sharepoint 2013 添加ribbon并单选可用

如果仅仅是添加一个Ribbon菜单的话，那么网上一搜一大把。比如霖雨童鞋的博客http://www.cnblogs.com/jianyus/archive/2013/05/04/3059022.html

但是很多情况是需要控制这个菜单是否可用的。比如我单选的时候才可用，不选或者多选的时候，不可用，这个很少有说的。还是自己来吧。

假设大家都已经参照霖雨童鞋的博客完成了如下代码

<?xml version="1.0" encoding="utf-8"?>

<Elements xmlns="http://schemas.microsoft.com/sharepoint/">

<CustomAction Id="Ribbon.CustomGroup" RegistrationId="101" RegistrationType="List" Title="MyCustomerRibbon" Location="CommandUI.Ribbon">

<CommandUIExtension>

<CommandUIDefinitions>

<CommandUIDefinition Location="Ribbon.Documents.New.Controls._children">

<Button Id="Ribbon.Documents.New.Baidu"

Command="Baidu"

Image32by32="/_layouts/images/test/du.png"

LabelText="百度首页"

TemplateAlias="o1" />

</CommandUIDefinition>

</CommandUIDefinitions>

<CommandUIHandlers>

<CommandUIHandler

Command="Baidu"

CommandAction="javascript:window.open ('http://www.baidu.com') ;" />

</CommandUIHandlers>

</CommandUIExtension>

</CustomAction>

</Elements>

这里，我们要在<CommandUIHandler Command="Baidu" CommandAction="javascript:window.open ('http://www.baidu.com') ;" />

</CommandUIHandlers>这个节点加一个EnabledScript属性，并且写一些脚本。完善之后的脚本是这个样子的

 1 <?xml version="1.0" encoding="utf-8"?>
 2 
 3 <Elements xmlns="http://schemas.microsoft.com/sharepoint/">
 4 
 5 <CustomAction Id="Ribbon.CustomGroup" RegistrationId="101" RegistrationType="List" Title="MyCustomerRibbon" Location="CommandUI.Ribbon">
 6 
 7 <CommandUIExtension>
 8 
 9 <CommandUIDefinitions>
10 
11 <CommandUIDefinition Location="Ribbon.Documents.New.Controls._children">
12 
13 <Button Id="Ribbon.Documents.New.Baidu"
14 
15 Command="Baidu"
16 
17 Image32by32="/_layouts/images/test/du.png"
18 
19 LabelText="百度首页"
20 
21 TemplateAlias="o1" />
22 
23 </CommandUIDefinition>
24 
25 </CommandUIDefinitions>
26 
27 <CommandUIHandlers>
28 
29 <CommandUIHandler
30 
31 Command="Baidu"
32 
33 CommandAction="javascript:window.open ('http://www.baidu.com') ;"
34 
35  EnabledScript="javascript:      
36             function EnableDisableButton() {
37                 var enabled = false; 
38                 var selectedItems = SP.ListOperation.Selection.getSelectedItems();
39 
40                 if (CountDictionary(selectedItems) == 1) {
41                     if (this.itemId != selectedItems[0]['id']) {
42                         this.itemId = selectedItems[0]['id'];
43                         GetItemStatus(this.itemId);
44                     }                                      
45                     else if (this.StatusValue == false) {  
46                         enabled = false;
47                     }  
48                     else if ((this.StatusValue == true) &amp;&amp; (this.itemId == selectedItems[0]['id'])) {
49                         enabled = true;
50                     }
51                 }
52                 else { 
53                     enabled = false;
54                 }
55 
56                 return enabled;
57             }
58 
59             function GetItemStatus(itemId) {
60                 var _clientContext = SP.ClientContext.get_current();
61                 var _web = _clientContext.get_web();
62                 var _currentList = _web.get_lists().getById(SP.ListOperation.Selection.getSelectedList());              
63                 this.singleItem = _currentList.getItemById(itemId);
64                 _clientContext.load(this.singleItem, 'ContentType');
65 
66                 _clientContext.executeQueryAsync(Function.createDelegate(this, onQuerySucceeded), Function.createDelegate(this, onQueryFailed));
67             }
68 
69             function onQuerySucceeded(sender, args) {
70 71                 this.StatusValue = true ; 
72                 
73         RefreshCommandUI();                
74         
75         }
76 
77             function onQueryFailed(sender, args) {
78                 alert('Request Failed ' + args.get_message() + '\n' + args.get_stackTrace());
79             }
80 
81             EnableDisableButton();
82              " />
83 
84 </CommandUIHandlers>
85 
86 </CommandUIExtension>
87 
88 </CustomAction>
89 
90 </Elements>

这个新添加的这段代码我是参照C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\15\TEMPLATE\FEATURES\PPSRibbon\elements.xml来的，做了一下修改。至于为什么要这么修改，我不想多说了，自己去研究吧，现在已经凌晨两点半，我想静静。

转载于:https://www.cnblogs.com/Percy/p/4733519.html