我已经创建了一个用户控件（Windows窗体应用程序）来获取Word的实例（活动或新的），并提供一个按钮，使用文件对话框选择器将文档打开到该实例中。
表单包含2个按钮，1个用于获取单词实例，另一个用于打开文档。它还包含一个用于显示打开文档的列表框，以及一个openfiledialog控件，用于提供选择要打开的文档的方法。
我正在处理Application.DocumentOpen事件以填充列表框......
m_wordApp.DocumentOpen += new msoWord.ApplicationEvents4_DocumentOpenEventHandler(m_wordApp_DocumentOpen);
我确定何时需要重新调用填充列表框的方法，以确保对控件的访问位于创建它的同一个线程上....
private void AddDocument(string name)
{
try
{
if (m_documentsListBox.InvokeRequired && m_documentsListBox.IsHandleCreated&&!m_documentsListBox.IsDisposed)
{
this.Invoke(m_AddDocument, new object[] { name });
return;
}
if (!m_documentsListBox.Items.Contains(name))
m_documentsListBox.Items.Add(name);
}
catch (Exception ex)
{
}
}
我没有使用2个点，我相信我正确地释放任何COM对象。
为什么应用程序会挂起打开文档的代码行...
WordDoc = m_wordDocs.Open(ref fileName);
或重新调用AddDocument（）方法的行......
this.Invoke(m_AddDocument, new object[] { name });
以下完整代码......
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
// use these for the core office & word references
using msoWord = Microsoft.Office.Interop.Word;
namespace MCDevNET.Office.Word.TestUIControls
{
public partial class OpenWordDocument : Form
{
public OpenWordDocument()
{
InitializeComponent();
m_openWordButton.Click += new EventHandler(buttonOpenWordApp_Click);
m_openDocumentButton.Click += new EventHandler(buttonOpenDocument_Click);
m_AddDocument = new UpdateListControl(AddDocument);
}
#region Form: control eventHandlers
void buttonOpenWordApp_Click(object sender, EventArgs e)
{
try
{
if (!IsValid(m_wordApp))
WordApp = GetInstance();
AddAllDocuments();
}
catch (Exception ex)
{
}
}
void buttonOpenDocument_Click(object sender, EventArgs e)
{
OpenWordDoc();
}
public delegate void UpdateListControl(string name);
private UpdateListControl m_AddDocument;
private void AddDocument(string name)
{
try
{
if (m_documentsListBox.InvokeRequired && m_documentsListBox.IsHandleCreated&&!m_documentsListBox.IsDisposed)
{
this.Invoke(m_AddDocument, new object[] { name });
return;
}
if (!m_documentsListBox.Items.Contains(name))
m_documentsListBox.Items.Add(name);
}
catch (Exception ex)
{
}
}
private void AddAllDocuments()
{
try
{
m_documentsListBox.Items.Clear();
if (m_wordDocs != null)
{
for (int i = 1; i <= m_wordDocs.Count; i++)
AddDocument(m_wordDocs[i].Name);
}
}
catch (Exception ex)
{
}
}
#endregion
#region Word: properties & eventhandlers
private msoWord.Document m_wordDoc;
public msoWord.Document WordDoc
{
get { return m_wordDoc; }
private set
{
try
{
if (m_wordDoc != value)
{
ReleaseCOMObject(m_wordDoc);
m_wordDoc = value;
}
}
catch (Exception ex)
{
}
}
}
private msoWord.Documents m_wordDocs;
public msoWord.Documents WordDocs
{
get { return m_wordDocs; }
private set
{
try
{
if (m_wordDocs != value)
{
ReleaseCOMObject(m_wordDocs);
m_wordDocs = value;
}
}
catch (Exception ex)
{
}
}
}
private msoWord.Application m_wordApp;
public msoWord.Application WordApp
{
get { return m_wordApp; }
set
{
try
{
if (m_wordApp != value)
{
if (m_wordApp != null)
{
m_wordApp.DocumentOpen -= new msoWord.ApplicationEvents4_DocumentOpenEventHandler(m_wordApp_DocumentOpen);
ReleaseCOMObject(m_wordApp);
}
m_wordApp = value;
if (IsValid(m_wordApp))
{
m_wordApp.DocumentOpen += new msoWord.ApplicationEvents4_DocumentOpenEventHandler(m_wordApp_DocumentOpen);
WordDocs = m_wordApp.Documents;
}
}
}
catch (Exception ex)
{
}
}
}
void m_wordApp_DocumentOpen(msoWord.Document doc)
{
try
{
string name = doc.Name;
AddDocument(name);
}
catch (Exception ex)
{
}
finally
{
ReleaseCOMObject(doc);
doc = null;
}
}
private msoWord.Application GetInstance()
{
msoWord.Application app = null;
try
{
app = (msoWord.Application)Marshal.GetActiveObject("Word.Application");
}
catch (Exception ex)
