为什么要用原生的呢？
1、目的 原生出现浏览器兼容性问题 极少，不用测试多浏览兼容性 。需要考虑到市面上的其他垃圾浏览器。
2、性能不好 如果不考虑第一条 你可以换一种方式
直接上代码
.aspx页面
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> ???<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> ???<title>DEMO</title></head><body> ???<form id="form1" runat="server"> ???????????????<br /> ???????<br /> ???????<asp:Label ID="Label2" runat="server" Text="动态控件"></asp:Label> ???????<asp:PlaceHolder ID="phBody" runat="server"></asp:PlaceHolder> ???????<br /> ???????<br /> ???????<br /> ???????<br /> ???????<br /> ???????<asp:Button ID="btnAdd" runat="server" OnClick="btnAdd_Click" Text="加三个动态控件" /> ???????<asp:Button ID="btnDelLast" runat="server" OnClick="btnDelLast_Click" Text="删除后面三个" /> ???????<br /> ???????<br /> ???????<br /> ???????<br /> ???????<asp:Button ID="btnSave" runat="server" OnClick="btnSave_Click" Text="提交保存" /> ???????<br /> ???????<br /> ???????<asp:Label runat="server" ID="lbMsg" ForeColor="Red"></asp:Label> ???</form></body></html>
后台.cs代码
?protected void Page_Load(object sender, EventArgs e) ???????{ ???????????#region 初始化控件 ????????????if (ViewState["AddedControl"] == null) ???????????{ ???????????????ViewState["AddedControl"] = 1; ???????????????CreateControl(); ???????????} ???????????else ???????????{ ???????????????int cout = Convert.ToInt32(ViewState["AddedControl"]); ???????????????for (int i = 0; i < cout; i++) ???????????????{ ???????????????????CreateControl(); ???????????????} ???????????} ???????????#endregion ???????????if (!IsPostBack) ???????????{ ???????????} ???????} ???????/// <summary> ???????/// 给容器phBody创建动态控件 ???????/// </summary> ???????/// <param name="index"></param> ???????public void CreateControl() ???????{ ???????????Panel plBody = new Panel(); ???????????TextBox txt = new TextBox(); ???????????txt.Text = ""; ???????????plBody.Controls.Add(txt); ???????????TextBox txt2 = new TextBox(); ???????????txt2.Text = ""; ???????????plBody.Controls.Add(txt2); ???????????TextBox txt3 = new TextBox(); ???????????txt3.Text = ""; ???????????plBody.Controls.Add(txt3); ?????????????????????????phBody.Controls.Add(plBody); ???????} ???????//获取动态添加的控件值 ???????protected void btnSave_Click(object sender, EventArgs e) ???????{ ???????????System.Text.StringBuilder sb = new System.Text.StringBuilder(); ???????????for (int i = 0; i < phBody.Controls.Count; i++) ???????????{ ???????????????Control ctrl = phBody.Controls[i]; ???????????????for (int j = 0; j < ctrl.Controls.Count; j++) ???????????????{ ???????????????????if (j <= 3) ???????????????????{ ???????????????????????TextBox txt = ctrl.Controls[j] as TextBox; ???????????????????????if (txt != null) ???????????????????????{ ???????????????????????????sb.Append(txt.Text); ???????????????????????} ???????????????????} ???????????????} ???????????} ???????????lbMsg.Text = sb.ToString(); ???????} ???????//加三行 ???????protected void btnAdd_Click(object sender, EventArgs e) ???????{ ???????????if (ViewState["AddedControl"] == null) ???????????{ ???????????????ViewState["AddedControl"] = 1; ???????????} ???????????else ???????????{ ???????????????int cout = Convert.ToInt32(ViewState["AddedControl"]); ???????????????ViewState["AddedControl"] = cout + 1; ???????????} ???????????CreateControl(); ???????} ???????//删除最后一行动态添加的控件 ???????protected void btnDelLast_Click(object sender, EventArgs e) ???????{ ???????????int index = phBody.Controls.Count - 1; ???????????phBody.Controls.RemoveAt(index); ???????????if (ViewState["AddedControl"] == null) ???????????{ ???????????????ViewState["AddedControl"] = 0; ???????????} ???????????else ???????????{ ???????????????int cout = Convert.ToInt32(ViewState["AddedControl"]); ???????????????ViewState["AddedControl"] = cout - 1; ???????????} ???????}
预览效果
asp.net动态增加服务器端控件并提交表单
原文地址：http://www.cnblogs.com/LoveTX/p/7465728.html