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Tuesday 27 March 2012
Monday 19 March 2012
An Extension Method to Convert a Type to another Type
public static class ObjectExtensions public static class ObjectExtensions { public static T To(this object obj) { if (obj == DBNull.Value || obj == null) { return default(T); } Type newType = typeof(T); Type underLyingNewType = Nullable.GetUnderlyingType(newType); if (underLyingNewType == null) { // it means it's not a nullable type, so just convert it as normal return (T)Convert.ChangeType(obj, newType); } // it's a nullable type so convert it to the underlying type. return (T)Convert.ChangeType(obj, underLyingNewType); } }
And you can use it simply like:
[Test] public void TypeConversionTest() { var dbNullValue = DBNull.Value; var stringValue = "12"; var convertedToDateTime = dbNullValue.To(); var convertedToNullableDateTime = dbNullValue.To (); var stringConvertedToNullableInt = stringValue.To (); }
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