问题是我创建了一个链接按钮 category_Click 的点击事件，在这个点击事件中我创建了多个动态控件，我创建了一个图像按钮 Image_Click 的点击事件，现在的问题是 Category_Click 事件正在触发但 Image_Click 事件没有触发。请帮帮我。
aspx 页面代码：-
<%@ Page Title="" Language="C#" MasterPageFile="~/Homepage.Master" AutoEventWireup="true" CodeBehind="Categories.aspx.cs" Inherits="WebApplication1.Categories" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
<link rel="Stylesheet" href="Genre.css" />
<link rel="Stylesheet" href="genre_content.css" />
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="categories" runat="server">
<asp:Panel ID="Panel2" runat="server"></asp:Panel>
</asp:Content>
<asp:Content ID="Content3" ContentPlaceHolderID="main" runat="server">
<asp:Panel ID="Panel1" runat="server">
<h2><asp:Label ID="Label1" class="h2" runat ="server" ></asp:Label></h2><br/>
</asp:Panel>
<asp:Panel ID="Panel3" runat="server">
<div class="data">
<div class="image">
<asp:Image ID="Image1" runat="server" Cssclass="Img" />
</div>
<div class="description">
<asp:Label ID="Name" runat="server" class="name"></asp:Label>
<asp:Label ID="Label2" runat="server" Text="(Paperback)"></asp:Label>
<div class="cos-shipping">
<div class="cos">
Rs.<asp:Label ID="cost" runat="server" CssClass="co" ></asp:Label>
</div>
<div class="shipping">
<p>Available</p>
<p>Ships within <b>4-6 Business Days</b></p>
<p>Rs.39 shipping in India per item and low cost Worldwide.</p>
</div>
</div>
<asp:Button ID="Button1" runat="server" Text="Buy Now" class="atc"/>
</div>
</div>
<div class="details">
<h2>Book Details</h2>
<asp:Label ID="about" runat="server" CssClass="about" ></asp:Label>
<p>Author: <asp:Label ID="author" runat="server" ></asp:Label> </p>
<p>ISBN: <asp:Label ID="isbn" runat="server" ></asp:Label> </p>
<p>Pubisher: <asp:Label ID="publisher" runat="server" ></asp:Label> </p>
<p>No of pages: <asp:Label ID="nop" runat="server" ></asp:Label> </p>
<p>Language: <asp:Label ID="language" runat="server" ></asp:Label> </p>
<p>Weight: <asp:Label ID="weight" runat="server" ></asp:Label> </p>
<p>Available For :<asp:Label ID="available" runat="server" ></asp:Label> </p>
</div>
</asp:Panel>
</asp:Content>
aspx.cs 页面代码：-
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Web.UI.HtmlControls;
namespace WebApplication1
{
public partial class Categories : System.Web.UI.Page
{
private string ide, SQL, SQL2, label;
private int num, i, num2, j;
private ImageButton image;
private LinkButton bookname;
private Label money;
private Label id;
private Button wishlist;
private LinkButton category;
private static DataSet ds, ds2;
private static SqlDataAdapter da, da2;
private static HtmlGenericControl Book;
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
SqlConnection con2 = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
protected void Page_Load(object sender, EventArgs e)
{
Panel3.Visible = false;
con2.Open();
SQL2 = "Select distinct Book_category from Book_List";
da2 = new SqlDataAdapter(SQL2, con2);
ds2 = new DataSet();
DataTable dt2 = new DataTable();
da2.Fill(ds2);
num2 = ds2.Tables[0].Rows.Count;
HtmlGenericControl header = new HtmlGenericControl("div");
header.Attributes.Add("class", "header");
Panel2.Controls.Add(header);
for (j = 0; j < num2; j++)
{
category = new LinkButton();
category.Text = ds2.Tables[0].Rows[j]["Book_category"].ToString();
category.Attributes.Add("runat", "server");
category.Attributes.Add("CausesValidation", "false");
category.Click += new EventHandler(Category_Click);
header.Controls.Add(category);
}
}
protected void Category_Click(object sender, EventArgs e)
{
label = ((LinkButton)sender).Text;
Label1.Text = label;
con.Open();
SQL = "Select * from Book_List where Book_category='" + label + "'";
da = new SqlDataAdapter(SQL, con);
