Added CXMLReader for all XML-reading operations

Added GetIntValueRange to force a value to be in a specific range

VocaluxeLib/Menu/CXMLReader.cs

@@ -0,0 +1,221 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Xml.XPath;
+
+namespace Vocaluxe.Menu
+{
+    public class CXMLReader
+    {
+        private XPathNavigator _Navigator;
+
+        public CXMLReader(string uri)
+        {
+            XPathDocument xPathDoc = new XPathDocument(uri);
+            _Navigator = xPathDoc.CreateNavigator();
+        }
+
+        public XPathNavigator Navigator
+        {
+            get { return _Navigator; }
+        }
+
+        public static CXMLReader OpenFile(string sUri)
+        {
+            try
+            {
+                return new CXMLReader(sUri);
+            }
+            catch (Exception)
+            {
+                //TODO: How to log from here?
+                return null;
+            }
+        }
+        
+        public bool TryGetEnumValue<T>(string Cast, ref T value)
+            where T : struct
+        {
+            string val = String.Empty;
+            if (GetValue(Cast, ref val, Enum.GetName(typeof(T), value)))
+            {
+                CHelper.TryParse<T>(val, out value, true);
+                return true;
+            }
+            return false;
+        }
+
+        public bool TryGetIntValue(string Cast, ref int value)
+        {
+            string val = String.Empty;
+            if (GetValue(Cast, ref val, value.ToString()))
+            {
+                return int.TryParse(val, out value);
+            }
+            return false;
+        }
+
+        public bool TryGetIntValueRange(string Cast,ref int value, int min = 0, int max = 100)
+        {
+            bool result = TryGetIntValue(Cast, ref value);
+            if (result)
+            {
+                if (value < min)
+                    value = min;
+                else if (value > max)
+                    value = max;
+            }
+            return result;
+        }
+
+        public bool TryGetFloatValue(string Cast, ref float value)
+        {
+            string val = String.Empty;
+            if (GetValue(Cast, ref val, value.ToString()))
+            {
+                return CHelper.TryParse(val, out value);
+            }
+            return false;
+        }
+
+        public bool GetValue(string Cast, ref string Value, string DefaultValue)
+        {
+            XPathNodeIterator iterator;
+            int results = 0;
+            string val = string.Empty;
+
+            try
+            {
+                _Navigator.MoveToFirstChild();
+                iterator = _Navigator.Select(Cast);
+
+                while (iterator.MoveNext())
+                {
+                    val = iterator.Current.Value;
+                    results++;
+                }
+            }
+            catch (Exception)
+            {
+                results = 0;
+            }
+
+            if ((results == 0) || (results > 1))
+            {
+                Value = DefaultValue;
+                return false;
+            }
+            else
+            {
+                Value = val;
+                return true;
+            }
+
+        }
+
+        public List<string> GetValues(string Cast)
+        {
+            List<string> values = new List<string>();
+
+            try
+            {
+                _Navigator.MoveToRoot();
+                _Navigator.MoveToFirstChild();
+                _Navigator.MoveToFirstChild();
+
+                while (_Navigator.Name != Cast)
+                    _Navigator.MoveToNext();
+
+                _Navigator.MoveToFirstChild();
+
+                values.Add(_Navigator.LocalName);
+                while (_Navigator.MoveToNext())
+                    values.Add(_Navigator.LocalName);
+
+            }
+            catch (Exception)
+            {
+
+            }
+
+            return values;
+        }
+
+        public List<string> GetAttributes(string Cast, string attribute)
+        {
+            List<string> values = new List<string>();
+
+            try
+            {
+                _Navigator.MoveToRoot();
+                _Navigator.MoveToFirstChild();
+
+                while (_Navigator.Name != Cast)
+                    _Navigator.MoveToNext();
+
+                _Navigator.MoveToFirstChild();
+
+                values.Add(_Navigator.LocalName);
+                while (_Navigator.MoveToNext())
+                    values.Add(_Navigator.GetAttribute(attribute, ""));
+
+            }
+            catch (Exception)
+            {
+
+            }
+
+            return values;
+        }
+
+        public bool GetInnerValues(string Cast, ref List<string> Values)
+        {
+            try
+            {
+                _Navigator.MoveToRoot();
+                _Navigator.MoveToFirstChild();
+                _Navigator.MoveToFirstChild();
+
+                while (_Navigator.Name != Cast)
+                    _Navigator.MoveToNext();
+
+                _Navigator.MoveToFirstChild();
+
+                Values.Add(_Navigator.Value);
+                while (_Navigator.MoveToNext())
+                    Values.Add(_Navigator.Value);
+
+            }
+            catch
+            {
+                return false;
+            }
+
+            return true;
+        }
+
+        public bool ItemExists(string Cast)
+        {
+            XPathNodeIterator iterator;
+            int results = 0;
+
+            try
+            {
+                _Navigator.MoveToFirstChild();
+                iterator = _Navigator.Select(Cast);
+
+                while (iterator.MoveNext())
+                    results++;
+            }
+            catch (Exception)
+            {
+                results = 0;
+            }
+
+            if (results == 0)
+                return false;
+
+            return true;
+        }
+    }
+}