React - 如何在 react-select 中设置默认值 [英] React - How to set default value in react-select

问题描述

我在我的应用程序中使用了 react-select 来显示选择框.下面是我选择的代码.

I used react-select in my application for showing select box. below is code of my select.

<Select
       className="custom-form-control mb-2"
       name="organization_options"
       options={this.organizationOptions()}
       placeholder={false}
       onChange={this.handleChange.bind(this)}
       value={selectedValue === "" ? this.organizationOptions()[0] : selectedValue}
/>

以下是我在选择框中已有的选项

Below are the options i already have in select box

0: {value: "62", label: "Dfdf"}
1: {value: "128", label: "Dfdfdsf"}
2: {value: "151", label: "Fgfdgdfh"}
3: {value: "121", label: "Hhhfas"}
4: {value: "55", label: "My Sensor_56"}
5: {value: "13", label: "New Org"}
6: {value: "44", label: "Org 2"}
7: {value: "148", label: "Testing App"}

我有来自查询字符串的值，如 value="55"，如果该值存在，我想在选择框中显示所选值.

I have the value from query string like value="55", if the value is present i want to show that selected value in select box .

我尝试了两种不同的方式，如下所示，

I tried in 2 different ways which are shown as below code ,

1)

selectedValue='55'
defaultValue={this.organizationOptions().find(op => {
   return op.value === selectedValue
})}

2

defaultValue={{value: "55", label: "My Sensor_56"}}

但没有人工作，有人能告诉我如何设置 defaultV如果我没有选择值，是否已经有或不显示默认值?

But no one works, Can somebody tell me How can i set defaultV alue if already have or don't show default value if i don't have selected value ?

推荐答案

这里是我们在组织选项中找到的默认值，并将其作为值传递给 Select:

Here default value we are finding out in organization options and pass it as value in Select:

import React from 'react';
import Select from 'react-select';

export default class App extends React.Component {
  organizationOptions = () => {
    return [
       {value: "62", label: "Dfdf"},
       {value: "128", label: "Dfdfdsf"},
       {value: "151", label: "Fgfdgdfh"},
       {value: "121", label: "Hhhfas"},
       {value: "55", label: "My Sensor_56"},
       {value: "13", label: "New Org"},
       {value: "44", label: "Org 2"},
      {value: "148", label: "Testing App"}
    ]
  }

  render() {
    const selectedValue = "55"
    return (
      <Select
        value={this.organizationOptions().find(op => {
           return op.value === selectedValue
        })}
        onChange={this.handleChange}
        options={this.organizationOptions()}
      />
    );
  }
}

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