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Editorial Team
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Asked: 2026-06-09T21:34:50+00:00

I am using SmtpClient ‘s Send method in ASP.NET to send email from a

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I am using SmtpClient‘s Send method in ASP.NET to send email from a contact-us page. While the message is being sent, I want to show a loading image. More specifically, when a user presses the send button to send the email, the loading image will appear, and once the message is sent, the loading image will disappear. I know I can use onclick method to display the loading image. But how can I remove this image once the message is sent?

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1 Answer

  1. Editorial Team

    Encapsulate your button in an update panel.

    You can use the updateprogress template to show a loading sign then.

    <asp:updatepanel id="MailUpdatePanel" runat="server">    
<contenttemplate>


<asp:updateprogress id="UpdateProgress1" runat="server" associatedupdatepanelid="MailUpdatePanel" dynamiclayout="true">
      <progresstemplate>
            <img src="images/loading.gif">
        </progresstemplate>
 </asp:updateprogress>
<asp:Button ID="SendMail" runat="server" OnClick="SendMail_Click" Text="Mail" />
</contenttemplate>
</asp:updatepanel>

    If you are new to update panels take a look at this introduction to update panels

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