Zip My Code

using ZipMyCode.Properties;
using ZipMyCode.UI.Mvvm.Validation;

namespace ZipMyCode.UI.ExcludeItem
{
	/// <summary>
	/// Rule validating that a string is not null or empty.
	/// </summary>
	class NotNullOrEmptyValidationRule : IValidationRule
	{
		/// <summary>
		/// Validates a value.
		/// </summary>
		/// <param name="value">The value to validate.</param>
		/// <returns>true if validation is successful; otherwise false.</returns>
		public bool Validate(object value)
		{
			string valueText = value as string;

			if (string.IsNullOrEmpty(valueText))
			{
				ErrorMessage = Resources.NotNullValidationRule_Error;
				return false;
			}

			ErrorMessage = string.Empty;
			return true;
		}


		/// <summary>
		/// Gets the error message if validation fails; otherwise an empty string ("").
		/// </summary>
		public string ErrorMessage { get; private set; }
	}
}