使用 react-bootstrap 获取输入文本的值 [英] Get value of input text with react-bootstrap

问题描述

我尝试在输入文本中获取值，并使用 react-bootstrap 将其添加到文本区域.

I try to get value into a input text and add it to a text area with react-bootstrap.

我知道我必须使用 ReactDOM.findDOMNode 来获取带有 ref 的值.我不明白出了什么问题.

I know I must use ReactDOM.findDOMNode to get value with ref. I don't understand what is wrong.

这是我的代码:

import React from 'react';
import logo from './logo.svg';
import ReactDOM from 'react-dom';
import { InputGroup, FormGroup, FormControl, Button} from 'react-bootstrap';
import './App.css';
class InputMessages extends React.Component {
constructor(props) { 
super(props);
this.handleChange =      this.handleChange.bind(this); 
    this.GetMessage= this.GetMessage.bind(this); 
this.state = {message: ''};
}   
handleChange(event)
{    
this.setState({message: this.GetMessage.value});
}
GetMessage()
{   
return ReactDOM.findDOMNode(this.refs.message     );
 }
 render() {
    var message = this.state.message;
    return(
 <FormGroup > 
 <FormControl
 componentClass="textarea" value={message} />
 <InputGroup> 
 <FormControl type="text" ref='message' /> 
    <InputGroup.Button>
    <Button bsStyle="primary" onClick={this.handleChange}>Send
    </Button>
    </InputGroup.Button> 
    </InputGroup>
    </FormGroup>
    );
   }
   }  
   export default InputMessages;

推荐答案

向表单添加输入引用:

<FormControl inputRef={ref => { this.myInput = ref; }} />

所以现在你得到了这样的价值

so now you get the value like

this.myInput.value

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