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
