为每一行生成下拉列表表单控件时，Angular 7 和 Angular Material 表带有数据源错误 [英] Angular 7 and Angular Material table with data source error when generating drop list form control for each row

问题描述

基于此问题在堆栈上，我需要为从角材料表dataSource生成的每一行绑定一个下拉列表.下拉列表应自动选择相应的值，作为其他值.

Based on this question on stack, I need to bind a drop down list, for each row generated from angular material table dataSource. The drop down list should select automatically the correspondent value, as other values.

这是表:

<form [formGroup]="formGroup">
    <table mat-table [dataSource]="dataSource" matSort>


      <!-- <ng-container matColumnDef="ind_id">
        <th mat-header-cell *matHeaderCellDef> Ind. ID </th>
        <td mat-cell *matCellDef="let element"> {{element.iid}} </td>
      </ng-container> -->


      <ng-container matColumnDef="name">
        <th mat-header-cell *matHeaderCellDef> Name </th>
        <td mat-cell *matCellDef="let element" [matTooltip]="element.iid" matTooltipPosition="left"> <b>{{element.far}} {{element.lar}}</b> </td>
        
      </ng-container>


      <ng-container matColumnDef="head_hh">
        <th mat-header-cell *matHeaderCellDef> Head Of HH </th>
        <td mat-cell *matCellDef="let element"> {{element.hhead}} </td>
      </ng-container>


      <ng-container matColumnDef="fr">
        <th mat-header-cell *matHeaderCellDef> Family Rel. </th>
        <td mat-cell *matCellDef="let element; let index = index;" [formGroupName]="index">
            <mat-form-field color="warn" appearance="outline">
                <mat-label>Family Relation</mat-label>
                <mat-select id="family_relation" formControlName="fr" placeholder="Family Relation">                 
                      <mat-option *ngFor="let familyRelation of familyRelationArray; let i = index" [value]="frid">
                    {{familyRelation.family_relation_type}}
                  </mat-option>
                </mat-select>
              </mat-form-field>&nbsp;
              {{element.fr}}
        </td>
      </ng-container>

      <ng-container matColumnDef="ms">
        <th mat-header-cell *matHeaderCellDef> Marital Sts. </th>
        <td mat-cell *matCellDef="let element"> {{element.ms}} </td>
      </ng-container>
      <ng-container matColumnDef="status">
        <th mat-header-cell *matHeaderCellDef> Status </th>
        <td mat-cell *matCellDef="let element"> {{element.sts}} </td>
      </ng-container>
      <ng-container matColumnDef="age">
        <th mat-header-cell *matHeaderCellDef mat-sort-header> Age </th>
        <td mat-cell *matCellDef="let element"> {{element.age}} </td>
      </ng-container>

      <tr mat-header-row *matHeaderRowDef="displayedColumns; sticky: true"></tr>
      <tr mat-row *matRowDef="let row; columns: displayedColumns;"></tr>
    </table>
</form>

这是打字稿代码，我根据这个工作生成一个 FormArray stackblitz 来自上面附加的问题:

Here is the typescript code, where I generate a FormArray based on this working stackblitz from the question attached above:

constructor(private fb: FormBuilder, 
    private activatedRoute: ActivatedRoute, 
    private auth: AuthApiService) {
      this.formGroup = this.fb.group({
        'fr': this.createArray()
      })
}

现在对于数组的每个formControl，我需要将数据绑定到下拉列表:

Now for each formControl of the array, I need to bind the data to drop list:

createArray(): FormArray{
    return new FormArray(this.dataSource.data.map(item=> new FormGroup({
      fr: new FormControl(item.frid)
    })));
}

其中frid为下拉列表中每个选中选项的value，fr为用户显示的名称.

Where frid is the value of each selected option of drop list, and fr is the name displayed for user.

我遇到以下错误:

[ts] 类型{}"上不存在属性frid".[2339]

[ts] Property 'frid' does not exist on type '{}'. [2339]

这里是返回数组的片段:

Here a snippet of the returned array:

0: {0: "xyzzz", 1: "xyz", 2: 57073, 3: 2, 4: "Parent", 5:

0: {0: "xyzzz", 1: "xyz", 2: 57073, 3: 2, 4: "Parent", 5:

已婚"，6:活跃"，7:没有"，...}

"Married", 6: "Active", 7: "no",…}

0:xyz"

1:zyz"

2:57073

3:2

4:父母"

5:已婚"

6:主动"

7:不"

8:61

年龄:61

远:xyz"

fr:父母"

弗里德:2

hhead:否"

身份证号:57073

lar:xyz"

毫秒:已婚"

sts:主动"

这是我的stackblitz.

如何在angular material 6 table的每一行数据源中生成表单控件?

How to generate form control in each row of data source in angular material 6 table ?

推荐答案

或者你可以简单地

createArray(): FormArray{
    return new FormArray(this.dataSource.data.map(item=> new FormGroup({
      fr: new FormControl(item['frid'])
    })));
}

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