SPGridView 研究笔记 Part 3 - 分组

SPGridView提供数据分组显示功能, 但是只能将页面内数据分组. 只要设置 AllowGrouping(true), GroupField(某列名) 就能实现下面的效果.



如果需要给分组的列加链接加菜单的话, 就得再设置GroupMenu. GroupMenu需要一个SPMenuField对象, 而SPMenuField又需要一个MenuTemplate.

所以我们先加入一个MenuTemplate.

<cc1:MenuTemplate ID="mtCategory" runat="server">
<cc1:MenuItemTemplate ID="mitFilter" runat="server" Text="View Products" />
</cc1:MenuTemplate>

由于这个GroupMenu不在Columns里, 而SPMenuField又不能像MenuTemplate一样扔在SPGridView之外. 所以只好在代码里加了.

protected override void OnInit(EventArgs e)
{
base.OnInit(e);
this.SPGridView1.GroupMenu = new SPMenuField();
this.SPGridView1.GroupMenu.MenuTemplateId = this.mtCategory.ID;
this.SPGridView1.GroupMenu.HeaderText = "Category";
this.SPGridView1.GroupMenu.TextFields = "CategoryName";
}

现在来看看效果吧.






完整代码:

<%@ Page Language="C#" MasterPageFile="~masterurl/Default.Master" %>

<%@ Register Assembly="Microsoft.SharePoint, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" Namespace="Microsoft.SharePoint.WebControls" TagPrefix="cc1" %>

<script runat="server">   1:

2:     protected override void OnInit(EventArgs e)

3:     {

4:         base.OnInit(e);

5:         this.SPGridView1.GroupMenu = new SPMenuField();

6:         this.SPGridView1.GroupMenu.MenuTemplateId = this.mtCategory.ID;

7:         this.SPGridView1.GroupMenu.HeaderText = "Category";

8:         this.SPGridView1.GroupMenu.TextFields = "CategoryName";

9:     }

</script>

<asp:Content ID="Content3" ContentPlaceHolderID="PlaceHolderAdditionalPageHead" runat="server">
</asp:Content>
<asp:Content ID="Content1" ContentPlaceHolderID="PlaceHolderPageTitleInTitleArea" runat="server">
SPGridView Demo: Part 3 - Grouping
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="PlaceHolderMain" runat="server">
<!--SPGridView-->
<cc1:SPGridView ID="SPGridView1" runat="server" EnableViewState="false" AutoGenerateColumns="False" DataSourceID="ObjectDataSource1" AllowSorting="true" AllowGrouping="true" GroupField="CategoryName" AllowGroupCollapse="true">
<Columns>
<cc1:SPBoundField DataField="ProductId" HeaderText="Product ID" SortExpression="ProductId">
</cc1:SPBoundField>
<cc1:SPBoundField DataField="ProductName" HeaderText="Product Name" SortExpression="ProductName" />
<asp:BoundField DataField="UnitPrice" DataFormatString="${0:F2}" HeaderText="Unit Price" SortExpression="UnitPrice" />
<asp:TemplateField HeaderText="Orderable" SortExpression="Discontinued">
<itemtemplate>
<asp:Label id="lblDiscontinued" runat="server" text='<%# Convert.ToBoolean(Eval("Discontinued")) ? "Yes" : "No" %>'></asp:Label>
</itemtemplate>
</asp:TemplateField>
</Columns>
</cc1:SPGridView>
<!--SPGridView-->
<!--MenuTemplate-->
<cc1:MenuTemplate ID="mtCategory" runat="server"> <cc1:MenuItemTemplate ID="mitFilter" runat="server" Text="View Products" /> </cc1:MenuTemplate>
<!--MenuTemplate-->
<!--ObjectDataSource-->
<asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="GetProductList" TypeName="SPGridView_Demo.NorthwindData" SortParameterName="sortExpression"></asp:ObjectDataSource>
<!--ObjectDataSource-->
</asp:Content>

特别注意:
1.启用分组后, 如果不把EnableViewState设置为false, 排序功能就会出错. 寒~~
2.启用分组后, 过滤功能会失灵. 晕倒~~
3.如果使用了ObjectDataSource来分页数据, 那么分组只能分当前页的, 过滤功能也失灵. 汗~~