Handle multiple Button Click events in ASP.Net Update Panel

Hi smile,

Refer below sample. Add PostBackTrigger for each Button.

HTML

<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
    <ContentTemplate>
        <asp:Button ID="btnAdd" Text="Add" runat="server" OnClick="Add" />
        <asp:Button ID="btnUpdate" Text="Update" runat="server" OnClick="Update" />
        <asp:Button ID="btnDelete" Text="Delete" runat="server" OnClick="Delete" />
    </ContentTemplate>
    <Triggers>
        <asp:PostBackTrigger ControlID="btnAdd" />
        <asp:PostBackTrigger ControlID="btnUpdate" />
        <asp:PostBackTrigger ControlID="btnDelete" />
    </Triggers>
</asp:UpdatePanel>

Code

protected void Add(object sender, EventArgs e)
{
    ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('Add clicked.');", true);
}

protected void Update(object sender, EventArgs e)
{
    ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('Update clicked.');", true);
}

protected void Delete(object sender, EventArgs e)
{
    ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('Delete clicked.');", true);
}

Screenshot