How to maintain the value of label after postback in Asp.net?
asp.net, c#, postback
Solution
The `label` is converted into a `span` element and the html elements, like `span` or `div`, do not have `ViewState`. Neither the text or html of these is sent server side like `form` elements.
Form elements that are posted are the input elements as well as `hidden` fields. ASP.net maintains ViewState using hidden field and input elements.
I am afraid you have to use hidden fields to maintain the value of labels between postbacks.
HTML
<input id="hdnLabelState" type="hidden" runat="server" >
Javascript
document.getElementById('<%= hdnLabelState.ClientID %>').value = "changed value of span";
Server side (code behind)
string changedLabelValue = hdnLabelState.Value;
Problem
In asp.net page I need to know how to maintain the value of a particular label assign by the html button click. After postback done. Detailed code: ``` <table> <tr> <td><asp:Label ID="lbl1" runat="server" ClientIDMode="Static">Before Changing</asp:Label></td> <td><asp:Label id="lbl2" runat="server" ClientIDMode="Static"></asp:Label></td> <td><asp:TextBox ID="txtbox" runat="server"></asp:TextBox></td> </tr> <tr> <td><asp:Button ID="btnasp" runat="server" Text="ASP Button" Height="50px" Width="150px" OnClick="btnasp_Click"/></td> <td><input type="button" id="btnhtml" value="HTML Button" onclick="showlabel()" style="height:50px; width:150px"/></td> </tr> </table> ``` Script ``` <script type="text/javascript"> function showlabel() { $('#lbl1').text("After Changing"); } </script> ``` cs code ``` protected void btnasp_Click(object sender, EventArgs e) { txtbox.Text = lbl1.Text; } ``` OutPut If I click HTML button the label text before changing is change to after changing. Then I click the ASP button after changing value is show in textbox. This is done without adding value in hidden field and not using the server control to html button. How is this possible?