public override string ToString()
{
switch(FieldType)
{
case FieldType.String:
case FieldType.Time:
if (!FieldLength.HasValue)
throw new Exception("必须指定字段长度");
return StringValue.PadRight(FieldLength.Value);
case FieldType.Int:
if (!FieldLength.HasValue)
throw new Exception("必须指定字段长度");
if (!IntValue.HasValue)
throw new Exception("必须指定字段值");
return IntValue.ToString().PadRight(FieldLength.Value , '0');
case FieldType.Decimal:
if (!FieldLength.HasValue || !DecimalLength.HasValue)
throw new Exception("必须指定字段长度");
if (!DecimalValue.HasValue)
throw new Exception("必须指定字段值");
string format = "{0:" + 0.ToString().PadLeft(FieldLength.Value - DecimalLength.Value, '0') + "." + 0.ToString().PadRight(DecimalLength.Value, '0') + "}";
string ret = string.Format(format, DecimalValue);
if (DecimalValue.Value < 0)
ret = "-" + ret;
else
ret = "+" + ret;
return ret ;
case FieldType.Date:
if (!DateValue.HasValue)
throw new Exception("必须指定字段值");
if (DateValue.Value == DateTime.Parse("1900-01-01"))
return "".PadLeft(FieldLength.Value);
return DateValue.Value.ToString("MM/dd/yyyy");
default:
throw new Exception("未知的字段类型");
}
}