 返回按鈕
protected void btnReturn_Click(object sender, EventArgs e)
{
string url = Request.QueryString["Url"] == null ? "" : Request.QueryString["Url"].ToString();
Response.Redirect(url);
}
#endregion

復制代碼 代碼如下:

//在頁面加載事件中所加的代碼
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
/******下面的代碼一定要放在判斷是否是回發事件中，否則仍得不到效果******/
if (Request.UrlReferrer != null)
{
ViewState["retu"] = Request.UrlReferrer.ToString();
}
}
}

#region返回按鈕
protected void btnReturn_Click(object sender, EventArgs e)
{
string url = ViewState["retu"].ToString() == null ? "" : ViewState["retu"].ToString();
Response.Redirect(url);

}