• 使用Ajax和Jquery实现GridView的展开、合并


    需求简介:电子商务网站中,查询会员的订单,点击“會員”,展现此会员的订单列表。Demo

    界面操作:

    Step 1 展现会员列表,如下图

    Step 2 点击“某一会员”行 展现会员订单列表

     实现思路:

    1、  使用用户控件(CustomerOrders.ascx)展示订单列表,此用户控件只需要包含Repeater控件并绑定数据源

    2、  新建一个简单页面GridViewDrillDownjQueryQAjax.aspx,在此页面引用用户控件,展示用户订单列表

    3、  在页面GridViewDrillDownjQueryQAjax.aspx新建两个DIV:一个用来展示会员信息,一个用来展示某个会员的订单信息。当点击某一会员信息时,展示此会员的订单列表

    实现细节:

    1、  新建用户控件(CustomerOrders.ascx),拖数据源控件 和 Repeater控件到页面,主要代码如下

     在用户控件的后台代码中有一属性CustomerId,它主要用来传递参数


    <asp:SqlDataSource ID="sqlDsOrders" runat="server" ConnectionString="<%$ ConnectionStrings:Northwind %>"
        SelectCommand="SELECT [OrderID], [OrderDate], [RequiredDate], [Freight], [ShippedDate] FROM [Orders] WHERE ([CustomerID] = @CustomerID)">
        <SelectParameters>
            <asp:Parameter Name="CustomerID" Type="String" DefaultValue="" />
        </SelectParameters>
    </asp:SqlDataSource>
    <asp:Repeater ID="List" DataSourceID="sqlDsOrders" runat="server">
        <HeaderTemplate>
            <table class="grid" cellspacing="0" rules="all" border="1" style="border-collapse: collapse;">
                <tr>
                    <th scope="col">&nbsp;</th>
                    <th scope="col">Order ID</th>
                    <th scope="col">Date Ordered</th>
                    <th scope="col">Date Required</th>
                    <th scope="col" style="text-align: right;">Freight</th>
                    <th scope="col">Date Shipped</th>
                </tr>
        </HeaderTemplate>
        <ItemTemplate>
            <tr class='<%# (Container.ItemIndex%2==0) ? "row" : "altrow" %>'>
                <td class="rownum"><%# Container.ItemIndex+1 %></td>
                <td style=" 80px;"><%# Eval("OrderID") %></td>
                <td style=" 100px;"><%# Eval("OrderDate","{0:dd/MM/yyyy}") %></td>
                <td style=" 110px;"><%# Eval("RequiredDate", "{0:dd/MM/yyyy}")%></td>
                <td style=" 50px; text-align: right;"><%# Eval("Freight","{0:F2}") %></td>
                <td style=" 100px;"><%# Eval("ShippedDate", "{0:dd/MM/yyyy}")%></td>
            </tr>
        </ItemTemplate>
        <FooterTemplate>
            </table>
        </FooterTemplate>
    </asp:Repeater>

     2、 重写用户控件(CustomerOrders.ascx)的OnLoad处理事件,代码如下:


    protected override void OnLoad(EventArgs e)
        {
            this.sqlDsOrders.SelectParameters["CustomerID"].DefaultValue = this.CustomerId;
            base.OnLoad(e);
        }

     3、  新建一个简单页面GridViewDrillDownjQueryQAjax.aspx,在此页面引用用户控件(CustomerOrders.ascx),展示用户订单列表。下面的后台方法主要用来根据会员编号(CustomerId)获得会员的订单列表。


    [System.Web.Services.WebMethod()]
        public static string GetOrders(string customerId)
        {
            System.Threading.Thread.Sleep(500);
            Page page = new Page();
            CustomerOrders ctl = (CustomerOrders)page.LoadControl("~/CustomerOrders.ascx");
            ctl.CustomerId = customerId;
            page.Controls.Add(ctl);
            System.IO.StringWriter writer = new System.IO.StringWriter();
            HttpContext.Current.Server.Execute(page, writer, false);
            string output = writer.ToString();
            writer.Close();
            return output;
        }

    以上3步主要完成的是后台代码,那么接下来我们需要做的是: 使用Ajax读取数据并折叠展示。

    4、  在页面(GridViewDrillDownjQueryQAjax.aspx)新建两个Div 如下:

