Castle.MonoRail.Framework.Helpers.FormHelper.CheckForExistenceAndExtractIndex C# (CSharp) Method

		private static bool CheckForExistenceAndExtractIndex(ref string property, out int index)
		{
			bool isIndexed = property.IndexOf('[') != -1;

			index = -1;

			if (isIndexed)
			{
				int start = property.IndexOf('[') + 1;
				int len = property.IndexOf(']', start) - start;

				string indexStr = property.Substring(start, len);

				try
				{
					index = Convert.ToInt32(indexStr);
				}
				catch(Exception)
				{
					throw new RailsException("Could not convert (param {0}) index to Int32. Value is {1}", 
						property, indexStr);
				}

				property = property.Substring(0, start - 1);
			}

			return isIndexed;
		}