Object - ToNullableBooleanOrDefault
An object extension method that converts this object to a nullable boolean or default.
public static void Main() { object thisValid = true; object thisNull = null; object thisInvalid = "FizzBuzz"; string format = "{0, -20} {1, -15}"; Console.WriteLine(format, "Object", "ToNullableBooleanOrDefault"); Console.WriteLine(format, "------", "--------------------------"); // C# Extension Method: Object - ToNullableBooleanOrDefault Console.WriteLine(format, thisValid, thisValid.ToNullableBooleanOrDefault()); Console.WriteLine(format, "null", thisNull.ToNullableBooleanOrDefault()); Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableBooleanOrDefault()); Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableBooleanOrDefault(false)); Console.WriteLine(format, thisInvalid, thisInvalid.ToNullableBooleanOrDefault(() => false)); }
View Source
using System; public static partial class Extensions { /// <summary> /// An object extension method that converts this object to a nullable boolean or default. /// </summary> /// <param name="this">The @this to act on.</param> /// <returns>The given data converted to a bool?</returns> public static bool? ToNullableBooleanOrDefault(this object @this) { try { if (@this == null || @this == DBNull.Value) { return null; } return Convert.ToBoolean(@this); } catch (Exception) { return default(bool); } } /// <summary> /// An object extension method that converts this object to a nullable boolean 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 bool?</returns> public static bool? ToNullableBooleanOrDefault(this object @this, bool? defaultValue) { try { if (@this == null || @this == DBNull.Value) { return null; } return Convert.ToBoolean(@this); } catch (Exception) { return defaultValue; } } /// <summary> /// An object extension method that converts this object to a nullable boolean 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 bool?</returns> public static bool? ToNullableBooleanOrDefault(this object @this, Func<bool?> defaultValueFactory) { try { if (@this == null || @this == DBNull.Value) { return null; } return Convert.ToBoolean(@this); } catch (Exception) { return defaultValueFactory(); } } }