System.Web.UI.WebControls.ImageField.GetFormattedAlternateText C# (CSharp) Method

		protected virtual string GetFormattedAlternateText (Control controlContainer)
		{
			if (DataAlternateTextField.Length > 0)
			{
				if (textProperty == null)
					textProperty = GetProperty (controlContainer, DataAlternateTextField);
					
				object value = GetValue (controlContainer, DataAlternateTextField, ref textProperty);
				
				if (value == null || (value.ToString().Length == 0 && ConvertEmptyStringToNull))
					return NullDisplayText;
				else if (DataAlternateTextFormatString.Length > 0)
					return string.Format (DataAlternateTextFormatString, value);
				else
					return value.ToString ();
			}
			else
				return AlternateText;
		
		}