jquery如何查看页面中是否存在某个字符串 jquery怎么实现查询功能

利用JQuery方便实现基于Ajax的数据查询、排序和html" class="superseo">分页功能之前很少会用JavaScript去实现页功能主要怕麻烦，但了解JQuery后这种想法发生了变化；有了这样的脚本组件就可以在编写脚本时方便和HTML隔离出来，这样编写高重用性的脚本就更方便。下面就是介绍在学习JQuery过程中编写的基于Ajax的数据查询、排序和分页功能的复用脚本，只要遵循脚本的某些规则描述HTML把脚本文件引入就可以方便实现以上描述的功能。

       先看下实现功能的脚代码：

/**应用脚本规则：

          引用脚本: JQuery脚本和JQuery的form插件脚本

          Form的ID:    viewform

    显示数据的div的ID: listview

     分页按钮HTML属性: pageindex="1"

     排序按钮HTML属性: orderfield="employeeid desc";

提效排序字段Input的ID,Name: orderfield

提交分页索引Input的ID,Name: pageindex

**/
function onInitPaging()
{
     $("#listview").find("[@orderfield]").each(function(i)
        {
            var ordervalue = $(this).attr("orderfield");
            $(this).click(function()
                {
                    $("#orderfield").val(ordervalue);
                    onSubmitPage();
                }
            );
        }
    );
    $("#listview").find("[@pageindex]").each(function(i)
        {
            var piValue = $(this).attr("pageindex");
            $(this).click(function()
                {
                    $("#pageindex").val(piValue);
                    onSubmitPage();
                }
            );
        }
    );
}
function onSubmitPage()
{
    var
        success: function
            $("#listview").html(data);
            onInitPaging();
           
        }
    };
    $('#viewform').ajaxSubmit(options);
}
$(document).ready(
    function()
    {
        $("#search").click(function(){
        $("#pageindex").val('0');
        onSubmitPage()
        
        });
      onSubmitPage();
    }
);
约束规则巧用了html的自定义属性，以上代码描述查询，排序和分页的ajax提交处理。在编写HTML时只需要遵循描述的规则即可，你并不需要在编写任何脚本代码；只需要把脚本添加到页面里：
    <script src=jquery-latest.js></script>
    <script src=form.js></script>
    <script src=calendar.js></script>
     <script src=calendar-setup.js></script>
    <script src="lang/calendar-en.js"></script>
    <script src=pagination.js></script>
    <form id="viewform"  method="post" action="FrmOrderView.aspx">
    <input id="orderfield" name="orderfield" type="hidden" value="" />
    <input id="pageindex" name="pageindex" type="hidden" value ="0"/>
    <table border="0" cellpadding="0" cellspacing="0" style="width: 100%; height: 100%">
            <tr>
                <td valign="top" align="left">
                     <table width="550" cellpadding="0" cellspacing="0">
                        <tr>
                            <td style="width: 63px; height: 17px; background-color: gainsboro;">
                                CompanyName</td>
                            <td style="width: 114px; height: 17px;">
                                <input id="Text1" name="companyname" type="text" /></td>
                            <td style="width: 63px; height: 17px; background-color: gainsboro;">
                                ShipCity</td>
                            <td style="width: 126px; height: 17px;">
                                <input id="Text2" name="shipcity" type="text" /></td>
                        </tr>
                        <tr>
                            <td style="width: 63px; height: 14px; background-color: gainsboro;">
                                OrderDate</td>
                            <td style="width: 240px; height: 14px;" align="left">
                                <input id="Text3" name="OrderDate_Begin" type="text" />
                                <input id="button1" DateField="Text3" type="button" value="..." /></td>
                            <td style="width: 63px; height: 14px; background-color: gainsboro;">
                            </td>
                            <td style="width: 240px; height: 14px;" align="left">
                                <input id="Text4" type="text" name="OrderDate_End" />
                                <input id="button2" DateField="Text4" type="button" value="..." /></td>
                        </tr>
                        <tr>
                            <td style="height: 50px" align="left" colspan="4">
                                <input id="search" type="button" value="Search" /></td>
                        </tr>
                    </table>
                </td>
            </tr>
            <tr>
                <td height="99%">
                <div id="listview"></div>
                </td>
            </tr>
        </table>
     </form>
数据提供页面:
<%@Page Language="C#" AutoEventWireup="true" Inherits="HFSoft.MVC.DataViewContext" %>
<%@Import Namespace="NorthWind.Entities" %>
<%
    HFSoft.MVC.IDataViewContext dataview = (HFSoft.MVC.IDataViewContext)this;
 %>
<tablewidth="100%" >
   <% if(dataview.PageCount >0){%>
    <tr>
        <td colspan="7" style="height: 20px">
        <a href="#" pageindex="0" >首页</a>
        <a href="#" pageindex="<% =dataview.PrevPage%>">上一页</a>
        <a href="#" pageindex="<% =dataview.NextPage %>" >下一页</a>
        <a href="#" pageindex="<% =dataview.PageCount-1%>">末页</a>
        当前<%=dataview.PageIndex+1%>页／共<%=dataview.PageCount %>页
        </td>
    </tr>

