我有以下gridview和“loadingbar”div:
<asp:GridView ID="importLogGV"
AutoGenerateColumns="false"
DataKeyNames="id"
OnRowDeleting="DeleteStuff"
runat="server"
CssClass="searchListGridView">
<Columns>
<asp:BoundField HeaderText="ID" DataField="id">
[...]
<asp:TemplateField ItemStyle-Width="120">
<ItemTemplate>
<asp:LinkButton ID="lnkDel" CommandName="Delete" Text='Delete' runat="server"
OnClientClick="return confirm('Really delete?');" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<div id="deleting" style="text-align: center" Visible="False" runat="server"
ClientIDMode="Static">Delete in progress...<br />
<asp:Image runat="server" ID="Image1" ImageUrl="~/Images/ajax-loadingbar.gif"/>
</div>
虽然在后面的代码中运行事件处理程序“DeleteStuff”(它可以执行大量数据库操作,但最多可能需要10秒),但我需要显示“删除”div,并且当事件处理程序完成时需要再次隐藏div
这是我在codebehind中删除的事件处理程序:
protected void DeleteStuff(object sender, GridViewDeleteEventArgs e)
{
deleting.Visible = true;
System.Threading.Thread.Sleep(5000);
deleting.Visible = false;
}
我尝试使用style:display而不是visible属性,我尝试使用asp:panel而不是div,但无论我做什么,eventhandler都会运行,但div在运行时从不显示。< / p>
我想在用户点击删除按钮时用javascript显示div,但是在DeleteStuff过程完成后我怎么能再次隐藏它?
答案 0 :(得分:2)
每当您单击要删除的按钮时,都会向服务器发送提交请求,并且您的页面将开始刷新。在服务器上的方法完成执行后,将重新呈现该页面。所以无论你在方法中做什么,最后的效果都将保留。如果你想在浏览器上显示繁忙的文字,那就是ajax;你将不得不使用更新面板。试试这个:
javascript:
<script type="text/javascript">
function showDeleteConfirm()
{
var isSure = confirm('Really delete?');
if(isSure)
{
document.getElementById("deleting").style['display'] = 'block';
}
}
</script>
aspx标记:
<asp:UpdatePanel id="up1" runat="server">
<ContentTemplate>
<asp:GridView ID="importLogGV"
AutoGenerateColumns="false"
DataKeyNames="id"
OnRowDeleting="DeleteStuff"
runat="server"
CssClass="searchListGridView">
<Columns>
<asp:BoundField HeaderText="ID" DataField="id">
[...]
<asp:TemplateField ItemStyle-Width="120">
<ItemTemplate>
<asp:LinkButton ID="lnkDel" CommandName="Delete" Text='Delete' runat="server"
OnClientClick="return showDeleteConfirm();" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<div id="deleting" style="text-align: center" style="display:none" runat="server"
ClientIDMode="Static">Delete in progress...<br />
<asp:Image runat="server" ID="Image1" ImageUrl="~/Images/ajax-loadingbar.gif"/>
</div>
</ContentTemplate>
</asp:UpdatePanel>
代码背后:
protected void DeleteStuff(object sender, GridViewDeleteEventArgs e)
{
//... Real task here
System.Threading.Thread.Sleep(5000);
deleteing.Style['display'] = 'none';
}
顺便说一句,您需要在页面上添加ScriptManager
。
答案 1 :(得分:0)
你试过了吗?
protected void DeleteStuff(object sender, GridViewDeleteEventArgs e)
{
if (CheckAccess())
{
deleting.Visible = true;
System.Threading.Thread.Sleep(5000);
deleting.Visible = false;
}
else
{
Dispatcher.BeginInvoke((Action) (() => DeleteStuff(sender, e)));
}
}
不过,你应该使用Timer而不是Thread.Sleep(5000)。