Asp.net 编辑ListView项会返回“不能在DropDownList中选择多个项”。如果FormView处于编辑模式
我有一个FormView和一个ListView，我只想在FormView的EditITemTemplate中使用。但是，当我在编辑模式下单击ListView中的编辑或更新链接按钮时，页面错误：不能在DropDownList中选择多个项目。正如您在下面看到的，我已经从FormView中完全删除了ListView，如果FormView处于只读状态，ListView的功能将与预期的一样Asp.net 编辑ListView项会返回“不能在DropDownList中选择多个项”。如果FormView处于编辑模式,asp.net,listview,drop-down-menu,formview,Asp.net,Listview,Drop Down Menu,Formview,我有一个FormView和一个ListView，我只想在FormView的EditITemTemplate中使用。但是，当我在编辑模式下单击ListView中的编辑或更新链接按钮时，页面错误：不能在DropDownList中选择多个项目。正如您在下面看到的，我已经从FormView中完全删除了ListView，如果FormView处于只读状态，ListView的功能将与预期的一样 <asp:SqlDataSource ID="SqlSource" runat="server
<asp:SqlDataSource ID="SqlSource" runat="server" ConnectionString="<%$ ConnectionStrings:RTUConnectionString %>"
SelectCommand="SELECT *, '' LogInput FROM [nei_list] WHERE [nei_id]=@ID">
<SelectParameters>
<asp:QueryStringParameter Name="ID" QueryStringField="ID" />
</SelectParameters>
</asp:SqlDataSource>
<asp:SqlDataSource ID="SqlNEIT" runat="server" ConnectionString="<%$ ConnectionStrings:RTUConnectionString %>"
SelectCommand="SELECT ID TID, CLLI, EquipmentType, Officecode, OfficeName, WorkingLines, Testable Tstbl FROM NEI_Testable WHERE CLLI=@ID ORDER BY [EquipmentType], OfficeCode"
UpdateCommand="UPDATE NEI_Testable SET Testable = @Tstbl WHERE ID=@TID"
>
<SelectParameters>
<asp:QueryStringParameter Name="ID" QueryStringField="ID" />
</SelectParameters>
<UpdateParameters>
<asp:Parameter Name="Tstbl" Type="String" />
<asp:Parameter Name="TID" Type="String" />
</UpdateParameters>
</asp:SqlDataSource>
<asp:FormView ID="FormView1" runat="server" DataSourceID="SqlSource" DefaultMode="ReadOnly">
<EditItemTemplate>
<table cellpadding="6" style="width: 100%">
<tr style="font-size:large; background-color: #006600; color: #FFFFFF;">
<td style="padding: 2px" align="center"></b></td>
<td style="padding: 2px" colspan="5" align="left"><b>NEI Maintenance and Inventory Log</b></td></tr>
<tr>
<td style="font-size:small; background-color:#CEF6CE; color: #333333; width: 130px;"><B>Location ID:</B></td>
<td style="font-size:medium; background-color: #E8E8E8;color: #284775; "><asp:Textbox ID="txtLocID" runat="server" Text='<%# Bind("Location_ID") %>' /></td>
<td style="font-size:small; background-color:#CEF6CE; color: #333333; width: 130px;"><B>Location Name:</B></td>
<td style="font-size:medium; background-color: #E8E8E8;color: #284775; "><asp:Textbox ID="txtLocName" runat="server" Text='<%# Bind("LOCATION_NAME") %>' /></td>
<td style="font-size:small; background-color:#CEF6CE; color: #333333; width: 130px;"><B>NET_LOC_TYPE_ID:</B></td>
<td style="font-size:medium; background-color: #E8E8E8;color: #284775; "><asp:Textbox ID="txtNETLOC" runat="server" Text='<%# Bind("NET_LOC_TYPE_ID") %>' /></td>
</tr>
<tr>
<td style="font-size:small; background-color:#CEF6CE; color: #333333; width: 130px;"><B>Host:</B></td>
<td style="font-size:medium; background-color: #E8E8E8;color: #284775; "><asp:Textbox ID="txtHOST" runat="server" Text='<%# Bind("MAIN_ID") %>' /></td>
