ReportsDateTimeDisplayHelper.cs
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using System.Globalization;
namespace FoodLabeling.Application.Helpers;
/// <summary>
/// Reports Print Log 日期时间展示：统一为年月日顺序 <c>yyyy-MM-dd HH:mm</c>（精确到分钟）。
/// </summary>
public static class ReportsDateTimeDisplayHelper
{
public const string DisplayFormat = "yyyy-MM-dd HH:mm";
private static readonly string[] ExpiryParseFormats =
{
DisplayFormat,
"yyyy-MM-dd H:mm",
"yyyy-MM-dd",
"yyyy/MM/dd HH:mm",
"yyyy/MM/dd",
"MM/dd/yyyy hh:mm tt",
"MM/dd/yyyy h:mm tt",
"MM/dd/yyyy HH:mm",
"MM/dd/yyyy",
"M/d/yyyy hh:mm tt",
"M/d/yyyy h:mm tt",
"M/d/yyyy",
"dd/MM/yyyy HH:mm",
"dd/MM/yyyy",
"d/M/yyyy HH:mm",
"d/M/yyyy",
};
/// <summary>打印时间展示（Printed at 列）</summary>
public static string FormatPrintedAt(DateTime printedAt)
{
if (printedAt == DateTime.MinValue)
{
return "无";
}
return printedAt.ToString(DisplayFormat, CultureInfo.InvariantCulture);
}
/// <summary>保质期展示（Expiration 列）：解析后统一为 <see cref="DisplayFormat"/>。</summary>
public static string FormatExpiryDisplay(string? raw)
{
if (string.IsNullOrWhiteSpace(raw) || string.Equals(raw.Trim(), "无", StringComparison.Ordinal))
{
return "无";
}
var s = raw.Trim();
if (TryParseToDateTime(s, out var dt))
{
return dt.ToString(DisplayFormat, CultureInfo.InvariantCulture);
}
return s;
}
private static bool TryParseToDateTime(string s, out DateTime dt)
{
if (DateTime.TryParse(
s,
CultureInfo.InvariantCulture,
DateTimeStyles.AllowWhiteSpaces | DateTimeStyles.AssumeLocal,
out dt))
{
return true;
}
if (DateTime.TryParse(
s,
CultureInfo.GetCultureInfo("en-US"),
DateTimeStyles.AllowWhiteSpaces | DateTimeStyles.AssumeLocal,
out dt))
{
return true;
}
foreach (var fmt in ExpiryParseFormats)
{
if (DateTime.TryParseExact(
s,
fmt,
CultureInfo.InvariantCulture,
DateTimeStyles.AllowWhiteSpaces | DateTimeStyles.AssumeLocal,
out dt))
{
return true;
}
if (DateTime.TryParseExact(
s,
fmt,
CultureInfo.GetCultureInfo("en-US"),
DateTimeStyles.AllowWhiteSpaces | DateTimeStyles.AssumeLocal,
out dt))
{
return true;
}
}
return false;
}
}