How can I check string inside list string

Question

1.00/5 (1 vote)

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Hi,

I need to check whether string is in list string or not, if not then I need to do something

C#

string fieldFromDB2;
List<string> commonMsgId = new List<string>();
commonMsgId.Add(fieldFromDB2);
if(!(fieldFromDB2==commonMsgId))
//do something

This code will work or not??

Thanks
John

Posted 16-Dec-13 1:07am

Member 10408451

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5 solutions

Solution 1

C#

if (commonMsgId.IndexOf(fieldFromDB2) > 0)
      {
          //string exists in list
      }
      else {
          //string does not exists in list
      }

Posted 16-Dec-13 1:18am

sankarsan parida

Comments

[no name] 16-Dec-13 7:18am

>= ?

Solution 4

Add this namespace :

C#

using System.Collections.Generic;

Try like below :

C#

if (commonMsgId.Contains(fieldFromDB2))
{
    // string contains
}
else
{
  // not contains
}

Posted 16-Dec-13 1:30am

Karthik_Mahalingam

Solution 6

C#

string fieldFromDB2 = "one";
List<string> commonMsgId = new List<string>() { "one", "three", };
bool areAllInList = commonMsgId.Contains(fieldFromDB2)

Posted 16-Dec-13 1:39am

Vivekh RF

Updated 16-Dec-13 1:40am

v2

Solution 2

Try the given below way -

C#

List<string> search = commonMsgId.FindAll(x => x == fieldFromDB2);</string>

Posted 16-Dec-13 1:19am

Madhu Nair

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sujan thapa magar · Accepted Answer · 2013-12-16T01:31:00

''NOTE my Engli
sh is bad O.o

'from your question i assume this
dude, you have to use for loop to check all the string in the list.

void runData(){

string a;
List listStr=new List();
listStr.add("apple");
listStr.add("ball");
listStr.add("cat");
listStr.add("donkey");
listStr.add("elephant");

///Checking the data in the list

a="cat";

for(int i=0;i<=listStr.count-1;i++){

if(a==listStr[i]){
//Do something

//
}
else{
//Do something
}

}