清除函数中的复选框列表
作者:互联网
我正在尝试在复选框切换后实施“清除所有复选框”.
<div class="form-group" id="divExecutionSchedule">
<label class="control-label col-md-2" id="lblExecutionSchedule">Execution Schedule</label>
<div class="col-md-3">
<div class="input-group">
<asp:CheckboxList ID="ddlExecutionSchedule" ClientIDMode="Static" CssClass="chkLabel" runat="server" AutoPostBack="false" CellPadding="5" CellSpacing="5" RepeatDirection="Horizontal" RepeatLayout="Table" onchange="ToggleExecutionSchedule(this)" >
<asp:ListItem Text="Daily" Value="Daily"></asp:ListItem>
<asp:ListItem Text="Weekly" Value="Weekly"></asp:ListItem>
</asp:CheckboxList>
</div>
</div>
<label class="control-label col-md-2"></label>
<div class="col-md-10">
<div class="alert alert-danger hidden" role="alert" id="executionScheduleError"></div>
</div>
</div>
<div class="form-group" id="divSelectDay" >
<label class="control-label col-md-2" id="lblSelectDay">Select Day of Week</label>
<div class="col-md-3">
<div class="input-group">
<asp:CheckBoxList ID="chkSelectDay" CssClass="chkLabel" ClientIDMode="Static" runat="server" AutoPostBack="false" CellPadding="5" CellSpacing="5" RepeatDirection="Horizontal" RepeatLayout="Table">
<asp:ListItem Value="Monday">Mon</asp:ListItem>
<asp:ListItem Value="Tuesday">Tue</asp:ListItem>
<asp:ListItem Value="Wednesday">Wed</asp:ListItem>
<asp:ListItem Value="Thursday">Thu</asp:ListItem>
<asp:ListItem Value="Friday">Fri</asp:ListItem>
<asp:ListItem Value="Saturday">Sat</asp:ListItem>
<asp:ListItem Value="Sunday">Sun</asp:ListItem>
</asp:CheckBoxList>
</div>
</div>
<label class="control-label col-md-2"></label>
</div>
在同一页面中,我有一个功能,每当选中/取消选中每周复选框时,就会显示/隐藏复选框列表.
它不会清除复选框列表.因此,如果再次选中,将显示先前的选择(星期一,星期二等).
function ToggleExecutionSchedule(controlId) {
var frmControl = document.getElementById(controlId.id);
var divDay = document.getElementById("divSelectDay");
var checkbox = frmControl.getElementsByTagName("input");
var counter = 0;
for (var i = 0; i < checkbox.length; i++) {
if (checkbox[i].checked)
{
if (checkbox[i].value == "Weekly")
divDay.style.display = 'block';
}
else
{
if (checkbox[i].value == "Weekly") {
divDay.style.display = 'none';
//clear divDay/chkSelectDay checkboxlist <===
}
}
}
}
我看到了一些有关使用CheckBoxList1.Items.Clear();的文章,但是我无法在函数中检索复选框列表chkSelectDay的值.
问:取消选中每周复选框时,如何清除复选框列表chkSelectDay?
解决方法:
使用WebForms时,您应该像使用所有框架一样接受框架,而不是与之抗争.这是典型的WebForms方法:
在您的页面上有一个ASP.NET按钮,如下所示:
<asp:Button runat="server" OnClick="ClearButtons" Text="ClearButtons"/>
然后,在服务器端清除您的复选框:
protected void ClearButtons(object sender, EventArgs e)
{
foreach (ListItem item in chkSelectDay.Items)
{
item.Selected = false;
}
}
这会导致按钮单击后发回,并随后重新加载客户端页面.为了避免可见的页面重新加载,您可以将相关的div放入UpdatePanel中,如下所示:
<asp:UpdatePanel runat="server">
<ContentTemplate>
<div class="form-group" id="divSelectDay">
<label class="control-label col-md-2" id="lblSelectDay">Select Day of Week</label>
<div class="col-md-3">
<div class="input-group">
<asp:CheckBoxList ID="chkSelectDay" CssClass="chkLabel" ClientIDMode="Static" runat="server" AutoPostBack="false" CellPadding="5" CellSpacing="5" RepeatDirection="Horizontal" RepeatLayout="Table">
<asp:ListItem Value="Monday" Selected="True">Mon</asp:ListItem>
<asp:ListItem Value="Tuesday">Tue</asp:ListItem>
<asp:ListItem Value="Wednesday">Wed</asp:ListItem>
<asp:ListItem Value="Thursday">Thu</asp:ListItem>
<asp:ListItem Value="Friday">Fri</asp:ListItem>
<asp:ListItem Value="Saturday">Sat</asp:ListItem>
<asp:ListItem Value="Sunday">Sun</asp:ListItem>
</asp:CheckBoxList>
</div>
</div>
<label class="control-label col-md-2"></label>
<asp:Button runat="server" OnClick="ClearButtons" Text="ClearButtons"/>
</div>
</ContentTemplate>
</asp:UpdatePanel>
标签:checkboxlist,webforms,asp-net,c,checkbox 来源: https://codeday.me/bug/20191211/2106096.html