我正在开发 Outlook-2010 插件。
Main 插件类正在启动一个这样的异步任务并声明一个静态事件以从其他形式订阅：
int ProcesadosArchivado = 0;
public delegate void OnFileArchivedDelegate (int NumFilesArchived, string NameArchived);
public static event OnFileArchivedDelegate OnFileArchivedEvent = delegate { };
private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
Thread hiloArchivado = new Thread(DoArchiveBackground);
hiloArchivado.Start();
}
private void DoArchiveBackground()
{
try
{
Outlook.Application app = null;
Outlook._NameSpace ns = null;
Outlook.MailItem item = null;
//Outlook.MAPIFolder inboxFolder = null;
DateTime MyDateTime = DateTime.Now.AddMonths(-3);
app = new Outlook.Application();
ns = app.GetNamespace("MAPI");
ns.Logon(null, null, false, false);
Outlook.Stores store;
Outlook.MAPIFolder rootFolder = null;
store = Application.Session.Stores;
foreach (Outlook.Store storeClass in store.Session.Stores)
{
rootFolder = storeClass.GetRootFolder();
}
Outlook.MAPIFolder folder = rootFolder.Folders["ARCHIVAR"];
Outlook.MAPIFolder ArchivarFolder = ns.GetDefaultFolder(Microsoft.Office.Interop.Outlook.OlDefaultFolders.olFolderInbox);
// inboxFolder = ns.GetDefaultFolder(Microsoft.Office.Interop.Outlook.OlDefaultFolders.olFolderInbox);
for (int i = 1; i <= ArchivarFolder.Items.Count; i++)
{
try
{
item = (Microsoft.Office.Interop.Outlook.MailItem)ArchivarFolder.Items[i];
ProcesadosArchivado += 1;
OnFileArchivedDelegate myEvent = OnFileArchivedEvent;
myEvent.Invoke(ProcesadosArchivado, item.Subject);
//Messate iteration
}
catch (Exception ex)
{
throw;
}
}
}
//Catch folder iteration
catch (Exception ex)
{
throw;
}
}
然后我从其他表单订阅静态事件并尝试使用 InvokeRequired 和委托更新一些控件：
public partial class ArchiveForm : Form
{
private delegate void UpdateControlDelegate (Control control,string Property,string value);
public ArchiveForm()
{
InitializeComponent();
this.Load += new EventHandler(ArchiveForm_Load);
}
void ArchiveForm_Load(object sender, EventArgs e)
{
ThisAddIn.OnFileArchivedEvent += new ThisAddIn.OnFileArchivedDelegate(ThisAddIn_OnFileArchivedEvent);
}
void ThisAddIn_OnFileArchivedEvent(int NumFilesArchived, string NameArchived)
{
updateControls(NumFilesArchived,NameArchived);
}
void UpdateControl(Control control,string Property,string value)
{
PropertyInfo prop = control.GetType().GetProperty("Text");
prop.SetValue(control,
Convert.ChangeType(value, prop.PropertyType), null);
}
private void updateControls(int NumFilesArchived, string NameArchived)
{
if (lblArchivado.InvokeRequired)
{
UpdateControlDelegate del = new UpdateControlDelegate(UpdateControl);
//del.BeginInvoke(lblArchivado, "Text", "Archivados: " + NumFilesArchived.ToString(), null, null);
del.Invoke(lblArchivado, "Text", "Archivados: " + NumFilesArchived.ToString());
}
else
this.lblArchivado.Text = "Archivados: " + NumFilesArchived.ToString();
if (lblAsunto.InvokeRequired)
{
UpdateControlDelegate del = new UpdateControlDelegate(UpdateControl);
//del.BeginInvoke(lblAsunto, "Text", "Asunto: " + NameArchived, null, null);
del.Invoke(lblAsunto, "Text", "Asunto: " + NameArchived);
}
else
this.lblAsunto.Text = "Asunto: " + NameArchived;
}
}
到达线路时，我得到了 Cross-Head Invalid operation 异常：
* prop.SetValue(control,Convert.ChangeType(value, prop.PropertyType), null); *
它正在通过 invoreRequired 并调用委托，所以我真的不明白为什么我会收到这个异常。