private void LoadByActiveXInstance()
{
SHDocVw.WebBrowser wb = (SHDocVw.WebBrowser)this.webBrowser1.ActiveXInstance;
eDocument = wb.Document;
eApplication = (Excel.Application)eDocument.GetType().InvokeMember("Application", BindingFlags.GetProperty, null, eDocument, null);

//添加工具条
eWorkbook = eApplication.ActiveWorkbook; wb.ExecWB(SHDocVw.OLECMDID.OLECMDID_HIDETOOLBARS, SHDocVw.OLECMDEXECOPT.OLECMDEXECOPT_DONTPROMPTUSER);
}

private Office.CommandBar m_StandardCommandBar = null;
/// <summary>
/// 获取Application方式二
/// 添加工具条方式二
/// </summary>
private void LoadByAPI()
{
// Creation of the workbook object
if ((eWorkbook = RetrieveWorkbook(FileName)) == null) return;

// Create the Excel.Application
eApplication = eWorkbook.Application;
// Creation of the standard toolbar
m_StandardCommandBar = eApplication.CommandBars["Standard"];
m_StandardCommandBar.Position = Office.MsoBarPosition.msoBarTop;
m_StandardCommandBar.Visible = true;
//foreach (Office.CommandBar bar in eApplication.CommandBars)

// Enable the OpenFile and New buttons
foreach (Office.CommandBarControl control in m_StandardCommandBar.Controls)
{
string name = control.get_accName(Missing.Value);
if (name.Equals("Open")) ((Office.CommandBarButton)control).Enabled = false;
if (name.Equals("Save")) ((Office.CommandBarButton)control).Enabled = false;
}
}

///此方法为COM提供的方法。可google：COM原理及应用 命名和绑定技术
///另所有 OLE api 和接口的目的，参见：http://support.microsoft.com/kb/126157/zh-cn
[DllImport("ole32.dll")]
static extern int GetRunningObjectTable(uint reserved, out IRunningObjectTable pprot);
[DllImport("ole32.dll")]
static extern int CreateBindCtx(uint reserved, out IBindCtx pctx);

public Excel.Workbook RetrieveWorkbook(string xlfile)
{
IRunningObjectTable prot = null;
IEnumMoniker pmonkenum = null;
try
{
IntPtr pfetched = IntPtr.Zero;
// Query the running object table (ROT)
if (GetRunningObjectTable(0, out prot) != 0 || prot == null) return null;
prot.EnumRunning(out pmonkenum);
pmonkenum.Reset();
IMoniker[] monikers = new IMoniker[1];
while (pmonkenum.Next(1, monikers, pfetched) == 0)
{
IBindCtx pctx;
string filepathname;
CreateBindCtx(0, out pctx);
// Get the name of the file
monikers[0].GetDisplayName(pctx, null, out filepathname);
// Clean up
Marshal.ReleaseComObject(pctx);
// Search for the workbook
// filepathname = @"file:///D:/fly/Book1.xls"
// xlfile = @"D:\fly\Book1.xls"
if (filepathname.IndexOf(xlfile) != -1)
{
object roval;
// Get a handle on the workbook
prot.GetObject(monikers[0], out roval);
return roval as Excel.Workbook;
}
}
}
finally
{
// Clean up
if (prot != null) Marshal.ReleaseComObject(prot);
if (pmonkenum != null) Marshal.ReleaseComObject(pmonkenum);
}
return null;
}