<td style="font-size:small; background-color:#CEF6CE; color: #333333; width: 130px;"><B>EXCH AREA CLLI:</B></td>
<td style="font-size:medium; background-color: #E8E8E8;color: #284775; "><asp:Textbox ID="txtEXCH" runat="server" Text='<%# Bind("EXCHANGE_AREA_CLLI") %>' /></td>
<td style="font-size:small; background-color:#CEF6CE; color: #333333; width: 130px;"><B>OP CO NUM:</B></td>
<td style="font-size:medium; background-color: #E8E8E8;color: #284775; "><asp:Textbox ID="txtOPCO" runat="server" Text='<%# Bind("OPERATING_COMPANY_NUMBER") %>' /></td>
</tr>
<tr>
<td style="font-size:small; background-color:#CEF6CE; color: #333333; width: 130px;"><B></B></td>
<td style="font-size:small; background-color:#E8E8E8; color: #333333; width: 130px;"><B>System:</B></td>
<td style="font-size:small; background-color:#CEF6CE; color: #333333; width: 130px;"><B>Testable:</B></td>
<td style="font-size:small; background-color:#E8E8E8; color: #333333; width: 130px;"><B>RTU:</B></td>
<td style="font-size:small; background-color:#CEF6CE; color: #333333; width: 130px;"><B>EXT:</B></td>
<td style="font-size:small; background-color:#E8E8E8; color: #333333; width: 130px;"><B>NEI:</B></td>
</tr>
<tr>
<td style="font-size:medium; background-color: #CEF6CE;color: #284775; "></td>
<td style="font-size:medium; background-color: #E8E8E8;color: #284775; ">
<asp:DropDownList ID="ddlSys" runat="server" SelectedValue='<%# Bind("system") %>' Enabled="True" >
<asp:ListItem Value="AC" Selected="True">AC</asp:ListItem>
<asp:ListItem Value="OSG" Selected="True">OSG</asp:ListItem>
</asp:DropDownList>
</td>
<td style="font-size:medium; background-color: #CEF6CE;color: #284775; ">
<asp:DropDownList ID="ddlTst" runat="server" SelectedValue='<%# Bind("testable") %>' Enabled="True" >
<asp:ListItem Value="YES" Selected="True">YES</asp:ListItem>
<asp:ListItem Value="NO" Selected="True">NO</asp:ListItem>
</asp:DropDownList>
</td>
<td style="font-size:medium; background-color: #E8E8E8;color: #284775; ">
<asp:DropDownList ID="ddlRTU" runat="server" SelectedValue='<%# Bind("RTU") %>' Enabled="True" >
<asp:ListItem Value="YES" Selected="True">YES</asp:ListItem>
<asp:ListItem Value="NO" Selected="True">NO</asp:ListItem>
</asp:DropDownList>
</td>
<td style="font-size:medium; background-color: #CEF6CE;color: #284775; ">
<asp:DropDownList ID="ddlEXT" runat="server" SelectedValue='<%# Bind("EXT") %>' Enabled="True" >
<asp:ListItem Value="YES" Selected="True">YES</asp:ListItem>
<asp:ListItem Value="NO" Selected="True">NO</asp:ListItem>
</asp:DropDownList>
</td>
<td style="font-size:medium; background-color: #E8E8E8;color: #284775; ">
<asp:DropDownList ID="ddlNEI" runat="server" SelectedValue='<%# Bind("NEI") %>' Enabled="True" >
<asp:ListItem Value="YES" Selected="True">YES</asp:ListItem>
<asp:ListItem Value="NO" Selected="True">NO</asp:ListItem>
</asp:DropDownList>
</td>
</tr>
<tr>
