小编Ada*_*cki的帖子

ViewData和ViewBag允许您访问从控制器传递的视图中的任何数据.

这两者之间的主要区别在于您访问数据的方式.在ViewBag中,您使用字符串作为键访问数据 - ViewBag ["numbers"]在ViewData中,您使用属性访问数据 - ViewData.numbers.

ViewData示例

CONTROLLER

 var Numbers = new List<int> { 1, 2, 3 };

          ViewData["numbers"] = Numbers;

视图

<ul>
 @foreach (var number in (List<int>)ViewData["numbers"])
 {
     <li>@number</li> 
 }

 </ul>

ViewBag示例

CONTROLLER

 var Numbers = new List<int> { 1, 2, 3 };

         ViewBag.numbers = Numbers;

视图

<ul>

@foreach (var number in ViewBag.numbers)

{
<li>@number</li> 
}

</ul>

Session是另一个非常有用的对象,可以保存任何信息.

例如,当用户登录到系统时,您希望保持其授权级别.

// GetUserAuthorizationLevel - some method that returns int value for user authorization level.

Session["AuthorizationLevel"] = GetUserAuthorizationLevel(userID); …

我在 ses.SendEmail 方法中面临一个奇怪的问题。当我使用测试数据时，一切都会按预期工作，并且电子邮件会发送给我，但是当在 dynamoDB 中添加新条目来触发将发送电子邮件的 lambda 函数时，我得到一个异常：

InvalidParameterValue：域包含控件或空格\nat Request.extractError (/var/runtime/node_modules/aws-sdk/lib/protocol/query.js:50:29)\nat Request.callListeners (/var/runtime/node_modules/aws) -sdk/lib/sequential_executor.js:106:20)\nat Request.emit (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:78:10)\nat Request.emit (/var/runtime /node_modules/aws-sdk/lib/request.js:688:14)\nat Request.transition (/var/runtime/node_modules/aws-sdk/lib/request.js:22:10)\nat AcceptorStateMachine.runTo ( /var/runtime/node_modules/aws-sdk/lib/state_machine.js:14:12)\nat /var/runtime/node_modules/aws-sdk/lib/state_machine.js:26:10\nat 请求。(/var/runtime/node_modules/aws-sdk/lib/request.js:38:9)\nat 请求。(/var/runtime/node_modules/aws-sdk/lib/request.js:690:12)\nat Request.callListeners (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:116:18) { \n代码: 'InvalidParameterValue',\n时间: 2020-08-28T13:09:31.549Z,\nrequestId: '233eb2c8-9097-4aab-884f-ecd20260a473',\nstatusCode: 400,\n可重试: false,\nretryDelay: 38.70417411 485463 \n}

console.log('Loading function');\nvar aws = require('aws-sdk');\nvar ses = new aws.SES({region: 'eu-west-2'});\n\nexports.handler = (event, context) => {\n    //console.log('Received event:', JSON.stringify(event, null, 2));\n    event.Records.forEach((record) => {\n        if(record.eventName == 'INSERT')\n        {\n            console.log(record.eventID);\n            console.log(record.eventName);\n            console.log('DynamoDB Record: %j', record.dynamodb);\n            \n            console.log(record.dynamodb.NewImage.email.S);\n            \n            var email …

我有一个这样定义的模式：

"permissions": {
          "type": "array",
            "properties": {
               "items":
                 {
                   "$ref": "#/definitions/permissionsType"
                 }
            }
        },

和权限类型：

"permissionsType": {
      "type": "string",
      "pattern": "^[a-zA-Z0-9]+(:[a-zA-Z0-9][a-zA-Z0-9-]+)+$"
    },

...

我不确定为什么模式正则表达式被忽略。