Question

我有一个列表视图，我想从列表视图中选择多个项目，点击按钮需要对所选行进行一些操作。但是我无法从列表视图中获取值项目，下面是代码我试过了，我在这里做错了吗？

标记

<asp:ListView ID="LvOrders" runat="server" 
    GroupPlaceholderID="groupPlaceHolder1" 
    ItemPlaceholderID="itemPlaceHolder1"
    OnPagePropertiesChanging="OnPagePropertiesChanging">
    <LayoutTemplate>
        <table id="product-master" class="table table-bordered table-striped">
            <tr>
                <th><asp:CheckBox ID="ChkBox" runat="server" /></th>
                <th>Order #</th>
                <th>User Name</th>
                <th>Purchase Date</th>
                <th>Amount</th>
            </tr>
            <asp:PlaceHolder runat="server" ID="groupPlaceHolder1"></asp:PlaceHolder>
            <tr>
                <td colspan="3">

                    <asp:DataPager ID="DataPager1" runat="server" 
                        class="btn-group btn-group-sm" 
                        PagedControlID="LvOrders" 
                        PageSize="10">
                        <Fields>
                            <asp:NextPreviousPagerField PreviousPageText="<" 
                                FirstPageText="|<" 
                                ShowPreviousPageButton="true"
                                ShowFirstPageButton="true" 
                                ShowNextPageButton="false" 
                                ShowLastPageButton="false"
                                ButtonCssClass="btn btn-default" 
                                RenderNonBreakingSpacesBetweenControls="false" 
                                RenderDisabledButtonsAsLabels="false" />
                            <asp:NumericPagerField ButtonType="Link" 
                                CurrentPageLabelCssClass="btn btn-primary disabled" 
                                RenderNonBreakingSpacesBetweenControls="false"
                                NumericButtonCssClass="btn btn-default" 
                                ButtonCount="10" 
                                NextPageText="..." 
                                NextPreviousButtonCssClass="btn btn-default" />
                            <asp:NextPreviousPagerField NextPageText=">" 
                                LastPageText=">|" 
                                ShowNextPageButton="true"
                                ShowLastPageButton="true" 
                                ShowPreviousPageButton="false" 
                                ShowFirstPageButton="false"
                                ButtonCssClass="btn btn-default" 
                                RenderNonBreakingSpacesBetweenControls="false" 
                                RenderDisabledButtonsAsLabels="false" />
                        </Fields>
                    </asp:DataPager>
                </td>
            </tr>
        </table>
    </LayoutTemplate>
    <GroupTemplate>
        <tr>
            <asp:PlaceHolder runat="server" ID="itemPlaceHolder1">
            </asp:PlaceHolder>
        </tr>
    </GroupTemplate>
    <ItemTemplate>
        <td><asp:CheckBox ID="ChkBx" runat="server" /></td>
        <td><%# Eval("OrderNo") %></td>
        <td><%# Eval("Name") %></td>
        <td><%# Eval("Created") %></td>
        <td><%# Eval("Amount") %></td>
    </ItemTemplate>
</asp:ListView>

C＃代码

string res;
protected void btnAssign_Click(object sender, EventArgs e)
{
    foreach (ListViewItem row in LvOrders.Items)
    {
        CheckBox cb = (CheckBox)row.FindControl("ChkBox");
        if (cb != null)
        {
            if (cb.Checked == true)
            {
                ListViewItem item = LvOrders.Items[LvOrders.SelectedIndex];
                String c = item.FindControl("OrderNo").ToString();
                res = res + "" + c;// printing selected OrderNo
            }
        }
    }
}

Answer 1

你写过item.FindControl("OrderNo").ToString(); 但是在ASPX页面中你定义了<td><%# Eval("OrderNo") %></td> 所以，你没有定义任何控件，仍然想找到控件。因此，这将导致错误，选项是使用Label，以防您想要找到控件及其值。

PS：标记为答案，如果有帮助

Answer 2

您必须分配这样的ID。

<div id="aside" class="box">

    <div class="padding box">

        <!-- Logo (Max. width = 200px) -->
        <p id="logo">
            <a href="#">
                <img src="tmp/logo.gif" alt="Our logo" title="Visit Site" /></a>
        </p>
    </div>
    <!-- /padding -->

    <ul class="box">
        <li><a href="OPDRegister.aspx">New Patient Register</a></li>
        <li><a href="OldPatientRegistration.aspx">Old Patient Register</a></li>
        <li><a href="DetailRegistration.aspx">Detail Patient Register</a></li>
        <li id="submenu-active"><a href="#">Report</a>
            <!-- Active -->
            <ul>
                <li><a href="#">New Patient Report</a></li>
                <li><a href="#">Old Patient Report</a></li>
                <li><a href="#">Detail Patient Report</a></li>
            </ul>
        </li>
    </ul>
</div>

现在在代码隐藏

<ItemTemplate>
    <td>
        <asp:CheckBox ID="ChkBx" runat="server" />
    </td>
    <td>
        <asp:label ID="OrderNo" runat="server" 
            Text='<%# Eval("OrderNo") %>'>
        </asp:label>
    </td>
    <td><%# Eval("Name") %></td>
    <td><%# Eval("Created") %></td>
    <td><%# Eval("Amount") %></td>
</ItemTemplate>

从列表视图中选择多个项目，并在按钮单击时执行操作

2 个答案: