"Edit / Delete" button for each row & header column is 'Action' in the md-table component

Question

I am quite new in the angular 4 world and I'm trying to add "Edit / Delete" button for each row & header column is 'Action' in the md-table component in Angular Material design with Angular 4. how can I do this? customized header column & buttons for each row. any template available to do this? below is my HTML code.

userinfo.html

<!-- ID Column -->
<ng-container cdkColumnDef="username">
<md-header-cell *cdkHeaderCellDef> User Name </md-header-cell>
<md-cell *cdkCellDef="let row"> {{row.username}} </md-cell>
</ng-container>

<!-- Email Column -->
<ng-container cdkColumnDef="email">
<md-header-cell *cdkHeaderCellDef> Email </md-header-cell>
<md-cell *cdkCellDef="let row"> {{row.email}} </md-cell>
</ng-container>

<!-- First Name Column -->
<ng-container cdkColumnDef="userFirstName">
<md-header-cell *cdkHeaderCellDef> First Name </md-header-cell>
<md-cell *cdkCellDef="let row"> {{row.userFirstName}} </md-cell>
</ng-container>

<!-- Last Name Column -->
<ng-container cdkColumnDef="userLastName">
<md-header-cell *cdkHeaderCellDef> Last Name </md-header-cell>
<md-cell *cdkCellDef="let row" [style.color]="row.color"> {{row.userLastName}} </md-cell>
</ng-container> 

<!-- Phone Column -->
<ng-container cdkColumnDef="userMobile">
<md-header-cell *cdkHeaderCellDef> Phone </md-header-cell>
<md-cell *cdkCellDef="let row" > {{row.userMobile}} </md-cell>
</ng-container> 

<!-- Role Column -->
<ng-container cdkColumnDef="authority">
<md-header-cell > Role </md-header-cell>
<md-cell *cdkCellDef="let row" > {{row.authority}} </md-cell>
</ng-container> 

<!-- Action Column 
<md-header-cell > Action </md-header-cell>
<md-cell  > <button md-raised-button >Edit</button> </md-cell> -->

<md-header-row *cdkHeaderRowDef="displayedColumns"></md-header-row>
<md-row *cdkRowDef="let row; columns: displayedColumns;"></md-row>

Answer 1

You are on the right track, you just need to add an actions item to displayedColumns list;

displayedColumns = ["username","email","userFirstName" ...  ,"actions"];

and:

<ng-container cdkColumnDef="actions">
    <md-header-cell > Actions </md-header-cell>
    <md-cell *cdkCellDef="let row" >
         <button md-raised-button >Edit</button> 
    </md-cell>
</ng-container>