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Regarding multiple DropDownList

Mandar Shinde

Mandar Shinde
5y
528
1
Dear All,
I was developing one component using Angular 5 and ASP .Net MVC.
while developing component what I want to do is that I've two dropdown list with me.
 
First one is for  group :
in that I have common group names
which is as follows - 
 
HTML
 
  1. <select class="form-control" name="Group" id="Group" required [value]='itemToEdit.GroupID' (change)="getServiceByGroup(i);">  
  2.   <option disabled value="">Select Groupoption>  
  3.   <option *ngFor='let cc of group' [value]="cc.GroupID">  
  4.      {{cc.GroupName}}  
  5.   option>    
  6. select>    
TypeScript
 
  1. this.commonService.getGroupList().subscribe(data => {  
  2.       this.group = data as string[];  
  3.     });  
And Second is Service :
which contains Service list Related to Group as follows -
 
  1. <select class="form-control" name="Service" id="Service" required [value]='itemToEdit.ServiceID' (change)="getServiceRate(i);">  
  2.     <option value="">Select Serviceoption>  
  3.     <option *ngFor='let cc of service' [value]="cc.ServiceID">   
  4.         {{cc.ServiceName}}  
  5.     option>  
  6. select>  
 
 TypeScript
 
  1. //Filling Service By Selection Of Group  
  2.   getServiceByGroup(index) {  
  3.     this.commonService.getServiceByGroup(index).subscribe(data => {  
  4.       this.service = data;  
  5.     });  
  6.   }  
 
Here it seems look like - 
 
 
 
My problem is that I am creating multiple Group  and Service dropdown using table format in HTML. I am getting different Id for element but when choose Group for first time it will gives me correct output.
I have AddRow() in Typescript which will create row for me in table.
So in next row I have again two dropdown list Group And Service.
When I am Trying To get different Group then it makes effect on both previous Service DropDown and Latest ServiceDropDown.
I get come to know that It happening because of my getServiceByGroup() result.
But I don't know how to overcome on this particular problem.
Please suggest me some easy solutions.
Thanking  You in advance.
 
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