试图细胞的数据添加到一个ArrayList，但得到"无法转换成Double类型为String的。
在细胞内的值是'1'的类型是一般。当我在工作簿中的头拉，他们所有的工作。
[EDIT1]当我输入我改变（杜）col1.Add((string)(ws.Cells[currentRow, "A"] as Excel1.Range).Value2);
现在一切正常。
所以我现在的问题是，所有的数字是从Excel双打？
[EDIT2]我看了任务管理器中，有一大堆的EXCEL.EXE的开放，我怎么关闭呢？
public void ReadSheet()
{
try
{
Excel1.Application app = new Excel1.Application();
Excel1.Workbook wb = app.Workbooks.Open(this.txtBoxFile.Text, 0, true, 5, "", "", true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
Excel1.Sheets sheets = wb.Worksheets;
Excel1.Worksheet ws = (Excel1.Worksheet)sheets[1];
int currentRow = 2;
while ((ws.Cells[currentRow, "A"] as Excel1.Range).Value2 != null && (ws.Cells[currentRow, "B"] as Excel1.Range).Value2 != null)
{
MessageBox.Show("1");
col1.Add((string)(ws.Cells[currentRow, "A"] as Excel1.Range).Value2);
col2.Add((string)(ws.Cells[currentRow, "B"] as Excel1.Range).Value2);
col3.Add((string)(ws.Cells[currentRow, "C"] as Excel1.Range).Value2);
col4.Add((string)(ws.Cells[currentRow, "D"] as Excel1.Range).Value2);
MessageBox.Show("2");
currentRow++;
}
GC.Collect();
GC.WaitForPendingFinalizers();
Marshal.FinalReleaseComObject(ws);
Marshal.FinalReleaseComObject(sheets);
wb.Close(false, Type.Missing, Type.Missing);
Marshal.FinalReleaseComObject(wb);
app.Quit();
Marshal.FinalReleaseComObject(app);
}
catch(InvalidCastException ic)
{
MessageBox.Show(ic.Message, "CastException");
}
catch (Exception e)
{
MessageBox.Show(e.Message, "Exception");
}
finally
{
//
ExcelToTxt();
}
}