 
    <%}%>
    <tr>
        <td style="width: 100px; font-weight: bold; background-color: activeborder;">
            <a href="#" orderfield="<%=dataview.GetOrderInfo("CompanyName")%>" >CustomerName</a></td>
        <td style="width: 100px; font-weight: bold; background-color: activeborder;">
            <a href="#" orderfield="<%=dataview.GetOrderInfo("Employees.EmployeeID")%>" >EmployeeName</a></td>
        <td style="width: 100px; font-weight: bold; background-color: activeborder;">
            <a href="#" orderfield="<%=dataview.GetOrderInfo("OrderDate")%>" >OrderDate</a></td>
        <td style="width: 100px; font-weight: bold; background-color: activeborder;">
            <a href="#" orderfield="<%=dataview.GetOrderInfo("RequiredDate")%>" >RequireDate</a></td>
        <td style="width: 100px; font-weight: bold; background-color: activeborder;">
            ShipAddress</td>
        <td style="width: 100px; font-weight: bold; background-color: activeborder;">
            ShipCity</td>
        <td style="width: 100px; font-weight: bold; background-color: activeborder;">
            SipCountry</td>
    </tr>
    <%foreach(Order_v item in dataview.DataItems)
      { %>
    <tr>
        <td style="width: 100px"><%=dataview.ToValue(item.CustomerName)%>
        </td>
        <td style="width: 100px"><%=dataview.ToValue(item.EmployeeName)%>
        </td>
        <td style="width: 100px"><%=dataview.ToValue(item.OrderDate, "{0:d}")%>
        </td>
        <td style="width: 100px"><%=dataview.ToValue(item.RequiredDate, "{0:d}")%>
        </td>
        <td style="width: 100px"><%=dataview.ToValue(item.ShipAddress)%>
        </td>
        <td style="width: 100px"><%=dataview.ToValue(item.ShipCity)%>
        </td>
        <td style="width: 100px"><% =dataview.ToValue(item.ShipCountry)%>
        </td>
    </tr>
    
     <% } %>
   
</table>
数据提供页相关Controller代码:
[HFSoft.MVC.FormMapper("~/frmorderview.aspx")]
publicvoid
{
    HFSoft.MVC.IDataViewContext viewcontext = (HFSoft.MVC.IDataViewContext)this.FormContext;
    IExpression
    FieldAdapter[] orderby = null;
    OrderSearch search = viewcontext.BindObject<OrderSearch>();
    exp = search.GetExpression();
    if (viewcontext.OrderField != null && viewcontext.OrderField != string.Empty)
    {
        orderby = new FieldAdapter[]{new FieldAdapter(viewcontext.OrderField, null)};
    }
    Region region = new Region(viewcontext.PageIndex * 10, viewcontext.PageIndex * 10+10);
    viewcontext.DataItems = exp.List<Order_v>(region, orderby);
    viewcontext.PageSize = 10;
    viewcontext.RecordCount = exp.CountOf<Order_v>();
}

例程效果图

 

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