你仅仅须要新建一个SP项目。加入一个feature，加入一个空白元素。编辑它的Elements.xml文件。

<?xml version="1.0" encoding="utf-8"?>
 <Elements xmlns="http://schemas.microsoft.com/sharepoint/">
 
<CustomAction
 Id="{41C23DD2-6FEB-4636-AE4F-41B8E2A2D415}"
<strong> RegistrationId="100"</strong>
<strong> RegistrationType="List"</strong>
 Location="CommandUI.Ribbon"
 Sequence="5"
 Title="Custom Lists Button">
 
<CommandUIExtension>
 <CommandUIDefinitions>
 <CommandUIDefinition Location="Ribbon.List.Settings.Controls._children">
 <Button
 Id="{09A51440-C3A6-4103-874A-383747042E75}"
 Alt="Custom Lists Button"
 Sequence="5"
 Command="{42844423-382B-4e87-BEC4-34B0601DA98F}"
 Image32by32="/_layouts/images/menulistsettings.gif"
 Image16by16="/_layouts/images/itdcl.gif"
 LabelText="Custom Lists Button"
 TemplateAlias="o1" />
 </CommandUIDefinition>
 </CommandUIDefinitions>
 
<CommandUIHandlers>
 <CommandUIHandler
 Command="{42844423-382B-4e87-BEC4-34B0601DA98F}"
 EnabledScript=""
 CommandAction="javascript: alert('Custom Lists Button!');" />
 </CommandUIHandlers>
 
</CommandUIExtension>
 </CustomAction>
</Elements>

原因是RegistrationId="100"。这里100是自己定义列表的类型。

假设要给某个列表实例提供button的话。你能够使用一下方法：

<CustomAction
Id="{67A1EB46-A49B-4aff-B456-068909C39599}"
RegistrationId="10000"
RegistrationType="List"
Location="CommandUI.Ribbon"
Sequence="5"
Title="List Definition Button">

<CommandUIExtension>
 <CommandUIDefinitions>
 <CommandUIDefinition Location="Ribbon.List.Settings.Controls._children">
 <Button
 Id="{3F083F8B-95D6-436b-A130-3EF1E8C04E3C}"
 Alt="List Definition Button"
 Sequence="5"
 Command="{AF90D558-00DA-4ccf-B4F4-169CD9162CD0}"
 Image32by32="/_layouts/images/menulistsettings.gif"
 Image16by16="/_layouts/images/itdcl.gif"
 LabelText="List Definition Button"
 TemplateAlias="o1" />
 </CommandUIDefinition>
 </CommandUIDefinitions>

<CommandUIHandlers>
 <CommandUIHandler
 Command="{AF90D558-00DA-4ccf-B4F4-169CD9162CD0}"
 EnabledScript=""
 CommandAction="javascript: alert('List Definition Button!');" />
 </CommandUIHandlers>

</CommandUIExtension>
 </CustomAction>

public override void FeatureActivated(SPFeatureReceiverProperties properties)
 {
 //Depending from the feature scope - can be SPSite
 var web = properties.Feature.Parent as SPWeb;
 
//Get list instance - here You can also create a new list
 var list = web.Lists.TryGetList("RibbonButtonList");
 
if (list != null)
 {
 //Add new user custom action to the list
 var userAction = list.UserCustomActions.Add();
 //Set action's location
 userAction.Location = "CommandUI.Ribbon";
 //This one is Optional as we are adding the same later
 userAction.ImageUrl = "/_layouts/images/menulistsettings.gif";
 //Command body
 userAction.CommandUIExtension = @"<CommandUIExtension>
 <CommandUIDefinitions>
 <CommandUIDefinition Location=""Ribbon.List.Settings.Controls._children"">
 <Button
 Id=""{5557CC45-324E-41bb-9E88-A535DBF1BF6B}""
 Alt=""Programmatically Added Button""
 Sequence=""5""
 Command=""{234F6E9E-80A3-4f70-9683-02067515801E}""
 Image32by32=""/_layouts/images/menulistsettings.gif""
 Image16by16=""/_layouts/images/itdcl.gif""
 LabelText=""Programmatically Added Button""
 TemplateAlias=""o1"" />
 </CommandUIDefinition>
 </CommandUIDefinitions>
 
<CommandUIHandlers>
 <CommandUIHandler
 Command=""{234F6E9E-80A3-4f70-9683-02067515801E}""
 EnabledScript=""""
 CommandAction=""javascript: alert('Programmatically Added Button!');"" />
 </CommandUIHandlers>
 
</CommandUIExtension>";
 
userAction.Update();
 }
 }