我通过表单中的文本文件通过SSIS包进入字符串：
"20090910" (string)@H_301_2@它需要
2010-09-01 00:00:00 (Date)@H_301_2@有什么建议？
试试
DateTime.ParseExact()
来自MSDN的数据示例：
Dim dateString,format As String
Dim result As Date
Dim provider As Globalization.CultureInfo = Globalization.CultureInfo.InvariantCulture
' Parse date and time with custom specifier.
dateString = "20090910"
format = "yyyyMMdd"
Try
result = Date.ParseExact(dateString,format,provider)
Console.WriteLine("{0} converts to {1}.",dateString,result.ToString())
Console.ReadLine()
Catch e As FormatException
Console.WriteLine("{0} is not in the correct format.",dateString)
End Try@H_301_2@