Question

当我打开角度材料对话框时，我会向对话框发送一些数据

在对话框组件上也是如此我创建自定义验证以检查该值是大于还是小于，但是我不断收到错误消息，指出属性未定义

这是我的代码

  constructor(@Inject(MAT_DIALOG_DATA) public data: VendorDataMaster,
  private fb: FormBuilder,
  public usd: UserdetailsService ) { }

this.validateFormVendor = this.fb.group({
      InvoiceAmountcontrol: [ this.data.InvoiceAmount , [ Validators.required, this.ToleranceValidator] ],
      NoInvoicecontrol: [ this.data.NoInvoice, [ Validators.required ] ],
      DateInvoicecontrol: [ this.data.DateInvoice, [ Validators.required ] ],
      NoFakturPajakcontrol: [ this.data.NoFakturPajak, [ Validators.required ] ],
      DateFakturPajakcontrol: [ this.data.DateFakturPajak, [ Validators.required ] ],
      Statuscontrol : [ {value:this.data.StatusInv, disabled: true} ]
    });
  }
  ToleranceValidator(control: AbstractControl) {
// this is when the data is undifiend
      console.log(this.data.AmountGR)
      if (parseInt(control.value) >  parseInt(this.data.AmountGR) * 1) {
        return { ToleranceRange : true };
      }
      return null;
  }
  public hasError = (controlName: string, errorName: string) =>{
    return this.validateFormVendor.controls[controlName].hasError(errorName);
  }

我猜ngif的启动速度比承包商快，但我不知道会发生什么

我只能尝试使用try catch来解决问题，而且我将结果放在导出的组件上，这样我就可以在对话框组件上使用它，但是仍然无法防御

Answer 1

将ToleranceValidator设置为async验证器，如下所示。而不是将其添加到数组的第二个值中，而是将其添加到第三位。

this.validateFormVendor = this.fb.group({
      InvoiceAmountcontrol: [ this.data.InvoiceAmount , [ Validators.required], this.ToleranceValidator ],
      NoInvoicecontrol: [ this.data.NoInvoice, [ Validators.required ] ],
      DateInvoicecontrol: [ this.data.DateInvoice, [ Validators.required ] ],
      NoFakturPajakcontrol: [ this.data.NoFakturPajak, [ Validators.required ] ],
      DateFakturPajakcontrol: [ this.data.DateFakturPajak, [ Validators.required ] ],
      Statuscontrol : [ {value:this.data.StatusInv, disabled: true} ]
    });
  }

Answer 2

使用绑定

this.validateFormVendor = this.fb.group({
      InvoiceAmountcontrol: [ '' , [ Validators.required, this.ToleranceValidator.bind(this)] ],
      NoInvoicecontrol: ['', [ Validators.required ] ],
      DateInvoicecontrol: [ '', [ Validators.required ] ],
      NoFakturPajakcontrol: [ '', [ Validators.required ] ],
      DateFakturPajakcontrol: [ '', [ Validators.required ] ],
      Statuscontrol : [ {value:'', disabled: true} ]
    });
  }

来自外部角度7的值的抽象控制

2 个答案: