/// <summary>
/// Tries to get the value of the specified object as the specified type.
/// </summary>
/// <typeparam name="T">A T that is the type that the object will be cast as.</typeparam>
/// <param name="Value">An object that is the object to be cast.</param>
/// <param name="value">A T that is the cast object, or the default value of T.</param>
/// <returns>A bool indicating success.</returns>
public static bool GetObjectAsValue <T>(object Value, out T value)
{
bool returnValue = false;
// Defaults
value = default;
if (Value != null)
{
if (Value is T)
{
value = (T)Value;
returnValue = true;
}
else if (typeof(T).IsEnum)
{
value = (T)Enum.Parse(typeof(T), Value.ToString());
returnValue = true;
}
else
{
MethodInfo TryParseMethod;
TryParseMethod = typeof(T).GetMethod("TryParse", new Type[] { typeof(string), typeof(T).MakeByRefType() });
if (TryParseMethod != null)
{
object result;
object[] tryParseParams;
tryParseParams = new object[] { Value.ToString(), null };
result = TryParseMethod.Invoke(null, tryParseParams);
if (result != null && result is bool && (bool)result)
{
value = (T)tryParseParams[1];
returnValue = true;
}
}
}
}
return(returnValue);
}
/// <summary>
/// Validates a value for range constraints
/// </summary>
/// <typeparam name="T">Type of object to be validated (int, double,...etc)</typeparam>
/// <param name="e">e.Cancel should be set to true if validation fails</param>
/// <param name="method">Delegate to try parsing the Text property</param>
private void ValidateValueRange <T>(CancelEventArgs e, TryParseMethod <T> tryParseMethod) where T : struct, IComparable, IConvertible
{
bool parseError = false;
T val;
if (tryParseMethod.Invoke(Text, out val))
{
T minimumValue, maximumValue;
// Minimum
if (!string.IsNullOrEmpty(MinimumValue))
{
if (tryParseMethod.Invoke(MinimumValue, out minimumValue))
{
if (MinimumValueIncluded)
{
e.Cancel = val.CompareTo(minimumValue) < 0;
}
else
{
e.Cancel = val.CompareTo(minimumValue) < 0 || val.CompareTo(minimumValue) == 0;
}
if (e.Cancel)
{
ErrorProvider.SetError(this, ActualBelowMinimumErrorMessage);
return;
}
}
else
{
parseError = true;
}
}
// Maximum
if (!string.IsNullOrEmpty(MaximumValue))
{
if (tryParseMethod.Invoke(MaximumValue, out maximumValue))
{
if (MaximumValueIncluded)
{
e.Cancel = val.CompareTo(maximumValue) > 0;
}
else
{
e.Cancel = val.CompareTo(maximumValue) > 0 || val.CompareTo(maximumValue) == 0;
}
if (e.Cancel)
{
ErrorProvider.SetError(this, ActualAboveMaximumErrorMessage);
return;
}
}
else
{
parseError = true;
}
}
}
else
{
parseError = true;
}
if (parseError)
{
e.Cancel = true;
ErrorProvider.SetError(this, Messages.InvalidInput);
}
}