Question

我收到以下错误：错误错误：必须为名称为'id'的表单控件提供一个值。即使我已经提供了相同的价值，这是我的打字稿代码

void main()
{    
    char cmd[255]; // this allocate a character array to store the command in
    for(;;)
    {
        fgets(cmd,255,stdin); // get the characters from stdin and store them in the cmd character array with a max length of 255
        if ( strncmp(cmd, "CD ", 3) == 0 ) // check if the first three characters are "CD "
        {
            SetCurrentDirectory(&cmd[3]); // pass the string not including the first 3 charcters, which should be "CD "
        }
        else
        {
            system(cmd);
        }
    }
}

这是我的html代码：-

import { Component, OnInit,Inject } from '@angular/core';
import {MatDialog,MatDialogRef,MAT_DIALOG_DATA} from '@angular/material';
import {FormGroup,FormBuilder,Validators} from '@angular/forms';
import {AdminService} from '../../services/admin.service';
@Component({
  selector: 'app-subcategory-modal',
  templateUrl: './subcategory-modal.component.html',
  styleUrls: ['./subcategory-modal.component.css']
})
export class SubcategoryModalComponent implements OnInit {
   subcategoryForm:FormGroup;
   category:any;
  constructor(public subCategoryDialogref:MatDialogRef<SubcategoryModalComponent>,@Inject(MAT_DIALOG_DATA)public data:string,private formBuilder:FormBuilder,private service:AdminService)
   {
      this.generateCategory();
   }

  ngOnInit() {
    this.createForm();
    this.generateSubcategory(this.data);

  }
   createForm()
   {
     this.subcategoryForm=this.formBuilder.group({
       id:[null,Validators.required],
       subcategoryName:[null,Validators.required],
       category:[null,Validators.required]
     });
   }
   generateSubcategory(data)
   {

     this.service.getSubcategorys(data).subscribe(res=>{
         console.log(res.result);
     this.subcategoryForm.setValue({
       id:res.result.Name
     });
     },err=>{

     });
   }
   generateCategory()
   {
     this.service.getCategory().subscribe(res=>{
       this.category=res;
     });
   }
}

有人可以告诉我我要去哪里错吗？以及为什么这个错误不断发生？

Answer 1

由于只想更改控件id的值，因此应使用patchValue而不是setValue方法来修改该formControl的值。

this.subcategoryForm.patchValue({
       id:res.result.Name
});

如果要使用setValue方法，可以从formControl id调用它：

this.subcategoryForm.controls['id'].setValue(res.result.Name);

给定错误的类型脚本必须提供formcontrol名称id的值

1 个答案: