功能
每点一次页面上的增加控件的Button, 增加一个TextBox到Panel中。点击取值的Button,可以获取前面增加的所有TextBox的值说明动态增加的控件,需要在PostBack时重新加载一次,在重复加载时,我们只需要指点控件的ID,其它属性可以不设定了。
CS CODE
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class AddTextBoxSample : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
ReLoadAddedTextBoxs();
}
//重新加载已经加载过的TextBox
private void ReLoadAddedTextBoxs()
{
for (int i = 1; i <= AddedTextBoxIds.Count; i++)
{
TextBox tb = new TextBox();
tb.ID = i.ToString();
Panel1.Controls.Add(tb);
}
}
private const string c_ids = "TextBoxIds";
///
/// 纪录下动态增加的TextBox的ID值
///
private ArrayList AddedTextBoxIds
{
get
{
if (ViewState[c_ids] == null)
ViewState[c_ids] = new ArrayList();
return ViewState[c_ids] as ArrayList;
}
set { ViewState[c_ids] = value; }
}
protected void BT_AddControl_Click(object sender, EventArgs e)
{
//获取现在要增加的TextBox的ID索引
string id = Convert.ToString(AddedTextBoxIds.Count + 1);
TextBox newBox = new TextBox();
newBox.Width = Unit.Pixel(200);
newBox.ID = id;
newBox.Text = "现在是增加的第" + id + "个TextBox";
Panel1.Controls.Add(newBox);
AddedTextBoxIds.Add(id); //纪录下新增加的TextBoxID,在下次PostBack时重新加载
}
protected void BT_GetControlsValue_Click(object sender, EventArgs e)
{
for (int i = 1; i <= AddedTextBoxIds.Count; i++)
{
TextBox tb = Panel1.FindControl(i.ToString()) as TextBox;
if (tb != null)
{
//这里是加载的TextBox的值
//tb.Text....
//tb.ID.....
}
}
}
}
HTML CODE
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="AddTextBoxSample.aspx.cs" Inherits="AddTextBoxSample" %>