我正在使用带有 C# 的 Visual Studio 2010。
我有一个问题,在我的一个 ascx 页面上,我创建了一个这样的复选框列:
<asp:TemplateField ItemStyle-HorizontalAlign="left" HeaderStyle-HorizontalAlign="Left" HeaderText="Beetald">
<HeaderTemplate>
<input type="checkbox" id="selectallTeachers" class="selectallTeachers" onclick="javasctipt:SelectheaderCheckboxesTeacher();" />
</HeaderTemplate>
<ItemTemplate>
<input type="checkbox" id="chkPaid" class="caseTeacher" name="caseTeacher" runat="server" />
</ItemTemplate>
</asp:TemplateField>
我创建了这样的javascript:
<script type="text/javascript">
// Select/Deselect checkboxes based on header checkbox
function SelectheaderCheckboxesTeacher() {
if ($("#selectallTeachers").val() == 'on') {
$('.caseTeacher').attr('checked', 'checked');
$("#selectallTeachers").val('off');
}
else if ($("#selectallTeachers").val() == 'off') {
$('.caseTeacher').removeAttr("checked");
$("#selectallTeachers").val('on');
}
$(".caseTeacher").click(function () {
if ($(".caseTeacher").length == $(".caseTeacher:checked").length) {
$("#selectallTeachers").attr("checked", "checked");
$("#selectallTeachers").val('off');
} else {
$("#selectallTeachers").removeAttr("checked");
$("#selectallTeachers").val('on');
}
});
}
// if all checkbox are selected, check the selectallTeachers checkbox
// and viceversa
</script>
对于一个buttonclick事件,我写了这个:
protected void btnDeleteSelectedMessages_Click(object sender, EventArgs e)
{
if (currentGridView == null)
setCurrentGridView();
//controleer voor elke rij welke checkbox is geselecteerd
foreach (GridViewRow row in currentGridView.Rows)
{
CheckBox cb = (CheckBox)row.FindControl("chkPaid");
Guid messageID = (Guid)currentGridView.DataKeys[row.DataItemIndex].Value;
//als de checkbox is geselecteerd het bericht verwijderen
if (cb != null && cb.Checked)
{
if (currentGridView.ID.Equals("Messages"))
b.BussinesMessageReceiver.DeleteMessageReceiver(messageID, MessageBoxPerson);
else if (currentGridView.ID.Equals("MessagesSent"))
b.BussinesMessage.DeleteMessageSender(messageID);
else //MessagesDeleted
b.BussinesMessage.DeleteMessage(messageID, (Page.Server.MapPath("~/Upload/") + messageID));
continue;
}
}
btnDeleteSelectedMessages.Enabled = false;
selectLocation.Visible = false;
clearSelectedMessageSession();
//Update the GridView
BindGridView();
}
它显示在线错误
CheckBox cb = (CheckBox)row.FindControl("chkPaid");
因为我是通过输入类型而不是直接通过复选框创建的。