我想使用拖放操作在两个网格视图之间移动一些数据。当用户将数据行拖动到另一个gridview时，一些数据将保存在Azure的数据库中。出于某种原因，当我移动数据行时没有什么事情真的发生，除了它可以移动但不能保存。我在Azure right here发布了我的应用程序！您还可以在那里看到数据库的打印。
两个问题：
1）为什么我的解决方案不起作用？ javascript代码有什么问题吗？ 2）为什么有一个错误使你能够将两行移动到另一个网格？
dragandDrop.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="dragandDrop.aspx.cs" Inherits="WebApplication2.dragandDrop" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Drag and drop haha</title>
<script src="http://ajax.aspnetcdn.com/ajax/jquery/jquery-1.8.0.js" type="text/javascript"></script>
<script src="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.8.22/jquery-ui.js"></script>
<link rel="Stylesheet" href="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.8.10/themes/redmond/jquery-ui.css" />
<script type="text/javascript">
$(function () {
$(".drag_drop_grid").sortable({
items: 'tr:not(tr:first-child)',
cursor: 'crosshair',
connectWith: '.drag_drop_grid',
axis: 'y',
dropOnEmpty: true,
receive: function (e, ui) {
$(this).find("tbody").append(ui.item);
var product = {};
product.Item = $("[id*=gvDest] tr:last").find("td:nth-child(1)").html();
product.Price = $("[id*=gvDest] tr:last").find("td:nth-child(2)").html();
$.ajax({
type: "POST",
url: "Default.aspx/SaveProduct",
data: '{product: ' + JSON.stringify(product) + '}',
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (response) {
alert("Product has been added successfully.");
}
});
return false;
}
});
$("[id*=gvDest] tr:not(tr:first-child)").remove();
});
</script>
<style type="text/css">
.GridSrc td
{
background-color: #A1DCF2;
color: black;
font-size: 10pt;
font-family: Arial;
line-height: 200%;
cursor: pointer;
width: 100px;
}
.GridSrc th
{
background-color: #3AC0F2;
color: White;
font-family: Arial;
font-size: 10pt;
line-height: 200%;
width: 100px;
}
.GridDest td
{
background-color: #eee !important;
color: black;
font-family: Arial;
font-size: 10pt;
line-height: 200%;
cursor: pointer;
width: 100px;
}
.GridDest th
{
background-color: #6C6C6C !important;
color: White;
font-family: Arial;
font-size: 10pt;
line-height: 200%;
width: 100px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<asp:Label ID="Label2" runat="server" Text="Products"></asp:Label>
<asp:GridView ID="gvSource" runat="server" CssClass="drag_drop_grid GridSrc" AutoGenerateColumns="false">
<Columns>
<asp:BoundField DataField="Item" HeaderText="Item" />
<asp:BoundField DataField="Price" HeaderText="Price" />
</Columns>
</asp:GridView>
<hr /><br />
<asp:Label ID="Label1" runat="server" Text="Shopping Cart"></asp:Label>
<asp:GridView ID="gvDest" runat="server" CssClass="drag_drop_grid GridDest" AutoGenerateColumns="false">
<Columns>
<asp:BoundField DataField="Item" HeaderText="Item" />
<asp:BoundField DataField="Price" HeaderText="Price" />
</Columns>
</asp:GridView>
</form>
</body>
</html>
又是另一部分，dragandDrop.aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Web.Script.Services;
using System.Web.Services;
using System.Web.Configuration;
namespace WebApplication2
{
public partial class dragandDrop : System.Web.UI.Page
{
List<String> list = new List<String>();
public class Product
{
public string Item { get; set; }
public int Price { get; set; }
}
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
SqlConnection conn = new SqlConnection();
conn.ConnectionString = WebConfigurationManager.ConnectionStrings["UsersConnectionString"].ConnectionString;
DataTable dt = new DataTable();
dt.Columns.AddRange(new DataColumn[2] { new DataColumn("Item"), new DataColumn("Price") });
try
{
conn.Open();
}
catch (Exception ex)
{
Response.Write("FAIL " + ex.Message);
return;
}
SqlCommand cmd = new SqlCommand();
cmd.Connection = conn;
cmd.CommandText = "SELECT * FROM myProducts";
SqlDataReader rdr = cmd.ExecuteReader();
while (rdr.Read())
{
list.Add((String)rdr["Item"]);
}
conn.Close();
foreach (String item in list) // Add to the dataTable.
