[SalesForce] Get value in a variable from selectOptions {Selected option}

How could I catch the value {!items} selected and capture it in a variable? I need a simple line of code.

<apex:pageBlock tabStyle="Account" title="Merge Accounts">
          <apex:pageBlockSection title="Choose Accounts to Merge" collapsible="false">
            <apex:selectList label="Account 1" value="{!accounts}" size="1">
                <apex:selectOptions value="{!items}"/>
            </apex:selectList>
              <!--//[Account to merge]-->
            <apex:selectList label="Account 2" value="{!accounts}" size="1">
                <apex:selectOptions value="{!items}"/>
            </apex:selectList>
        </apex:pageBlockSection>
    </apex:pageBlock>

Here is the methods in controller

public String[] accounts = new String[]{};

    public PageReference test() {
        return null;
    }
    //Here the accounts are invoke
    public List<SelectOption> getItems() 
    {
        List<Account> lstAcc = [select id,name from account limit 10];
        List<SelectOption> options = new List<SelectOption>();

        for(Account acc : lstAcc)
        {
            options.add( new SelectOption( acc.id,acc.Name ));
        }
        return options;
    }
    //Here we get the accounts in getiing them
    public String[] getAccounts() {
        return accounts;
    }
    //Here we set the accounts in setting them
    public void setAccounts(String[] accounts) {
        this.accounts = accounts;
    }

I need to catch the value from selectList in a variable to make validations in a new method.
Thanks in advance.

Best Answer

The value attribute of the apex:selectList tag holds a selected value from the list. You should define an apex variable for that:

public string selectedValue { get; set; }

<apex:selectList label="Account 1" value="{!selectedValue}" size="1">

For more info just read the manual: apex:selectList

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You can't instantiate a List like that using an integer. You don't need to explicitly specify how much items are going into the list when it is created. Instead, just remove the integer:

//Instantiate the list
String[] myArray = new List<String>();

You're logic in your loop seems to be incorrect as well. Specifically, myArray's size will always be 0 when you instantiate it. Change your loop logic to:

for(Integer i=0;i<length;i++) {
   // code
}

You want to generate a List of strings based on the i variable. You will want to change your internal logic to:

//Populate the array
myArray.add('Test ' + i);

// Write value to the debug log
System.debug(myArray[i]);

Finally, you want to return that Array. You need to change your method so the return type is no longer void by changing its signature:

public static String[] generateStringArray(Integer length)

then it is just a matter of returning that array at the end of your method:

return myArray;

This would bring it all together as:

public class StringArrayTest {
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        } //end loop

        return myArray;
    }//end method       
}// end class

Some more info on Arrays and Lists, Loops, and Class methods for future reference.

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