Disable all buttons when any Button is clicked in ASP.Net

Hi Sammi,

I have made the sample that full-fill your requirement.

HTML

<div>
    <asp:Button ID="btnsave" runat="server" Style="font-family: 'Segoe UI'; font-size: small"
        Text="Save as Draft" Width="90px" OnClick="btnsave_Click" />
    <asp:Button ID="btncancel" runat="server" Style="font-family: 'Segoe UI'; font-size: small"
        Text="Cancel" Width="90px" OnClick="btncancel_Click" />
    <asp:Button ID="btnsubmit" runat="server" OnClick="btnsubmit_Click" UseSubmitBehavior="true"
        OnClientClick=" if ( Page_ClientValidate() ) { this.disabled = true; this.value='Please wait..';}"
        Style="font-family: 'Segoe UI'; font-size: small" Text="Submit" ValidationGroup="Initiator"
        Width="90px" />
</div>

Code  

private void DisableButton()
{
    btncancel.Enabled = false;
    btnsave.Enabled = false;
    btnsubmit.Enabled = false;
    btnsubmit.Text = "Please wait..";
    btnsave.Text = "Please wait..";
    btncancel.Text = "Please wait..";
}
protected void btncancel_Click(object sender, EventArgs e)
{
    this.DisableButton();
}
protected void btnsave_Click(object sender, EventArgs e)
{
    this.DisableButton();
}
protected void btnsubmit_Click(object sender, EventArgs e)
{
    this.DisableButton();
}

Screenshot