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AjaxControlToolkit是一组控件的集合,可以实现自动补充文本框,点击文本框弹出日历,加水印等Ajax效果等等,感兴趣的朋友可以了解下啊,或许本文对你学习ajax有所帮助
AjaxControlToolkit是一组控件的集合,可以实现自动补充文本框,点击文本框弹出日历,加水印等Ajax效果,包含40多个控件,具体实现效果如:http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite/Default.aspx 像百度搜索一样,根据用户输入自动联想相关词汇,借助AjaxControlToolkit中的AutoCompleteExtender控件很简单的实现,实现效果如下: 详细步骤: 一:Vs中安装AjaxControlToolkit AjaxControlToolkit安装到VS中(需要注意版本问题): 安装方法:http://www.asp.net/ajaxlibrary/act.ashx 相应版本提示:http://ajaxcontroltoolkit.codeplex.com/ 二:Web页面中调用AutoCompleteExtender(页面中要提前Register,第二行代码) 复制代码 代码如下: <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="HTML_editor.WebForm1" %> <%@ Register TagPrefix="asp" Namespace="AjaxControlToolkit" Assembly="AjaxControlToolkit" %> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> </head> <body> <form id="form1" runat="server"> <div> <asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="Server" /> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <asp:AutoCompleteExtender ID="AutoCompleteExtender1" runat="server" TargetControlID="TextBox1" CompletionSetCount="10" EnableCaching="true" MinimumPrefixLength="1" CompletionInterval="100" ServicePath="WebService.asmx" ServiceMethod="GetEnglishName"> </asp:AutoCompleteExtender> </div> </form> </body> </html> 三:添加Web服务 WebService.asmx 复制代码 代码如下: using System; using System.Collections.Generic; using System.Data.SqlClient; using System.Linq; using System.Web; using System.Web.Script.Services; using System.Web.Services; namespace HTML_editor { /// <summary> /// WebService 的摘要说明 /// </summary> [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [System.ComponentModel.ToolboxItem(false)] // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务,请取消注释以下行。 [System.Web.Script.Services.ScriptService] public class WebService : System.Web.Services.WebService { //从数据库中读取匹配信息 [WebMethod] [ScriptMethod] public string[] GetEnglishName(string prefixText, int count) { List<string> suggestions = new List<string>();//声明一泛型集合 SqlConnection con = new SqlConnection("server=.;database=Attendance;uid=sa;pwd=;"); con.Open(); SqlCommand com = new SqlCommand(" select [EnglishName] from [Employee] where [EnglishName] like '%t%' order by [EnglishName]", con); SqlDataReader sdr = com.ExecuteReader(); while (sdr.Read()) { suggestions.Add(sdr.GetString(0)); } sdr.Close(); con.Close(); return suggestions.ToArray(); } //直接用方法产生匹配信息 //[WebMethod] //public string[] GetCompleteList(string prefixText, int count) //{ // char c1, c2, c3; // if (count == 0) // count = 10; // List<String> list = new List<string>(count); // Random rnd = new Random(); // for (int i = 1; i <= count; i++) // { // c1 = (char)rnd.Next(65, 90); // c2 = (char)rnd.Next(97, 122); // c3 = (char)rnd.Next(97, 122); // list.Add(prefixText + c1 + c2 + c3); // } // return list.ToArray(); //} } } 四:完成,运行Web页面即可看到文本框的自动补充效果,需要注意的地方如下: AutoCompleteExtender控件参数说明: 1.TargetControlID:指定要实现提示功能的控件; 2.ServicePath:WebService的路径,提取数据的方法是写在一个WebService中的; 3.ServeiceMethod:写在WebService中的用于提取数据的方法的名字; 4.MinimumPrefixLength:用来设置用户输入多少字母才出现提示效果; 5.CompletionSetCount:设置提示数据的行数; 6.CompletionInterval:从服务器获取书的时间间隔,单位是毫秒。 WebService.asmx 需要注意的地方: 1.由于该WEB服务是为Ajax框架提供服务的,因此在类声明之前得加上属性声明: [System.Web.Script.Services.ScriptService] 2.特别需要注意的是GetTextString这个方法。凡是为AutoCompleteExtender控件提供服务的方法都必需完全满足以下三个条件: A.方法的返回类型必需为:string []; B.方法的传入参数类型必需为:string , int; C.两个传入参数名必需为:prefixText , count。 文本框输入的值传递到WebService中: aspx: 复制代码 代码如下: <%@ Page Language="C#" AutoEventWireup="true" CodeFile="TestSearch.aspx.cs" Inherits="TestSearch" %> <%@ Register TagPrefix="asp" Namespace="AjaxControlToolkit" Assembly="AjaxControlToolkit" %> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> <script type="text/javascript"> function OnTxtPersonInfoKeyDown() { var val = document.getElementById("<%=TextBox1.ClientID %>").value; var NameClientID = "<%=AutoCompleteExtender1.ClientID %>"; var acName = $find(NameClientID); if (acName != null) { acName.set_contextKey(val); } } function OnTxtPersonInfoKeyDown2() { var val = document.getElementById("<%=TextBox2.ClientID %>").value; var NameClientID = "<%=AutoCompleteExtender2.ClientID %>"; var acName = $find(NameClientID); if (acName != null) { acName.set_contextKey(val); } } </script> </head> <body> <form id="form1" runat="server"> <div> <asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="Server" /> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <asp:AutoCompleteExtender ID="AutoCompleteExtender1" runat="server" TargetControlID="TextBox1" CompletionSetCount="10" EnableCaching="false" FirstRowSelected="true" UseContextKey="True" MinimumPrefixLength="0" CompletionInterval="100" ServicePath="WebService.asmx" ServiceMethod="GetEnglishName"> </asp:AutoCompleteExtender> <br /> <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox> <asp:AutoCompleteExtender ID="AutoCompleteExtender2" runat="server" TargetControlID="TextBox2" CompletionSetCount="10" EnableCaching="false" FirstRowSelected="true" UseContextKey="True" MinimumPrefixLength="0" CompletionInterval="100" ServicePath="WebService.asmx" ServiceMethod="GetEnglishName"> </asp:AutoCompleteExtender> </div> </form> </body> </html> aspx.cs 复制代码 代码如下: using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class TestSearch : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { TextBox1.Attributes.Add("onkeydown", "return OnTxtPersonInfoKeyDown();"); TextBox2.Attributes.Add("onkeydown", "return OnTxtPersonInfoKeyDown2();"); } } webservice.asmx.cs 复制代码 代码如下: <%@ WebService Language="C#" Class="WebService" %> using System; using System.Web; using System.Web.Services; using System.Web.Services.Protocols; using System.Web.Script.Services; using System.Data; using System.Data.SqlClient; using System.Collections.Generic; [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务,请取消注释以下行。 [System.Web.Script.Services.ScriptService] public class WebService : System.Web.Services.WebService { //从数据库中读取匹配信息 [WebMethod] [ScriptMethod] public string[] GetEnglishName(string prefixText, int count, string contextKey) { SQLHelper sqlH = new SQLHelper(); //contextKey = "t"; string strSql = " select [EnglishName] from [Employee] where [LeftDate] is null and [EnglishName] like '" + contextKey + "%' order by [EnglishName] "; DataTable dt = sqlH.ExecuteQuery(strSql, CommandType.Text); List<string> suggestions = new List<string>();//声明一泛型集合 suggestions.Clear(); if (dt.Rows.Count > 0) { for (int i = 0; i < dt.Rows.Count; i++) { suggestions.Add(dt.Rows[i][0].ToString()); } } return suggestions.ToArray(); } }
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