如何使用 C# Interop return 整数数组？

Question

我正在尝试 return 一个整数数组，但无法让它工作...

下面是我的代码，在 return array

上有以下错误

Cannot implicitly convert type 'int[]' to 'int'

  public int getIndexes(int num) 
    {
        var wb = (Excel.Workbook)Globals.ThisAddIn.Application.ActiveWorkbook;
        var wsEvars = wb.Sheets["Evars"];


        Excel.Worksheet sheet = null;
        if (num == 0) sheet = wsEvars;

        if (num != 2)
        {
            var rng = (Excel.Range)sheet.Range[sheet.Cells[3, 2], sheet.Cells[3, 27]];
            var wsValues = rng.Cells.Value;
            int scopeIndex = 0;
            int methodIndex = 0;
            int delimiterIndex = 0;
            int formatIndex = 0;
            int count = 0;

            foreach (var head in wsValues)
            {
                if (head == "*Scope")
                    scopeIndex = count + 1;
                if (head == "Set Method")
                    methodIndex = count + 1;
                if (head == "Delimiter")
                    delimiterIndex = count + 1;
                if (head == "Format")
                    formatIndex = count + 1;
            }
            int[] array = new int[]{scopeIndex, methodIndex, delimiterIndex, formatIndex};
            return array;
        }
    }

Answer 1

问题是您的方法是 returning int 而不是您想要的 int[]。此外，你在 if 块内执行 return，这并不能确保 return 会被命中，因为只有条件为真时才会发生。如果条件为假怎么办？在这种情况下，您没有 returning 任何东西。将 return 移出块：

public int[] getIndexes(int num) 
{
    int[] array = null;
    var wb = (Excel.Workbook)Globals.ThisAddIn.Application.ActiveWorkbook;
    var wsEvars = wb.Sheets["Evars"];


    Excel.Worksheet sheet = null;
    if (num == 0) sheet = wsEvars;

    if (num != 2)
    {
        var rng = (Excel.Range)sheet.Range[sheet.Cells[3, 2], sheet.Cells[3, 27]];
        var wsValues = rng.Cells.Value;
        int scopeIndex = 0;
        int methodIndex = 0;
        int delimiterIndex = 0;
        int formatIndex = 0;
        int count = 0;

        foreach (var head in wsValues)
        {
            if (head == "*Scope")
                scopeIndex = count + 1;
            if (head == "Set Method")
                methodIndex = count + 1;
            if (head == "Delimiter")
                delimiterIndex = count + 1;
            if (head == "Format")
                formatIndex = count + 1;
        }
        array = new int[]{scopeIndex, methodIndex, delimiterIndex, formatIndex};
    }
    return array;
}

如何使用 C# Interop return 整数数组？

How to return an array of integers using C# Interop?

c#

arrays

interop