CODEWITHSUNDEEP
c#stringstringbuilder
mahua22
mahua22

Reputation: 151

create array of string builder instead of string

I am creating an application in window application using c#. I have a string array,and its value will be updated in each timer tick event. later on ,i have to convert this array into object array. I know, if we are modifying string many times,it can be time consuming to create new string objects.so i want to use stringBuilder.

let say, in timer tick event:

for (int i = 0; i < 10; i++)
  {
     n[i] = i.ToString();
  }

where n is the string array and i want to use stringbuilder instead of array. is it possible? how do i do this? how do i convert stringBuilder type to object type?

Upvotes: 1

Views: 9835

Answers (5)

Adarsh Kumar
Adarsh Kumar

Reputation: 1150

I would suggest you to use code something like :

class Program
{
    static void Main(string[] args)
    {
        var dic = new Dictionary<int, StringBuilder>();

        //Initialize dictionary
        for (int i = 0; i < 10; i++)
        {
            dic.Add(i, new StringBuilder());
        }

        TimerElapsed(dic);

        TimerElapsed(dic);

        Process(dic.Values.ToArray());
    }

    public static void Process(object[] objects)
    {
        //Do your processing
    }

    public static void TimerElapsed(IDictionary<int, StringBuilder> dic)
    {
        for (int i = 0; i < 10; i++)
        {
            dic[i].Append(i.ToString());
        }
    }
}

Such code will give you benefits of collection and flexibility (for eg: you could convert to array easily)

Upvotes: 0

Tim Schmelter
Tim Schmelter

Reputation: 460138

Here is another approach that does not need to use an array or StringBuilder and which should be efficient enough if the sequence is not too large:

string nums = String.Join("", Enumerable.Range(0, 10));

However, string.Join is really efficient if the input is already an array. In this case it might really be more efficient to use a StringBuilder:

string nums =  Enumerable.Range(0, 10)
    .Aggregate(new StringBuilder(), (a, b) => a.Append(b))
    .ToString();

Upvotes: 0

Jeroen Vannevel
Jeroen Vannevel

Reputation: 44439

You can keep your array of strings and use a StringBuilder in the loop.

var myValues = new String[100];

void tick() {
 var sb = new StringBuilder();

 for (int i = 0; i < 10; i++){
  sb.append(i.ToString());
 }

 myValues.add(sb.ToString());
}

This adds all values in the range of 0 to 10 to one string. I don't know why you'd need this, so if you want to do something different you should clarify.

Upvotes: 1

Henk Holterman
Henk Holterman

Reputation: 273264

You do not need a StringBuilder here. A StringBuilder is only called for when processing (usually: concatenating) a single string many times. You have many small and unrelated strings.

What you probably want is to replace the array string[] with a List<string>.

Upvotes: 2

Pawan
Pawan

Reputation: 1075

You can do something like this 

 StringBuilder obj=new StringBuilder();

    for (int i = 0; i < 10; i++)
      {
          obj.append(i.ToString());
      }

Upvotes: 0

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