{
dt.Rows.Add(item, 150);
}
gvSource.UseAccessibleHeader = true;
gvSource.DataSource = dt;
gvSource.DataBind();
dt.Rows.Clear();
dt.Rows.Add();
gvDest.DataSource = dt;
gvDest.DataBind();
}
}
[WebMethod]
[ScriptMethod]
public static void SaveProduct(Product product)
{
string constr = ConfigurationManager.ConnectionStrings["UsersConnectionString"].ConnectionString;
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand("UPDATE myProducts SET TableNbr=2 WHERE Item=@Item"))
{
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("@Item",product.Item);
cmd.Connection = con;
con.Open();
cmd.ExecuteNonQuery();
con.Close();
}
}
}
}
}
答案 0 :(得分：1)
刚想通了。我在GridView周围使用了UpdatePanel。 .Cs类是一样的。
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="dragandDrop.aspx.cs" Inherits="WebApplication2.dragandDrop" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Drag and drop haha</title>
<script src="http://ajax.aspnetcdn.com/ajax/jquery/jquery-1.8.0.js" type="text/javascript"></script>
<script src="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.8.22/jquery-ui.js"></script>
<link rel="Stylesheet" href="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.8.10/themes/redmond/jquery-ui.css" />
<script type="text/javascript">
$(function () {
$(".drag_drop_grid").sortable({
items: 'tr:not(tr:first-child)',
cursor: 'crosshair',
connectWith: '.drag_drop_grid',
axis: 'y',
dropOnEmpty: true,
receive: function (e, ui) {
$(this).find("tbody").append(ui.item);
var product = {};
product.Item = $("[id*=gvDest] tr:last").find("td:nth-child(1)").html();
product.Price = $("[id*=gvDest] tr:last").find("td:nth-child(2)").html();
$.ajax({
type: "POST",
url: "dragandDrop.aspx/SaveProduct",
data: '{product: ' + JSON.stringify(product) + '}',
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (response) {
alert("Product has been added successfully.");
}
});
return false;
}
});
$("[id*=gvDest] tr:not(tr:first-child)").remove();
});
</script>
<style type="text/css">
.GridSrc td
{
background-color: #A1DCF2;
color: black;
font-size: 10pt;
font-family: Arial;
line-height: 200%;
cursor: pointer;
width: 100px;
}
.GridSrc th
{
background-color: #3AC0F2;
color: White;
font-family: Arial;
font-size: 10pt;
line-height: 200%;
width: 100px;
}
.GridDest td
{
background-color: #eee !important;
color: black;
font-family: Arial;
font-size: 10pt;
line-height: 200%;
cursor: pointer;
width: 100px;
}
.GridDest th
{
background-color: #6C6C6C !important;
color: White;
font-family: Arial;
font-size: 10pt;
line-height: 200%;
width: 100px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<asp:Label ID="Label2" runat="server" Text="Products"></asp:Label>
<asp:GridView ID="gvSource" runat="server" CssClass="drag_drop_grid GridSrc" AutoGenerateColumns="false">
<Columns>
<asp:BoundField DataField="Item" HeaderText="Item" />
<asp:BoundField DataField="Price" HeaderText="Price" />
</Columns>
</asp:GridView>
<hr /><br />
<asp:Label ID="Label1" runat="server" Text="Shopping Cart"></asp:Label>
<hr />
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:GridView ID="gvDest" runat="server" CssClass="drag_drop_grid GridDest" AutoGenerateColumns="false">
<Columns>
<asp:BoundField DataField="Item" HeaderText="Item" />
<asp:BoundField DataField="Price" HeaderText="Price" />
</Columns>
</asp:GridView>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
<asp:Label ID="Label3" runat="server" Text="Label"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
<br /><hr />
<asp:Image ID="Image1" runat="server" ImageUrl="~/Images/Database_windows_azure_products.png" Width="500" Height="300" />
</form>
</body>
</html>