public static object Convert(object value, Type type)
{
if (value == null)
{
if (IsNullable(type) == false)
{
throw new Exception("Given type " + type.Name + " cannot be null.");
}
else
{
return(null);
}
}
if (type.IsEnumeration() == true)
{
return(Enum.Parse(type, value.ToString(), true));
}
// Handle string to date time conversion
if (type == typeof(DateTime))
{
DateTime result;
// Return parsed date in local time zone
if (DateTime.TryParseExact(value.ToString(), new[] { Formats.DateTime, Formats.Date }, null, System.Globalization.DateTimeStyles.AdjustToUniversal, out result) == true)
{
return(result.ToLocalTime());
}
else
{
throw new Exception("Unsupported date time format.");
}
}
// Handle Datetime to string conversion.
if (type == typeof(string) && value is DateTime)
{
return(((DateTime)value).ToString("o"));
}
// Handle geocode to string conversion
if (type == typeof(Geocode) && value is string)
{
Geocode geo = null;
if (Geocode.TryParse(value as string, out geo) == false)
{
throw new Exception("Cannot convert " + value + " to a valid geocode.");
}
return(geo);
}
if (type.IsPrimitiveType() == true || type == typeof(string))
{
return(System.Convert.ChangeType(value, type, null));
}
throw new Exception("No automatic translation available for type " + type.Name + ".");
}
public void InvalidGeocodeTest()
{
var invalid = new[]
{
null, // null
string.Empty, // empty
" ", // space
"10,10,123", // incorrect number of args
"abc,abc", // non numeric values
"91,100", // incorrect latitude
"75,190", // incorrect longitude
};
Array.ForEach(invalid, value =>
{
Geocode geocode = null;
Assert.IsFalse(Geocode.TryParse(value, out geocode), "Invalid value {0} parsed successfully as {1}", value, geocode);
Assert.IsNull(geocode, "Invalid value {0} parsed successfully as {1}", value, geocode);
});
}
public void GeocodeParsingTest()
{
var geo = new Geocode(10.0m, 10.0m);
var valid = new[]
{
"10,10", // without decimal points
"10.0,10.0", // normal
" 10.0,10.0", // with leading spaces
"10.0,10.0", // with trailing spaces
"10.0 ,10.0 ", // with leading space before comma
"10.0, 10.0" // with trailing space after comma
};
Array.ForEach(valid, value =>
{
Geocode geocode = null;
Assert.IsTrue(Geocode.TryParse(value, out geocode), "Valid value {0} was not parsed correctly.", value);
Assert.IsNotNull(geocode, "Geocode parsed for {0} was null.", value);
Assert.IsTrue(geocode.Equals(geo), "Expected {0} but received {1}.", geo.ToString(), geocode.ToString());
});
}
