Когда я нажимаю кнопку «Удалить», я намерен удалить Панель, затем перебрать оставшиеся панели и присвоить им новый идентификатор с нуля. если бы я удалил Panel (3) из списка из 6 панелей, я бы перебрал и дал им все новые идентификаторы Panels 0-5.
Моя проблема в том, что я продолжаю сталкиваться с ошибкой после того, как удаляю панель, где у меня есть дубликаты имен ID. Что касается моей жизни, я не могу видеть, где я иду не так, поэтому я протягиваю руку, надеясь, что я просто слепой или за советом.
Я устанавливал точку останова в своей функции btnDelete и проходил через нее, но не вижу своего логического недостатка в том, почему у меня возникает проблема с несколькими панелями с одинаковым идентификатором.
ASPX:
<%@ Page Title="" Language="C#" MasterPageFile="~/MasterPage/MasterPage.master" AutoEventWireup="true" CodeFile="Search.aspx.cs" Inherits="Search" EnableTheming="true" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
<link href="App_Themes/ui-lightness/jquery-ui-1.7.2.custom.css" rel="stylesheet"
type="text/css" />
<link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/base/jquery-ui.css"
rel="stylesheet" type="text/css" />
<script src="Includes/JavaScript/jquery-1.7.1.js" type="text/javascript"></script>
<script src="Includes/JavaScript/jquery.ui.datepicker.js" type="text/javascript"></script>
<script src="Includes/JavaScript/jquery.ui.widget.js" type="text/javascript"></script>
<script src="Includes/JavaScript/jquery.ui.core.js" type="text/javascript"></script>
<%--Script for the Dropdown Datepicker--%>
<script type="text/javascript">
$(function () {
$("input.datepicker").datepicker({ showOn: 'button', buttonImage: 'Includes/Images/calender.gif', buttonImageOnly: false, onSelect: function () { }
});
});
</script>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder2" runat="Server">
<h1>
Search
<asp:HyperLink ID="HyperLink1" runat="server" ImageUrl="Includes/Images/action_help.gif"
NavigateUrl="~/user_manual.pdf" Target="_blank" ToolTip="Search Help"></asp:HyperLink></h1>
<table border="0" cellpadding="6" cellspacing="0">
<tr>
<td>
<asp:Button ID="btnAdd" runat="server" Text="Add Control" onclick="btnAdd_Click" />
<asp:Button ID="btnClear" runat="server" Text="Reset" onclick="btnClear_Click" />
<asp:Button ID="btnSearch" runat="server" Text="Search" OnClick="btnSearch_Click" />
</td>
<td>
<asp:TextBox ID="txtTitle" class="searchPage" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<asp:PlaceHolder ID="myPlaceholder" runat="server"></asp:PlaceHolder>
</td>
Код:
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Runtime.Serialization;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
public partial class Search : BasePage
{
List<Users> userroles = new List<Users>();
//Panel that contains all our Dynamically added user controls.
List<Panel> persistControls = new List<Panel>();
public int userid = 0;
public byte IsActive = 1;
public int error = 0;
protected override void OnInit(EventArgs e)
{
base.OnInit(e);
}
// Calls three functions responsible for pulling from the Database and binding the Datagrid.
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
GetClustersFromDB(userid);
BindGrid();
BindState();
}
else
{
// Where I am recreating my controls.
DynamicQueryRecreateLogic();
}
}
protected void DynamicQueryRecreateLogic()
{
if (Session["persistControls"] != null)
{
// Local Value that contains the members of the current persistControls session, not yet pushed to the page.
