Disable button and show loading message while user clicked in asp.net c# USING UpdatePanel

After the ScriptManager put follow script on the page
 
<script type="text/javascript">
var pbControl = null;
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_beginRequest(BeginRequestHandler);
prm.add_endRequest(EndRequestHandler);
function BeginRequestHandler(sender, args) {
pbControl = args.get_postBackElement(); //the control causing the postback
pbControl.disabled = true;
}
function EndRequestHandler(sender, args) {
pbControl.disabled = false;
pbControl = null;
}
</script>

Ref1, Ref2

How to switch or add or move listbox item to another listbox items using javascript in asp.net C#

I believe, most of the developers will encounter the situation that in two list boxes, we like move listbox item to another listbox.
There is no issue if we are using C#. But, as we've known, there could be better if we can use javascript and it can reduce roundtrips (server-client) for every single time in clicking move button.
It is lightweight and user friendly. I have added one more good function that user can order the list as their own.
Below is the complete javascript.

<script type="text/javascript" language="javascript">
        function listbox_move(listID, direction) {
 
            var listbox = document.getElementById('<%= d.ClientID %>');
            var selIndex = listbox.selectedIndex;

            if (-1 == selIndex) {
                alert("Please select an option to move.");
                return;
            }

            var increment = -1;
            if (direction == 'up')
                increment = -1;
            else
                increment = 1;

            if ((selIndex + increment) < 0 ||
                (selIndex + increment) > (listbox.options.length - 1)) {
                return;
            }

            var selValue = listbox.options[selIndex].value;
            var selText = listbox.options[selIndex].text;
            listbox.options[selIndex].value = listbox.options[selIndex + increment].value
            listbox.options[selIndex].text = listbox.options[selIndex + increment].text

            listbox.options[selIndex + increment].value = selValue;
            listbox.options[selIndex + increment].text = selText;

            listbox.selectedIndex = selIndex + increment;
        }

        function listbox_moveacross(SwapDirection) {
            if (SwapDirection == 'add') {
                var src = document.getElementById('<%= s.ClientID %>');
                var dest = document.getElementById('<%= d.ClientID %>');
            }
            else {
                var src = document.getElementById('<%= d.ClientID %>');
                var dest = document.getElementById('<%= s.ClientID %>');
            }
            for (var count = 0; count < src.options.length; count++) {

                if (src.options[count].selected == true) {
                    var option = src.options[count];

                    var newOption = document.createElement("option");
                    newOption.value = option.value;
                    newOption.text = option.text;
                    newOption.selected = true;
                    try {
                        dest.add(newOption, null); //Standard
                        src.remove(count, null);
                    } catch (error) {
                        dest.add(newOption); // IE only
                        src.remove(count);
                    }
                    count--;

                }

            }

        }
        function listbox_selectall(listID, isSelect) {

            var listbox = document.getElementById(listID);
            for (var count = 0; count < listbox.options.length; count++) {

                listbox.options[count].selected = isSelect;

            }
        }
        function GetSubscribed() {
       
            var listbox = document.getElementById('<%= lbxCustomer.ClientID %>');
            var selIndex = listbox.selectedIndex;

            if (-1 == selIndex) {
                alert("Please select one of the Customers.");
                return false;
            }

            var listbox = document.getElementById('<%= d.ClientID %>');
            var allvalue = '';
            for (var count = 0; count < listbox.options.length; count++) {

                allvalue += ',' + listbox.options[count].value;

            }

            var hiddenControl = '<%= hfSub.ClientID %>';
            document.getElementById(hiddenControl).value = allvalue;
        }
</script>

 In aspx file




You will see that there is a subscribe button because after user move list items, server side code cannot detect the items moved. So I put hidden fields and populate it in OnClientClick.
Then you need to values from Hidden field.
That's it.
Enjoy programming.

Disable button and show loading message while user clicked in asp.net c# NOT USING UpdatePanel

 HTML
<form id="form1" runat="server"> 
        <asp:Button ID="Button1" runat="server" Text="Button" />
</form>

Codebehind
protected void Page_Load(object sender, System.EventArgs e) 
{
        Button1.Attributes.Add("onclick", (ClientScript.GetPostBackEventReference(Button1, "") + ";this.value=\'Loading...\';this.disabled = true;"));
}

class Default_ : System.Web.UI.Page 
{

protected void Button1_Click(object sender, System.EventArgs e) 
{
        System.Threading.Thread.Sleep(555);
          //Some additional logic here
          ** Without Masterpage **
        ClientScript.RegisterClientScriptBlock( this.GetType(), "reset", 
          ("document.getElementById(\'" + (Button1.ClientID + "\').disabled=false;")), true);

          ** With Masterpage **
        ScriptManager.RegisterClientScriptBlock(this,true.GetType(), "reset", 
         ("document.getElementById(\'" + (Button1.ClientID + "\').disabled=false;")), true);
}


}
NOTE : This will not work if you are using UpdatePanel. If you are using UpdatePanel, see here.
Ref: 

Rendering ContentPlaceHolder control inside MasterPage in Windows Server 2012 and IIS 8

Today, I would like to share you all something that I found while I was trying to deploy my website to Windows Server 2012 and IIS 8.

Generally, we've already known that inside master page, the control of contentplaceholder will be generated as ctl00_ContentPlaceHolder1_ButtonID

But in IIS8, it will be generated as ContentPlaceHolder1_ButtonID

NOTE : The safer way to get the client id is <%= ButtonID.ClientID %>

More about Client ID
http://msdn.microsoft.com/en-us/library/system.web.ui.control.clientid.aspx
http://msdn.microsoft.com/en-us/library/1d04y8ss.aspx
http://www.dotnetcurry.com/ShowArticle.aspx?ID=273