我在这里寻求建议，最好的方法是什么。
这是场景。
我正在构建我的项目ASP.NET（C＃）
我需要根据与下拉相关的另外两个文本框添加动态下拉框。
例如：
我有一个名为“ADD LANDSCAPE”的按钮，每次触发时，我都需要创建一个动态下拉“ddlLandscap”和两个文本框，以便用户可以为每个文本框输入横向值。
你们能告诉我们最好的方法吗
答案 0 :(得分：1)
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="CS1.aspx.cs" Inherits="workout.CS1" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title></title>
<link href="../jquery/jquery-ui.css" rel="stylesheet" />
<script src="../jquery/jquery-1.12.0.js"></script>
<script src="../jquery/jquery-ui.js"></script>
<style type="text/css">
body {
font-family: Arial;
font-size: 10pt;
}
.table {
border: 1px solid #ccc;
border-collapse: collapse;
}
.table th {
background-color: #F7F7F7;
color: #333;
font-weight: bold;
}
.table th, .table td {
padding: 5px;
border: 1px solid #ccc;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<asp:GridView ID="gvCustomers1" CssClass="table" runat="server" AutoGenerateColumns="false">
<Columns>
<asp:TemplateField HeaderText="Slno" ItemStyle-Width="50px" ItemStyle-CssClass="Slno">
<ItemTemplate>
<%# Eval("Slno") %>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Name" ItemStyle-Width="150px" ItemStyle-CssClass="Name">
<ItemTemplate>
<%# Eval("Name") %>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Country" ItemStyle-Width="150px" ItemStyle-CssClass="Country">
<ItemTemplate>
<%# Eval("Country")%>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Option">
<ItemTemplate>
<asp:Button ID="lnkDelete" runat="server" Text="Delete" OnClientClick="Confirmationbox(this);" />
<asp:Button ID="btn_update" runat="server" Text="Update" OnClientClick="updateable(this);" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<br />
<asp:Button ID="btnNewUser" runat="server" Text="Add" OnClientClick="return false;" />
<asp:Button ID="Button1" Text="Submit" runat="server" OnClick="Submit" OnClientClick="formatData()" />
<br />
<div id="dialog-form" title="Create new user">
<p class="validateTips">All form fields are required.</p>
<table border="0" cellpadding="0" cellspacing="0">
<tr>
<td style="width: 150px">Name:<br />
<asp:TextBox ID="txtName" runat="server" Width="140" Text="" />
</td>
<td style="width: 150px">Country:<br />
<asp:TextBox ID="txtCountry" runat="server" Width="140" Text="" />
</td>
</tr>
</table>
</div>
<div id="dialog-form-edit" title="Edit user">
<p class="validateTips">All form fields are required.</p>
<asp:HiddenField ID="hdslno" runat="server" Value="" />
<table border="0" cellpadding="0" cellspacing="0">
<tr>
<td style="width: 150px">Name:<br />
<asp:TextBox ID="TextBox1" runat="server" Width="140" Text="" />
</td>
<td style="width: 150px">Country:<br />
<asp:TextBox ID="TextBox2" runat="server" Width="140" Text="" />
</td>
</tr>
</table>
</div>
<br />
<script type="text/javascript">
var dialog,editDialog;
function formatData() {
var formatdata = "";
$( '#gvCustomers1 tr:gt(0)' ).each( function () {
$( this ).find( 'td' ).each( function () {
if ( $( this ).hasClass( "Slno" ) || $( this ).hasClass( "Name" ) || $( this ).hasClass( "Country" ) ) {
formatdata += $( this ).html() + "|";
}
} );
formatdata += ",";
} );
alert( formatdata );
return false;
}
$(function () {
dialog = $("#dialog-form").dialog({
autoOpen: false,
height: 300,
width: 350,
modal: true,
buttons: {
"Create an account": AddRow,
Cancel: function () {
dialog.dialog("close");
}
},
close: function () {
$("#txtName").val("");
},
open: function () {
var nr = $('#dialog-form').data('param');
if (nr) {
$("#txtName").val(nr);
} else {
$("#txtName").val("");
}
}
});
editDialog = $("#dialog-form-edit").dialog({
autoOpen: false,
height: 300,
width: 350,
modal: true,
buttons: {
"Create an account": UpdateRow,
Cancel: function () {
editDialog.dialog("close");
}
},
close: function () {
$("#txtName").val("");
},
open: function () {
var nr = $('#dialog-form-edit').data('param');
console.log(nr);
$( "#hdslno" ).val( nr.slno );
$("#TextBox1").val(nr.name);
$("#TextBox2").val(nr.country);
}
});
});
$("#btnNewUser").button().on("click", function () {