{
if (app == null)
app = new msoWord.Application();
}
finally
{
if (IsValid(app))
{
app.Visible = true;
app.Activate();
}
}
return app;
}
private void OpenWordDoc()
{
try
{
m_openFileDialog.AddExtension = true;
m_openFileDialog.Filter = "All Word (*.docx; *.docm; *.doc; *.dotx; *.dotm; *.dot)|*.docx;*.docm;*.doc;*.dotx;*.dotm;*.dot|Word Documents (*.docx)|*.docx|Word Macro-Enabled Documents (*.docm)|*.docm|Word 97-2003 Documents (*.doc)|*.doc|All Word Templates (*.dotx; *.dotm; *.dot)|*.dotx;*.dotm;*.dot|Word Templates (*.dotx)|*.dotx|Word Macro-Enabled Templates (*.dotm)|*.dotm)";
m_openFileDialog.FilterIndex = 1;
m_openFileDialog.Multiselect = false;
m_openFileDialog.Title = "Open Word Document";
if (m_openFileDialog.ShowDialog() == DialogResult.OK)
{
object fileName = m_openFileDialog.FileName;
WordDoc = m_wordDocs.Open(ref fileName);
}
}
catch (Exception ex)
{
}
}
private bool IsValid(msoWord.Application app)
{
try
{
if (app != null)
{
string name = app.Caption;
return true;
}
}
catch (Exception ex)
{
}
return false;
}
#endregion
private void ReleaseCOMObject(object comObject)
{
try
{
GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
GC.WaitForPendingFinalizers();
if (comObject != null && Marshal.IsComObject(comObject))
Marshal.ReleaseComObject(comObject);
}
catch (Exception ex)
{
}
}
}
}
namespace MCDevNET.Office.Word.TestUIControls
{
partial class OpenWordDocument
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.m_documentsListBox = new System.Windows.Forms.ListBox();
this.m_openDocumentButton = new System.Windows.Forms.Button();
this.m_openWordButton = new System.Windows.Forms.Button();
this.m_openFileDialog = new System.Windows.Forms.OpenFileDialog();
this.SuspendLayout();
//
// lb_Documents
//
this.m_documentsListBox.FormattingEnabled = true;
this.m_documentsListBox.Location = new System.Drawing.Point(12, 41);
this.m_documentsListBox.Name = "lb_Documents";
this.m_documentsListBox.Size = new System.Drawing.Size(156, 134);
this.m_documentsListBox.TabIndex = 8;
//
// m_openDocumentButton
//
this.m_openDocumentButton.Location = new System.Drawing.Point(93, 12);
this.m_openDocumentButton.Name = "m_openDocumentButton";
this.m_openDocumentButton.Size = new System.Drawing.Size(75, 23);
this.m_openDocumentButton.TabIndex = 7;
this.m_openDocumentButton.Text = "Doc";
this.m_openDocumentButton.UseVisualStyleBackColor = true;
//
// m_openWordButton
//
this.m_openWordButton.Location = new System.Drawing.Point(12, 12);
this.m_openWordButton.Name = "m_openWordButton";
this.m_openWordButton.Size = new System.Drawing.Size(75, 23);
this.m_openWordButton.TabIndex = 6;
this.m_openWordButton.Text = "Word";
this.m_openWordButton.UseVisualStyleBackColor = true;
//
// m_openFileDialog
//
this.m_openFileDialog.FileName = "openFileDialog1";
//
// OpenWordDocument
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(182, 184);
this.Controls.Add(this.m_documentsListBox);
this.Controls.Add(this.m_openDocumentButton);
this.Controls.Add(this.m_openWordButton);
this.Name = "OpenWordDocument";
this.Text = "OpenWordDocument";
this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.ListBox m_documentsListBox;
private System.Windows.Forms.Button m_openDocumentButton;
private System.Windows.Forms.Button m_openWordButton;
private System.Windows.Forms.OpenFileDialog m_openFileDialog;
}
}
答案 0 :(得分：1)
挂断发生在对Documents.Open(fileName)
您为Application.DocumentOpen事件连接了一个事件处理程序。在删除此事件处理程序时，不再发生挂起。
我认为问题的原因是你在Documents.Open调用返回之前尝试触发该事件时遇到了死锁。这意味着处理事件的线程仍然很忙。
更换
WordDoc = m_wordDocs.Open(ref fileName)
带
new System.Threading.Tasks.Task(() => WordDoc = m_wordDocs.Open(ref fileName))
.Start();
在另一个线程上打开文档似乎可以解决问题。