Insert a element in String array

I have string containing n elements.

I want to insert a automatically incremented number to the first position.

E.g Data

66,45,34,23,39,83
64,46,332,73,39,33 
54,76,32,23,96,42

I am spliting to string to array with split char ','

I want resultant array with a incremented number a first position

1,66,45,34,23,39,83
2,64,46,332,73,39,33
3,54,76,32,23,96,42
开发者_JAVA百科

Please suggest how can I do it.

Thanks

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You can't with an array, you need to use a List<string> instead.

For example:

List<string> words = new string[] { "Hello", "world" }.ToList();
words.Insert(0, "Well");

---

Linq has an easy way to accomplish your "mission":

First add the correct namespace:

using System.Linq;

And then:

// Translate your splitted string (array) in a list:
var myList = myString.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries).ToList<string>();

// Where insertPosition is the position you want to insert in:
myList.Insert(insertingPosition, insertedString);

// Back to array:
string[] myArray = myList.ToArray<string>();

Hope this helps...

---

You cannot insert anything to Array. Use List<T> instead.

---

You have to use something like an ArrayList instead, which has an ArrayList.Insert() method.

   ArrayList myAL = new ArrayList();
   myAL.Insert( 0, "The" );
   myAL.Insert( 1, "fox" );
   myAL.Insert( 2, "jumps" );
   myAL.Insert( 3, "over" );
   myAL.Insert( 4, "the" );
   myAL.Insert( 5, "dog" );

---

well what if you have the list like the following

string a="66,45,34,23,39,83";
string b="64,46,332,73,39,33"; 
string c="54,76,32,23,96,42";

before splitting a,b,c...

string[] s=new string[]{a,b,c};

for(int i=0; i<s.length;i++){
    s[i]=(i+1)+s[i];
}

now split each string in s

you will have a list like

1,66,45,34,23,39,83 2,64,46,332,73,39,33 3,54,76,32,23,96,42

I am not sure if I have understood your problem or not. :|

---

I know you want a C# answer (and there are good answers here already in that language), but I'm learning F# and took this on in that language as a learning exercise.

So, assuming you want an array of strings back and are willing to use F#...

let aStructuredStringArray = [|"66,45,34,23,39,83"
                               "64,46,332,73,39,33"
                               "54,76,32,23,96,42"|]

let insertRowCountAsString (structuredStringArray: string array) =
    [| for i in [0 .. structuredStringArray.Length-1] 
        do yield String.concat "" [ i.ToString(); ","; structuredStringArray.[i]]
            |]

printfn "insertRowCountAsString=%A" (insertRowCountAsString aStructuredStringArray)

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C# arrays cannot be resized. This means that you can't insert items.

You have two options:

1. Use a List<T> instead.
2. Create a new array, with one extra item in, copy the contents of the old one across and so on.

Option 1 is invariably to be preferred.

---

There is Array.Resize(T). On the face of it this contradicts what I state above. However, the documentation for this method states:

This method allocates a new array with the specified size, copies elements from the old array to the new one, and then replaces the old array with the new one.