遍历页面控件

zoukankan html css js c++ java

遍历页面控件

普通aspx页面：

页面所有元素

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Web._Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Controls</title>
</head>

System.Web.UI.LiteralControl-
System.Web.UI.HtmlControls.HtmlHead-
System.Web.UI.LiteralControl-
System.Web.UI.HtmlControls.HtmlForm-form1
System.Web.UI.LiteralControl-

<body>
    <form id="form1" runat="server">
    <div>
        <asp:Button ID="Button1" runat="server" Text="Button" />
        <asp:LinkButton ID="LinkButton1" runat="server">LinkButton</asp:LinkButton>
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
    </div>
    </form>
</body>
</html>

呈现最顶层控件元素代码

foreach (Control control in Page.Controls)
{
    Response.Write(control.GetType().ToString() + "-<b>" + control.ID + "</b><br/>");
}



显示结果（不包含子控件）

System.Web.UI.LiteralControl-
System.Web.UI.HtmlControls.HtmlHead-
System.Web.UI.LiteralControl-
System.Web.UI.HtmlControls.HtmlForm-form1
System.Web.UI.LiteralControl-

取页面所有控件元素，包含子控件

取页面所有控件元素

        protected StringBuilder conInfo = new StringBuilder();

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                outputControl(Page.Controls, 0);
            }

            Response.Write(conInfo.ToString());
        }
        protected void outputControl(ControlCollection controls, int depth)
        {
            foreach (Control control in controls)
            {
                conInfo.Append(string.Format("<br/>{0}>", new string('-', depth * 4)));

                conInfo.Append(string.Format("{0}(<b>编号：{1}</b>)", control.GetType().ToString(),control.ID));

                if (control.Controls.Count>0&&control.Controls!=null)
                {
                    conInfo.Append(string.Format("(拥有{0}个子控件)", control.Controls.Count));

                    outputControl(control.Controls, depth + 1);
                }
            }
        }

显示结果

呈现页面所有控件元素

>System.Web.UI.LiteralControl(编号：)
>System.Web.UI.HtmlControls.HtmlHead(编号：)(拥有1个子控件)
---->System.Web.UI.HtmlControls.HtmlTitle(编号：)
>System.Web.UI.LiteralControl(编号：)
>System.Web.UI.HtmlControls.HtmlForm(编号：form1)(拥有9个子控件)
---->System.Web.UI.LiteralControl(编号：)
---->System.Web.UI.WebControls.Button(编号：Button1)
---->System.Web.UI.LiteralControl(编号：)
---->System.Web.UI.WebControls.LinkButton(编号：LinkButton1)
---->System.Web.UI.LiteralControl(编号：)
---->System.Web.UI.WebControls.TextBox(编号：TextBox1)
---->System.Web.UI.LiteralControl(编号：)
---->System.Web.UI.WebControls.Label(编号：Label1)
---->System.Web.UI.LiteralControl(编号：)
>System.Web.UI.LiteralControl(编号：)

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原文地址：https://www.cnblogs.com/_dragon/p/1656286.html