Question

我能够正确打开并读取excel文件，但输出不会停止。当有空单元格时它会继续运行。如果程序到达没有数据的单元格，如何使程序停止？

我已经阅读了其他帖子并尝试了this帖子，因为解决方案有点类似。代码有什么问题？

感谢您的帮助

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Runtime.InteropServices; 
using System.Text; 
using System.Threading.Tasks; 
using Excel = Microsoft.Office.Interop.Excel;

namespace ConsoleApplication1 {
    class Program
    {
        private static int colCount;
        private static int rowCount;

        static void Main(string[] args)
        {
            Excel.Application xlApp = new Excel.Application();
            Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(@"C:\Users\msehgal\Desktop\AR Aging Oct2016.xlsx");
            Excel._Worksheet xlWorksheet = xlWorkbook.Sheets[1];
            Excel.Range xlRange = xlWorksheet.UsedRange;


            int rowCount = xlWorksheet.Rows.Count;
            int colCount = xlWorksheet.Columns.Count;

            for (int i = 1; i <= rowCount; i++)
            {
                for (int j = 1; j <= colCount; j++)
                {
                    //new line
                    if (j == 1)
                    {
                        Console.Write("\r\n"); 

                    }

                    //write the value to the console
                    if (xlWorksheet.Cells[i, j].Value2 != null)
                    {
                        Console.Write(xlRange.Cells[i, j].Value2.ToString() + "\t");
                    }
                }
            }

            //cleanup
            GC.Collect();
            GC.WaitForPendingFinalizers();

            //rule of thumb for releasing com objects:
            //  never use two dots, all COM objects must be referenced and released individually
            //  ex: [somthing].[something].[something] is bad

            //release com objects to fully kill excel process from running in the background
            Marshal.ReleaseComObject(xlRange);
            Marshal.ReleaseComObject(xlWorksheet);

            //close and release
            xlWorkbook.Close();
            Marshal.ReleaseComObject(xlWorkbook);

            //quit and release
            xlApp.Quit();
            Marshal.ReleaseComObject(xlApp);
        }
    } }

Answer 1

这很有用。我从this s.o帖子中得到了它。如果有人可以解释System.Reflection.Missing.Value，那将非常有帮助。

// Find the last real row
lastUsedRow = worksheet.Cells.Find("*",System.Reflection.Missing.Value, 
                               System.Reflection.Missing.Value, System.Reflection.Missing.Value, 
                               Excel.XlSearchOrder.xlByRows,Excel.XlSearchDirection.xlPrevious, 
                               false,System.Reflection.Missing.Value,System.Reflection.Missing.Value).Row;

// Find the last real column
lastUsedColumn = worksheet.Cells.Find("*", System.Reflection.Missing.Value, 
                               System.Reflection.Missing.Value,System.Reflection.Missing.Value, 
                               Excel.XlSearchOrder.xlByColumns,Excel.XlSearchDirection.xlPrevious, 
                               false,System.Reflection.Missing.Value,System.Reflection.Missing.Value).Column;

无法获得行数和列数（使用Microsoft.Office.Interop.Excel）

1 个答案: