Question

我有一个Angular组件方法，该方法应该将数据传递给c＃控制器。我能够将数据从控制器获取到Angular中，但是出于某种原因，将数据发送到控制器不会返回任何内容，并且在c＃端或Angular上都不会出错。我在做什么错了？

组件

import { GcUser } from '../greencard/gcuser';
import { Component, Input, SimpleChanges } from '@angular/core'; 
import { HttpClient, HttpHeaders } from '@angular/common/http';
import { FormControl,FormGroup,Validators } from '@angular/forms';
import { Observable, of } from 'rxjs'; 
import { GreencardComponent } from '../greencard/greencard.component';
import { catchError, map, tap } from 'rxjs/operators'; 

export class UserDetailComponent { 

httpOptions = {
  headers: new HttpHeaders({
    'Content-Type':  'application/json'
  })
};

  constructor(  private http: HttpClient) { 
  } 

  updateUser(x:string): Observable<{}>{ 
    //this.http.post('http://localhost:52008/GreenCard/AngAddUser', {u:JSON.stringify(x)}, this.httpOptions );
    return this.http.get('http://localhost:52008/GreenCard/AngAddUser?u='+JSON.stringify(x), this.httpOptions )
    .pipe(
      catchError(this.handleError('updateUser', x))
    );
  }

C＃控制器方法

[HttpGet]
public void AngAddUser(string u)
{
    throw new Exception(u);
}

Answer 1

我的角度组件需要订阅结果，否则将永远不会发送请求。我为此做完了：

#pragma mark - Init

- (instancetype)initWithFrame:(CGRect)frame textContainer:(nullable NSTextContainer *)textContainer
{
    self = [super initWithFrame:frame textContainer:textContainer];
    if (self) {
        [self commonInit];
    }
    return self;
}

- (instancetype)initWithCoder:(NSCoder *)aDecoder
{
    self = [super initWithCoder:aDecoder];
    if (self) {
        [self commonInit];
    }
    return self;
}

- (void)commonInit
{
    // Try to use max width, like UILabel
    [self setContentCompressionResistancePriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisHorizontal];

    // Optional -- Enable / disable scroll & edit ability
    self.editable = YES;
    self.scrollEnabled = YES;

    // Optional -- match padding of UILabel
    self.textContainer.lineFragmentPadding = 0.0;
    self.textContainerInset = UIEdgeInsetsZero;

    // Optional -- for selecting text and links
    self.selectable = YES;
    self.dataDetectorTypes = UIDataDetectorTypeLink | UIDataDetectorTypePhoneNumber | UIDataDetectorTypeAddress;
}

#pragma mark - Layout

- (CGFloat)widthPadding
{
    CGFloat extraWidth = self.textContainer.lineFragmentPadding * 2.0;
    extraWidth +=  self.textContainerInset.left + self.textContainerInset.right;
    if (@available(iOS 11.0, *)) {
        extraWidth += self.adjustedContentInset.left + self.adjustedContentInset.right;
    } else {
        extraWidth += self.contentInset.left + self.contentInset.right;
    }
    return extraWidth;
}

- (CGFloat)heightPadding
{
    CGFloat extraHeight = self.textContainerInset.top + self.textContainerInset.bottom;
    if (@available(iOS 11.0, *)) {
        extraHeight += self.adjustedContentInset.top + self.adjustedContentInset.bottom;
    } else {
        extraHeight += self.contentInset.top + self.contentInset.bottom;
    }
    return extraHeight;
}

- (void)layoutSubviews
{
    [super layoutSubviews];

    // Prevents flashing of frame change
    if (CGSizeEqualToSize(self.bounds.size, self.intrinsicContentSize) == NO) {
        [self invalidateIntrinsicContentSize];
    }

    // Fix offset error from insets & safe area

    CGFloat textWidth = self.bounds.size.width - [self widthPadding];
    CGFloat textHeight = self.bounds.size.height - [self heightPadding];
    if (self.contentSize.width <= textWidth && self.contentSize.height <= textHeight) {

        CGPoint offset = CGPointMake(-self.contentInset.left, -self.contentInset.top);
        if (@available(iOS 11.0, *)) {
            offset = CGPointMake(-self.adjustedContentInset.left, -self.adjustedContentInset.top);
        }
        if (CGPointEqualToPoint(self.contentOffset, offset) == NO) {
            self.contentOffset = offset;
        }
    }
}

- (CGSize)intrinsicContentSize
{
    if (self.attributedText.length == 0) {
        return CGSizeMake(UIViewNoIntrinsicMetric, UIViewNoIntrinsicMetric);
    }

    CGRect rect = [self.attributedText boundingRectWithSize:CGSizeMake(self.bounds.size.width - [self widthPadding], CGFLOAT_MAX)
                                                    options:NSStringDrawingUsesLineFragmentOrigin
                                                    context:nil];

    return CGSizeMake(ceil(rect.size.width + [self widthPadding]),
                      ceil(rect.size.height + [self heightPadding]));
}

从Angular传递数据永远不会到达C＃控制器

1 个答案: