要在Angular应用中使用ngx-datatable进行服务器端过滤，可以按照以下步骤进行操作：

1. 首先，安装ngx-datatable和其他必要的依赖项。可以使用以下命令进行安装：

npm install @swimlane/ngx-datatable rxjs-compat --save

2. 在Angular模块中导入ngx-datatable模块和其他必要的模块。例如，在app.module.ts文件中导入以下模块：

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { HttpClientModule } from '@angular/common/http';
import { NgxDatatableModule } from '@swimlane/ngx-datatable';

import { AppComponent } from './app.component';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    HttpClientModule,
    NgxDatatableModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

3. 在组件模板中使用ngx-datatable组件，并设置服务器端过滤。

4. 在组件类中实现服务器端过滤的逻辑。可以使用HttpClient库从服务器获取数据，并在接收到的数据中执行过滤操作。

import { Component } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html'
})
export class AppComponent {
  myData = [];
  totalRecords = 0;
  pageSize = 10;
  loading = false;
  selected = [];

  constructor(private http: HttpClient) { }

  ngOnInit() {
    this.getData();
  }

  getData() {
    this.loading = true;
    // Replace the URL with your server API endpoint
    this.http.get('https://example.com/api/data').subscribe((response: any) => {
      this.myData = response.data;
      this.totalRecords = response.totalRecords;
      this.loading = false;
    });
  }

  onPage(pageInfo) {
    // Update the page size and fetch data from the server
    this.pageSize = pageInfo.pageSize;
    this.getData();
  }

  onSort(event) {
    // Update the sort criteria and fetch data from the server
    const sortColumn = event.sorts[0].prop;
    const sortDirection = event.sorts[0].dir;
    // Replace the URL with your server API endpoint, passing the sort criteria as query parameters
    this.http.get(`https://example.com/api/data?sortColumn=${sortColumn}&sortDirection=${sortDirection}`).subscribe((response: any) => {
      this.myData = response.data;
      this.loading = false;
    });
  }

  onActivate(event) {
    // Handle row selection logic here
    // For example, update the selected array
    this.selected = [event.row];
  }

  getRowId(row) {
    // Return a unique identifier for each row
    // For example, the row's ID field
    return row.id;
  }

  getRowClass(row) {
    // Return a CSS class for each row
    // For example, highlight rows based on a condition
    return {
      'highlight': row.age > 30
    };
  }
}

注意替换示例代码中