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我有以下嵌套結構。我需要的是根據RadioButtonList選項的值從後面的CustomControl1代碼中過濾一個DB Linq查詢。如何從嵌套內部控件查找外部控件
x MainPage1
x---- Panel1 (modal popup)
x--------- UpdatePanel (upMailOrStatusAction, on Panel1)
x-------------- RadioButtonList (rblActionLevel, on UpdatePanel)
x-------------- SubForm1 (on Panel1)
x------------------- CustomControl1 (on Subform1)
x------------------------ DropDownList (on CustomControl1)
我想類似下面找到了控制，但它說：「‘upMailOrStatusAction’這個名字不會在目前情況下存在。
RadioButtonList rbl = upMailOrStatusAction.FindControl("rblActionLevel") as RadioButtonList;
什麼是找到最好的辦法？！RadioButtonList控件是的，我與這個相當新
謝謝 吉姆薩瓦尼，GA
好，這裏是彈出ASPX：
<asp:Panel ID="pnlAddMailOrStatusAction" runat="server" CssClass="modalPopupLarge" Style="display: none;">
<asp:UpdatePanel ID="upMailOrStatusAction" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="false" RenderMode="Block">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="rblActionType" />
</Triggers>
<ContentTemplate>
<div class="borderDiv">
<table class="borderTable0" cellpadding="0" cellspacing="0" width="100%">
<thead>
<tr align="left">
<th colspan="9">Action Detail</th>
</tr>
</thead>
<tbody>
<tr>
<td colspan="1">
<label class="labelfield">Action Level:</label>
</td>
<td colspan="1" rowspan="1" align="left">
<asp:RadioButtonList ID="rblActionLevel" runat="server" AutoPostBack="True" RepeatDirection="Horizontal"
RepeatLayout="Flow">
<asp:ListItem Selected="True" Value="Base" Text="Base " />
<asp:ListItem Value="Coverage" Text="Coverage" />
</asp:RadioButtonList>
</td>
<td colspan="1" align="left">
<asp:Label ID="lblMSCoverage" runat="server" class="labelfield" Text="Coverage:" />
</td>
<td colspan="1" align="left">
<asp:Label ID="txtMSCoverage" runat="server" />
</td>
<td colspan="5">
</td>
</tr>
<tr>
<td colspan="9">
<hr />
</td>
</tr>
<tr>
<td colspan="9">
<st:MailAddSubform runat="server" ID="mailAddSubform" />
<st:StatusActionAddSubform runat="server" ID="statusActionAddSubform" Visible="false" />
</td>
</tr>
<tr>
<td colspan="9">
<hr />
</td>
</tr>
</tbody>
</table>
</div>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Panel>
這裏是子窗體的aspx：
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="MailAddSubform.ascx.cs"
Inherits="Company.Solutions.Web.Controls.MailAddSubform" %>
最後，這裏是背後的定製控件的代碼。查找StackOverflow以查找單選按鈕列表：
using System;
using System.Collections.Generic;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Linq.Expressions;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using Company.Solutions.Data;
using Company.Solutions.Data.Model;
using Company.Solutions.Business.ViewModels;
using Company.Solutions.Business.Helpers;
namespace Comapny.Solutions.Web.Controls
{
public partial class StMailActionLookup : System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
BindForm();
}
protected void BindForm()
{
IEnumerable actions = GetClaimMailActions(GetFilter());
ddlLookup.DataSource = actions;
ddlLookup.DataTextField = "CodeAndDescription";
ddlLookup.DataValueField = "actionCd";
ddlLookup.DataBind();
}
//protected void ddlLookup_DataBound1(object sender, System.EventArgs e)
//{
// ddlLookup.Items.Insert(0, new ListItem("<Please Choose an Action>", String.Empty));
//}
private MailActionFilters GetFilter()
{
