我正在使用 Jquery 自动完成文本框，因为我正在输入一个以 z 开头的名称或数据库中不可用的名称，当时我需要在自动完成中显示一条自定义消息，提及“未找到数据”
我想出了一个解决方案，如果下面提到的解决方案不正确或任何其他替代方法来实现它，请纠正我。
提前致谢。
自动完成文本框.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="AutoCompleteTextBox.aspx.cs" Inherits="Ajax_Using_Jquery.AutoCompleteTextBox" %>
<!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>Ajax Auto Complete Using Jquery</title>
<script type="text/javascript" src="JQuery/jquery-1.9.0.mini.js"></script>
<script type="text/javascript" src="JQuery/jquery-ui.min.js" ></script>
<%--<link type="text/css" href="StyleSheet/jquery-ui.css" rel="Stylesheet" />--%>
<link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.1/themes/base/jquery-ui.css" rel="stylesheet" type="text/css"/>
<%--<link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.1/themes/base/jquery-ui.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.1/jquery-ui.min.js"></script> --%>
<script type="text/javascript">
$(document).ready(function () {
$(".autosuggest").autocomplete({
source: function (request, response) {
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "AutoCompleteFetchService.asmx/getUserNames",
data: "{'TextBoxVal':'" + document.getElementById('txtName1').value + "'}",
dataType: "json",
success: function (data) {
response(data.d);
if (data.d == "" || data.d == null || typeof (data.d) == 'undefined') {
response(["no search found"]);
}
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
alert("error " + XMLHttpRequest);
alert("error " + textStatus);
alert("error " + errorThrown);
}
});
}
});
});
</script>
<%-- <link href="StyleSheet/jquery-ui.css" type="text/css" rel="Stylesheet" />--%>
</head>
<body>
<form id="form1" runat="server">
<table>
<tr>
<td>
<div>
User Name :
<input type="text" id="txtName1" class="autosuggest" />
</div>
</td>
</tr>
</table>
</form>
</body>
</html>
AutoCompleteFetchService.asmx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Data.SqlClient;
using System.Configuration;
namespace Ajax_Using_Jquery
{
/// <summary>
/// Summary description for AutoCompleteFetchService
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
[System.Web.Script.Services.ScriptService()]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
// [System.Web.Script.Services.ScriptService]
public class AutoCompleteFetchService : System.Web.Services.WebService
{
[WebMethod]
public List<string> getUserNames(string TextBoxVal)
{
string strCon;
List<string> objList = new List<string>();
strCon = ConfigurationManager.ConnectionStrings["EmpNameFetch"].ConnectionString;
SqlConnection con = new SqlConnection(strCon);
SqlCommand cmd = new SqlCommand(@"select EmpName from newTb2 where EmpName like '%" + TextBoxVal + "%'", con);
con.Open();
SqlDataReader objReader = cmd.ExecuteReader();
while (objReader.Read())
{
objList.Add(objReader["EmpName"].ToString());
}
con.Close();
return objList;
}
}
}