【发布时间】：2023-02-24 02:43:32
【问题描述】：
I have a custom task pane (ctp) at the top of my VSTO Outlook Add-in. I create it as below:
this.myHostControl = new myHostControl();
this.myCtp = Globals.ThisAddIn.CustomTaskPanes.Add(myHostControl, "My Toolbar");
this.myCtp .DockPosition = Microsoft.Office.Core.MsoCTPDockPosition.msoCTPDockPositionTop;
this.myCtp .DockPositionRestrict = Microsoft.Office.Core.MsoCTPDockPositionRestrict.msoCTPDockPositionRestrictNoChange;
this.myCtp.Height = DEFAULT_CTP_HEIGHT;
this.myCtp.Visible = true;
I am embedding a WPF User Control in the ctp.
The winforms user control, myHostControl, is like below (only showing relevant parts to understand my issue):
public partial class myHostControl: System.Windows.Forms.UserControl
{
private Rectangle? myScreenBounds = null;
public myHostControl()
{
InitializeComponent();
// Gets the current screen bounds for the current screen.
MyScreenBounds = System.Windows.Froms.Screen.FromControl(this).Bounds;
}
public myHostControl(int param1, int param2):this()
{
this.ElementHostCtl.Parent = this;
// Gets the WPF view
this.WpfView = new WpfView();
// Sets wpf view as child of elementhost
this.ElementHostCtl.Child = this.WpfView;
// Sets the datacontext
this.WpfView.DataContext = new WpfViewModel();
}
private Rectangle? MyScreenBounds
{
get => myScreenBounds;
set
{
if (myScreenBounds!= value)
{
myScreenBounds= value;
}
}
}
// More stuff
}
public partial class WpfView : System.Windows.Controls.UserControl
{
public WpfView ()
{
InitializeComponent();
}
// more stuff
}
I have noticed that line below in the constructor:
MyScreenBounds = System.Windows.Froms.Screen.FromControl(this).Bounds;
makes that when I select a message from the message list in the explorer window, it does not load its content (message body) in the preview area, instead it is shown as an empty white area.
If I remove that line from the constructor, then it works, i mean, when i select a message from the messages list in the explorer its content is correctly displayed in the preview area.
Why Screen.FromControl(this).Bounds is causing the content of the messages not being shown in the preview area? If I double click on a message, the inspector window opens and then i can see the message body.
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Have you tried using Windows controls instead of WPF ones? Does Outlook work correctly in that case?
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Are you sure CTP is already displayed by the time you call that code? Does it work if you call it later, e.g., in a timer event handler?
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@DmitryStreblechenko It looks like it was the problem. I was calling that line of code just when creating and just after initializing the WPF user control but before the ctp was visible. Calling the same line of code from another place after the ctp is visible works. For example, i call it on the VisibleChanged event handler of the ctp when ctp is visible. If you want, you can put it as an answer and I will accept it as the correct one.
标签： outlook vsto outlook-addin office-addins customtaskpane