<td style="font-size:small; background-color:#CEF6CE; color: #333333; text-align:center"><B>*<%#Request.Cookies["RTUA"]["NAME"].ToString() %>*<br />*<%#DateTime.Now.ToString("MM-dd-yyyy h:mmtt") %>*</B></td>
<td colspan="5" style="font-size:medium; background-color: #E8E8E8;color: #284775;"><asp:Textbox ID="txtREMARKS" runat="server" Text='<%# Bind("LogInput") %>' Rows="5" TextMode="MultiLine" Width="100%" /></td>
</tr>
<tr style="font-size:large; background-color: #006600; color: #FFFFFF;">
<td style="padding: 2px" align="center"><b><asp:button id="UpdateButton" CausesValidation="True" text="Update" commandname="Update" runat="server" ForeColor="#003300"/> </b></td>
<td style="padding: 2px" colspan="5" align="left"><b></b></td></tr>
<tr>
</tr>
</table>
</EditItemTemplate>
<ItemTemplate>
<table cellpadding="6" style="width: 100%">
<tr style="font-size:large; background-color: #006600; color: #FFFFFF;">
<td style="padding: 2px" align="center"><b><asp:button id="EditButton" text="EDIT" commandname="Edit" runat="server" ForeColor="#003300"/> </b></td>
<td style="padding: 2px" colspan="5" align="left"><b>NEI Maintenance and Inventory Log</b></td></tr>
<tr>
<td style="font-size:small; background-color:#CEF6CE; color: #333333; width: 130px;"><B>Location ID:</B></td>
<td style="font-size:medium; background-color: #E8E8E8;color: #284775; "><asp:Label ID="lblLocID" runat="server" Text='<%# Bind("Location_ID") %>' /></td>
<td style="font-size:small; background-color:#CEF6CE; color: #333333; width: 130px;"><B>Location Name:</B></td>
<td style="font-size:medium; background-color: #E8E8E8;color: #284775; "><asp:Label ID="lblLocName" runat="server" Text='<%# Bind("LOCATION_NAME") %>' /></td>
<td style="font-size:small; background-color:#CEF6CE; color: #333333; width: 130px;"><B>NET_LOC_TYPE_ID:</B></td>
<td style="font-size:medium; background-color: #E8E8E8;color: #284775; "><asp:Textbox ID="lblNETLOC" runat="server" Text='<%# Bind("NET_LOC_TYPE_ID") %>' /></td>
</tr>
<tr>
<td style="font-size:small; background-color:#CEF6CE; color: #333333; width: 130px;"><B>Host:</B></td>
<td style="font-size:medium; background-color: #E8E8E8;color: #284775; "><asp:Label ID="lblHOST" runat="server" Text='<%# Bind("MAIN_ID") %>' /></td>
<td style="font-size:small; background-color:#CEF6CE; color: #333333; width: 130px;"><B>EXCH AREA CLLI:</B></td>
<td style="font-size:medium; background-color: #E8E8E8;color: #284775; "><asp:Label ID="lblEXCH" runat="server" Text='<%# Bind("EXCHANGE_AREA_CLLI") %>' /></td>
<td style="font-size:small; background-color:#CEF6CE; color: #333333; width: 130px;"><B>OP CO NUM:</B></td>
<td style="font-size:medium; background-color: #E8E8E8;color: #284775; "><asp:Label ID="lblOPCO" runat="server" Text='<%# Bind("OPERATING_COMPANY_NUMBER") %>' /></td>
</tr>
</Table>
</ItemTemplate>
</asp:FormView>
<asp:ListView ID="lvNEIT" runat="server" DataSourceID="SqlNEIT">
<ItemTemplate>
<tr style="font-size:small; background-color: #FFFFFF;color: #284775;">
<td></td>
<td align="center">
<asp:Label ID="lblNEIID" runat="server" Text='<%# Bind("TID") %>' Visible="false" />
