学步园

CSS脚步：

<style type= "text/css" >
   .x-selectable, .x-selectable * {
         -moz-user-select: text !important;
        -khtml-user-select: text !important;
        -webkit-user-select: text !important; }
   .x-unselectable{
        -moz-user-select:text!important;
        -khtml-user-select:text!important;
        -webkit-user-select:text!important;}
</style>
 

js脚步:

<script type="text/javascript">
        var template = '<div class="x-selectable">{0}</div>';        
        var copyFn = function (value) {
            return Ext.String.format(template, value);
        }
</script> 

要复制的列：
 <ext:TextField ID="txt_InvoiceCode" LabelAlign="Right" FieldLabel="发票号码"  Flex="1" runat="server" Text="" >
    <Renderer Fn="copyFn"></Renderer>
</ext:TextField>