In ASP.NET, the TextBox text is not transferred back to the server when the TextBox is disabled. If you want the TextBox to post back the text, you can add a readonly attribute to the TextBox in the code behind.
protected void Page_Load(object sender, EventArgs e)
{
TB1.Attributes.Add("readonly", "readonly");
}
You could also add some style to the TextBox so it appears disabled:
.disabled
{
color:#ACA899;
}
<asp:textbox id="TB1" Runat="server" CssClass="disabled"></asp:textbox>
