javascript - CRM 2011 Ribbon 自定义按钮可见性控制

Question

我正在尝试根据表单的子网格值启用和禁用自定义功能区按钮。我创建了一个简单的 Java 脚本方法作为 Web 资源，并使用工作台在启用规则中调用它。下面是我的代码：

function DisableSendInvitationRibbonButton()
{ 
   alert('test');
   var gridControl = document.getElementById("Attendees").control;

   if (gridControl.readyState != "complete") 
   {  alert('readyState not Complete');
      // delay one second and try again.  
      setTimeout(DisableSendInvitationRibbonButton, 100);
      return;
   }
   else
   {  alert('readyState Complete');
      var ids = gridControl.get_allRecordIds();
      alert(ids.length);
   }
}

代码只是点击警报“测试”，看起来子网格没有加载。任何帮助，将不胜感激。

谢谢 ！

Answer 1

很可能你有一些你没有控制的空变量尝试下面的代码来看看问题出在哪里

function DisableSendInvitationRibbonButton()
{ 
   alert('test');
   var myGrid = document.getElementById("Attendees");
   if(myGrid == null) {
       alert('myGrid is null');
       return;
   }
   var gridControl = myGrid.control;
   if(gridControl == null) {
       alert('gridControl is null');
       return;
   }
   if (gridControl.readyState != "complete") 
   {  alert('readyState not Complete');
      // delay one second and try again.  
      setTimeout(DisableSendInvitationRibbonButton, 100);
      return;
   }
   else
   {  alert('readyState Complete');
      var ids = gridControl.get_allRecordIds();
      alert(ids.length);
   }
}

Answer 2

感谢大家的回复，我能够解决这个问题，我注意到的主要事情是您必须在更改事件上调用 Grid 并将所有逻辑放在那里。以下是我更新的代码：

function ShareMOM() 
{

    var subGridId = "ActionItems";

    var grid = document.getElementById(subGridId);

    if( grid != null)
      {
        var val = ReadSelectedSubGridRecords();
        return val;
      }
     else
      {
        return false;
      }
}


function ReadSelectedSubGridRecords()
 {
     if (document.getElementById('ActionItems'))
     {
         var grid = document.getElementById('ActionItems').control;
         var ids = grid.get_allRecords();

         if (ids.length > 0)
               {
                 return true;
               }  
          else
               {
                  return false;
                }

      }
}