persistControls = (List<Panel>)Session["persistControls"];
int count = 0;
foreach (Panel panel in persistControls)
{
//AddQuestionTypeDropDownList(count);
panel.ID = "panel" + "(" + count.ToString() + ")";
foreach (Control control in panel.Controls)
{
if (control.GetType() == typeof(DropDownList))
{
control.ID = "list" + "(" + count.ToString() + ")";
DropDownList list = (DropDownList)panel.FindControl(control.ID);
list.SelectedIndexChanged += new EventHandler(list_SelectedIndexChanged);
}
if (control.GetType() == typeof(TextBox))
{
control.ID = "txtBox" + "(" + count.ToString() + ")";
}
}
// Re-Adding our Remove Button
Button btnRemove = new Button();
btnRemove.Click += new EventHandler(btnDelete_Click);
btnRemove.Text = "Remove";
btnRemove.CommandArgument = count.ToString();
// Pushing to Placeholder
myPlaceholder.Controls.Add(panel);
myPlaceholder.Controls.Add(btnRemove);
count++;
}
}
}
private DropDownList AddQuestionTypeDropDownList()
{
DropDownList list = new DropDownList();
list.ID = "list" + "(" + persistControls.Count.ToString() + ")";
list.Items.Add(new ListItem("--Select One--", ""));
list.Items.Add(new ListItem("Title", "1"));
list.Items.Add(new ListItem("Contact", "2"));
list.Items.Add(new ListItem("Date Created", "3"));
list.SelectedIndexChanged += new EventHandler(list_SelectedIndexChanged);
list.AutoPostBack = true;
return list;
}
private TextBox AddFieldTypeTextBox(int count)
{
TextBox box = new TextBox();
box.ID = "txtBox" + "(" + count.ToString() + ")";
return box;
}
protected void btnAdd_Click(object sender, EventArgs e)
{
try
{
Panel panelContainer = new Panel();
panelContainer.ID = "panel" + "(" + persistControls.Count.ToString() + ")";
panelContainer.Controls.Add(AddQuestionTypeDropDownList());
Button btnRemove = new Button();
btnRemove.Click += new EventHandler(btnDelete_Click);
btnRemove.Text = "Remove";
btnRemove.CommandArgument = persistControls.Count.ToString();
persistControls.Add(panelContainer);
myPlaceholder.Controls.Add(panelContainer); // Pushes the Panel to the page.
myPlaceholder.Controls.Add(btnRemove); // Pushes our Button to the page.
Session["persistControls"] = persistControls; // put it in the session
}
catch
{
throw;
}
}
protected static string DecipherCountNumber(string IDHolder)
{
int start = IDHolder.IndexOf("(");
if (start == -1)
{
return IDHolder;
}
else
{
return IDHolder.Substring(start + 1).Replace(")", string.Empty);
}
}
protected void list_SelectedIndexChanged(object sender, EventArgs e)
{
//I need to fix the dynamic Add location. I need to track some type of enumeration or attributes of the panel for recreation.
try
{
DropDownList list = (DropDownList)sender;
string IDHolder = list.ID.ToString();
int count = Convert.ToInt32(DecipherCountNumber(IDHolder));
Panel panelContainer = persistControls.Find(delegate(Panel panel) { return panel.ID == "panel" + "(" + count.ToString() + ")"; });
if (list.SelectedIndex == 1)
{
//panelContainer.Controls.Add(AddFieldTypeTextBox(count));
}
if (list.SelectedIndex == 2)
{
//panelContainer.Controls.Remove(FindControl("txtBox" + "(" + count.ToString() + ")"));
}
if (list.SelectedIndex == 3)
{
//panelContainer.Controls.Remove(FindControl("txtBox" + "(" + count.ToString() + ")"));
}
Session["persistControls"] = persistControls;
}
catch
{
throw;
}
}
protected void btnClear_Click(object sender, EventArgs e)
{
try
{
Session["persistControls"] = null;
Response.Redirect(Request.Url.ToString());
}
catch
{
throw;
}
}
protected void btnDelete_Click(object sender, EventArgs e)
{
try
{
int deleteThisOne = int.Parse(((Button)sender).CommandArgument);
persistControls.Remove(persistControls[deleteThisOne]);
Session["persistControls"] = persistControls;
Response.Redirect(Request.Url.ToString(), false);
}
catch
{
throw;
}
}