Question

我无法将从ddl中提取的字符串值转换为DateTime数据类型。

错误讯息

类型＆＃39; System.FormatException＆＃39;的例外情况发生在mscorlib.dll中但未在用户代码中处理。附加信息：字符串是未被识别为有效的DateTime。

我只需要在SQL数据库中更新日期。

这是DataDictionary的图像，我要求的属性是生日

SQL Table http://i65.tinypic.com/ri4z95.jpg

这些是我当前获取并转换日期时间的代码。

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Answer 1

string date = "01/08/2008";
DateTime dt = Convert.ToDateTime(date);
Console.WriteLine("Year: {0}, Month: {1}, Day: {2}", dt.Year, dt.Month, dt.Day);

Answer 2

您可以使用TryParse来安全，而不是ParseExact。即：

var ddlDaySelectedItemValue = "29";
var ddlMonthSelectedItemValue = "Feb"; // February, 2, 02
var ddlYearSelectedItemValue = "2016";

DateTime birthDate;
string birth = ddlYearSelectedItemValue + " " + ddlMonthSelectedItemValue + " " + ddlDaySelectedItemValue;

if (DateTime.TryParse(birth, System.Globalization.CultureInfo.InvariantCulture, DateTimeStyles.None, out birthDate))
{
    objCustomer.birthDate = birthDate;
}

Answer 3

将您的代码更改为：

DateTime.ParseExact(birth, "dd-MM-yyyy", System.Globalization.CultureInfo.InvariantCulture);

将字符串转换为DateTime格式的问题

3 个答案: