Question

I have next code,

<form id="form1" runat="server">
<asp:Label runat="server" ID="Label1" EnableViewState="false" />
<asp:CheckBox runat="server" ID="Check1" EnableViewState="false" Checked="false" />
<asp:Button runat="server" ID="Button1" Text="Button1" />
</form>

protected void Page_Load(object sender, EventArgs e)
{
    if (IsPostBack) return;

    Label1.Text = "Label value";
    Check1.Checked = true;
}

Why on postback text is despairing but check box still checked ?
Thanks

Answer 1

Citing references from this MSDN article – Understanding ASP.NET View State by Scott Mitchell doc:

Page Life cycle Stage 3 – Load Postback Data

It is a common misconception among developers that view state is
somehow responsible for having TextBoxes, CheckBoxes, DropDownLists,
and other Web controls remember their values across postback. This is
not the case, as the values are identified via posted back form field
values, and assigned in the LoadPostData() method for those controls
that implement IPostBackDataHandler.