小编Ami*_*mir的帖子

我试图将ASP.NET Core 2.2应用程序部署到运行Ubuntu 18.04的DigitalOcean droplet.我按照官方文件中提供的步骤进行操作. https://dotnet.microsoft.com/download/linux-package-manager/ubuntu18-04/sdk-current.

但是我收到了错误.

Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 dotnet-sdk-2.2 : Depends: aspnetcore-runtime-2.2 (>= 2.2.0) but it is not going to be installed
                  Depends: dotnet-runtime-2.2 (>= 2.2.0) …

连接到服务器时，我一直无法启动传输 'WebSockets': null。

我正在 reactnative 移动应用程序中实现一个简单的聊天。我正在使用 @aspnet/signalr(version-1.1.4) 库。我收到此错误 - 错误：无法启动传输“WebSockets”：空。 在此处查看日志

componentDidMount(){

try {

      const connection = new signalR.HubConnectionBuilder() //Connect to a hub
        .withUrl(baseUrl + `/chatbus`, {
          transport: signalR.HttpTransportType.WebSockets | signalR.HttpTransportType.LongPolling,
          'content-type': 'application/json',
          accessTokenFactory: () => authToken   //for authorization
        })
        .configureLogging(signalR.LogLevel.Debug)
        .build();

      connection.on('NotifySignalR', (ChatObject) => {
        console.log(ChatObject);

      });

      connection.start()
        .then(() => {
          console.log('Chat Connection started.');
          console.log('Now connected, connection ID=' + connection.id);
          this.initalAttemptForChat = true;
          connection.invoke("start");
        })
        .catch(() => {
          this.initalAttemptForChat = false;
          console.log('Error while establishing chatbus connection!');
        });

    } catch …

我看了几个问题和答案,但无法解决我的问题.我的代码如下:

HTML

 <input type="file" id="file" accept="image/*" name="File" (change)="handleFileInput($event.target.files)">
 <button type="button" mat-raised-button color="primary" (click)="uploadFileToActivity()">Upload</button>

零件

  handleFileInput(files: FileList) {
    this.fileToUpload = files.item(0);
  }

  uploadFileToActivity() {

    this._dishAddService.postFile(this.fileToUpload).subscribe(data => {

      }, error => {
        console.log(error);
      });
  }

服务

 postFile(fileToUpload: File): Observable<boolean> {
    const formData: FormData = new FormData();
    formData.append('fileKey', fileToUpload, fileToUpload.name);
    let headers = new Headers({ 'Content-Type': 'application/json' });    
    headers.append('Content-Type', 'multipart/form-data');

    let options = new RequestOptions({ headers: headers, method: 'post' });
    return this.http.post(this.httpRequestUrl + 'api/dish/UploadDishImage', formData, options)
      .map(
        (response => response.json()))
      .catch(CommonFunctionService.handleError);
  }

API …

我正在升级在 Share Point 办公室内运行的 Angular 应用程序。目前 Angular 应用程序使用的是版本 14，在我升级到 Angular 15 后，它工作正常。但是当我升级到 16 后，我就收到以下错误。

TypeError: this._history.replaceState is not a function

打电话时会发生这种情况

 this.router.navigate(['/path_to_component']);

我在这个 SO 帖子上找到了修复。Office.js 使浏览器历史记录功能无效，破坏历史记录使用情况

<script type="text/javascript">
    // Office js deletes window.history.pushState and window.history.replaceState. Cache them and restore them
    window._historyCache = {
        replaceState: window.history.replaceState,
        pushState: window.history.pushState
    };
</script>

<script type="text/javascript" src="https://appsforoffice.microsoft.com/lib/1/hosted/office.js"></script>

<script type="text/javascript">
    // Office js deletes window.history.pushState and window.history.replaceState. Restore them
    window.history.replaceState = window._historyCache.replaceState;
    window.history.pushState = window._historyCache.pushState;
</script>

我不确定升级到 Angular 16 后会发生什么问题，尽管它与 office.js 有关

我正在使用相同版本的office.js。

我已经使用了哈希位置策略。任何人都可以帮助我理解这一点。

我是Angular / material2的新手，我不确定尝试遵循上的文档时会丢失什么sidenav。

在我的AppComponent中，我想显示一个sidenav，并实现如下：

app.component.tss

import {
    NgModule,
    Component
} from '@angular/core';
import {
    MatSidenavModule,
    MatSidenavContent,
    MatSidenav
} from '@angular/material';
import {
    BrowserAnimationsModule
} from '@angular/platform-browser/animations';

@NgModule({
    imports: [
        BrowserAnimationsModule,
        MatSidenav
    ],
    exports: [
        BrowserAnimationsModule,
        MatSidenav
    ]
})
@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {
    title = 'app';
}

app.component.html

<!--The content below is only a placeholder and can be replaced.-->
<mat-sidenav-container>

</mat-sidenav-container>
<div style="text-align:center">
    <h1>
        Welcome to {{ title }}!
    </h1>
    <nav> …

当我将项目推入数组时,项目被推送,但问题是数组中的所有项目都与推送的最后一项相同.

pushspecification() {
        this.specificationSaveDetailList.push(this.specificationsaveDetail);
    }

以下是plunker代码:plunker_Code
在这个plunker示例中,我从下拉列表中选择项目并提供说明并单击"添加"按钮,表中将填充数组项.