    第一个Div用来展示会员信息,第二个Div用来展示此会员下的订单列表。当用点击会员信息时(第一个Div),初始化Ajax请求并返回html代码到第二个Div,展示此会员的订单列表。


     <asp:GridView Width="100%" AllowPaging="True" ID="gvCustomers" AutoGenerateColumns="False"
                                                DataSourceID="sqlDsCustomers" runat="server" ShowHeader="False">
                                                <Columns>
                                                    <asp:TemplateField>
                                                        <ItemTemplate>
                                                            <div class="group" style="display:inline" id='<%#String.Format("customer{0}",Container.DataItemIndex) %>' 
                                                                onclick='showhide(<%#String.Format("\"#customer{0}\"",Container.DataItemIndex) %>,
                                                                                  <%#String.Format("\"#order{0}\"",Container.DataItemIndex) %>,
                                                                                  <%#String.Format("\"{0}\"",Eval("CustomerID")) %>)'>
                                                                <asp:Image ID="imgCollapsible" CssClass="first" ImageUrl="~/Assets/img/plus.png"
                                                                    Style="margin-right: 5px;" runat="server" /><span class="header">
                                                                        <%#Eval("CustomerID")%>:
                                                                        <%#Eval("CompanyName")%>(<%#Eval("TotalOrders")%> Orders) </span>
                                                            </div>                                                        
                                                            <div id='<%#String.Format("order{0}",Container.DataItemIndex) %>' class="order"></div>
                                                        </ItemTemplate>
                                                    </asp:TemplateField>
                                                </Columns>
                                            </asp:GridView>

    5、第一个Divi的客户端点击事件处理代码调用showhide(div1Id,div2Id,customerId)方法,主要代码如下:

      


    function showhide(master,detail,customerId)
                { 
                    //First child of master div is the image
                    var src = $(master).children()[0].src;
                    //Switch image from (+) to (-) or vice versa.
                    if(src.endsWith("plus.png"))
                        src = src.replace('plus.png','minus.png');
                    else
                        src = src.replace('minus.png','plus.png');
                    //if the detail DIV is empty Initiate AJAX Call, if not that means DIV already populated with data             
                    if($(detail).html() == "")
                    {
                        //Prepare Progress Image
                        var $offset = $(master).offset();
                        $('#progress').css('visibility','visible');
                        $('#progress').css('top',$offset.top);
                        $('#progress').css('left',$offset.left+$(master).width());                    
                        //Prepare Parameters
                        var params = '{customerId:"'+ customerId +'"}';                    
                        //Issue AJAX Call
                        $.ajax({
                                type: "POST", //POST
                                url: "GridViewDrillDownjQueryAjax.aspx/GetOrders", //Set call to Page Method
                                data: params, // Set Method Params
                                beforeSend: function(xhr) {
                                    xhr.setRequestHeader("Content-type", "application/json; charset=utf-8");},
                                contentType: "application/json; charset=utf-8", //Set Content-Type
                                dataType: "json", // Set return Data Type
                                success: function(msg, status) {
                                    $('#progress').css('visibility','hidden');
                                    $(master).children()[0].src = src;
                                    $(detail).html(msg);
                                    $(detail).slideToggle("normal"); // Succes Callback
                                    },
                                error: function(xhr,msg,e){
                                    alert(msg);//Error Callback
                                    }
                                });
                    }
                    else
                    {
                        //Toggle expand/collapse                   
                        $(detail).slideToggle("normal");
                        $(master).children()[0].src = src;
                    }
                }

    解释:

    type: 请求方式使用“post”

    url:   请求的URL

    data:  要传的参数

    beforeSend:请求发送之前所要做的操作

    contentType: 设置contentType为application/json; charset=utf-8

    datatype: 设置返回类型为 json

    success:请求成功返回正确的结果后 所要操作的事情,比如向第二个div追加订单列表html代码,然后滑动展示。

    Error: 请求失败,弹出失败信息

    至此,使用Ajax和Jquery实现GridView的展开和合并完毕。

    源代码下载:https://files.cnblogs.com/ywqu/GridViewDrillDownJQueryAjax.rar

    英文地址:http://mosesofegypt.net/post/GridView-Grouping-Master-Detail-Drill-Down-Using-jQuery-AJAX.aspx

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  • 原文地址:https://www.cnblogs.com/sheseido/p/1871710.html
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