<asp:Label ID="lblNEIEQT" runat="server" Text='<%# Eval("EquipmentType") %>' />
</td>
<td align="center">
<asp:Label ID="lblNEION" runat="server" Text='<%# Eval("OfficeName") %>' />
</td>
<td align="center">
<asp:Label ID="lblNEIOC" runat="server" Text='<%# Eval("OfficeCode") %>' />
</td>
<td align="center">
<asp:Label ID="lblNEIWL" runat="server" Text='<%# Eval("WorkingLines") %>' />
</td>
<td align="right">
<asp:DropDownList ID="ddlNEITST" runat="server" SelectedValue='<%# Bind("Tstbl") %>' Enabled="False" >
<asp:ListItem Value="YES" Selected="True">YES</asp:ListItem>
<asp:ListItem Value="NO" Selected="True">NO</asp:ListItem>
<asp:ListItem Value="UNK" Selected="True">UNK</asp:ListItem>
</asp:DropDownList>
<asp:LinkButton ID="btnNEIEdit" runat="server" Text="Edit" CommandName="Edit" />
</td>
</tr>
</ItemTemplate>
<EditItemTemplate>
<tr style="font-size:small; background-color: #FFFFFF;color: #284775;">
<td></td>
<td align="center">
<asp:Label ID="lblNEIID" runat="server" Text='<%# Bind("TID") %>' Visible="false" />
<asp:Label ID="lblNEIEQT" runat="server" Text='<%# Bind("EquipmentType") %>' />
</td>
<td align="center">
<asp:Label ID="lblNEION" runat="server" Text='<%# Bind("OfficeName") %>' />
</td>
<td align="center">
<asp:Label ID="lblNEIOC" runat="server" Text='<%# Bind("OfficeCode") %>' />
</td>
<td align="center">
<asp:Label ID="lblNEIWL" runat="server" Text='<%# Bind("WorkingLines") %>' />
</td>
<td align="right">
<asp:DropDownList ID="ddlNEITST" runat="server" SelectedValue='<%# Bind("Tstbl") %>' Enabled="True" >
<asp:ListItem Value="YES" Selected="True">YES</asp:ListItem>
<asp:ListItem Value="NO" Selected="True">NO</asp:ListItem>
<asp:ListItem Value="UNK" Selected="True">UNK</asp:ListItem>
</asp:DropDownList>
<asp:LinkButton ID="btnNEISave" runat="server" Text="Update" CommandName="Update" />
</td>
</tr>
</EditItemTemplate>
<LayoutTemplate>
<table width="98%" cellpadding="5" cellspacing="3" runat="server">
<tr align="center" 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></tr>
<tr runat="server" style="font-size:small; background-color:#006600; color: #FFFFFF;">
<th runat="server"></th>
<th runat="server">EquipmentType</th>
<th runat="server">OfficeName</th>
<th runat="server">OfficeCode</th>
<th runat="server">WorkingLines</th>
<th runat="server">Testable</th>
</tr>
<tr id="itemPlaceholder" runat="server">
</tr>
</table>
</td>
</tr>
</table>
</LayoutTemplate>
</asp:ListView>
提前感谢您应该使用ListBox控件而不是dropdownlist
<asp:ListBox runat="server" ID="ddlSys" SelectionMode="multiple">
<asp:ListItem Value="AC" Selected="True">AC</asp:ListItem>
<asp:ListItem Value="OSG" Selected="True">OSG</asp:ListItem>
</asp:ListBox>
我的ListItem中包含的每一个Selected=True。去掉这个，一切都很完美
似乎这个愚蠢的错误会导致页面在第一次绑定事件时失败，而不仅仅是在FormView和ListView都处于编辑模式时发生。为什么是ListBox？它应该是一个非此即彼的选项，所以SelectionMode=multiple是错误的。此外，您选择交换的ddlSys位于FormView中，它本身就可以正常工作。导致错误的是ListView组件。这个选择也应该是一个非此即彼的选项。好的，我明白了。这些应该一直是一项选择，由SelectedValue=设置。谢谢你引起我的注意。