Hi,
Please refer below code.
HTML
<div>
<asp:Image ID="UserImage" runat="server" Width="140px" ImageUrl="~/images/default.png" /><br />
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="btnUpload" runat="server" Text="Upload" CausesValidation="false"
OnClick="btnUpload_Click" />
</div>
Code
protected void btnUpload_Click(object sender, EventArgs e)
{
string file = string.Empty;
if (FileUpload1.HasFile)
{
file = Path.GetFileName(FileUpload1.PostedFile.FileName);
}
else
{
file = UserImage.ImageUrl;
}
}
I hope this will help you out.