Ajax Update Panel Button click resets All Values

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Hi,

I have created a test asp.net page to check how a button click inside ajax update panel behaves.
I need to update one label at a time, so that I disabled viewstate of both Labels.
But When I click any button, The Other label also reset to the default value "Label"..
How this comes ? I hope the Ajax updates only the needed controls? Isn't it ?

Here is the code

XML

<asp:Panel CssClass="Panel1" ID="Panel1" runat="server">
       <asp:ScriptManager ID="ScriptManager1" runat="server" ></asp:ScriptManager>
        <asp:UpdatePanel ID="UpdatePanel1" runat="server"  >
            <ContentTemplate>
    <asp:Label ID="Label1" runat="server" Text="Label" ViewStateMode="Disabled"></asp:Label>
    <br />
    <br />
    <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Update First" />
    <br />
    <br />
    <asp:Label ID="Label2" runat="server" Text="Label" ViewStateMode="Disabled"></asp:Label>
    <br />
    <br />
    <asp:Button ID="Button2" runat="server" OnClick="Button2_Click" Text="Update Second" />
    <br />
    <br />
</ContentTemplate>
            </asp:UpdatePanel>

</asp:Panel>

C#

protected void Button1_Click(object sender, EventArgs e)
      {
          Label1.Text = DateTime.Now.ToString();
      }

      protected void Button2_Click(object sender, EventArgs e)
      {
          Label2.Text = DateTime.Now.ToString();
      }

Posted 12-Jan-14 4:04am

Yesudasan Moses

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*Suvabrata Roy* · Answer 1 · 2014-01-12T19:26:00

Hi,

When a request come to ASP.Net it will create an object of that type and view state will help framework to set previous values of controls,Now in your case you have disabled view state for each label when button clicked it request to server without the value of both label and then server set respective values (as per your code) to the respective Label.

You have set your label default value to "Label" so other label set to that.

Now how to solve it you can use two different update panel
Or

You can use JQuery to achieve the same Link[^]

Read below mention links you will find your answer:

Life Cycle Of ASP.NET[^]
Ajax Update Panel[^]

Suk@nta · Answer 2 · 2014-01-12T22:22:00

Solution 2

C#

you have to use two update panel, placed one label and one button in each panel.
bcz as u put all together in one updatepanel ,so as per property of update panel it will refresh all the control present inside it.

so try what i have mentioned and let me know

Posted 12-Jan-14 22:22pm

Suk@nta