Hello Everyone,


I wanted to keep a counter for the page, which will increment or decrement based on button clicks.

These buttons are kept in UpdatePanel so not page refresh happens.

I decided to use viewstate variable as counter, I am initializing that variable to 0 for the first call.

but I found that for every click I have to initialize the viewstate variable as it is not maintained across Ajax request calls,.

Is there any workaround for this?



Thanks in advance,

S.Balasubramanian..

Following works just fine for me...



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

<asp:UpdatePanel ID="UpdatePAnel1" runat="server">
<ContentTemplate>
<asp:Label ID="lblClickCount" runat="server" Text="0" />

<asp:Button ID="Button1" Text="Add counter" runat="server" OnClick="Button1_Click" />
</ContentTemplate>
</asp:UpdatePanel>



Protected Sub Button1_Click(Object sender , System.EventArg e)
{
int cnt= 0;
if( ViewState["ClickCount"] != null)
{
cnt = ViewState["ClickCount"];
}

cnt += 1;
lblClickCount.Text = cnt.ToString();
ViewState["ClickCount"] = cnt

}

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