我开发自定义文件上传器。
<asp:FileUpload runat="server" ID="fuUpload" />
<asp:UpdatePanel runat="server" >
<ContentTemplate>
<asp:Button ID="btnUpload" runat="server" Text="Upload" CausesValidation="false"
OnClick="btnUpload_Click" />
<div>
<asp:Label ID="lblError" runat="server" Visible="false" ForeColor="Red" /></div>
<asp:Repeater ID="rptAttachments" runat="server" OnItemCommand="Uploader_ItemCommand">
<ItemTemplate>
<div>
<a href='<%#GetUrl(....) %>'><%#Eval("Filename") %></a> <b>
<asp:LinkButton ID="lnkDelete" runat="server" Text="Удалить" CommandName="DeleteAttachment" CommandArgument='<%#Eval("FileName") %>' /></b>
</div>
</ItemTemplate>
</asp:Repeater>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnUpload" EventName="Click" />
<asp:AsyncPostBackTrigger ControlID="rptAttachments" EventName="ItemCommand" />
</Triggers>
</asp:UpdatePanel>
protected void btnUpload_Click(object sender, EventArgs e)
{
//fuUpload.HasFile == false
if (fuUpload.HasFile && fuUpload.PostedFile != null
&& fuUpload.PostedFile.ContentLength > 0)
{
}
}
我想知道为什么fuUpload.HasFile
始终等于null
。
答案 0 :(得分:2)
尝试这些事情。
<asp:FileUpload runat="server" ID="fuUpload" />
置于 UpdatePanel
btnUpload
触发器。 <asp:PostBackTrigger ControlID="btnUpload" />