I am using a `<asp:FileUpload>` to upload a PDF file to my web page. But after clicking on browse the window opens, and once I select a file and click on `Open` i want to get the file name and display it in a `Label`. What function should I use in `ASP.NET` to do this? I tried the `OnLoad`, `OnUnload`, `OnDataBinding`, etc. in the `<asp:FileUpload>` but nothing works. Can someone suggest me a solution for this?

My code is as below:

```
<asp:FileUpload ID="fileUpload" runat="server" /><br />
<asp:Label ID="labelFilename" runat="server" Text=""></asp:Label>

```

Once I select a file and click open the file name should be displayed in the label.