ASP.NET3.5中包含了新的数据绑定控件--ListView，这是一个类似与repeater与gridview结合的控件，可以实现添加，删除功能，同时还可以像repeater一样灵活的控制页面的布局。该控件包含了很多新的模板，比如GroupTemplate等新增的模板，可以方便的分组显示数据。详细的大家可以去查MSDN文档。
我一直认为学习数据绑定控件从最简单的增删改查开始，可以对该控件有较深刻的理解，这样可以举一反三，在进行综合运用。今天这篇文章还是从最基本的数据操作开始，对ListView有个感性的认识。
首先看一下程序运行的效果：
页面源码：
<asp:ListView ID="ListView1" runat="server" OnSelectedIndexChanging="ListView1_SelectedIndexChanging" OnItemCommand="ListView1_ItemCommand" OnItemEditing="ListView1_ItemEditing" OnItemCanceling="ListView1_ItemCanceling" OnItemDataBound="ListView1_ItemDataBound" OnPagePropertiesChanging="ListView1_PagePropertiesChanging" OnItemInserting="ListView1_ItemInserting" OnItemUpdating="ListView1_ItemUpdating" OnSorting="ListView1_Sorting" EnableViewState="true" InsertItemPosition="LastItem" onitemdeleting="ListView1_ItemDeleting"> <LayoutTemplate> <asp:PlaceHolder ID="itemPlaceholder" runat="server"></asp:PlaceHolder> <p> <asp:DataPager ID="MyPage" runat="server" PageSize="6"> <Fields> <asp:NumericPagerField ButtonCount="10" PreviousPageText="<-- " NextPageText="-->" />
<%...-- <asp:NextPreviousPagerField ButtonType="Button" ShowFirstPageButton="true" ShowLastPageButton="true"
ShowNextPageButton="true" ShowPreviousPageButton="true" />--%> </Fields> </asp:DataPager> </p> </LayoutTemplate> <ItemTemplate> <i> <%...#Eval("SupplierID")%></i> <p> <b> <%...#Eval("CompanyName")%></b></p> <p> <%...#Eval("ContactName")%></p> <p> <%...#Eval("Address")%></p> <p> <%...#Eval("City")%></p> <asp:Button ID="btnEdit" runat="server" Text="Edit" CommandName="Edit" /> <asp:Button ID="btnDelete" runat="server" Text="Delete" CommandName="Delete" /> <%...-- <asp:LinkButton ID="lbtnSort" runat="server" Text="Sort" CommandName="Sort" CommandArgument="CompanyName" ></asp:LinkButton>--%> </ItemTemplate> <EditItemTemplate> <asp:TextBox ID="txtMy" runat="server" Text='<%#bind("SupplierID") %>'></asp:TextBox> <asp:TextBox ID="TextBox1" runat="server" Text='<%#bind("CompanyName") %>'></asp:TextBox> <asp:TextBox ID="TextBox2" runat="server" Text='<%#bind("ContactName") %>'></asp:TextBox> <asp:TextBox ID="TextBox3" runat="server" Text='<%#bind("Address") %>'></asp:TextBox> <asp:TextBox ID="TextBox4" runat="server" Text='<%#bind("City") %>'></asp:TextBox> <asp:Button ID="btnUpdate" runat="server" Text="Update" CommandName="Update" /> <asp:Button ID="btnCancle" runat="server" Text="Cancle" CommandName="Cancel" /> </EditItemTemplate> <InsertItemTemplate> <asp:TextBox ID="txtMy" runat="server" Text='<%#bind("SupplierID") %>'></asp:TextBox> <asp:TextBox ID="TextBox1" runat="server" Text='<%#bind("CompanyName") %>'></asp:TextBox> <asp:TextBox ID="TextBox2" runat="server" Text='<%#bind("ContactName") %>'></asp:TextBox> <asp:TextBox ID="TextBox3" runat="server" Text='<%#bind("Address") %>'></asp:TextBox> <asp:TextBox ID="TextBox4" runat="server" Text='<%#bind("City") %>'></asp:TextBox> <asp:Button ID="btnUpdate" runat="server" Text="Insert" CommandName="Insert" /> <asp:Button ID="btnCancle" runat="server" Text="Cancle" CommandName="Cancel" /> </InsertItemTemplate> <ItemSeparatorTemplate> <div style="height: 0px; border-top: dashed 1px #ff0000"> </div> </ItemSeparatorTemplate> </asp:ListView>
这部分代码中有个重要的部分就是通过<LayoutTemplate>模板来设置控件的样式，布局，这也是新增的模板。在VS.NET2008的正式版本中，要正常运行页面必须在该模板中加入一个名为itemPlaceholder的PlaceHolder控件。要不会出现如下异常：
An item placeholder must be specified on ListView 'ListView1'. Specify an item placeholder by setting a control's ID property to "itemPlaceholder".
<ItemTemplate>模板用来绑定显示到页面上的数据， <EditItemTemplate>用来显示处于编辑状态的时候显示的数据，其他的可以以此类推。
与ListView还搭配的一起使用了新增的DataPager控件，这个主要是用于ListView控件的分页，是新增的分页空也，可以方便，高效的进行分页。
后台代码：
string ConStr = ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString; protected void Page_Load(object sender, EventArgs e) ...{
if (!IsPostBack)
...{ ViewState["SupplierID"] = "SupplierID"; ViewState["Direction"] = "DESC"; BindListView();
} } private void BindListView() ...{ string QueryCon = "SELECT SupplierID,CompanyName,ContactName,Address,City FROM Suppliers"; SqlConnection NorthWindCon = new SqlConnection(ConStr); SqlDataAdapter NorthWindDa = new SqlDataAdapter(QueryCon, ConStr); DataSet Ds = new DataSet(); NorthWindDa.Fill(Ds, "Suppliers"); ListView1.DataKeyNames = new string[] ...{ "SupplierID" }; DataView Dv = Ds.Tables["Suppliers"].DefaultView; //排序表达式 string SortExpress = (string)ViewState["SupplierID"] + " " + (string)ViewState["Direction"]; Dv.Sort = SortExpress; //绑定数据源 //ListView1.DataSource = Ds.Tables["Suppliers"]; ListView1.DataSource = Dv; ListView1.DataBind(); } protected void ListView1_ItemEditing(object sender, ListViewEditEventArgs e) ...{ ListView1.EditIndex = e.NewEditIndex; BindListView(); } protected void ListView1_ItemDataBound(object sender, ListViewItemEventArgs e) ...{ if (e.Item.ItemType == ListViewItemType.DataItem) ...{ ((Button)e.Item.FindControl("btnDelete")).Attributes["onclick"] = "if(!confirm('你真的要删除这条记录么?'))return false;"; } } protected void ListView1_ItemCanceling(object sender, ListViewCancelEventArgs e) ...{ //取消编辑 if (e.CancelMode == ListViewCancelMode.CancelingEdit)