JQuery set text value is lost after postback

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                  甜味超标        
                
              
                            
                2021-01-22 10:08
              
            
            
                                                                       
I think that the problem could be related to the EnableViewState property for your asp.net button; It has to be 'true' for the value to be passed into the postback handler.

I've done a little test on my side and I'm able to reproduce your problem if EnableViewState is 'false'; It works if I set it to 'true'.

I hope it helps,

Roger
                                                                        
                                                        
            
            
              
                
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                  孤街浪徒        
                
              
                            
                2021-01-22 10:09
              
            
            
                                                                       
Use A HiddenField To Get The value after postback

Try This

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="../js/jquery/jquery-1.4.1.min.js" type="text/javascript"></script>
<script>
function btnSetText_OnClientClick() {
$("#<%= lbl1.ClientID %>").text("123");
$('#HiddenFileldVariable').val($("#<%= lbl1.ClientID %>").text());
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="lbl1" runat="server"></asp:Label>
<asp:Button ID="btnSetText" runat="server" Text="Set Text" OnClientClick="btnSetText_OnClientClick(); return false;" />
<asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClick="btnSubmit_Click" />
 <asp:HiddenField ID="HiddenFileldVariable" runat="server" />
</div>
</form>
</body>
</html>

protected void Page_Load(object sender, EventArgs e)
{

}

protected void btnSubmit_Click(object sender, EventArgs e)
{
      string str1 = HiddenFileldVariable.Value;
}

                                                                        
                                                        
            
            
              
                
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