Question

我试图从Excel文件中读取一行出于某种原因，当我尝试读取整数值（ID列）时出现错误。

代码的作用是从Excel文件中读取信息然后存储它。

在UserInfo中实现为数组。
(Excel File Image)

它会抛出此错误：ErrorImage

   class UserInfo
   {
           public int ID { get; set; }
           public string firstName { get; set; }
           public string lastName { get; set; }
           public string IDNumber { get; set; }
           public string email { get; set; }
   }


    private void openExcelFile(string excelFile)
    {
        UserInfo[] user = new UserInfo[2];
        label1.Text += "Initalize Excel Application And Reading Data";
        ///Read From Excel File And Store in array
        Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
        Workbook xlWorkbook = xlApp.Workbooks.Open(excelFile);
        _Worksheet xlWorksheet = xlWorkbook.Sheets[1];
        Range xlRange = xlWorksheet.UsedRange;
        int rowCount = xlRange.Rows.Count;
        //Start to read from row 2
        for (int i = 2; i <= rowCount; i++)
        {
            user[i - 2] = new UserInfo();
            Range range1 = xlWorksheet.Rows[i];
            user[i - 2].firstName = range1.Cells[i, 1].Value2;
            user[i - 2].lastName = range1.Cells[i, 2].Value2;
            user[i - 2].ID = range1.Cells[i, 3].Value2; //Error
            user[i - 2].email = range1.Cells[i, 4].Value2;
        }

        label1.Text += "Done!\nStart Sql Process:\n";
        //Cleaning GC,Dealing memory
        GC.Collect();
        GC.WaitForPendingFinalizers();
        //close and release
        xlWorkbook.Close();
        Marshal.ReleaseComObject(xlWorkbook);
        //quit and release
        xlApp.Quit(); 
    }
}

Answer 1

我之前遇到的一个错误是，该特定单元格的数据类型可能不是int，因此无法将该单元格的数据转换为int。您可以尝试使用以下示例作为解决方法：

Range r = activeWorksheet.get_Range("A3","F3");
int d;
if (r.Cells[3, 5].Value2 != null) 
{
    var c = r.Cells[3, 5].Value2.ToString();
    d = Convert.ToInt32(c);
}
else
{
    d = 0;
}

从excel文件中读取错误

1 个答案: