如何在角度7中添加snakbar函数

我有一张6列的垫子桌。在第5列中,它显示作业的状态,即已完成、正在运行或挂起。 我创建了两个按钮,即停止和重新运行。 我想要一个snakbar通知当用户点击停止按钮时,作业应该停止执行,用户得到一个snakbar通知。 同样,如果用户单击重新运行按钮,那么snakbar应该显示一条消息。

我已经创建了一个示例 stackblitz here.

HTML代码:

<div class="main-content">
<mat-toolbar>
    <mat-progress-bar
        mode="indeterminate"
        class="mat-progress-bar"
        color ="primary"
    >
    </mat-progress-bar>
    &nbsp;&nbsp;
    <button
    mat-icon-button
    (click)="stop_exec_job()"
    matTooltip="Stop Executing the Job"
>
    <!-- Edit icon for row -->
    <i class="material-icons" style="color:red"> stop </i>
</button>

</mat-toolbar>

<div class="card">
    <div class="card-header">
        <h5 class="title">Job Execution Stats</h5>
    </div>

    <mat-table [dataSource]="jobExecutionStat">
        <!-- Id Column -->
        <ng-container matColumnDef="id">
            <mat-header-cell *matHeaderCellDef> ID </mat-header-cell>
            <mat-cell *matCellDef="let element">{{ element.id }} </mat-cell>
        </ng-container>

        <ng-container matColumnDef="exec_date">
            <mat-header-cell *matHeaderCellDef>
                Execution Date
            </mat-header-cell>
            <mat-cell *matCellDef="let element"
                >{{ element.exec_date }}
            </mat-cell>
        </ng-container>

        <!-- Weight Column -->
        <ng-container matColumnDef="curr_time_period">
            <mat-header-cell *matHeaderCellDef>
                Current Time Period
            </mat-header-cell>
            <mat-cell *matCellDef="let element"
                >{{ element.curr_time_period }}
            </mat-cell>
        </ng-container>

        <!-- Symbol Column -->
        <ng-container matColumnDef="prev_time_period">
            <mat-header-cell *matHeaderCellDef>
                Previous Time Period
            </mat-header-cell>
            <mat-cell *matCellDef="let element"
                >{{ element.prev_time_period }}
            </mat-cell>
        </ng-container>

        <ng-container matColumnDef="status">
            <mat-header-cell *matHeaderCellDef> Status </mat-header-cell>
            <mat-cell *matCellDef="let element"
                >{{ element.status }}
            </mat-cell>
        </ng-container>

        <ng-container matColumnDef="actions">
            <mat-header-cell *matHeaderCellDef> </mat-header-cell>
            <mat-cell *matCellDef="let element; let index = index">
                <button
                    mat-icon-button
                    (click)="stop_exec_job()"
                    matTooltip="Stop Executing the Job"
                >
                    <!-- Edit icon for row -->
                    <i class="material-icons" style="color:red"> stop </i>
                </button>
                <!-- Delete icon for row -->
                <button
                    class="stop_btn"
                    mat-icon-button
                    color="#b71c1c"
                    (click)="re_run_job()"
                    matTooltip="Re-Run the Job"
                >
                    <i class="material-icons" style="color:green">
                        cached
                    </i>
                </button>
            </mat-cell>
        </ng-container>

        <mat-header-row
            *matHeaderRowDef="jobExecStatDisplayedColumns"
        ></mat-header-row>
        <mat-row *matRowDef="let row; columns: jobExecStatDisplayedColumns">
        </mat-row>
    </mat-table>
</div>

手写体代码:

import { Component, OnInit } from "@angular/core";
import { MatTableDataSource } from "@angular/material";
import { GlobalAppSateService } from '../../services/globalAppSate.service';
import { DataService } from '../../services/data.service';
import { SnakBarComponent } from '../custom-components/snak-bar/snak- 
bar.component';
@Component({
selector: "app-job-execution-screen",
templateUrl: "./job-execution-screen.component.html",
styleUrls: ["./job-execution-screen.component.scss"]
})
export class JobExecutionScreenComponent implements OnInit {
stop_btn: boolean = true;
re_run_btn: boolean = true;


jobExecStatDisplayedColumns = [
    "id",
    "exec_date",
    "prev_time_period",
    "curr_time_period",
    "status",
    "actions"
];

jobExecutionStat = new MatTableDataSource<Element>(ELEMENT_DATA);
constructor(private dataService: DataService, public globalAppSateService: 
GlobalAppSateService, private snakbar: SnakBarComponent ) {

}
ngOnInit() {
    const project = JSON.parse(this.dataService.getObject("project"));
    if (project != null) {
        this.globalAppSateService.onMessage(project);
    }
}


stop_exec_job() {

}
re_run_job() {

}
}
const ELEMENT_DATA: Element[] = [
{
    id: 1,
    exec_date: "17-01-2016",
    prev_time_period: "2016-04,2016-05,2016-06",
    curr_time_period: "2016-08",
    status: "Completed"
},
{
    id: 2,
    exec_date: "17-01-2017",
    prev_time_period: "2017-04,2017-05,2017-06",
    curr_time_period: "2017-08",
    status: "Running"
},
{
    id: 3,
    exec_date: "27-07-2017",
    prev_time_period: "2017-45,2017-46,2017-47",
    curr_time_period: "2018-01,2018-02",
    status: "Pending"
},
{
    id: 4,
    exec_date: "17-10-2018",
    prev_time_period: "2017-30,2017-31,2017-32",
    curr_time_period: "2018-01,2018-02",
    status: "Completed"
},
{
    id: 5,
    exec_date: "21-01-2018",
    prev_time_period: "2016-01,2016-02,2016-03,2016-04",
    curr_time_period: "2016-52",
    status: "Pending"
},
{
    id: 6,
    exec_date: "17-01-2018",
    prev_time_period: "2017-31,2017-32,2017-33,2017-34",
    curr_time_period: "2017-52",
    status: "Running"
}
];
export interface Element {
id: number;
exec_date: string;
prev_time_period: string;
curr_time_period: string;
status: string;
}

出于某种原因,stop和cached是图标,在我的Visual Studio中,我可以看到图标,但在stackblitz中,我无法将它们转换为图标。 只供参考,红色停止,绿色缓存重新运行