using Excel = Microsoft.Office.Interop.Excel;

Excel.Application xlApp = new Excel.Application();
Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(@"Book1.xlsx",true,5,"",Excel.XlPlatform.xlWindows,"\t",false,1,0);
Excel._Worksheet xlWorksheet = (Excel._Worksheet)xlWorkbook.Sheets[1];
Excel.Range xlRange = xlWorksheet.UsedRange;

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

for (int i = 1; i <= rowCount; i++)
{
    for (int j = 1; j <= colCount; j++)
    {
        MessageBox.Show(xlWorksheet.Cells[i,j].ToString());
    }
}

我收到一个消息框,说出一些关于System .__ ComObject而不是一个值.
如何解决这个问题？