public IEnumerable<int> FindIndex(string stringToSearchIn, enIndexFinderOccurrence occurrence, string charsToSearchFor, enIndexFinderDirection direction, bool matchCase, int startIndex)
{
IEnumerable<int> result = new[] { -1 };
if(!string.IsNullOrEmpty(stringToSearchIn) && !string.IsNullOrEmpty(charsToSearchFor))
{
#region Calculate the index according to what the user enterd
var comparisonType = matchCase ? StringComparison.Ordinal : StringComparison.OrdinalIgnoreCase;
int firstIndex = stringToSearchIn.IndexOf(charsToSearchFor, startIndex, comparisonType);
int lastIndex = stringToSearchIn.LastIndexOf(charsToSearchFor, stringToSearchIn.Length - 1, comparisonType);
if(direction == enIndexFinderDirection.RightToLeft)
{
result = RightToLeftIndexSearch(occurrence, firstIndex, lastIndex, stringToSearchIn, charsToSearchFor,
comparisonType);
}
else
{
result = LeftToRightIndexSearch(occurrence, firstIndex, lastIndex, stringToSearchIn, charsToSearchFor,
comparisonType);
}
#endregion
}
return result;
}
public IEnumerable <int> FindIndex(string stringToSearchIn, enIndexFinderOccurrence occurrence, string charsToSearchFor, enIndexFinderDirection direction, bool matchCase, int startIndex)
{
IEnumerable <int> result = new[] { -1 };
if (!string.IsNullOrEmpty(stringToSearchIn) && !string.IsNullOrEmpty(charsToSearchFor))
{
#region Calculate the index according to what the user enterd
var comparisonType = matchCase ? StringComparison.Ordinal : StringComparison.OrdinalIgnoreCase;
int firstIndex = stringToSearchIn.IndexOf(charsToSearchFor, startIndex, comparisonType);
int lastIndex = stringToSearchIn.LastIndexOf(charsToSearchFor, stringToSearchIn.Length - 1, comparisonType);
if (direction == enIndexFinderDirection.RightToLeft)
{
result = RightToLeftIndexSearch(occurrence, firstIndex, lastIndex, stringToSearchIn, charsToSearchFor,
comparisonType);
}
else
{
result = LeftToRightIndexSearch(occurrence, firstIndex, lastIndex, stringToSearchIn, charsToSearchFor,
comparisonType);
}
#endregion
}
return(result);
}
private IEnumerable <int> LeftToRightIndexSearch(enIndexFinderOccurrence occurrence, int firstIndex, int lastIndex, string stringToSearchIn, string charsToSearchFor, StringComparison comparisonType)
{
int index = -1;
IEnumerable <int> result;
switch (occurrence)
{
case enIndexFinderOccurrence.FirstOccurrence:
if (firstIndex != -1)
{
index = firstIndex + 1;
}
result = new[] { index };
break;
case enIndexFinderOccurrence.LastOccurrence:
if (lastIndex != -1)
{
index = lastIndex + 1;
}
result = new[] { index };
break;
case enIndexFinderOccurrence.AllOccurrences:
List <int> foundIndexes;
if (firstIndex != -1)
{
foundIndexes = new List <int> {
firstIndex + 1
};
int currentIndex = firstIndex;
while (currentIndex != -1)
{
currentIndex = stringToSearchIn.IndexOf(charsToSearchFor, currentIndex + 1, comparisonType);
if (currentIndex != -1)
{
foundIndexes.Add(currentIndex + 1);
}
}
}
else
{
foundIndexes = new List <int> {
firstIndex
};
}
result = foundIndexes.ToArray();
break;
default:
throw new Exception("Error In Dev2IndexFinder");
}
return(result);
}
public IEnumerable <int> FindIndex(string stringToSearchIn, string firstOccurrence, string charsToSearchFor, string direction, bool matchCase, string startIndex)
{
enIndexFinderOccurrence occurrence = enIndexFinderOccurrence.FirstOccurrence;
enIndexFinderDirection dir = enIndexFinderDirection.LeftToRight;
int startIdx;
#region Set the enums according to the strings
switch (firstOccurrence)
{
case "First Occurrence":
occurrence = enIndexFinderOccurrence.FirstOccurrence;
break;
case "Last Occurrence":
occurrence = enIndexFinderOccurrence.LastOccurrence;
break;
case "All Occurrences":
occurrence = enIndexFinderOccurrence.AllOccurrences;
break;
}
switch (direction)
{
case "Left to Right":
dir = enIndexFinderDirection.LeftToRight;
break;
case "Right to Left":
dir = enIndexFinderDirection.RightToLeft;
break;
}
startIndex = !string.IsNullOrWhiteSpace(startIndex) ? startIndex : "0";
if (!int.TryParse(startIndex, out startIdx))
{
throw new Exception("The start index specified was not a number.");
}
#endregion
return(FindIndex(stringToSearchIn, occurrence, charsToSearchFor, dir, matchCase, startIdx));
}