dialog.dialog("open");
});
function Confirmationbox(obj) {
if (confirm("Do you want to delete this Customer?")) {
var row = $(obj).closest("tr");
row.remove();
}
return true;
}
function updateable(obj) {
var row = $(obj).closest("tr");
var slno = $(row).find("td").eq(0).html();
var name = $(row).find("td").eq(1).html();
var country = $(row).find("td").eq(2).html();
try {
var json = {
slno: slno,
name: name,
country: country
};
editDialog.data('param', json).dialog("open");
event.preventDefault();
} catch (e) {
alert(e);
}
return false;
}
function UpdateRow() {
var slno = $( "#hdslno" ).val();
var m_Name = $( "#TextBox1" ).val();
var m_Country = $( "#TextBox2" ).val();
var row = null;
$( '#gvCustomers1 tr:gt(0)' ).each( function () {
$( this ).find( 'td' ).each( function () {
if ( $( this ).hasClass( "Slno" ) && $( this ).html() == slno ) {
row = $( this ).closest( "tr" );
}
} )
} );
if ( row ) {
$( row ).find( "td" ).eq( 1 ).html( m_Name );
$( row ).find( "td" ).eq( 2 ).html( m_Country );
}
editDialog.dialog( "close" );
return false;
}
function AddRow() {
//Reference the GridView.
var gridView = document.getElementById("<%=gvCustomers1.ClientID %>");
//Reference the TBODY tag.
var tbody = gridView.getElementsByTagName("tbody")[0];
//Reference the first row.
var row = tbody.getElementsByTagName("tr")[1];
//Check if row is dummy, if yes then remove.
if (row.getElementsByTagName("td")[0].innerHTML.replace(/\s/g, '') == "") {
tbody.removeChild(row);
}
//Clone the reference first row.
row = row.cloneNode(true);
var legnth = gridView.rows.length;
SetValue1(row, 0, "Slno", legnth);
//Add the Name value to first cell.
var txtName = document.getElementById("<%=txtName.ClientID %>");
SetValue(row, 1, "name", txtName);
//Add the Country value to second cell.
var txtCountry = document.getElementById("<%=txtCountry.ClientID %>");
SetValue(row, 2, "country", txtCountry);
//Add the row to the GridView.
tbody.appendChild(row);
dialog.dialog("close");
return false;
}
function SetValue(row, index, name, textbox) {
row.cells[index].innerHTML = textbox.value;
textbox.value = "";
}
function SetValue1(row, index, name,leng) {
row.cells[index].innerHTML = leng;
}
</script>
<asp:HiddenField ID="hdTableValues" runat="server" Value="" />
</form>
</body>
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;
namespace workout
{
public partial class CS1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
this.BindGrid();
}
}
private void BindGrid()
{
DataTable dt = new DataTable();
string query = "SELECT '' Slno, Name, Country FROM dd_Detils";
string constr = "Data Source=localhost;Initial Catalog=DataBase;User ID=sa;Password=globalfocus";
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand(query))
{
cmd.Connection = con;
using (SqlDataAdapter sda = new SqlDataAdapter(cmd))
{
sda.SelectCommand = cmd;
sda.Fill(dt);
}
}
}
if (dt.Rows.Count == 0)
{
//If no records then add a dummy row.
dt.Rows.Add();
}
gvCustomers1.DataSource = dt;
gvCustomers1.DataBind();
}
protected void Submit(object sender, EventArgs e)
{
int cnt = gvCustomers1.Rows.Count;
if (!string.IsNullOrEmpty(Request.Form["name"]) && !string.IsNullOrEmpty(Request.Form["country"]))
{
//Fetch the Hidden Field values from the Request.Form collection.
string[] names = Request.Form["name"].Split(',');
string[] countries = Request.Form["country"].Split(',');
//Loop through the values and insert into database table.
for (int i = 0; i < names.Length; i++)
{
string constr = "Data Source=localhost;Initial Catalog=Database;User ID=sa;Password=globalfocus";
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand("INSERT INTO dd_Detils VALUES(@Name, @Country)"))
{
cmd.Parameters.AddWithValue("@Name", names[i]);
cmd.Parameters.AddWithValue("@Country", countries[i]);
cmd.Connection = con;
con.Open();
cmd.ExecuteNonQuery();
con.Close();
}
}
}
//Refresh the page to load GridView with records from database table.
Response.Redirect(Request.Url.AbsoluteUri);
}
}
}
}