如何制作 Lightning Web 组件？答案

【问题标题】：How to make a Lightning Web Components?如何制作 Lightning Web 组件？
【发布时间】：2022-01-17 13:54:52
【问题描述】：

我需要用这个 Apex 类制作一个 Lightning Web 组件，但我不知道如何将数据传递给 JS 和 HTML，以及如何创建该 lwc。我想制作一个 lwc，显示每次使用/调用 lwc 组件时从某个电子邮件收到的每封电子邮件。也许做一个光环组件更好？我不知道。这是代码

public with sharing class Gmail {

public with sharing class GMResponseMessages {
    public Integer resultSizeEstimate;
    public GMThread[] messages;
}
      
public with sharing class GMThread {
    public String id;
    public String threadId;
}
      
public with sharing class GMMessage {
    public String id;
    public String threadId;
    public String[] labelIds;
    public String snippet;
    public String historyId;
    public String internalDate;
    public GMMessagePart payload;
    public String sizeEstimate;
    public String raw;  
}
      
public with sharing class GMMessagePart {
    public String partId;
    public String mimeType;
    public String filename;
    public Header[] headers;
    public GMMessagePartBody[] body;
    public GMMessagePart[] parts;  
}
      
public with sharing class Header {
    public String name;
    public String value;
}
      
public with sharing class GMMessagePartBody {
    public String attachmentId;
    public String superinteger;
    public String data;
}



@AuraEnabled
public static void getGmail_API() {

      //GET https://gmail.googleapis.com/gmail/v1/users/{userId}/messages/{id}

    Http http = new Http();
    HTTPResponse response;
    HttpRequest request;
    String userEmail = 'myemail@gmail.com';
      
    request = new HttpRequest();
    request.setMethod('GET');
    request.setEndpoint('callout:Gmail_API/gmail/v1/users/myemail@gmail.com/messages?q=from:othermail@mail.it');
      
    response = http.send(request); 
    System.debug('START');
    System.debug(response.getStatusCode());
      
    if(response.getStatusCode() == 200) {
    JSONParser parser = JSON.createParser(response.getBody());
    System.debug(parser);
    GMResponseMessages jsonResponse = (GMResponseMessages)JSON.deserialize(response.getBody(), GMResponseMessages.class);
    System.debug(jsonResponse); 
      
    for(GMThread thread: jsonResponse.messages){
        System.debug('THREAD FOR');
        System.debug(thread);
        Http httpMsg = new Http();
        HTTPResponse responseMsg;
        HttpRequest requestMsg;
        requestMsg = new HttpRequest();
        requestMsg.setMethod('GET');
        requestMsg.setEndpoint('callout:Gmail_API/gmail/v1/users/myemail@gmail.com/messages/' + thread.id);
        responseMsg = httpMsg.send(requestMsg); 
        if(responseMsg.getStatusCode() == 200) {
            GMMessage jsonResponseMsg = (GMMessage)JSON.deserialize(responseMsg.getBody(), GMMessage.class);
            System.debug(jsonResponseMsg);
      
        }
    }
      }

}

}

【问题讨论】：

标签： gmail salesforce apex salesforce-lightning lightning

【解决方案1】：

您需要按照documented pathways 在 Lightning Web 组件中调用 Apex 方法。

您可以使用imperative call 或wire method 来完成此操作。由于您的 Apex 方法不带参数，因此很可能采用命令式调用。

【讨论】：