1.刚开始在第一部分显示数据的时候出现如下错误：
修改：
@Page 中的EnableEventValidation="false"
2.点击各个按钮没有反应。
修改:为page_load事件加判断是否回发。if (!Page.IsPostBack)
3.ItemPlaceholderID和<asp:PlaceHolder ID="Layout" runat="server"></asp:PlaceHolder>
3. ListViewInsertEventArgs e 中可以通过 var temp = e.Values;可以通过键值来得到value的值。
源代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="NX.Manage.WebForm1" EnableEventValidation="false" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:listview ID="ListView1" runat="server" ItemPlaceholderID="Layout"
onitemcommand="ListView1_ItemCommand"
oniteminserting="ListView1_ItemInserting"
onitemupdating="ListView1_ItemUpdating" DataKeyNames="Value"
onitemediting="ListView1_ItemEditing">
<LayoutTemplate>
<ul>
<asp:PlaceHolder ID="Layout" runat="server"></asp:PlaceHolder>
</ul>
</LayoutTemplate>
<ItemTemplate>
<li><%# Eval("Name") %> (#<%# Eval("Value") %>)</li><asp:Button runat="server" ID="Create" CommandName="Create" Text="New" />
<asp:Button runat="server" ID="Edit" CommandName="Edit" Text="Edit" />
</ItemTemplate>
<EmptyDataTemplate>
<asp:Button runat="server" ID="Create" CommandName="Create" Text="New" />
</EmptyDataTemplate>
<InsertItemTemplate>
<li>Name: <asp:TextBox runat="server" ID="NewName" Text=‘<%# Bind("Name") %>‘ /><br />
Value: <asp:TextBox runat="server" ID="NewValue" Text=‘<%# Bind("Value") %>‘ />
<asp:Button runat="server" ID="Insert" Text="Save" CommandName="Insert" /> </li><br />
</InsertItemTemplate>
<EditItemTemplate>
<li>Name: <asp:TextBox runat="server" ID="Name" Text=‘<%# Bind("Name") %>‘ />
Value: <asp:TextBox runat="server" ID="Value" Text=‘<%# Bind("Value") %>‘ /> <br />
<asp:Button runat="server" ID="Update" Text="Save" CommandName="Update" />
</li>
</EditItemTemplate>
</asp:listview>
</div>
</form>
</body>
</html>
后台代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace NX.Manage
{
public partial class WebForm1 : System.Web.UI.Page
{
static readonly string SESSION_KEY = "_sk_dataentry_";
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
ListView1.DataSource = Data;
ListView1.DataBind();
}
}
protected List<DataEntry> Data
{
get
{
List<DataEntry> data = Session[SESSION_KEY] as List<DataEntry>;
if (data == null)
{
data = new List<DataEntry>();
data.Add(new DataEntry { Name = "James", Value = 1 });
data.Add(new DataEntry { Name = "Ash", Value = 2 });
data.Add(new DataEntry { Name = "Lulu", Value = 3 });
ViewState[SESSION_KEY] = data;
}
return data;
}
set { Session[SESSION_KEY] = value; }
}
protected void ListView1_ItemCommand(object sender, ListViewCommandEventArgs e)
{
if (e.CommandName == "Create")
{
ListView1.InsertItemPosition = InsertItemPosition.LastItem;
BindData();
}
}
private void BindData()
{
ListView1.DataSource = Data;
ListView1.DataBind();
}
protected void ListView1_ItemInserting(object sender, ListViewInsertEventArgs e)
{
var temp = e.Values;
ListViewItem item = e.Item;
try
{
string name = (item.FindControl("NewName") as TextBox).Text;
int value = int.Parse((item.FindControl("NewValue") as TextBox).Text);
List<DataEntry> data = Data;
data.Add(new DataEntry { Name = name, Value = value });
Data = data;
ListView1.InsertItemPosition = InsertItemPosition.None;
BindData();
}
catch { }
}
protected void ListView1_ItemUpdating(object sender, ListViewUpdateEventArgs e)
{
var c= e.OldValues;
var f= e.NewValues;
int value = int.Parse(ListView1.DataKeys[e.ItemIndex].Value.ToString());
List<DataEntry> data = Data;
DataEntry entry = data.Single(d => d.Value == value);
entry.Name = (ListView1.Items[e.ItemIndex].FindControl("Name") as TextBox).Text;
entry.Value = int.Parse((ListView1.Items[e.ItemIndex].FindControl("Value") as TextBox).Text);
Data = data;
ListView1.EditIndex = -1;
BindData();
}
protected void ListView1_ItemEditing(object sender, ListViewEditEventArgs e)
{
ListView1.EditIndex = e.NewEditIndex;
BindData();
}
}
[Serializable]
public class DataEntry
{
public string Name { get; set; }
public int Value { get; set; }
}
}
时间： 2024-10-10 00:58:22