How can I mix 2 strings C#

Question

1.00/5 (3 votes)

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C#

string k = "ABC"; 
string l = "DEF"; 
string result = "ADBECF";

C#

using System;

namespace ADP_PG2_1_Solution
{
	public class MixStringsExercise
	{
		public static string MixStrings(string s, string t) {
			//Example : s= ABC, t = DEF ==> ADBECF 
			string L ;
			string next ;
			if (s.Length == t.Length) {
				L = s + t;
					} else {
						return null;
						}
						for(int i = 0; i <= s.Length; i ++ ){
				return s = 
							}
				
		
			return null;
		}
	}
}

Posted 28-Apr-16 10:02am

Member 12485203

Updated 28-Apr-16 20:56pm

Patrice T

v2

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Member 12485203 2-May-16 3:40am

thanks a lot . Al of u

3 solutions

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Afzaal Ahmad Zeeshan · Accepted Answer · 2016-04-28T14:04:00

The question although makes no sense, however, the string results seem as if you want to use 1 character from each and then get the result by incrementing the counter and appending the next characters from both arrays of characters (which, strings are).

C#

var builder = new StringBuilder();
string a = "ABC", b = "DEF";

for (int i = 0; i < a.Length; i++) {
   builder.Append(a[i]);
   builder.Append(b[i]);
}

Console.WriteLine(builder.ToString());

// Output:
// ADBECF

I used StringBuilder (as Sergey had suggested in the comments to Solution 1) to get a better performance because I don't have to worry about the concatenation here. However, the algorithm still has some problems because it works on arrays of same length; try to use an array with less indices.

phil.o · Accepted Answer · 2016-04-28T10:36:00

You have several choices to concat two strings:

C#

string s1 = "ABC";
string s2 = "DEF";

// Using + operator
string r1 = s1 + s2;

// Using String.Concat
string r2 = String.Concat(s1, s2);

// Using String.Format
string r3 = String.Format("{0}{1}", s1, s2);

// Using string literal (C# 5)
string r4 = $"{s1}{s2}";

// Using a StringBuilder (a bit overkill for this trivial task)
string r5 = new StringBuilder(s1.Length + s2.Length).Append(s1).Append(s2).ToString();

You can also copy the characters one by one in a buffer.

C#

char[] chars = new char(s1.Length + s2.Length);
int index = 0;
for (int i = 0; i < s1.Length; i++) {
   chars[index++] = s1[i];
}
for (int i = 0; i < s2.Length; i++) {
   chars[index++] = s2[i];
}
string r6 = new String(chars);

[Edit] Sorry for I misread your question. You can achieve it bu only slightly modifying the code block above:

C#

char[] chars = new char(s1.Length + s2.Length);
int index = 0;
for (int i = 0; i < s1.Length; i++) {
   chars[index] = s1[i];
   index += 2;
}
index = 1;
for (int i = 0; i < s2.Length; i++) {
   chars[index] = s2[i];
   index += 2;
}
string output = new String(chars);

koolprasad2003 · Accepted Answer · 2016-04-28T20:56:00

Couple of ways are there to complete your task
1. using 'StringBuilder'

C#

StringBuilder strBuilder= new StringBuilder();
string str1 = "str1";
string str2 = "str2";
//concate using string builder
strBuilder.Append(str1);
strBuilder.Append(str2);
//print it
Console.WriteLine(strBuilder.ToString());

2. String.Concat Method
It Concatenates two specified instances of String.

C#

string fName = "testFname";
string lName = "testLname";
string szOut =  string.Concat(fName, lName)

How can I mix 2 strings C#

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