ajax中使用Listview控件邦定DropdownList控件-技术开发专区

ajax中使用Listview控件邦定DropdownList控件

作者：redw博客编辑： nancy 2008-01-24 00:00
【IT168技术文档】

Listview控件是VS2008中新增控件，相关的使用方法也有不少了，但是在AJAX中配合DropdownList控件的介绍却不多见。我在使用过程中出现下面的情况：
“Eval()、XPath() 和 Bind() 这类数据绑定方法只能在数据绑定控件的上下文中使用。”的错误

如何解决这个问题，结合http://www.webswapp.com/codesamples/aspnet20/dependentlists/default.aspx的资料，希望能给刚开始使用的朋友一些帮助。
    <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:ListView ID="ListView1" runat="server" DataKeyNames="UserID" DataSourceID="SqlDataSource1"
InsertItemPosition="LastItem" OnItemUpdating="ListView1_ItemUpdating"
oniteminserting="ListView1_ItemInserting">
<AlternatingItemTemplate>
<tr style="background-color: #FAFAD2; color: #284775;">
<td>
<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="UserIDLabel" runat="server" Text='<%# Eval("UserID") %>' />
</td>
<td>
<asp:Label ID="USER_NAMELabel" runat="server" Text='<%# Eval("USER_NAME") %>' />
</td>
<td>
<asp:Label ID="USER_PASSWORDLabel" runat="server" Text='<%# Eval("USER_PASSWORD") %>' />
</td>
<td>
<asp:Label ID="RoleIdLabel" runat="server" Text='<%# Eval("RoleId") %>' />
</td>
<td>
<asp:Label ID="USER_DWBMLabel" runat="server" Text='<%# Eval("USER_DWBM") %>' />
</td>
<td>
<asp:Label ID="DEPCODELabel" runat="server" Text='<%# Eval("DEPCODE") %>' />
</td>
</tr>
</AlternatingItemTemplate>
<LayoutTemplate>
<table runat="server">
<tr runat="server">
<td runat="server">
<table id="itemPlaceholderContainer" runat="server" border="1" style="background-color: #FFFFFF;
border-collapse: collapse; border-color: #999999; border-style: none; border-width: 1px;
font-family: Verdana, Arial, Helvetica, sans-serif;">
<tr runat="server" style="background-color: #FFFBD6; color: #333333;">
<th runat="server">
</th>
<th runat="server">
用户ID
</th>
<th runat="server">
用户名
</th>
<th runat="server">
用户密码
</th>
<th runat="server">
所属角色
</th>
<th runat="server">
用户矿籍
</th>
<th runat="server">
用户单位
</th>
</tr>
<tr id="itemPlaceholder" runat="server">
</tr>
</table>
</td>
</tr>
<tr runat="server">
<td runat="server" style="text-align: center; background-color: #FFCC66; font-family: Verdana, Arial, Helvetica, sans-serif;
color: #333333;">
<asp:DataPager ID="DataPager1" runat="server">
<Fields>
<asp:NextPreviousPagerField ButtonType="Button" ShowFirstPageButton="True" ShowLastPageButton="True" />
</Fields>
</asp:DataPager>
</td>
</tr>
</table>
</LayoutTemplate>
<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>
<asp:TextBox ID="UserIDTextBox" runat="server" Text='<%# Bind("UserID") %>' Width="70" />
</td>
<td>
<asp:TextBox ID="USER_NAMETextBox" runat="server" Text='<%# Bind("USER_NAME") %>'
Width="70" />
</td>
<td>
<asp:TextBox ID="USER_PASSWORDTextBox" runat="server" Text='<%# Bind("USER_PASSWORD") %>'
Width="70" />
</td>
<td>
<asp:DropDownList ID="roleddl" runat="server" DataSourceID="sqlroleds" DataValueField="RoleId"
DataTextField="RoleName" OnDataBound="roleddl_DataBound">
</asp:DropDownList>
