FileUpload状态指示器ASP.Net C＃

Question

There are other similar posts, but they all want a progress bar. I don't care.

I will probably end up buying Ajax Uploader, but I would like to know if there is a way to just let the user know if a file is in the process of being uploaded. I have tried an Ajax ProgressIndicator but it doesn't work...The file upload part works, but the progresscontent does not get displayed.

Here is what I have without the Ajax:

<asp:FileUpload onchange="clickTheButton();" ID="FileUpload1" runat="server" />
<asp:Button ForeColor="#ffffff" BackColor="#ffffff" BorderColor="#ffffff" BorderWidth="0"
                ID="Button1" runat="server" Text="Add Image" OnClick="AddImage_Click" />

Just a file upload control and a button that uploads the file.

All I need is a way to let the user know that it is busy sending the file.

Answer 1

Why not just create some hidden element on the page like this:

<div id="loadingDiv" style="display: none;">Please wait, uploading file...</div>

and then in the OnClientClick of your upload button, return a function like so:

function displayWaitingMessage(){
    document.getElementById('loadingDiv').style.display = 'block';
    return true;
}

Should display the message and then proceed with the postback to upload the file.

Answer 2

只需使用Ajax以合理的间隔查询服务器，看看您尝试上传的文件是否存在，并根据响应显示适当的指示。