private IEnumerable <int> RightToLeftIndexSearch(enIndexFinderOccurrence occurrence, int firstIndex, int lastIndex, string stringToSearchIn, string charsToSearchFor, StringComparison comparisonType)
{
int index = -1;
IEnumerable <int> result;
switch (occurrence)
{
case enIndexFinderOccurrence.FirstOccurrence:
if (lastIndex != -1)
{
index = stringToSearchIn.Length - lastIndex - (charsToSearchFor.Length - 1);
}
result = new[] { index };
break;
case enIndexFinderOccurrence.LastOccurrence:
if (firstIndex != -1)
{
index = stringToSearchIn.Length - firstIndex - (charsToSearchFor.Length - 1);
}
result = new[] { index };
break;
case enIndexFinderOccurrence.AllOccurrences:
List <int> foundIndexes = new List <int>();
stringToSearchIn = stringToSearchIn.ReverseString();
int currentIndex = firstIndex;
while (currentIndex != -1 && currentIndex != stringToSearchIn.Length)
{
currentIndex = stringToSearchIn.IndexOf(charsToSearchFor, currentIndex, comparisonType);
if (currentIndex != -1)
{
currentIndex++;
foundIndexes.Add(currentIndex);
}
}
result = foundIndexes.ToArray();
break;
default:
throw new Exception("Error In Dev2IndexFinder");
}
return(result);
}
IEnumerable <int> LeftToRightIndexSearch(enIndexFinderOccurrence occurrence, int firstIndex, int lastIndex, string stringToSearchIn, string charsToSearchFor, StringComparison comparisonType)
{
var index = -1;
IEnumerable <int> result;
switch (occurrence)
{
case enIndexFinderOccurrence.FirstOccurrence:
if (firstIndex != -1)
{
index = firstIndex + 1;
}
result = new[] { index };
break;
case enIndexFinderOccurrence.LastOccurrence:
if (lastIndex != -1)
{
index = lastIndex + 1;
}
result = new[] { index };
break;
case enIndexFinderOccurrence.AllOccurrences:
List <int> foundIndexes;
foundIndexes = firstIndex != -1 ? FindAll(firstIndex, stringToSearchIn, charsToSearchFor, comparisonType) : new List <int> {
firstIndex
};
result = foundIndexes.ToArray();
break;
default:
throw new Exception(ErrorResource.ErrorInDev2IndexFinder);
}
return(result);
}
private IEnumerable<int> LeftToRightIndexSearch(enIndexFinderOccurrence occurrence, int firstIndex, int lastIndex, string stringToSearchIn, string charsToSearchFor, StringComparison comparisonType)
{
int index = -1;
IEnumerable<int> result;
switch(occurrence)
{
case enIndexFinderOccurrence.FirstOccurrence:
if(firstIndex != -1)
{
index = firstIndex + 1;
}
result = new[] { index };
break;
case enIndexFinderOccurrence.LastOccurrence:
if(lastIndex != -1)
{
index = lastIndex + 1;
}
result = new[] { index };
break;
case enIndexFinderOccurrence.AllOccurrences:
List<int> foundIndexes;
if(firstIndex != -1)
{
foundIndexes = new List<int> { firstIndex + 1 };
int currentIndex = firstIndex;
while(currentIndex != -1)
{
currentIndex = stringToSearchIn.IndexOf(charsToSearchFor, currentIndex + 1, comparisonType);
if(currentIndex != -1)
{
foundIndexes.Add(currentIndex + 1);
}
}
}
else
{
foundIndexes = new List<int> { firstIndex };
}
result = foundIndexes.ToArray();
break;
default:
throw new Exception("Error In Dev2IndexFinder");
}
return result;
}
private IEnumerable<int> RightToLeftIndexSearch(enIndexFinderOccurrence occurrence, int firstIndex, int lastIndex, string stringToSearchIn, string charsToSearchFor, StringComparison comparisonType)
{
int index = -1;
IEnumerable<int> result;
switch(occurrence)
{
case enIndexFinderOccurrence.FirstOccurrence:
if(lastIndex != -1)
{
index = stringToSearchIn.Length - lastIndex - (charsToSearchFor.Length - 1);
}
result = new[] { index };
break;
case enIndexFinderOccurrence.LastOccurrence:
if(firstIndex != -1)
{
index = stringToSearchIn.Length - firstIndex - (charsToSearchFor.Length - 1);
}
result = new[] { index };
break;
case enIndexFinderOccurrence.AllOccurrences:
List<int> foundIndexes = new List<int>();
stringToSearchIn = stringToSearchIn.ReverseString();
int currentIndex = firstIndex;
while(currentIndex != -1 && currentIndex != stringToSearchIn.Length)
{
currentIndex = stringToSearchIn.IndexOf(charsToSearchFor, currentIndex, comparisonType);
if(currentIndex != -1)
{
currentIndex++;
foundIndexes.Add(currentIndex);
}
}
result = foundIndexes.ToArray();
break;
default:
throw new Exception("Error In Dev2IndexFinder");
}
return result;
}