ds = new DataSet();
da.Fill(ds);
num = ds.Tables[0].Rows.Count;
//creating div element and putting all the elements ina div called books
Book = new HtmlGenericControl("div");
Book.Attributes.Add("class", "books");
Panel1.Controls.Add(Book);
for (i = 0; i < num; i++)
{
//creating div element
HtmlGenericControl myDiv = new HtmlGenericControl("div");
myDiv.Attributes.Add("class", "myDiv");
//creating image button
image = new ImageButton();
image.ImageUrl = ds.Tables[0].Rows[i]["Book_image"].ToString();
image.CssClass = "Img";
image.Attributes.Add("runat", "server");
//image.UseSubmitBehaviour = false;
image.Attributes.Add("CausesValidation", "false");
//image.Attributes.Add("OnClick", "image_Click");
//image.OnClientClick = Panel3;
image.Click += new ImageClickEventHandler(Image_Click);
//creating div inside myDiv
HtmlGenericControl content = new HtmlGenericControl("div");
content.Attributes.Add("class", "content");
//creating a label to display id
id = new Label();
id.CssClass = "id";
id.Text = ds.Tables[0].Rows[i]["Book_id"].ToString();
id.Attributes.Add("runat", "server");
//id.Click += new ImageClickEventHandler(id_Click);
//creating a label for displaying name of the book
bookname = new LinkButton();
bookname.CssClass = "name";
bookname.Text = ds.Tables[0].Rows[i]["Book_name"].ToString();
bookname.Attributes.Add("runat", "server");
//bookname.Click += new EventHandler(bookname_Click);
//creating a label for displaying cost of the book
money = new Label();
money.CssClass = "cost";
money.Text = "<br/> Rs " + ds.Tables[0].Rows[i]["Book_cost"].ToString();
money.Attributes.Add("runat", "server");
//creating a button to add the book to the wishlist
wishlist = new Button();
wishlist.Attributes.Add("runat", "server");
wishlist.CssClass = "wishlist";
wishlist.Text = "ADD TO WISHLIST";
Book.Controls.Add(myDiv);
myDiv.Controls.Add(image);
myDiv.Controls.Add(content);
content.Controls.Add(id);
content.Controls.Add(bookname);
content.Controls.Add(money);
content.Controls.Add(wishlist);
}
}
protected void Image_Click(object sender, ImageClickEventArgs e)
{
Panel3.Visible = true;
Panel2.Visible = false;
//ImageButton image = sender as ImageButton;
//Response.Redirect("genre_content.aspx");
ide = ((ImageButton)sender).ImageUrl;
for (i = 0; i < num; i++)
{
if (ide == ds.Tables[0].Rows[i]["Book_image"].ToString())
{
Session["name"] = ds.Tables[0].Rows[i]["Book_name"].ToString();
Session["image"] = ds.Tables[0].Rows[i]["Book_image"].ToString();
Session["cost"] = ds.Tables[0].Rows[i]["Book_cost"].ToString();
Session["isbn"] = ds.Tables[0].Rows[i]["Book_isbn_no"].ToString();
Session["weight"] = ds.Tables[0].Rows[i]["Book_weight"].ToString();
Session["author"] = ds.Tables[0].Rows[i]["Book_author"].ToString();
Session["about"] = ds.Tables[0].Rows[i]["Book_about"].ToString();
Session["publisher"] = ds.Tables[0].Rows[i]["Book_publisher"].ToString();
Session["nop"] = ds.Tables[0].Rows[i]["No_of_pages"].ToString();
Session["language"] = ds.Tables[0].Rows[i]["Book_language"].ToString();
Session["available"] = ds.Tables[0].Rows[i]["Available_for"].ToString();
}
}
Image1.ImageUrl = Session["image"].ToString();
Name.Text = Session["name"].ToString();
about.Text = Session["about"].ToString();
cost.Text = Session["cost"].ToString();
author.Text = Session["author"].ToString();
isbn.Text = Session["isbn"].ToString();
publisher.Text = Session["publisher"].ToString();
nop.Text = Session["nop"].ToString();
language.Text = Session["language"].ToString();
weight.Text = Session["weight"].ToString();
available.Text = Session["available"].ToString();
}
}
}
答案 0 :(得分：0)
您的问题是您将按钮动态添加到表单中。如果回发随后返回，则您的页面不知道该按钮，因为它是在您的 page_load 中创建的。
您应该考虑使用 gridview 或模拟控件来保存列表。