c# - 从另一个工作表中检测依赖单元格

Question

这是说明我的问题的简化示例。
我在单元格 A1 公式中的 sheet1 中有:

sheet1!A1 cell has formula '=sheet2!C1'
sheet2!B1 cell has formula '=C1'

当 sheet2 中的单元格 C1 发生更改时，我想检测所有相关单元格，这意味着 sheet2 中的单元格 B1 和 sheet1 中的单元格 A1。但是 range.Dependents 只返回事件工作表中的单元格。我只得到单元格B1。
在 Range interop API 文档中指出，依赖项将仅返回事件工作表中的范围。
有谁知道如何从所有工作表、其他 API 调用或其他方法中检测所有依赖项？

Answer 1

这将是一个很长的代码示例，但基本上您只需要按照箭头进行操作(我假设您使用的是 C#，因为您没有指定用于互操作的语言)。

下面示例的输出是(Sheet1 上有两个单元格来演示如何遍历所有远程引用):

    Sheet1!A1    Sheet1!A2    Sheet2!B1

Health warning. This sample doesn't do any interop cleanup or app closing - this is for demonstration only

Edit Use Application.ScreenUpdating to prevent screen flicker during the tracing function.

using xl = Microsoft.Office.Interop.Excel;
// use in a console app
class Program
{
    static void Main(string[] args)
    {
        xl.Application app = new xl.Application();
        app.Visible = true;
        xl.Workbook wb = app.Workbooks.Add();
        xl.Worksheet worksheet1 = wb.Sheets[1];
        xl.Worksheet worksheet2 = wb.Sheets[2];
        xl.Range rngS1A1 = worksheet1.Range["A1"];
        xl.Range rngS1A2 = worksheet1.Range["A2"];
        xl.Range rngS2B1 = worksheet2.Range["B1"];
        xl.Range rngS2C1 = worksheet2.Range["C1"];

        rngS1A1.Formula = @"=sheet2!C1";
        rngS1A2.Formula = @"=sheet2!C1";
        ((xl._Worksheet)worksheet2).Activate();
        rngS2B1.Formula = @"=C1";

        List<string> dependentAddresses = ListDependents(rngS2C1);

        foreach (string address in dependentAddresses)
        {
            Console.WriteLine(address);
        }
        Console.WriteLine("done, press enter to exit");
        Console.ReadLine();
    }

    private static List<string> ListDependents(xl.Range sourceRange)
    {
        sourceRange.ShowDependents(false);
        string sourceAddress = sourceRange.Worksheet.Name + "!" + sourceRange.Address;
        int arrowNumber = 1;
        List<string> dependentAddresses = new List<string>();
        do
        {
            string targetAddress = null;
            int linkNumber = 1;
            do
            {
                try
                {
                    xl.Range target = sourceRange.NavigateArrow(TowardPrecedent: false, ArrowNumber: arrowNumber, LinkNumber: linkNumber++);
                    targetAddress = target.Worksheet.Name + "!" + target.Address;

                    if (sourceAddress == targetAddress) break;

                    dependentAddresses.Add(targetAddress);
                }
                catch (COMException cex)
                {
                    if (cex.Message == "NavigateArrow method of Range class failed")
                    {
                        break;
                    }
                    throw;
                } 
            } while (true);
            if (sourceAddress == targetAddress) break;
            arrowNumber++;
        } while (true);

        sourceRange.Worksheet.ClearArrows();
        return dependentAddresses;
    }
}