我有一个c#app,它需要创建一个excel应用程序&然后打开一本工作簿。问题是我需要在excel打开时加载Bloomberg addinn。我发现的唯一方法是在这篇文章working example中。
这确实启动了excel并且能够使用Bloomberg功能。但是我想知道是否有办法将myXl转换为xlApp,其中xlApp的类型为Microsoft.Office.Interop.Excel.Application?
CreateProcessAsUser
原因是我有一个库,它有一些我希望使用的有用功能,但它需要一个类型为Microsoft.Office.Interop.Excel.Application的参数。我该怎么做?
答案 0 :(得分:3)
您可以从外部应用程序自动化Excel。有关详细信息,请参阅https://github.com/atom/electron/blob/v0.36.6/docs/faq/electron-faq.md#requireelectronxxx-is-undefined和How to automate Microsoft Excel from Microsoft Visual C#.NET。
Application
类提供了以下用于访问加载项的属性:
AddIns
集合,表示“加载项”对话框中列出的所有加载项(“开发人员”选项卡上的“加载项”命令); XLL加载项。COMAddIns
集合,代表当前安装的COM插件。因此,如果您需要确保启用了COM加载项,则需要使用Application类的ComAddins
属性。
答案 1 :(得分:1)
您可以使用以下代码:
这将启动Excel,然后浏览在运行对象表中注册的所有工作簿,以查找刚刚启动的进程中运行的工作簿。为此,它获取工作簿的窗口句柄的进程ID,并将其与刚刚启动的进程的id进行比较。
查看运行对象表会重复几次,其间会有等待时间,因为Excel在启动后可能需要一些时间来注册ROT。您可能需要在较慢的计算机上增加maxAttempts
和waitTimeMS
。
如果找到了正确的工作簿,则返回该工作簿。在样本中,我将编写" hello world"进入Excel应用程序实例的第一个单元格。
private void button1_Click(object sender, EventArgs e)
{
Microsoft.Office.Interop.Excel.Application excelApplication = StartExcel();
if (excelApplication != null)
{
excelApplication.ActiveCell.Value = "Hello World";
}
}
[DllImport("user32.dll", SetLastError = true)]
static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint processId);
[DllImport("ole32.dll")]
private static extern int GetRunningObjectTable(int reserved, out IRunningObjectTable prot);
private Microsoft.Office.Interop.Excel.Application StartExcel()
{
// Maximum number of attempts to look for started Excel Application
const int maxAttempts = 3;
// Number of milliseconds to wait between attempts to look for started Excel Application
const int waitTimeMS = 200;
Microsoft.Office.Interop.Excel.Application result = null;
// Start Excel
var process = Process.Start("Excel.exe");
process.WaitForInputIdle();
// Try to find started Excel Application
int currentAttempt = 1;
while ((result == null) && (currentAttempt <= maxAttempts))
{
// Wait between attempts
if(currentAttempt != 1)
{
Thread.Sleep(waitTimeMS);
}
// List all running Excel automation objects and find the one with the same process id
IRunningObjectTable lRunningObjectTable = null;
IEnumMoniker lMonikerList = null;
try
{
// Query Running Object Table
if (GetRunningObjectTable(0, out lRunningObjectTable) == 0 && lRunningObjectTable != null)
{
// List Monikers
lRunningObjectTable.EnumRunning(out lMonikerList);
// Start Enumeration
lMonikerList.Reset();
// Array used for enumerating Monikers
IMoniker[] lMonikerContainer = new IMoniker[1];
IntPtr lPointerFetchedMonikers = IntPtr.Zero;
// foreach Moniker
while (lMonikerList.Next(1, lMonikerContainer, lPointerFetchedMonikers) == 0)
{
object lComObject;
lRunningObjectTable.GetObject(lMonikerContainer[0], out lComObject);
// Check the object is an Excel workbook
if (lComObject is Microsoft.Office.Interop.Excel.Workbook)
{
Microsoft.Office.Interop.Excel.Workbook lExcelWorkbook = (Microsoft.Office.Interop.Excel.Workbook)lComObject;
// Get the Process ID for the Window Handle
uint processId;
GetWindowThreadProcessId(new IntPtr(lExcelWorkbook.Application.Hwnd), out processId);
if (processId == process.Id)
{
// Correct automation object found, return Application
result = lExcelWorkbook.Application;
break;
}
}
}
}
}
finally
{
// Release ressources
if (lRunningObjectTable != null) Marshal.ReleaseComObject(lRunningObjectTable);
if (lMonikerList != null) Marshal.ReleaseComObject(lMonikerList);
}
currentAttempt++;
}
return result;
}
答案 2 :(得分:0)
添加对Excel库的引用,而不是var myXL,您可以实例化工作簿对象
Excel.Application myXl = New Excel.Application();
然后您只需手动加载加载项。
foreach (Excel.AddIn item in myXl.AddIns)
{
if (item.Name.Equals("BLOOMBERG ADDIN NAME"))
{
item.Installed = true;
}
}