我怎样才能回到ASP.Net和C＃的上一页

Question

想象一下，我有一个按钮“OnClick="GoBack"”我希望它转到上一页，C＃功能代码将如何显示？

Answer 1

protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
ViewState["RefUrl"] = Request.UrlReferrer.ToString();
}
}
protected void GoBack_Click(object sender, EventArgs e)
{
object refUrl = ViewState["RefUrl"];
if (refUrl != null)
{
Response.Redirect((string)refUrl);
}
}