在ListBox选择之后更新Modal中的TextBox

Question

我在Bootstrap模式中有一个Listbox和一个Textbox。我需要使用列表框中的选定值更新TextBox。我的问题是为了从列表框中获取选择的值我需要进行自动回发。回发导致模态关闭。

这是全模式代码：

 <div id="modalBillOLMapping" class="modal colored-header" style="display:none" >
    <div class="md-content">
        <div class="modal-header">
        <button type="button" data-dismiss="modal" aria-hidden="true" class="close md-close"><i class="icon s7-close"></i></button>
        <h3 class="modal-title">
            <asp:Label ID="Label1" runat="server" Text="Field Mapping"></asp:Label>
        </h3>
    </div>   
    <div class="modal-body form" style="padding: 0px!important;">
        <asp:UpdatePanel runat="server">
            <ContentTemplate>
        <div class="panel panel-alt3 panel-transparent">
            <div class="panel-heading panel-heading-cg">
                <button runat="server" type="button" id="btnSaveOLMapping" class="btn btn-alt3" onclick="javascript:CloseModal('modalBillOLMapping');" data-dismiss="modal" onserverclick="btnSaveMapping_ServerClick"><i class="icon s7-check"></i>&nbsp;Save</button>
                <button type="button" class="btn btn-alt3 md-close"><i class="icon s7-close"></i>&nbsp;Cancel</button>
            </div>
            <div class="panel-body" style="height:300px">
                <asp:UpdatePanel runat="server">
                    <ContentTemplate>
                        <div class="row" style="padding-bottom:5px">
                            <div class="col-xs-2">
                                <asp:Label runat="server" ID="lblBillOLMapName" CssClass="text-danger"  ToolTip="Name of the current mapping">Map Name</asp:Label>
                            </div>
                            <div class="col-xs-4">
                                <asp:TextBox runat="server" ID="txtBillOLMapName"></asp:TextBox>
                            </div>
                        </div> 
                        <table style="width:100%">
                            <thead>
                                <tr><th style="width:25%">Quickbooks Field</th>
                                    <th style="width:25%">Charge Item Field</th>
                                    <th style="width:25%">Static Value</th>
                                    <th style="width:25%">Concatenated Value</th>
                                </tr>
                            </thead>
                            <tbody>
                                <tr>
                                    <td><asp:Label runat="server" ID="lblBillOLDocNumber" CssClass="text-danger" ToolTip="Mandatory Field - Bill reference number" Width="200px">DocNumber</asp:Label></td>
                                    <td><asp:DropDownList ID="ddlBillOLDocNumber" runat="server" AutoPostBack="false" Width="250px" ></asp:DropDownList></td>
                                    <td><asp:TextBox runat="server" ID="txtStaticBillOLDocNumber" Height="25px" Width="250px"></asp:TextBox></td>
                                    <td>
                                        <div class="input-group">
                                            <span class="input-addon input-group-btn">
                                                <asp:TextBox ID="txtConBillOLDocNumber" runat="server" Width="250px" Height="22px" ClientIDMode="Static"></asp:TextBox>

                                                    <a class="btn btn-primary dropdown-toggle toggle-menu" data-toggle="dropdown" href="#" style="height:22px">
                                                    <i class="icon s7-angle-down" style="font-size:x-large"></i>
                                                </a>
                                                <ul class="dropdown-menu">
                                                    <li>
                                                        <asp:ListBox runat="server" ID="lbConBillOLDocNumber" ClientIDMode="Static"></asp:ListBox>
                                                    </li>

