8.行命令按钮
- ListView的行按钮和Repeater一样，不同的是取当前行数据的方式，int index=((ListViewDataItem)e.Item).DisplayIndex取出操作行的行号，ListView1.DataKeys[index].Value取出主键的值，如果对数据进行了操作，最后要对ListView执行DataBind刷新数据，由ListView的DataKeynames属性决定存储哪些字段值为主键，可以多个主键（和数据库主键没有直接关系），所有有Values.
- 排序：将LayoutTemplate中的表头用<asp:LinkButton runat="server" CommandName="Sort" Text="Id" CommandArgument="Id" />代替，其中CommandArgument的值为排序字段。只要是CommandName、CommandArgument对就可以了，展现成什么，显示在哪都可以。
实例：
有个数据表有三个字段：id（自增）,name(用户名).age(年龄).用listview显示这些数据，并在listview中放一个按钮，每当点击一下这个按钮，这个记录的年龄就会增加一岁。因为我们可以在浏览状态下给其增加一岁，所有把这个行按钮放在itemTemplate中。也放入一按钮用于排序，如下源码：
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="行命令设置.WebForm1" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" DeleteMethod="Delete" InsertMethod="Insert" OldValuesParameterFormatString="original_{0}" SelectMethod="GetData" TypeName="行命令设置.DAL.DataSetUserTableAdapters.T_UserTableAdapter" UpdateMethod="Update"> <DeleteParameters> <asp:Parameter Name="Original_id" Type="Int32" /> </DeleteParameters> <InsertParameters> <asp:Parameter Name="name" Type="String" /> <asp:Parameter Name="age" Type="Int32" /> </InsertParameters> <UpdateParameters> <asp:Parameter Name="name" Type="String" /> <asp:Parameter Name="age" Type="Int32" /> <asp:Parameter Name="Original_id" Type="Int32" /> </UpdateParameters> </asp:ObjectDataSource> <asp:DataPager ID="DataPager1" runat="server" PagedControlID="ListView1"> <Fields> <asp:NextPreviousPagerField ButtonType="Button" ShowFirstPageButton="True" ShowNextPageButton="False" ShowPreviousPageButton="False" /> <asp:NumericPagerField /> <asp:NextPreviousPagerField ButtonType="Button" ShowLastPageButton="True" ShowNextPageButton="False" ShowPreviousPageButton="False" /> </Fields> </asp:DataPager> <asp:ListView ID="ListView1" runat="server" DataKeyNames="id" DataSourceID="ObjectDataSource1" InsertItemPosition="None" onitemcommand="ListView1_ItemCommand"> <EditItemTemplate> <tr style=""> <td> <asp:Button ID="UpdateButton" runat="server" CommandName="Update" Text="更新" /> <asp:Button ID="CancelButton" runat="server" CommandName="Cancel" Text="取消" /> </td> <td> <asp:Label ID="idLabel1" runat="server" Text='<%# Eval("id") %>' /> </td> <td> <asp:TextBox ID="nameTextBox" runat="server" Text='<%# Bind("name") %>' /> </td> <td> <asp:TextBox ID="ageTextBox" runat="server" Text='<%# Bind("age") %>' /> </td> </tr> </EditItemTemplate> <EmptyDataTemplate> <table runat="server" style=""> <tr> <td> 未返回数据。</td> </tr> </table> </EmptyDataTemplate> <InsertItemTemplate> <tr style=""> <td> <asp:Button ID="InsertButton" runat="server" CommandName="Insert" Text="插入" /> <asp:Button ID="CancelButton" runat="server" CommandName="Cancel" Text="清除" /> </td> <td> </td> <td> <asp:TextBox ID="nameTextBox" runat="server" Text='<%# Bind("name") %>' /> </td> <td> <asp:TextBox ID="ageTextBox" runat="server" Text='<%# Bind("age") %>' /> </td> </tr> </InsertItemTemplate> <ItemTemplate> <tr style=""> <td> <asp:Button ID="btn" runat="server" Text="排序" CommandName="Sort" CommandArgument="Age" /> <asp:Button ID="IncBtn" runat="server" Text="增一岁" CommandName="IncAge" /> <asp:Button ID="DeleteButton" runat="server" CommandName="Delete" Text="删除" /> <asp:Button ID="EditButton" runat="server" CommandName="Edit" Text="编辑" /> </td> <td> <asp:Label ID="idLabel" runat="server" Text='<%# Eval("id") %>' /> </td> <td> <asp:Label ID="nameLabel" runat="server" Text='<%# Eval("name") %>' /> </td> <td> <asp:Label ID="ageLabel" runat="server" Text='<%# Eval("age") %>' /> </td> </tr> </ItemTemplate> <LayoutTemplate> <table runat="server"> <tr runat="server"> <td runat="server"> <table ID="itemPlaceholderContainer" runat="server" border="0" style=""> <tr runat="server" style=""> <th runat="server"> </th> <th runat="server"> id</th> <th runat="server"> name</th> <th runat="server"> age</th> </tr> <tr runat="server" ID="itemPlaceholder"> </tr> </table> </td> </tr> <tr runat="server"> <td runat="server" style=""> </td> </tr> </table> </LayoutTemplate> </asp:ListView> <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" /> </div> </form> </body> </html>
在listview 的itemCommand中写入以下事件：
protected void ListView1_ItemCommand(object sender, ListViewCommandEventArgs e) { if (e.CommandName == "IncAge") { int i = ((ListViewDataItem)e.Item).DisplayIndex; // int id =(int)ListView1.DataKeys[i].Value; int id = (int)ListView1.DataKeys[i].Values["id"]; T_UserTableAdapter adapter = new T_UserTableAdapter(); adapter.IncAgeById(id); ListView1.DataBind(); } }
