Angular Material – 将值传递给单选按钮组

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英文:

Angular Material - passing value to radio group

问题

"mat-radio-group" 中传递值为什么不起作用?这两个按钮都没有被选中。但如果我在 "mat-radio-group" 中明确使用 "value="2"",一切都正常。

类内的 TypeScript:

radioValue = 2;

HTML:

<mat-radio-group [value]="radioValue">
    <mat-radio-button class="mr-2" value="1">男</mat-radio-button>
    <mat-radio-button value="2">女</mat-radio-button>
</mat-radio-group>
英文:

Why passing the value to mat-radio-group doesn't work? Any of these two buttons is checked. But if I explicitly use value=&quot;2&quot; in mat-radio-group everything works fine.

TS inside class

 radioValue = 2;

HTML

&lt;mat-radio-group [value]=&quot;radioValue&quot;&gt;
        &lt;mat-radio-button class=&quot;mr-2&quot; value=&quot;1&quot;&gt;Male&lt;/mat-radio-button&gt;
        &lt;mat-radio-button value=&quot;2&quot;&gt;Female&lt;/mat-radio-button&gt;
    &lt;/mat-radio-group&gt;

答案1

得分: 1

问题与数据类型有关,您正在合并stringnumber。请按照以下方式更改您的模板(还要在mat-radio-button中使用[value]):

<mat-radio-group [value]="radioValue">
    <mat-radio-button class="mr-2" [value]="1">男</mat-radio-button>
    <mat-radio-button [value]="2">女</mat-radio-button>
</mat-radio-group>
英文:

The problem is related to the data type, you're merging string and number. Change your template as follows (also use [value] with mat-radio-button):

&lt;mat-radio-group [value]=&quot;radioValue&quot;&gt;
    &lt;mat-radio-button class=&quot;mr-2&quot; [value]=&quot;1&quot;&gt;Male&lt;/mat-radio-button&gt;
    &lt;mat-radio-button [value]=&quot;2&quot;&gt;Female&lt;/mat-radio-button&gt;
&lt;/mat-radio-group&gt; 

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  • 本文由 发表于 2020年1月3日 15:41:26
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