How to pass value of selectedownerlevel from angular to web api when action post ASP.NET core 3.1 ?

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Typecasting

C#7.0

ASP.NET-Core

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I work on asp.net core 3.1 web api server side

and angular 7 client side

I work on page make upload to single file and it is ok working but when try to pass Number flag with file uploaded

I face issue I can't pass value of variable selectedOwnerLevel from angular 7 to web api

selectedOwnerLevel: number = 1;

suppose selectedOwnerLevel is have value 1

so How to pass value 1 to web api

on angular 7 client side

<pre>public uploadFile = (files,selectowner) => {  
     
  const formData = new FormData();  
    
  formData.append('file', this.fileToUpload,this.fileToUpload.name);  
   
 console.log(this.selectedOwnerLevel);  // it have here 5
 if(this.selectedOwnerLevel==1)  
 {  
 this.http.post('http://localhost:61265/api/DeliverySys/', formData,{ responseType: 'blob' })  
    .subscribe((response: Blob) => saveAs(response, this.fileToUpload.name + '.xlsx'));  
 }  
       
}

on html :

<div class="form-group">    
     <label for="file">Choose File</label>    
     <input type="file"    
            id="file"    
            (change)="handleFileInput($event.target.files)">    
            <button type="button" class="btn btn-success" (click)="uploadFile(files,this.selectedOwnerLevel)">Upload File</button>  
 </div>

on server side web api

[HttpPost, DisableRequestSizeLimit]  
        public IActionResult Upload(int selectedOwnerLevel)  
        {  
            try  
            {  
                var DisplayFileName = Request.Form.Files[0];  
                string fileName = DisplayFileName.FileName.Replace(".xlsx", "-") + Guid.NewGuid().ToString() + ".xlsx";  
  
            }  
            catch (Exception ex)  
            {  
                return StatusCode(500, $"Internal server error: {ex}");  
            }

when debug value of selectedOwnerLevel it display as 0

so please How to display as actual value 1 on angular 7 ?

when do consol.log (this.selectedOwnerLevel) it give me 1 on image below

but it display 0

so How to solve issue please ?

What I have tried:

formData.append("selectedOwner", this.selectedOwnerLevel);