public class My_2nd_Api {
    
    Public static void Insert_Records(){
   
        
        List<Opportunity> oppbatch=[select id,name,stagename, (select id,name from OpportunityLineItems), (Select contact.firstname,contact.lastname,contact.Email,contact.Phone from OpportunityContactRoles) from Opportunity];
        system.debug('oppbatch List query.. '+oppbatch);
        
List<OppWrapper> oppWrapperVarList = new List<OppWrapper>();
for(Opportunity opp : oppbatch) 
{
 system.debug(opp.OpportunityLineItems);
 OppWrapper oppwrappervar= new OppWrapper(opp.name,opp.StageName,opp.Edition__r.name,opp.Sub_Allocation_Name__r.name,opp.Account.name,opp.Account.Website,                                         opp.Account.BillingCountry,opp.Account.BillingState,opp.Account.BillingCity,opp.Account.BillingStreet,
                                         opp.Account.BillingPostalcode);         
   
    for(OpportunityLineItem li : opp.OpportunityLineItems)
    {    
        oppwrappervar (li.Unique_id__c,li.Product_Sub_Category_New__c,li.Stand_Number_s__c,li.Hall_s__c,li.Type_of_Stand__c,li.Stand_Depth__c,
                       li.Stand_Width__c,li.Contractual_Sq_M__c);
    }
   /* for(OpportunityContactRole ocr : opp.OpportunityContactRoles)
    {
        co.Ocr_Id__c =ocr.id;
        co.Ocr_Name__c=ocr.contact.name;
        co.Ocr_First_Name__c=ocr.contact.firstname;
        co.Ocr_Last_Name__c=ocr.contact.lastname;
        co.Ocr_contactEmail__c=ocr.contact.Email;
        co.Ocr_contactPhone__c=ocr.contact.Phone;
        co.Ocr_Salutation__c=ocr.contact.Salutation;
    }*/
    
  oppWrapperVarList.add(oppwrappervar);
//OppWrapper oppwrappervar=new OppWrapper(oppbtch.Edition_Name__c,oppbtch.Opportunity_Id__c,oppbtch.Opportunity_Name__c,oppbtch.Opportunity_Stage__c,oppbtch.Stand_No__c,oppbtch.Banner_name__c);
//oppWrapperVarList.add(oppwrappervar);
}
 string jsonbody=Json.serialize(oppWrapperVarList);
        system.debug('Json body---->'+jsonbody);
        
        Http http = new Http();
        HttpRequest request = new HttpRequest();
        //request.setEndpoint('http://fpdatamap.salesforceoutsourcing.in/api/FPDatas');
        request.setEndpoint('http://sfdata.iqratechnology.com/api/sf_data');

        request.setMethod('POST');
        request.setHeader('Content-Type','application/json');
        //request.setHeader('Content-Type','multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW');
        //request.setHeader('Authorization','Bearer '+ AuthorizationToken);
//request.setBody('[{ "RecordId": "456","RecordName": "moosa traders pvt ltd / The Big 5 Construct Egypt 2018 /  / 093061123", "EventName": "a2JD0000001ns6uMAA U", "RecordStage": "Test Stage Amjad","BannerName": "Test Banner Amjad","StandNo": "Test Stand Amjad"}]');
        request.setBody(jsonbody);
        
       HttpResponse response = http.send(request);
        system.debug('Response body '+ response.getBody());
if (response.getStatusCode() != 201) {
    System.debug('The status code returned was not expected: ' +
        response.getStatusCode() + ' ' + response.getStatus());
} else {
    System.debug(response.getBody());
}
        
        
    }
    
    public class OppWrapper
    {
        public String SFDC_RecordID {get;set;}
        public String SFDC_RecordName {get;set;}
        public String SFDC_RecordStage {get;set;}
        public String SFDC_EventName {get;set;}
        public String Stan_Sub_Allocation_Name {get;set;}
        public String Acount_Long_Name {get;set;}
        public String Web_Site {get;set;}
        public String Country {get;set;}
        public String Country_State {get;set;}
        public String City {get;set;}
        public String Street {get;set;}
        public String Post_code {get;set;}
        public String SFDC_Record_Unique_ID {get;set;}
        public String Product_Subcategory {get;set;}
        public String Stand_no {get;set;}
        public String Hall {get;set;}
        public String Type_of_Stand {get;set;}
        public Decimal Height {get;set;}
        public Decimal Width {get;set;}
        public Decimal Contractual_Sq_M {get;set;}
        public OppWrapper(String SFDC_RecordID,String SFDC_RecordName,String SFDC_RecordStage,String SFDC_EventName,String Stan_Sub_Allocation_Name,
                          String Acount_Long_Name,String Web_Site,String Country,String Country_State,String City,String Street,String Post_code,
                          String SFDC_Record_Unique_ID,String Product_Subcategory,String Stand_no,String Hall,String Type_of_Stand,Decimal Height,
                          Decimal Width,Decimal Contractual_Sq_M)
        {
            this.SFDC_RecordID =SFDC_RecordID;
            this.SFDC_RecordName =SFDC_RecordName;
            this.SFDC_RecordStage =SFDC_RecordStage;
            this.SFDC_EventName=SFDC_EventName;
            this.Stan_Sub_Allocation_Name=Stan_Sub_Allocation_Name;
            this.Acount_Long_Name=Acount_Long_Name;
            this.Web_Site=Web_Site;
            this.Country=Country;
            this.Country_State=Country_State;
            this.City=City;
            this.Street=Street;
            this.Post_code=Post_code;
            this.SFDC_Record_Unique_ID=SFDC_Record_Unique_ID;
            this.Product_Subcategory=Product_Subcategory;
            this.Stand_no=Stand_no;
            this.Hall=Hall;
            this.Type_of_Stand=Type_of_Stand;
            this.Height=Height;
            this.Width=Width;
            this.Contractual_Sq_M=Contractual_Sq_M;
            
            
            
        }
    }
    
}


Getting error on bold line error is :-

Line 13 : Constructor not defined: [My_2nd_Api.OppWrapper].<Constructor>(String, String, String, String, String, String, String, String, String, String, String)
Line 19:  Method does not exist or incorrect signature: void oppwrappervar(String, String, String, String, Id, Decimal, Decimal, Decimal) from the type My_2nd_Api