從另一個線程更新Excel電子表格

Question

我已經使用C＃創建了COM服務器，我的客戶端可以接收實時更新。 通常從不同的線程發起更新。 但我注意到，當回調方法更新電子表格時，Excel崩潰。 有什麼方法可以在UI線程中調用更新嗎？

P.S.我知道Excel的RTD功能。但它不適合我的需要，因爲我需要一個更新中的幾個參數。

Answer 1

你正在尋找的是對你的UI線程ISyncronizedInvoke

的調用/ BeginInvoke方法，採取隨心所欲的控制，並保持該基準...

從想要觸發一個更新的線程，調用調用或BeginInvoke上控制（控制實現ISyncronizedInvoke）與要在UI線程上執行委託......從代表你可以叫你的COM服務器

//編輯：示例代碼

using System; 
using System.Windows.Forms; 
using System.Threading; 
using Microsoft.Office.Interop.Excel; 
using System.Runtime.InteropServices; 

namespace WindowsFormsApplication1 
{ 
    public partial class Form1 : Form 
    { 
     Thread someWorkerThread; 

     Microsoft.Office.Interop.Excel.Application ExApp; 
     Worksheet wrkSheet; 

     public Form1() 
     { 
      InitializeComponent(); 

      ExApp = new Microsoft.Office.Interop.Excel.Application(); 

      ExApp.Visible = true; // or else we won't see the window 

      var books = ExApp.Workbooks; 
      var wrkBook = books.Add(); 
      var sheets = wrkBook.Worksheets; 
      wrkSheet = sheets.get_Item(1); 

      Marshal.ReleaseComObject(sheets); 
      Marshal.ReleaseComObject(wrkBook); 
      Marshal.ReleaseComObject(books); 

      someWorkerThread = new Thread(new ParameterizedThreadStart(threadHandler)); 
      someWorkerThread.Start(this); 
     } 

     private void threadHandler(object obj) 
     {// this will be executed on a seperate worker thread 
      Control mainFrm = obj as Control; 
      if (mainFrm == null) 
       throw new ArgumentException("Need to have a Control as parameter"); 
      for (int i = 1; i < 50;i++) 
      { 
       Thread.Sleep(2500); 
       mainFrm.Invoke(new Action<int>(doStuff), i); // this will invoke the main UI thread 
      } 
     } 

     private void doStuff(int i) 
     {// this will be executed on the main UI thread 
      var range = wrkSheet.Range[string.Format("A{0}", i)]; 
      range.Value = "Hello World!"; 
      Marshal.ReleaseComObject(range); 
     } 


     #region designer stuff 
     /// <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.label1 = new System.Windows.Forms.Label(); 
      this.SuspendLayout(); 
      // 
      // label1 
      // 
      this.label1.AutoSize = true; 
      this.label1.Location = new System.Drawing.Point(76, 84); 
      this.label1.Name = "label1"; 
      this.label1.Size = new System.Drawing.Size(149, 13); 
      this.label1.TabIndex = 0; 
      this.label1.Text = "I am an ordinary windows form"; 
      // 
      // Form1 
      // 
      this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); 
      this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; 
      this.ClientSize = new System.Drawing.Size(284, 262); 
      this.Controls.Add(this.label1); 
      this.Name = "Form1"; 
      this.Text = "Form1"; 
      this.ResumeLayout(false); 
      this.PerformLayout(); 

     } 

     #endregion 

     private System.Windows.Forms.Label label1; 

     #endregion 
    } 
} 

被告知：這個例子不清理wrkSheet參考和ExApp參考......你有退出應用程序之前將他們釋放