How do I prevent reload visible button and hiding button using asp.ner

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I have some of problem , if i click Button1, and then hide Button1 and Visible Button2 and Button3. it looks working good, but when i click button1, Page reloaded and then scroll up using mobile page.

i will put source code

What I have tried:

aspx code.

<asp:Button id="Button1" runat="server"  class="btn btn-primary btn-lg"  OnClick="Button1_Click" Text="11:00AM" style= "font-family: Arial, Helvetica, sans-serif;" />
<asp:button id="Button2" runat="server" class="btn btn-outline-info"  OnClick="Button2_Click" Text="Confirm"/>
<asp:button id="Button3" runat="server" class="btn btn-outline-info"  OnClick="Button3_Click" Text="11:00AM"/>

protected void Page_Load(object sender, EventArgs e)
{

    Button1.Visible = true;
    Button2.Visible = false;
    Button3.Visible = false;
  }

protected void Button1_Click(object sender, System.EventArgs e)
       {

           Button2.Visible = true;
           Button3.Visible = true;
           Button1.Visible = false;

       }

Posted 2-Jul-20 13:42pm

SangYong Jin

Updated 3-Jul-20 0:13am

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Richard Deeming · Answer 1 · 2020-07-03T00:13:00

If you don't want the page to post back, you'll need to use Javascript to change the visibility of the buttons.

Something like this should work:

Code behind:

C#

protected void Page_Load(object sender, EventArgs e)
{
    // Leave all three buttons visible so they are rendered to the HTML output
}

Markup:

ASPX

<asp:Button id="Button1" runat="server"  class="btn btn-primary btn-lg"  OnClientClick="button1Click(); return false;" Text="11:00AM" style= "font-family: Arial, Helvetica, sans-serif;" />
<asp:button id="Button2" runat="server" class="btn btn-outline-info d-none"  OnClick="Button2_Click" Text="Confirm"/>
<asp:button id="Button3" runat="server" class="btn btn-outline-info d-none"  OnClick="Button3_Click" Text="11:00AM"/>

Javascript:

JavaScript

function button1Click(){
    $(this).addClass("d-none");
    $("button[id$='Button2'], button[id$='Button3']").removeClass("d-none");
}