Adding Missed Values To A String

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Hi All...
i have one string Like Str="1,2,4,6" Here I need to add values 3 in between 2 and 4 and also add value 5 in between 4 and 6 ,i tried in many ways but i did't get solution
can any one please help me
thanks in advance

Posted 7-Apr-11 22:24pm

tulasiram3975

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4 solutions

Solution 3

You can do it in this way :

C#

String Str = "1,2,4,6";

// Pass the number to add and Str.
// It will return you a String with sorted numbers
private String NumberToAdd(int num, String baseString)
{
String[] ar = str.Split(',');
List<String> list = new List<String>();
list.AddRange(ar);
list.Add(num.ToString());
list.Sort();

int count = list.Count;
StringBuilder builder = new StringBuilder();
for (int i = 0; i < count; i++)
{
    if (i != count - 1)
    {
        builder.Append(list[i] + ",");
    }
    else
    {
        builder.Append(list[i]);
    }
}
return builder.ToString();
}

Posted 7-Apr-11 23:51pm

Tarun.K.S

Updated 7-Apr-11 23:55pm

v2

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OriginalGriff · Accepted Answer · 2011-04-07T22:29:00

I assume that "1,2,4,6" is just an example?
If your string is always going to be comma separated, then consider splitting the string, and rebuilding it:

string myString = "1,2,4,6";
string[] parts = myString.Split(',');
StringBuilder sb = new StringBuilder();
sb.Append(parts[0]);
sb.Append(",");
sb.Append(parts[1]);
sb.Append(",3,");
sb.Append(parts[2]);
sb.Append(",5,");
sb.Append(parts[3]);
myString = sb.toString():

"Dear Sir,
I Get String From Runtime I Dont Know How It Will Came Either Like (1,2,5,7) Or Else (3,4,6) So On.. Here My Problem Is I Need To Add Missing Values"

Then I would do much the same as above, but use the first and last values to generate the intermediate ones:

string myString = "1,2,4,6";
string[] parts = myString.Split(',');
int first = int.Parse(parts[0]);
int last = int.Parse(parts[parts.Length - 1]);
StringBuilder sb = new StringBuilder();
string separator = "";
for (int i = first; i <= last; i++)
    {
    sb.Append(separator);
    sb.Append(i.ToString());
    separator = ",";
    }
myString = sb.ToString();
Console.WriteLine(myString);

This assumes that the incoming string is effectively sorted! If not, then you have to do something about that first!

Olivier Levrey · Accepted Answer · 2011-04-07T23:03:00

As OriginalGriff told you, you can split the strings and rebuild them.
Between these two operations, you can construct a list of int and sort it:

C#

void FillList(List<int> list, string str)
{
    //split the string
    string[] parts = str.Split(',');
    //convert each part to int and put each int in a list
    foreach (string s in parts)
        list.Add(int.Parse(s));
}

void func()
{
    List<int> list = new List<int>();
    //fill the list
    FillList(list, "1,2,4,6");
    FillList(list, "3,5");
    //sort the list
    list.Sort();
    //build the final string
    StringBuilder sb = new StringBuilder();
    foreach (int i in list)
    {
        sb.Append(i);
        sb.Append(",");
    }
    string finalString = sb.ToString();
    ....
}

Oshtri Deka · Accepted Answer · 2011-04-07T23:54:00

If it is going to be a string representing integers delimited with comma I would use method which will do all the nasty work for me. For instance try this one:

string MyStringMethod(string originalString, string newValue)
{
  //original string is dissected to array of strings 
  string[] pomArr = originalString.Split(',');
  //List<t> offers all functionality I need for this.
  List<string> pomList = new List<string>();
  pomList.AddRange(pomArr);
  //new value
  pomList.Add(newValue);
  //magic :)! Sort() method is our friend
  pomList.Sort();
  //caller gets new string with properly inserted new value
  return string.Join(",", pomList.ToArray());
}</string></string></t>

It is simple and I believe self-explanatory.

Adding Missed Values To A String

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