我使用 VSCT 文件中的此设置为 Visual Studio 2015 的 VSIX 包中的工具栏定义了一个动态组合:
<Combo guid="cmdExplorerToolbarSearchGUID" id="cmdExplorerToolbarSearchID" priority="0x0" type="DynamicCombo"
defaultWidth="50" idCommandList="cmdExplorerToolbarSearchGetListID">
<Parent guid="grpExplorerToolbar3GUID" id="grpExplorerToolbar3ID" />
<CommandFlag>DynamicVisibility</CommandFlag>
<CommandFlag>IconAndText</CommandFlag>
<CommandFlag>StretchHorizontally</CommandFlag>
<Strings>
<CanonicalName>cmdExplorerToolbarSearch</CanonicalName>
<ButtonText>Search</ButtonText>
<ToolTipText>Search elements in the model explorer</ToolTipText>
</Strings>
</Combo>
</Combos>
对应的DynamicStatusMenuCommand
实例定义如下:
command = new DynamicStatusMenuCommand(
new EventHandler(this.OnPopUpMenuDisplayAction),
new EventHandler(this.OnCmdExplorerToolbarSearchSelected),
new CommandID(CmdExplorerToolbarSearchGUID, CmdExplorerToolbarSearchID));
commands.Add(command);
command = new DynamicStatusMenuCommand(
new EventHandler(this.OnPopUpMenuDisplayAction),
new EventHandler(this.OnCmdExplorerToolbarSearchGetList),
new CommandID(CmdExplorerToolbarSearchGUID, CmdExplorerToolbarSearchGetListID));
commands.Add(command);
最后是OnCmdExplorerToolbarSearchSelected
这样的事件处理程序:
private void OnCmdExplorerToolbarSearchSelected(object sender, EventArgs e)
{
// Process the event arguments
OleMenuCmdEventArgs args = e as OleMenuCmdEventArgs;
if (args != null)
{
// Process values
string inValue = args.InValue as string;
IntPtr outValue = args.OutValue;
if (outValue != IntPtr.Zero)
{
// When outValue is not null, the IDE is requesting the current value for the combo
Marshal.GetNativeVariantForObject(this.SearchHandler.CurrentValue, outValue);
}
else if (inValue != null)
{
this.SearchHandler.Search(this.PresentationModel3ExplorerToolWindow.Explorer, inValue);
}
}
}
这会在工具箱中产生一个很好的组合:
问题是,例如,如果用户输入“Unit”并按下Enter
事件处理程序,则使用 inValue != null 调用事件处理程序并执行搜索。但是,如果随后他输入其他内容(例如:Customer)并按下Tab
(否Enter
),则组合将恢复为先前的值(“Unit”),因为使用 args.OutValue != IntPtr.Zero 调用处理程序。
当用户输入某些内容并将焦点从组合移开而不按 时,获得回调的技巧是什么Enter
?而且,鉴于此,我如何才能获得当时组合的价值?