从 Excel 电子表格中读取数据：错误 CS0021

Question

为什么我会收到此错误消息？它抱怨的是我代码中的这一行：

website = x1range.Cells[i][1].value2;

我收到了

Error CS0021 Cannot apply indexing with [] to an expression of type 'object'

这是我的代码：

using System; using System.Threading; using OpenQA.Selenium; using
OpenQA.Selenium.Chrome; using excel =
Microsoft.Office.Interop.Excel;

namespace Create Editions
{
    class Program
    {
        static void Main(string[] args)
        {
            excel.Application x1app = new excel.Application();
            excel.Workbook x1workbook = x1app.Workbooks.Open(@"D:\DATA\CreateEditions.xlsx");
            excel._Worksheet x1worksheet = (excel._Worksheet)x1workbook.Sheets[1];
            excel.Range x1range = x1worksheet.UsedRange;
            string website;
    
            for(int i=1; i<=3; i++)
            {
               website = x1range.Cells[i][1].value2;
               IWebDriver driver = new ChromeDriver();
               driver.Navigate().GoToUrl(website);
            }
       }
   }
}

Answer 1

x1range.Cells[i] returns 一个 object 是 Range 索引器的 return 类型。所以请将x1range.Cells[i]的类型转换为Range。 Reference

website = (string)((Range)x1range.Cells[i])[1].value2;