                                                </ul>
                                            </span>
                                        </div>
                                    </td>
                                </tr>
                                <tr>
                                    <td><asp:Label runat="server" ID="lblBillOLTxnDate" ToolTip="The date of the bill, if you leave out of the mapping, the current date in Quickbooks Online will be used.">Transaction Date</asp:Label></td>
                                    <td><asp:DropDownList ID="ddlBillOLTxnDate" runat="server" AutoPostBack="false" Width="250px"></asp:DropDownList></td>
                                    <td><asp:TextBox runat="server" ID="txtStaticBillOLTxnDate" Width="250px" Height="22px"></asp:TextBox></td>
                                    <td><div class="input-group" >
                                        <span class="input-addon input-group-btn">
                                        <asp:TextBox runat="server" ID ="txtConBillOLTxnDate" Width="250px" Height="22px"></asp:TextBox>
                                            <a class="btn btn-primary dropdown-toggle toggle-menu" data-toggle="dropdown" href="#" style="height:22px">
                                            <i class="icon s7-angle-down" style="font-size:x-large"></i>
                                                </a>
                                                <ul class="dropdown-menu">
                                                    <li>
                                                        <asp:ListBox runat="server" ID="lbConBillOLTxnDate" ClientIDMode="Static"></asp:ListBox>
                                                    </li>

                                                </ul>
                                        </span>
                                        </div>
                                    </td>
                                </tr>
                                <tr>
                                    <td><asp:Label runat="server" ID="lblBillOLPrivateNote" ToolTip="User entered, organization-private note about the transaction. This note will not appear on the transaction records by default.">Private Note</asp:Label></td>
                                    <td><asp:DropDownList ID="ddlBillOLPrivateNote" runat="server" AutoPostBack="false" Width="250px"></asp:DropDownList></td>
                                    <td><asp:TextBox runat="server" ID="txtStaticBillOLPrivateNote" Width="250px" Height="22px"></asp:TextBox></td>
                                    <td><div class="input-group">
                                        <span class="input-addon input-group-btn">
                                            <asp:TextBox runat="server" ID="txtConBillOLPrivateNote" Width="250px" Height="22px"></asp:TextBox>
                                            <a class="btn btn-primary dropdown-toggle toggle-menu" data-toggle="dropdown" href="#" style="height:22px">
                                            <i class="icon s7-angle-down" style="font-size:x-large"></i>
                                                </a>
                                                <ul class="dropdown-menu">
                                                    <li>
                                                        <asp:ListBox runat="server" ID="lbConBillOLPrivateNote"></asp:ListBox>
                                                    </li>

                                                </ul>
                                        </span>
                                        </div></td>
                                </tr>
                            </tbody>
                        </table>

                        <div class="row" style="padding-bottom:5px">
                    <div class="col-x-6">
                        <asp:Label runat="server" ID="lblBillOLLineDescription" ToolTip="Description for the expense line">Line Description</asp:Label>
                    </div>
                    <div class="col-xs-6">
                        <asp:DropDownList ID="ddlBillOLLineDescription" runat="server" AutoPostBack="false" Width="350px"></asp:DropDownList>
                    </div>
                </div>
                <div class="row" style="padding-bottom:5px">
                    <div class="col-x-6">
                        <asp:Label runat="server" ID="lblBillOLLineAmount" ToolTip="Amount of Expense">Line Amount</asp:Label>
                    </div>
                    <div class="col-xs-6">
                        <asp:DropDownList ID="ddlBillOLLineAmount" runat="server" AutoPostBack="false" Width="350px"></asp:DropDownList>
                    </div>
                </div>
                <div class="row" style="padding-bottom:5px">
                    <div class="col-x-6">
                        <asp:Label runat="server" ID="lblBillOLLineCustomerRef" ToolTip="Customer name associated with the expense">Line Customer Ref</asp:Label>
                    </div>
                    <div class="col-xs-6">
                        <asp:DropDownList ID="ddlBillOLLineCustomerRef" runat="server" AutoPostBack="false" Width="350px"></asp:DropDownList>
                    </div>
                </div>
                <div class="row" style="padding-bottom:5px">
                    <div class="col-x-6">
                        <asp:Label runat="server" ID="lblBillOLLineAccountClass" ToolTip="Class associated with the expense">Line Account Class</asp:Label>
                    </div>
                    <div class="col-xs-6">
                        <asp:DropDownList ID="ddlBillOLLineAccountClass" runat="server" AutoPostBack="false" Width="350px"></asp:DropDownList>
                    </div>
                </div>
                <div class="row" style="padding-bottom:5px">
                    <div class="col-x-6">
                        <asp:Label runat="server" ID="lblBillOLLineAccountRef" ToolTip="Name of the expense account">Line Account Ref</asp:Label>
                    </div>
                    <div class="col-xs-6">
                        <asp:DropDownList ID="ddlBillOLLineAccountRef" runat="server" AutoPostBack="false" Width="350px"></asp:DropDownList>
                    </div>
                </div>
                <div class="row" style="padding-bottom:5px">
                    <div class="col-x-6">
                        <asp:Label runat="server" ID="lblBillOLVendorRef" CssClass="text-warning" ToolTip="Mandatory - Full name of the vendor">Line Account Ref</asp:Label>
                    </div>
                    <div class="col-xs-6">
                        <asp:DropDownList ID="ddlBillOLVendorRef" runat="server" AutoPostBack="false" Width="350px"></asp:DropDownList>
                    </div>
                </div>
                <div class="row" style="padding-bottom:5px">
                    <div class="col-x-6">
                        <asp:Label runat="server" ID="lblBillOLAPAccount" ToolTip="The Accounts Payable account the purchase is credited">AP Account</asp:Label>
                    </div>
                    <div class="col-xs-6">
                        <asp:DropDownList ID="ddlBillOLAPAccount" runat="server" AutoPostBack="false" Width="350px"></asp:DropDownList>
                    </div>
                </div>
                <div class="row" style="padding-bottom:5px">
                    <div class="col-x-6">
                        <asp:Label runat="server" ID="lblBillOLLineItemDescription" ToolTip="A descriptive text field for the item">Line Item Description</asp:Label>
                    </div>
                    <div class="col-xs-6">
                        <asp:DropDownList ID="ddlBillOLLineItemDescription" runat="server" AutoPostBack="false" Width="350px"></asp:DropDownList>
                    </div>
                </div>
                <div class="row" style="padding-bottom:5px">
                    <div class="col-x-6">
                        <asp:Label runat="server" ID="lblBillOLLineItemAmount" CssClass="text-warning" ToolTip="Mandatory - The TOTAL item for the line item">Line Item Amount</asp:Label>
                    </div>
                    <div class="col-xs-6">
                        <asp:DropDownList ID="ddlBillOLLineItemAmount" runat="server" AutoPostBack="false" Width="350px"></asp:DropDownList>
                    </div>
                </div>
                <div class="row" style="padding-bottom:5px">
                    <div class="col-x-6">
                        <asp:Label runat="server" ID="lblBillOLLineItemRef" CssClass="text-warning" ToolTip="Mandatory - The name of the item purchased">Line Item Ref</asp:Label>
                    </div>
                    <div class="col-xs-6">
                        <asp:DropDownList ID="ddlBillOLLineItemRef" runat="server" AutoPostBack="false" Width="350px"></asp:DropDownList>
                    </div>
                </div>
                <div class="row" style="padding-bottom:5px">
                    <div class="col-x-6">
                        <asp:Label runat="server" ID="lblBillOLLineItemClass" ToolTip="Class for the line item">Line Item Class</asp:Label>
                    </div>
                    <div class="col-xs-6">
                        <asp:DropDownList ID="ddlBillOLLineItemClass" runat="server" AutoPostBack="false" Width="350px"></asp:DropDownList>
                    </div>
                </div>
                <div class="row" style="padding-bottom:5px">
                    <div class="col-x-6">
                        <asp:Label runat="server" ID="lblBillOLLineItemQty" ToolTip="Number of items ordered">Line Item Qty</asp:Label>
                    </div>
                    <div class="col-xs-6">
                        <asp:DropDownList ID="ddlBillOLLineItemQty" runat="server" AutoPostBack="false" Width="350px"></asp:DropDownList>
                    </div>
                </div>
                <div class="row" style="padding-bottom:5px">
                    <div class="col-x-6">
                        <asp:Label runat="server" ID="lblBillOLLineItemUnitPrice" ToolTip="Unit Price of the Item">Line Item Unit Price</asp:Label>
                    </div>
                    <div class="col-xs-6">
                        <asp:DropDownList ID="ddlBillOLLineItemUnitPrice" runat="server" AutoPostBack="false" Width="350px"></asp:DropDownList>
                    </div>
                </div>
                <div class="row" style="padding-bottom:5px">
                    <div class="col-x-6">
                        <asp:Label runat="server" ID="lblBillOLLineItemCustomer" ToolTip="Customer associated with the item purchase">Line Item Customer</asp:Label>
                    </div>
                    <div class="col-xs-6">
                        <asp:DropDownList ID="ddlBillOLLineItemCustomer" runat="server" AutoPostBack="false" Width="350px"></asp:DropDownList>
                    </div>
                </div>
                    </ContentTemplate>
                </asp:UpdatePanel>

            </div>
        </div>

            </ContentTemplate>
        </asp:UpdatePanel>
    </div>
    </div>


</div>

这是我的代码背后：

    protected void lbConBillOLDocNumber_SelectedIndexChanged(object sender, EventArgs e)
    {
         txtConBillOLDocNumber.Text = lbConBillOLDocNumber.SelectedItem.Text;

    }

我需要将列表框中的选定文本值放入TextBox。我知道我得到正确的值因为上面代码中的警报显示正确的值，（但是由于模态关闭，我不知道文本框是否正在更新。）我需要填充所选值的文本框ListBox，我需要模态保持开放。我意识到我可能正在接近这一切，所以任何建议的改进都是值得欢迎的。

Answer 1

您可以使用AJAX UpdatePanel作为下面的示例来删除每次回发刷新整个页面的要求，并允许为您的情况部分渲染特定区域它将是模态体。

HTML

<form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
    <!-- Button trigger modal -->
    <button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal">
        Launch demo modal
    </button>

    <!-- Modal -->
    <div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
        <div class="modal-dialog" role="document">
            <div class="modal-content">
                <div class="modal-header">
                    <h5 class="modal-title" id="exampleModalLabel">Modal title</h5>
                    <button type="button" class="close" data-dismiss="modal" aria-label="Close">
                        <span aria-hidden="true">&times;</span>
                    </button>
                </div>
                <div class="modal-body">
                    <%-- AJAX UpdatePanel section--%>
                    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                        <ContentTemplate>
                            <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
                            </asp:DropDownList>
                            <br />
                            <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
                        </ContentTemplate>
                    </asp:UpdatePanel>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
                    <button type="button" class="btn btn-primary">Save changes</button>
                </div>
            </div>
        </div>
    </div>
</form>

代码背后

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        // Bind DropDownList1 with some testing data
        DropDownList1.Items.Add(new ListItem() { Text = "Item 001", Value = "1" });
        DropDownList1.Items.Add(new ListItem() { Text = "Item 002", Value = "2" });
        DropDownList1.Items.Add(new ListItem() { Text = "Item 003", Value = "3" });
        DropDownList1.Items.Add(new ListItem() { Text = "Item 004", Value = "4" });
        DropDownList1.Items.Add(new ListItem() { Text = "Item 005", Value = "5" });
    }
}

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
    TextBox1.Text = DropDownList1.SelectedValue;
}

Answer 2

最终想出了这个问题。问题是由显示列表框的下拉菜单引起的。只要在列表框中单击任何内容，下拉菜单就会关闭，并且基本上使选择无效并关闭模式。我不得不停止传播下拉列表。一旦我这样做，UpdatePanel就完成了它的工作。我在下拉菜单中添加了一个ID，并使用以下代码阻止它在单击ListBox时关闭。

            $('#myDropdown .dropdown-menu').on({
            "click": function (e) {
                e.stopPropagation();
            }
        });

我希望这有助于其他人。快乐的编码。