Object - ToNullableDateTimeOrDefault
An object extension method that converts this object to a nullable date time or default.
public static void Main() { object val1 = "06 July 2008 7:32:47 AM"; object val2 = "17:32:47.003"; object thisNull = null; object thisInvalid = "FizzBuzz"; DateTime defaultVal = "1/1/2000 12:00:00 AM".ToDateTime(); string format = "{0, -30} {1, -15}"; Console.WriteLine(format, "Object", "ToNullableDateTimeOrDefault"); Console.WriteLine(format, "------", "---------------------------"); // C# Extension Method: Object - ToNullableDateTimeOrDefault Console.WriteLine(format, val1, val1.ToNullableDateTimeOrDefault()); Console.WriteLine(format, val2, val2.ToNullableDateTimeOrDefault()); Console.WriteLine(format, "null", thisNull.ToNullableDateTimeOrDefault()); Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableDateTimeOrDefault()); Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableDateTimeOrDefault(defaultVal)); Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableDateTimeOrDefault(() => defaultVal)); }
View Source
using System; public static partial class Extensions { /// <summary> /// An object extension method that converts this object to a nullable date time or default. /// </summary> /// <param name="this">The @this to act on.</param> /// <returns>The given data converted to a DateTime?</returns> public static DateTime? ToNullableDateTimeOrDefault(this object @this) { try { if (@this == null || @this == DBNull.Value) { return null; } return Convert.ToDateTime(@this); } catch (Exception) { return default(DateTime); } } /// <summary> /// An object extension method that converts this object to a nullable date time or default. /// </summary> /// <param name="this">The @this to act on.</param> /// <param name="defaultValue">The default value.</param> /// <returns>The given data converted to a DateTime?</returns> public static DateTime? ToNullableDateTimeOrDefault(this object @this, DateTime? defaultValue) { try { if (@this == null || @this == DBNull.Value) { return null; } return Convert.ToDateTime(@this); } catch (Exception) { return defaultValue; } } /// <summary> /// An object extension method that converts this object to a nullable date time or default. /// </summary> /// <param name="this">The @this to act on.</param> /// <param name="defaultValueFactory">The default value factory.</param> /// <returns>The given data converted to a DateTime?</returns> public static DateTime? ToNullableDateTimeOrDefault(this object @this, Func<DateTime?> defaultValueFactory) { try { if (@this == null || @this == DBNull.Value) { return null; } return Convert.ToDateTime(@this); } catch (Exception) { return defaultValueFactory(); } } }