Object - ToNullableGuidOrDefault
An object extension method that converts this object to a nullable unique identifier or default.
public static void Main() { object val1 = "ca761232ed4211cebacd00aa0057b223"; object val2 = "{0xCA761232, 0xED42, 0x11CE, {0xBA, 0xCD, 0x00, 0xAA, 0x00, 0x57, 0xB2, 0x23}}"; object thisNull = null; object thisInvalid = "A100"; string format = "{0, -100} {1, -15}"; Console.WriteLine(format, "Object", "ToNullableGuidOrDefault"); Console.WriteLine(format, "------", "-----------------------"); // C# Extension Method: Object - ToNullableGuidOrDefault Console.WriteLine(format, val1, val1.ToNullableGuidOrDefault()); Console.WriteLine(format, val2, val2.ToNullableGuidOrDefault()); Console.WriteLine(format, "null", thisNull.ToNullableGuidOrDefault()); Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableGuidOrDefault()); Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableGuidOrDefault(Guid.NewGuid())); Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableGuidOrDefault(() => Guid.NewGuid())); }
View Source
using System; public static partial class Extensions { /// <summary> /// An object extension method that converts this object to a nullable unique identifier or default. /// </summary> /// <param name="this">The @this to act on.</param> /// <returns>The given data converted to a Guid?</returns> public static Guid? ToNullableGuidOrDefault(this object @this) { try { if (@this == null || @this == DBNull.Value) { return null; } return new Guid(@this.ToString()); } catch (Exception) { return Guid.Empty; } } /// <summary> /// An object extension method that converts this object to a nullable unique identifier 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 Guid?</returns> public static Guid? ToNullableGuidOrDefault(this object @this, Guid? defaultValue) { try { if (@this == null || @this == DBNull.Value) { return null; } return new Guid(@this.ToString()); } catch (Exception) { return defaultValue; } } /// <summary> /// An object extension method that converts this object to a nullable unique identifier 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 Guid?</returns> public static Guid? ToNullableGuidOrDefault(this object @this, Func<Guid?> defaultValueFactory) { try { if (@this == null || @this == DBNull.Value) { return null; } return new Guid(@this.ToString()); } catch (Exception) { return defaultValueFactory(); } } }