MailActionFilters filters = new MailActionFilters();
if (chkForms.Checked)
filters |= MailActionFilters.Forms;
if (chkRequested.Checked)
filters |= MailActionFilters.RequestedInfo;
if (chkOther.Checked)
filters |= MailActionFilters.Other;
return filters;
}
public IEnumerable GetClaimMailActions(MailActionFilters filter)
{
RelationalDataContext db = RelationalDataContext.Create();
List<Expression<Func<ClaimMailAction, bool>>> predicates = new List<Expression<Func<ClaimMailAction, bool>>>();
const string MAIL_ACTIONS = "0";
const char FORMS = 'F';
const char REQUESTED_INFO = 'R';
const char EXCLUDE = 'X';
//StackOverflow help
//RadioButtonList rbl = (RadioButtonList) Control.Parent.FindControl("rblActionLevel");
if ((!chkForms.Checked && !chkRequested.Checked && !chkOther.Checked) | (chkForms.Checked && chkRequested.Checked && chkOther.Checked))
{
predicates.Add(cma => cma.ActionCd.StartsWith(MAIL_ACTIONS) && (cma.EsolutionsCode == null || cma.EsolutionsCode!= EXCLUDE));
} else {
if((filter & MailActionFilters.Forms) == MailActionFilters.Forms)
predicates.Add(cma => cma.ActionCd.StartsWith(MAIL_ACTIONS) && cma.EsolutionsCode == FORMS);
if((filter & MailActionFilters.RequestedInfo) == MailActionFilters.RequestedInfo)
predicates.Add(cma => cma.ActionCd.StartsWith(MAIL_ACTIONS) && cma.EsolutionsCode == REQUESTED_INFO);
if((filter & MailActionFilters.Other) == MailActionFilters.Other)
predicates.Add(cma => cma.ActionCd.StartsWith(MAIL_ACTIONS) && (cma.EsolutionsCode == null || (cma.EsolutionsCode != EXCLUDE && cma.EsolutionsCode != FORMS && cma.EsolutionsCode != REQUESTED_INFO)));
}
var predicate = PredicateBuilder.Make<ClaimMailAction>();
predicates.ForEach(delegate(Expression<Func<ClaimMailAction, bool>> expr)
{
predicate = predicate.Or(expr);
});
var qry = db.ClaimMailActions.Where(predicate).Select(c => new { c.ActionCd, CodeAndDescription = string.Format("{0} - {1}", c.ActionCd, c.ActionDesc) });
return qry.ToList();
}
}
}
新的代碼列表。我的同事將這個用於另一個查找。有人能告訴我如何爲這個查找做類似的事嗎？即使效率低下，如果它的效果如此。
HtmlForm form;
foreach(var ctl in Page.Controls[0].Controls)
{
if(ctl is HtmlForm)
{
form = ctl as HtmlForm;
ContentPlaceHolder holder = form.FindControl("DefaultContent") as ContentPlaceHolder;
if (holder != null)
{
PlaceHolder paymentControlHolder = holder.FindControl("plcPaymentForm") as PlaceHolder;
if (paymentControlHolder != null)
{
IListener listener;
foreach (var c in paymentControlHolder.Controls)
{
if (c is IListener)
{
listener = c as IListener;
rblPaymentType.SelectedIndexChanged += listener.AddHandler();
}
}
}
}
}
}
好吧，我想這一點，但還沒有完全想通了，但如何確定單選按鈕的選定值：
HtmlForm form;
foreach (var ctl in Page.Controls[0].Controls) {
if (ctl is HtmlForm) {
form = ctl as HtmlForm;
ContentPlaceHolder holder = form.FindControl("DefaultContent") as ContentPlaceHolder;
if (holder != null) {
RadioButtonList rblControlHolder = holder.FindControl("rblActionLevel") as RadioButtonList;
if (rblControlHolder != null) {
}
}
}
}
Juri， 目標僅僅是確定單選按鈕值，以便我可以修改我的查詢以相應地填充下拉列表。我會嘗試你的查詢以及它可能派上用場。 謝謝！ Jim – James 2009-09-03 12:58:22
如果你的radiobuttonlist在你的用戶控件或頁面上，你應該可以直接訪問它，不是嗎？或者至少是它的容器元素。我真的不明白爲什麼你必須從頁面向下遍歷所有內容。 – Juri 2009-09-03 13:08:01
順便說一句，下面的代碼可以通過調用我的FindControlRecursive（this.Page，「rblActionLevel」）作爲RadioButtonList來解決，儘管我仍然堅信有一個簡單的方法。 – Juri 2009-09-03 13:08:50