<%@ Page Language="C#" %><script runat="server">protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack) ViewState["Count"]=0; else for(int i=1;i<=(int)ViewState["Count"];i++)
{ addproduct(i.ToString());
}
} void addproduct(string num) { LiteralControl mylabel; TextBox mybox = new TextBox(); mylabel = new LiteralControl(); mylabel.Text = "<p>" + "产品:" + num; PlaceHolder1.Controls.Add(mylabel); mybox = new TextBox(); mybox.ID = "txtProduct" + num; PlaceHolder1.Controls.Add(mybox); }protected void add_btn(object sender, EventArgs e){ int count =(int)ViewState["Count"]; count++; ViewState["Count"] = count; addproduct(ViewState["Count"].ToString());}</script><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>动态添加控件</title></head><body style="font-size: 12px;"> <form id="form1" runat="server"> <div> <asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder> <br /> <asp:Button ID="Button1" runat="server" Text="增加" OnClick="add_btn" /> </form></body></html> Server.MapPath所在命名空间
System.Web.HttpContext.Current.Server.MapPath