C#從Excel儲存格中取值結果總是顯示system._comobject

private void button1_Click(object sender, EventArgs e)
  {
  try
  {
  string path;
  path = @"d:\succeccful.xls";
  Excel.Application xlapp;
  Excel.Workbook xlbook;
  Excel.Worksheet xlsheet;
  xlapp = new Excel.ApplicationClass();
  xlbook = xlapp.Workbooks._Open(path,Missing.Value,Missing.Value,Missing.Value,Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);
  xlapp.DisplayAlerts = false;
  xlapp.Cells[2, 2] = "123";

  MessageBox.Show((xlapp.Cells[2, 2]).ToString ());

//上面這句話的結果顯示system._comobject，這個需要進行強制轉換一下，比如下面這句話

MessageBox.Show(((Excel.Range)xlapp.Cells[2, 2]).Value2.ToString());

  xlbook.SaveAs(path, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Excel.XlSaveAsAccessMode.xlExclusive, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);
  xlapp.Quit();
  xlapp = null;
  }
  catch (Exception ex) { MessageBox.Show(ex.Message); }

  }

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這些是從網上找到的http://dotnet.wgets.com/thread/400640

需要強制轉換一下

((Excel.Range)xlapp.Cells[2,2]).Text//（唯讀）

((Excel.Range)xlapp.Cells[2,2]).Value//（讀寫）

((Excel.Range)xlapp.Cells[2,2]).Value2//（讀寫）

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http://dotnet.wgets.com/thread/400640