c# - 使用 excel.interop 替换 excel 中的单元格值

Question

我想扫描 Excel 工作表，并将所有出现的社会安全号码替换为零...如果可能的话，我想使用 Excel.Interop 来执行此操作，但此时我对任何事情都持开放态度。 ..这是我的一些代码...过去几个月我一直在用头敲 table ...

 // Get range and convert it to a string variable             Excel.Range _range =(Excel.Range)_excelApp.get_Range("A1:K1",Type.Missing);            // convert the value of our cells in our range            // to the string variable            string myString = _range.Cells.Value2.ToString();                      // match any SSN e.g. 1236780909, 123-33-2445            if (Regex.IsMatch(myString, @"\b\d{3}\b\d{2}\b\d{4}"));            {                                _range.Cells.Value2 = replaceSSN;            }            // save our workbook with a new name and create a backup            _excelWorkbook.SaveAs("Results.xls", Type.Missing, Type.Missing, Type.Missing, Type.Missing, true, Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);            // close workbook            _excelWorkbook.Close(false, Type.Missing, Type.Missing);            // send quit signal to app            _excelApp.Quit();            // report success                        MessageBox.Show("File masked successfully.", "Mask Data", MessageBoxButtons.OK);            // release memory            //System.Runtime.InteropServices.Marshal.ReleaseComObject(_excelApp);            // change label back to being blank            lblActivity.Text = "";        }      

Answer 1

问题就在这里

        string myString = _range.Cells.Value2.ToString();          

这里

        // match any SSN e.g. 1236780909, 123-33-2445
        if (Regex.IsMatch(myString, @"\b\d{3}\b\d{2}\b\d{4}"));
        {                
            _range.Cells.Value2 = replaceSSN;
        }

我认为您误解了 Value2 是什么，它是您在上面定义的范围的数组表示。

Excel.Range _range =(Excel.Range)_excelApp.get_Range("A1:K1",Type.Missing);

Range 类的 Value2 属性，返回值数组。您需要做的可能是声明一个空数组并获取范围的 Value2，循环数组中的每个项目并运行正则表达式，如果找到匹配项则替换数组中的项目。然后您可以将数组设置回范围的 Value2，这将更新单元格值。

编辑:请在下面找到一些示例代码

                var excelApp = new Application();
                excelApp.Workbooks.Open("c:\\Test.xls",Type.Missing,Type.Missing,
                                                       Type.Missing,Type.Missing,
                                                       Type.Missing,Type.Missing,
                                                       Type.Missing,Type.Missing,
                                                       Type.Missing,Type.Missing,
                                                       Type.Missing,Type.Missing,
                                                       Type.Missing,Type.Missing);
                var ws = excelApp.Worksheets;
                var worksheet =(Worksheet) ws.get_Item("Sheet1");
                Range range = worksheet.UsedRange;
                // In the following cases Value2 returns different types
                // 1. the range variable points to a single cell
                // Value2 returns a object
                // 2. the range variable points to many cells
                // Value2 returns object[,]

                object[,] values = (object[,])range.Value2;

                for (int row = 1; row <= values.GetUpperBound(0); row++)
                    for (int col = 1; col <= values.GetUpperBound(1); col++)
                {
                    string value = Convert.ToString(values[row, col]);
                    //Also used a different regex, found yours not to match on your given criteria
                    if (Regex.IsMatch(value, @"^\d{3}-\d{2}-\d{4}$"))
                    {
                        range.Cells.set_Item(row,col,"0");
                    }
                }

            excelApp.Save("C:\\Out.xls");
            excelApp.Quit();

            Marshal.ReleaseComObject(worksheet);
            Marshal.ReleaseComObject(ws);
            Marshal.ReleaseComObject(excelApp);