System.InvalidCastException Double to String

Question

以下代码打开Excel电子表格并逐个单元格地浏览它.该Console.WriteLine调用用于检查它是否正常工作.

xlApp = new Excel.Application();
xlWorkBook = xlApp.Workbooks.Open(@"\Extracts\Test.xlsx", 0, true, 5, "", "", true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);

range = xlWorkSheet.UsedRange;
rw = range.Rows.Count;
cl = range.Columns.Count;

for (rCnt = 1; rCnt <= rw; rCnt++)
{
    for (cCnt = 1; cCnt <= cl; cCnt++)
    {
        string str = (string)(range.Cells[rCnt, cCnt] as Excel.Range).Value2;
        Console.WriteLine("Row:", str.ToString());
    }
}

我收到错误:

System.InvalidCastException'无法将类型为'System.Double'的对象强制转换为'System.String'.'

这是指行:

string str = (string)(range.Cells[rCnt, cCnt] as Excel.Range).Value2;

我知道有另一个问题有相同的错误,但该解决方案在这种情况下似乎不起作用.

感谢谢谢.

Answer 1

不要施加双重值.只需调用ToString即可

此实例的值的字符串表示形式.

string str = (range.Cells[rCnt, cCnt] as Excel.Range).Value2.ToString();

编辑:

ToString不需要调用字符串,因为它已经是一个字符串.你可以这样写:

Console.WriteLine("Row:", str);