How to remove comma seperated duplicate string values.

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Hi Guys,

I want to remove comma separated duplicate string values like :

C#

string ReturnStr = "2,5,12,35,2,12,78,45,35,78";

And I need :

C#

string ReturnStr = "2,5,12,35,78,45";

I can separate it but thats a long method, can any one tell me how can I do it shortly.

Posted 6-Jan-14 0:39am

Mas11

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JoCodes 6-Jan-14 6:51am

Which is the long method you tried?

3 solutions

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Karthik_Mahalingam · Accepted Answer · 2014-01-06T02:30:00

Solution 2

On top of Anuja solution.

Try this simple one.

C#

string ReturnStr = "2,5,12,35,2,12,78,45,35,78";
        string temp="";
        ReturnStr.Split(',').Distinct().ToList().ForEach(k => temp += k + ",");
        ReturnStr = temp.Trim(',');

Posted 6-Jan-14 2:30am

Karthik_Mahalingam

bowlturner · Accepted Answer · 2014-01-06T04:08:00

Solution 3

and even simpler one. I took answer 2 and simplified it

C#

string ReturnStr = "2,5,12,35,2,12,78,45,35,78";
string temp = string.Join(",", ReturnStr.Split(',').Distinct().ToArray());

Posted 6-Jan-14 4:08am

bowlturner

Comments

Santhosh Ks 28-Jun-19 4:58am

excellent.

selectexcs = selectexcs.TrimEnd(',').Trim();
for (dynamic i = 0, repl = new[,] { { ",,", "," }, { " ", "" } }; i < repl.Length / 2; i++)
{
selectexcs = selectexcs.Replace(repl[i, 0], repl[i, 1]);
selectexcs = selectexcs.Trim();
}
selectexcs= string.Join(",", selectexcs.Split(',').Distinct().ToArray());
numberofbagscanselled = selectexcs.Count(c => c == ',') +1;//duplication of strings separated with camma.

Anuja Pawar Indore · Accepted Answer · 2014-01-06T00:47:00

Solution 1

Try this

C#

string ReturnStr = "2,5,12,35,2,12,78,45,35,78";
            string[] words = ReturnStr.Split(',');
            List<string> list = new List<string>();
            foreach (string word in words)
            {
                if ( ! list.Contains(word))
                    list.Add(word);
            }

Updated
try this also

C#

if (ReturnStr .substring(ReturnStr .length-1, ReturnStr .length) == ",") {
        ReturnStr = ReturnStr .substring(0, ReturnStr .length-1);
    }
    TextBox1.Text = ReturnStr ;

Posted 6-Jan-14 0:47am

Anuja Pawar Indore

Updated 6-Jan-14 0:55am

v3

Comments

Mas11 6-Jan-14 7:03am

Below Method gives an error : Index and length must refer to a location within the string.
Parameter name: length

Mas11 6-Jan-14 7:19am

Thanks ! your first method work perfectly.

Anuja Pawar Indore 6-Jan-14 7:34am

Thanks............ Yes 2nd option is not working