我希望你编码好, 我正在处理一个图像上传模块,该模块位于模态弹出窗口中,因此包含在更新面板中,
<asp:UpdatePanel runat="server" ID="UpdateModelPopup" UpdateMode="Conditional" ChildrenAsTriggers="true">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="lnkUploadImage" EventName="Click" />
</Triggers>
<ContentTemplate>
<asp:Panel runat="server" ID="pnlModel" CssClass="ModalWindow">
<!-- Style="display: none;" -->
<table border="0" class="modalTable" cellspacing="5">
<tr>
<td>
Keywords 2<strong><font color="#FF0000">*</font></strong> <i>(Seperated by , )</i>
<br />
<asp:TextBox runat="server" ID="txtKeywordsTwo"></asp:TextBox><br />
</td>
<td>
Dimensions <strong><font color="#FF0000">*</font></strong>
<br />
Width :
<asp:TextBox ID="txtDimWidth" runat="server" Width="50px"></asp:TextBox>
Height :
<asp:TextBox ID="txtDimHeight" runat="server" Width="50px"></asp:TextBox>
</td>
<tr>
<td colspan="2">
<hr />
</td>
</tr>
<tr>
<td>
Browse .psd file<br />
<ajaxToolkit:AsyncFileUpload runat="server" ID="pdfFile" Width="200px" OnUploadedComplete="pdfFile_UploadedComplete"
CompleteBackColor="" ErrorBackColor="" OnClientUploadComplete="Success" />
<asp:Image runat="server" ID="imgThumbNail" /><br />
<font color="#FF0000">or</font><br />
Refrence URL<br />
<asp:TextBox ID="TextBox11" runat="server"></asp:TextBox>
</td>
<td>
Browse file <i>(.jpeg, .gif or .png)</i><strong><font color="#FF0000">*</font></strong><br />
<ajaxToolkit:AsyncFileUpload runat="server" ID="AsyncFileUpload1" Width="200px" />
</td>
</tr>
</table>
<asp:Button runat="server" ID="btnUpload" Text="Upload" CssClass="btn" OnClick="btnUpload_Click" />
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
现在根据业务需求,我需要显示用户上传的图像的缩略图,对于.psd文件,我有一个标准图标,我在运行时显示,在我后面的代码中我将文件扩展名验证为.psd文件,然后显示psd图标,我正在尝试设置ImageURL
protected void pdfFile_UploadedComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e)
{
if (Path.GetExtension(e.FileName).ToString().ToLower() != ".psd")
{
string alertMsg = @"alert('Please provide .PSD type file');";
ScriptManager.RegisterStartupScript(this, this.GetType(), "Test", alertMsg, true);
//pdfFile
}
else
{
imgThumbNail.ImageUrl ="~/images/psdIcon.jpg";
}
}
问题是Panel在运行时没有得到更新,即使页面源显示src =&#34;&#34;。我怀疑它是一个更新小组问题。
请指出我正确的方向。
提前致谢
答案 0 :(得分:0)
FileUpload
无法完成Asynchronously
。为了做到这一点PostBackTrigger
需要上传触发器。