dataTable Primeng和Angular 4中的选定项找到索引-1

Question

Hi everyone i want to select item for delete and edit, i don't use CRUD dataTable of Primeng i use ng-template and column

So My code like this

 <p-dataTable [value]="users" selectionMode="single" [(selection)]="selectedUser" (onRowSelect)="onRowSelect($event)" [paginator]="true" rows="15" [responsive]="true">
    <p-column field="nom" header="Nom" [sortable]="true"></p-column>
    <p-column field="email" header="Email" [sortable]="true"></p-column>
    <p-column field="brand" header="Modfier" [sortable]="true">
            <ng-template let-col let-user="rowData" pTemplate="body">
                <button type="button" pButton (click)="editUser(user)" tooltipPosition="top" icon="fa fa-pencil"></button>
            </ng-template>

    </p-column>
    <p-column field="color" header="Supprimer" [sortable]="true">
        <ng-template let-col let-user="rowData" pTemplate="body">
            <button type="button" pButton (click)="deleteUser(user)" tooltipPosition="top" icon=" fa fa-trash"></button>
        </ng-template>
    </p-column>
</p-dataTable>

and when i click to delete user i need first the index so i call this function in component

findSelectedUserIndex(): number {
        return this.users.indexOf(this.selectedUser);
 }

but when i click in deleteUser

 deleteUser(user:User){
        console.log(user);
        console.log("here",this.findSelectedUserIndex());
    }

and this functions to get rowselected

 onRowSelect(event) {
        this.newUser = false;
        this.user = this.cloneUser(event.data);
        this.displayDialog = true;
    }

    cloneUser(c: User): User {
        let usr = new User();
        for(let prop in c) {
            usr[prop] = c[prop];
        }
        return usr;
    }

i get user with all data
but in this.findSelectedUserIndex() i get -1
so anyone can help me to resolve this issue and thanks

Answer 1

Add rowIndex to your ng-template and pass it when delete is clicked as

<p-column field="color" header="Supprimer" [sortable]="true">
        <ng-template let-col let-user="rowData" let-i="rowIndex" pTemplate="body">
            <button type="button" pButton (click)="deleteUser(user,i)" tooltipPosition="top" icon=" fa fa-trash"></button>
        </ng-template>
    </p-column>

Your method should be as

deleteUser(user:User,index:number){
        console.log(user);
        console.log("here",index);
    }