</td>
<td>
<asp:TextBox ID="USER_DWBMTextBox" runat="server" Text='<%# Bind("USER_DWBM") %>'
Width="70" />
</td>
<td>
<asp:TextBox ID="DEPCODETextBox" runat="server" Text='<%# Bind("DEPCODE") %>' Width="70" />
</td>
</tr>
</InsertItemTemplate>
<SelectedItemTemplate>
<tr style="background-color: #FFCC66; font-weight: bold; color: #000080;">
<td>
<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="UserIDLabel" runat="server" Text='<%# Eval("UserID") %>' />
</td>
<td>
<asp:Label ID="USER_NAMELabel" runat="server" Text='<%# Eval("USER_NAME") %>' />
</td>
<td>
<asp:Label ID="USER_PASSWORDLabel" runat="server" Text='<%# Eval("USER_PASSWORD") %>' />
</td>
<td>
<asp:Label ID="RoleIdLabel" runat="server" Text='<%# Eval("RoleId") %>' />
</td>
<td>
<asp:Label ID="USER_DWBMLabel" runat="server" Text='<%# Eval("USER_DWBM") %>' />
</td>
<td>
<asp:Label ID="DEPCODELabel" runat="server" Text='<%# Eval("DEPCODE") %>' />
</td>
</tr>
</SelectedItemTemplate>
<EmptyDataTemplate>
<table runat="server" style="background-color: #FFFFFF; border-collapse: collapse;
border-color: #999999; border-style: none; border-width: 1px;">
<tr>
<td>
No data was returned.
</td>
</tr>
</table>
</EmptyDataTemplate>
<EditItemTemplate>
<tr style="background-color: #FFCC66; color: #000080;">
<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="UserIDLabel1" runat="server" Text='<%# Eval("UserID") %>' />
</td>
<td>
<asp:TextBox ID="USER_NAMETextBox" runat="server" Text='<%# Bind("USER_NAME") %>'
Width="70" />
</td>
<td>
<asp:TextBox ID="USER_PASSWORDTextBox" runat="server" Text='<%# Bind("USER_PASSWORD") %>'
Width="70" />
</td>
<td>
<%--在listview EdititemTemplate中定义一个ID为roleddl的DropDownList控件
OnDataBound事件邦定roleddl_DataBound事件
--%>                               <asp:DropDownList ID="roleddl" runat="server" DataSourceID="sqlroleds" DataValueField="RoleId"
DataTextField="RoleName" OnDataBound="roleddl_DataBound">
</asp:DropDownList>
</td>
<td>
<asp:TextBox ID="USER_DWBMTextBox" runat="server" Text='<%# Bind("USER_DWBM") %>'
Width="70" />
</td>
<td>
<asp:TextBox ID="DEPCODETextBox" runat="server" Text='<%# Bind("DEPCODE") %>' Width="70" />
</td>
</tr>
</EditItemTemplate>
<ItemTemplate>
<tr style="background-color: #FFFBD6; color: #333333;">
<td>
<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="UserIDLabel" runat="server" Text='<%# Eval("UserID") %>' />
</td>
<td>
<asp:Label ID="USER_NAMELabel" runat="server" Text='<%# Eval("USER_NAME") %>' />
</td>
<td>
<asp:Label ID="USER_PASSWORDLabel" runat="server" Text='<%# Eval("USER_PASSWORD") %>' />
</td>
<td>
<asp:Label ID="RoleIdLabel" runat="server" Text='<%# Eval("RoleId") %>' />
</td>
<td>
<asp:Label ID="USER_DWBMLabel" runat="server" Text='<%# Eval("USER_DWBM") %>' />
</td>
<td>
<asp:Label ID="DEPCODELabel" runat="server" Text='<%# Eval("DEPCODE") %>' />
</td>
</tr>
</ItemTemplate>
</asp:ListView>
</ContentTemplate>
</asp:UpdatePanel>
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