“FindControl”问题在DataList中 [英] Problem with "FindControl" in DataList
本文介绍了“FindControl”问题在DataList中的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
I'm stuck in a very irritating problem. I tried this thing two months earlier also but had to change the approach after failure as I was in a hurry to complete the project. Now I'm in a vacation and want to solve the problem. I'm fed up with this. I'eve tried from many sources on the web. Most of the sources refer to the procedure I pasted below, but that doesn't work in my code. I wanna know what's wrong. :( Please please please help!!
the .aspx code is here :
<%@ Page Title="" Language="C#" MasterPageFile="~/SitePages/Master_LoggedIn.master" AutoEventWireup="true"
CodeFile="ChooseExam.aspx.cs" Inherits="ChooseExam" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder2" Runat="Server">
<asp:DataList ID="DataList1" runat="server" RepeatColumns="4" OnItemCommand="DataList1_ItemCommand"
RepeatDirection="Horizontal" Width="100%">
<HeaderTemplate>
<div style="text-align: center; height: 38px; background-color: #FFFFCC">
<span style="font-family: 'Bookman Old Style'; color: #003300">Click On
The Test You Want To Take</span></div>
</HeaderTemplate>
<ItemTemplate>
<table class="style1">
<tr>
<td>
<asp:LinkButton ID="LinkButton_ExamName" runat="server" BorderColor="Black"
style="font-family: 'Bookman Old Style'; color: #000000; text-decoration: none;"><%#Eval
("ExamName")%></asp:LinkButton>
</td>
</tr>
</table>
</ItemTemplate>
</asp:DataList>
<p>
The Chosen Exam is <asp:Label ID="Label_ExamName" runat="server"
style="font-family: 'Bookman Old Style'"></asp:Label>
</p>
</asp:Content>
and here's the .aspx.cs code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
public partial class ChooseExam : System.Web.UI.Page
{
ClassOnlineExamConnection con = new ClassOnlineExamConnection();
DataSet ds;
protected void Page_Load(object sender, EventArgs e)
{
Label_ExamName.Visible = false;
ds = new DataSet();
ds = con.dataFetch("Select ExamCode, ExamName From Exams");
DataList1.DataSource = ds;
DataList1.DataBind();
}
protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)
{
DataList1.SelectedIndex = e.Item.ItemIndex;
String A = ((LinkButton)e.Item.FindControl("LinkButton_ExamName")).Text;
Label_ExamName.Text = A;
Label_ExamName.Visible = true;
}
}
thank a lot in advance. I'll be grateful to you..
推荐答案
不要在每个帖子中绑定数据,请按以下步骤操作
don't bind data in each post back, do as below
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Label_ExamName.Visible = false;
ds = new DataSet();
ds = con.dataFetch("Select ExamCode, ExamName From Exams");
DataList1.DataSource = ds;
DataList1.DataBind();
}
}
同时更改链接按钮如下
Also change your link button as below
<asp:LinkButton ID="LinkButton_ExamName" CommandName="Select" CommandArgument='<%#Eval("ExamName")%>' runat="server" BorderColor="Black" tyle="font-family: 'Bookman Old Style'; color: #000000; text-decoration: none;"><%#Eval("ExamName")%></asp:LinkButton>
然后
then
protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)
{
if(e.CommandName ="Select")
{
var e = e.CommandArgument.ToString();
Label_ExamName.Text = e;
Label_ExamName.Visible = true;
}
}
这篇关于“FindControl”问题在DataList中的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文