范围返回一组错误的单元格

Question

我正在使用 Excel 互操作，并试图返回与我从工作表中获得的第一个单元格范围相关的单元格范围。问题是范围的第二次获取它没有给我预期的单元格。代码如下：

Range cells = xlWorkSheet.Range[
    xlWorkSheet.Cells[5, 5],
    xlWorkSheet.Cells[9, 9]
];

Range cells2 = cells.Range[cells[2, 2], cells[3, 3]];

在第二个 Range 调用中，我期望将 Cells 从 [6, 6] 到 [7, 7] （相对于工作表）。相反，我将 [10, 10] 变为 [11, 11]。

如果我单独得到一个单元格，我会得到预期的单元格：

Range c1 = cells.Cells[2, 2];

这将返回 [6, 6] 单元格。关于我为什么会出现这种行为的任何想法？

Answer 1

这里解释了为什么你没有得到你需要的结果。

enum ColorConstants 
{
    vbYellow = 65535,
    vbRed = 255
}

Excel.Application excel = new Excel.Application
{ 
    Visible = true, 
    WindowState = Excel.XlWindowState.xlMaximized 
};
Excel.Workbook book = excel.Workbooks.Add();
Excel.Worksheet sheet = book.Sheets[1] as Excel.Worksheet;

// We have initial range "E5:I9"
Excel.Range cells = sheet.Range[sheet.Cells[5, 5], sheet.Cells[9, 9]];
cells.Interior.Color = ColorConstants.vbYellow; //Color the range

// Now your goal is to get range "F6:G7" (relative to the sheet),
// which is range "B2:C2" (relative to "cells" range)

// Let's dissect why this isn't the result you need

// You try to achieve your goal with this code:
Excel.Range cells2 = cells.Range[cells.Cells[2, 2], cells.Cells[3, 3]];
cells2.Interior.Color = ColorConstants.vbRed;

// However, the result is incorrect:
// it gives you "J10:K11" range:
string addr = cells2.Address[0, 0]; //=> J10:K11

// Let's see why this happens.
// The thing is that the cell, returned by Cells,
// is relative to SHEET - and not to YOUR RANGE.

// Start cell (top-left): its address is "F6"
Excel.Range cell_start = cells.Cells[2, 2];

// End cell (bottom-rigth): its address is "G7"
Excel.Range cell_end = cells.Cells[3, 3];

// So, we have "F6:G7" address.
// Now we must imagine that our initial range "E5:I9" - and namely "E5" - is the start cell of the sheet.
// When you do it, our "F6:G7" relatively to "E5:I9" will be "J10:K11",
// because "F6:G7" goes OUTSIDE the boundaries of "E5:I9".
// If you calculate correctly, it will be our incorrect "J10:K11" range.
// This is why you get incorrect result.

// To calculate the offset correctly,
// you must imagine your range as a small worksheet.
// For instance, for our range "E5:I9":
// • "E5" (statrt cell) can be referred to as:
//    1) cells.Cells[1]
//    2) cells.Cells[1, 1]
//    2) cells.Cells[1, "A"]
//    3) cells.Cells["A1"]
// • "F6" (end cell) can be referred to as:
//    1) cells.Cells[7]
//    2) cells.Cells[2, 2]
//    3) cells.Cells[2, "B"]
//    4) cells.Range["B2"]

// Thus, we need another approach:
cells2 = cells.Range["B2"].Resize[2, 2];
cells2 = cells.Cells[2, 2].Resize[2, 2];
cells2 = cells.Range["B2:C3"];
cells2.Interior.Color = ColorConstants.vbRed; //Color the range

Answer 2

是的，在您的情况下，cells.Parent 是 xlWorkSheet 对象。

为了完整起见，请注意，您可以使用以下任何一种方法，您将获得与您希望看到的相同的成功结果：

Range cells2 = cells.Parent.Range[cells.Cells[2, 2], cells.Cells[3, 3]];

或

Range cells2 = xlWorkSheet.Range[cells.Cells[2, 2], cells.Cells[3, 3]];

或

Range cells2 = cells.Range[xlWorkSheet.Cells[2, 2], xlWorkSheet.Cells[3, 3]];