--- xmlTools/trunk/posUpdate/XmlTools.cs	2013/05/08 21:52:38	861
+++ xmlTools/trunk/posUpdate/XmlTools.cs	2013/05/09 10:37:17	867
@@ -40,7 +40,7 @@ namespace xmlTools
             List<XmlNode> myElements = new List<XmlNode>();
             Util.getAllSpecificElements(xdoc.DocumentElement, ref myElements, this.posElement, this.posParentElement); //Returns all after "Oni" element
 
-            if (valuePositions != "")
+            if (!String.IsNullOrEmpty(valuePositions))
             {
                 checkValidSpecificPositions(valuePositions, value, myElements[0].InnerText);
             }
@@ -49,11 +49,11 @@ namespace xmlTools
             {
                 if (element.Name == posElement)
                 {
-                    if (posParentElement != "" && element.ParentNode.Name != posParentElement)
+                    if (!String.IsNullOrEmpty(posParentElement) && element.ParentNode.Name != posParentElement)
                     {
                         continue;
                     }
-                    if (valuePositions == "") //replace every value for the new
+                    if (String.IsNullOrEmpty(valuePositions)) //replace every value for the new
                     {
                         element.InnerText = value;
                     }
@@ -90,7 +90,7 @@ namespace xmlTools
             {
                 if (element.Name == posElement)
                 {
-                    if (posParentElement != "" && element.ParentNode.Name != posParentElement)
+                    if (!String.IsNullOrEmpty(posParentElement) && element.ParentNode.Name != posParentElement)
                     {
                         continue;
                     }
@@ -140,7 +140,7 @@ namespace xmlTools
             {
                 if (element.Name == posElement)
                 {
-                    if (posParentElement != "" && element.ParentNode.Name != posParentElement)
+                    if (!String.IsNullOrEmpty(posParentElement) && element.ParentNode.Name != posParentElement)
                     {
                         continue;
                     }
@@ -184,7 +184,7 @@ namespace xmlTools
             {
                 if (element.Name == posElement)
                 {
-                    if (posParentElement != "" && element.ParentNode.Name != posParentElement)
+                    if (!String.IsNullOrEmpty(posParentElement) && element.ParentNode.Name != posParentElement)
                     {
                         continue;
                     }
@@ -229,7 +229,7 @@ namespace xmlTools
             List<XmlNode> myElements = new List<XmlNode>();
             Util.getAllSpecificElements(xdoc.DocumentElement, ref myElements, this.posElement, this.posParentElement); //Returns all after "Oni" element
 
-            if (valuePositions == null)
+            if (String.IsNullOrEmpty(valuePositions))
             {
                 newXmlLastPos = new XmlNumberValue(newValue);
             }
@@ -238,18 +238,18 @@ namespace xmlTools
                 newXmlLastPos = new XmlNumberValue(replaceSpecificPositions(myElements[0].InnerText, newValue, valuePositions));
             }
 
-            if (valuePositions != null)
+            if (!String.IsNullOrEmpty(valuePositions))
             {
                 checkValidSpecificPositions(valuePositions, newValue, myElements[0].InnerText);
             }
 
             foreach (XmlNode element in myElements)
             {
-                if (element.Name == this.posElement && (this.posParentElement == "" || this.posParentElement == element.ParentNode.Name))
+                if (element.Name == this.posElement && (String.IsNullOrEmpty(this.posParentElement) || this.posParentElement == element.ParentNode.Name))
                 {
                     XmlNumberValue xmlCurrValue = new XmlNumberValue(element.InnerText);
 
-                    if (xmlLastPos != null)
+                    if (xmlLastPos!=null)
                     {
                         newXmlLastPos = XmlNumberValue.sum(newXmlLastPos, XmlNumberValue.difference(xmlCurrValue, xmlLastPos));
                         element.InnerText = newXmlLastPos.ToString();
@@ -257,7 +257,7 @@ namespace xmlTools
                     }
                     else
                     { // first time just assign to last value
-                        if (valueRelation != null)
+                        if (!String.IsNullOrEmpty(valueRelation))
                         {
                             newXmlLastPos = XmlNumberValue.difference(newXmlLastPos, XmlNumberValue.difference(new XmlNumberValue(valueRelation), xmlCurrValue));
                         }