avoid page refresh when checkbox selected and submit button clicked in ASP.Net c#

Hi Ranjit

1] Remove Autopostback="true" property from Check Box it won't refresh Page when you will
checked the Checkbox.

2] Use Update Panel. put Checkbox,Button in Content Template and Put Below Line for making
page partially post back.

<asp:scriptmanager id="ScriptManager1" runat="server" xmlns:asp="#unknown">

<asp:updatepanel id="UpdatePanel1" runat="server" xmlns:asp="#unknown">
<contenttemplate>
<asp:checkbox id="CheckBox1" runat="server">
<asp:button id="Button1" runat="server" text="Button">

<triggers> <asp:asyncpostbacktrigger controlid="Button1">

Hi Ranjit

1] Remove Autopostback="true" property from Check Box it won't refresh Page when you will
checked the Checkbox.

2] Use Update Panel. put Checkbox,Button in Content Template and Put Below Line for making
page partially post back.

<asp:scriptmanager id="ScriptManager1" runat="server" xmlns:asp="#unknown">

<asp:updatepanel id="UpdatePanel1" runat="server" xmlns:asp="#unknown">
<contenttemplate>
<asp:checkbox id="CheckBox1" runat="server">
<asp:button id="Button1" runat="server" text="Button">

<triggers> <asp:asyncpostbacktrigger controlid="Button1">

I think you should use Update Panel.Here is the code for UpdatePanel..
You should include your button and all checkbox inside it.

<asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>

            <asp:UpdatePanel ID="UpdatePanel1" runat="server">

                <ContentTemplate>

                    <asp:Label ID="Label" runat="server" Text="Label"></asp:Label>

                    <br/>

                    <asp:Button ID="Button" runat="server" onclick="Button_Click" Text="Update"/>

                </ContentTemplate>

            </asp:UpdatePanel>

the above solution is almost correct but you need to set AutoPostBack="false" for avoide the postback when you check checkbox.

just check the autopost property of checkbox.....keep it true.....no need to do any thing

You have two option for that

1) Set AutoPostBack="False"

if you want AutoPostBack="True"

then,

2) Use UpdatePanel...

<asp:scriptmanager id=""ScriptManager1"" runat=""server"><br" mode="hold" xmlns:asp="#unknown" />        </asp:ScriptManager>

            <asp:UpdatePanel ID="UpdatePanel1" runat="server">

                <ContentTemplate>

                  Put checkbox here...


                </ContentTemplate>

            </asp:UpdatePanel>