Want To retrieve string from my array [closed]

Answer 1

Here's a loop that does what you want:

string[] str = new[] { "null", "String 1", "String 2", "String 3", "null", "String 4", "String 5", "String 6", "null", "String 7", "String 8", "String 9" };
var newStr = new List<string>();
for (int i = 0; i < str.Length; i++)
{
    string current = str[i];
    if (current == "null")
    {
        int index = Array.IndexOf(str, "null", i + 1, str.Length - (i + 1));
        if (index >= 0)
        {
            newStr.Add(string.Join(" ", str.Skip(i + 1).Take(index - 1 - i)));
            i = index - 1;
        }
        else
        {
            if (i != str.Length - 1)
                newStr.Add(string.Join(" ", str.Skip(i + 1).Take(str.Length - i)));
            break;
        }
    }
}

It joins strings with a white-space at a specified index determined by the string null.

Answer 2

I suppose the null representation means a null string :

var array = arraySource.Where(n=> !string.IsNullOrEmpty(n)).ToArray();

Answer 3

Split it into defined parts but you need to use a list:

public static IEnumerable<IEnumerable<T>> Split<T>(this IEnumerable<T> list, int parts)
        {
          return list.Select((item, index) => new {index, item})
                       .GroupBy(x => (x.index + 1) / (list.Count()/parts) + 1)
                       .Select(x => x.Select(y => y.item));
        }

Answer 4

A little LINQ magic

var arr = new [] {null,"string1","string2","string3",null,"string4","string5","string6",null,"string7","string8","string9"};

var items = arr.Select( (item,index) => new {item, nextNull = Array.IndexOf(arr,null,index)} )
                           .GroupBy(x => x.nextNull)
                           .Where(x => x.Any(y => !String.IsNullOrEmpty(y.item)))
                           .Select(x => String.Join(" ",x.Select(y => y.item)));

Output:

string1 string2 string3
string4 string5 string6
string7 string8 string9

Live example: http://rextester.com/GOIT12899

Answer 5

If you have NULL as string in your array then you try:

string[] newArray = stringArray.Where(r => !r.Equals("null", StringComparison.InvariantCultureIgnoreCase))
                             .ToArray();

Answer 6

You can try on these lines

string[] myArray = new[] { "Stack", null, "OverFlow" };
string[] nulless = myArray.Where(t => !string.IsNullOrEmpty(t)).ToArray();