Ajax implements intelligent prompt search function-JS Tutorial-php.cn

Ajax implements intelligent prompt search function

亚连

Release： 2018-05-23 15:48:05

Original

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This article mainly introduces the intelligent prompt search function of Ajax in detail, which has certain reference value. Interested friends can refer to it

1. Rendering:

2. Implementation process:

Ideas:

3. Part of the code:
html:

 <p id="searchbox">
  <p><input type="text" id="txtTitle" /></p>
  <p id="btnSelect"><a href="javascript:;">Google</a></p>
 </p>
 <p id="dtitles"></p>

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css code:

* {
 padding:0px;
 margin:0px;
}

#searchbox {
 margin-top:10px;
 height:37px;
 width:550px;
}
#searchbox p {
 float:left;
} 
#txtTitle {
 height:35px;
 width:440px;
 line-height:35px;
 border:solid 1px #4791FF;
}
#btnSelect a{
 width:100px;
 height:37px;
 background:#167ED9;
 display:block;
 line-height:37px;
 color:#ffffff;
 text-align:center; 
}
a:link {
 text-decoration:none;
}
a:hover {
 cursor:pointer;
}
#dtitles {
 width:540px;
 height:90px;
 border:solid 1px #CCCCCC;
 display:none;
 font-size:12px;
}
.li1 {
 background:#F0F0F0;
}

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js code:

$(function ()
{
 //1.页面加载之后，找到文本框的内容对它触发一个事件
 $("#txtTitle").keyup(function ()
 {
  //2.获取到文本框的内容,注意去空格
  var title = $.trim($("#txtTitle").val());
  //3.获取到输入的内容之后，就要通过ajax传给后台
  $.post("/Handler3.ashx", { "title": title }, function (data)
  {
   if (title == "") {
    $("#dtitles").hide();
   }
   else
   {
    //显示展示p,把它清空
    $("#dtitles").show().html("");
    if (data == "") {
     $("#dtitles").text("没有相关数据!");
    }
    else {
     $("#dtitles").append(data);
     //4.鼠标移上去之后，加一个背景
     $("li").hover(function ()
     {
      $(this).addClass("li1");
     }, function ()
     {
      $(this).removeClass("li1");
     });
    }
   }
  });
 });
});

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ajax:

public void ProcessRequest(HttpContext context)
  {
   //1.提交过来之后，我们要接收
   string title=context.Request.Form["title"];
   //2.得到一个sql语句
   string strsql = string.Format("select top 5 title from RNews where Title like &#39;%{0}%&#39; ",title);
   //3.那得到sql怎么去做处理？
   DataTable dt = SqlHelper.ExecuteDataSetText(strsql,null).Tables[0];
   //4.我们最后要返回的是一个列表,要做字符串拼凑
   StringBuilder sb = new StringBuilder();
   //4.1判断得到的sql结果里面是否有数据
   if (dt.Rows.Count > 0)
   {
    //4.1.1
    sb.Append("<ul>");
    for (int i = 0; i < dt.Rows.Count; i++)
    {
     sb.Append(string.Format("<li>{0}</li>", dt.Rows[i][0].ToString()));
    }
    sb.Append("</ul>");
   }
   context.Response.Write(sb.ToString());
  }

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The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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