CRM Toast Notification含overrideContent请求报错及解决问询

问题背景 #

我们在实现CRM的Toast Notification JavaScript功能时，使用官方文档中的第一个示例代码可成功向用户发送通知：

var SendAppNotificationRequest = new Example.SendAppNotificationRequest(
    title = "欢迎",
    recipient = "/systemusers(8d585985-e1f4-ed11-8818-0022483d019b)",
    body = "欢迎使用应用通知功能！",
    priority = 200000000,
    iconType = 100000000,
    toastType = 200000000,
);

但使用包含overrideContent元素的第二个示例时，执行出现错误：

var SendAppNotificationRequest = new Example.SendAppNotificationRequest(title = "SLA 已严重超时",
    recipient = "/systemusers(8d585985-e1f4-ed11-8818-0022483d019b)",
    body = "分配给您的记录已严重超出SLA时限。",
    iconType = 100000003,
    toastType = 200000000,
    overrideContent = {
        "@odata.type": "#Microsoft.Dynamics.CRM.expando",
        "title": "**SLA 已严重超时**",
        "body": "案例记录[需全面检修（示例）](?pagetype=entityrecord&etn=incident&id=0a9f62a8-90df-e311-9565-a45d36fc5fe8)已严重超出SLA时限，已升级至您的经理处理。"
    }
);

收到的错误信息如下：

"message": "Error identified in Payload provided by the user for Entity :'', 
---->  InnerException : System.ArgumentException: Stream was not readable.

问题排查与解决 #

通过查看Network标签中的JSON payload，发现参数出现错位导致赋值错误：

{
"Title":"SLA 已严重超时",
"Recipient":"/systemusers(8d585985-e1f4-ed11-8818-0022483d019b)",
"Body":"分配给您的记录已严重超出SLA时限。",
"Priority":100000003,
"IconType":200000000,
"ToastType":[object Object],
"Expiry":null,
"OverrideContent":null,
"Actions":null
}

可见IconType、ToastType、OverrideContent的参数整体上移一位，最终导致OverrideContent为null。将变量声明改为逐个赋值的方式后，问题得到解决：

var SendAppNotificationRequest = new alya_shared.SendAppNotificationRequest();
sendAppNotificationRequest.Title = "SLA 已严重超时";
sendAppNotificationRequest.Recipient = "/systemusers(8d585985-e1f4-ed11-8818-0022483d019b)";
sendAppNotificationRequest.Body = "分配给您的记录已严重超出SLA时限。";
sendAppNotificationRequest.IconType = 100000003;
sendAppNotificationRequest.ToastType = 200000000;
sendAppNotificationRequest.OverrideContent = {
"@odata.type": "#Microsoft.Dynamics.CRM.expando",
"title": "**SLA 已严重超时**",
"body": "案例记录[需全面检修（示例）](?pagetype=entityrecord&etn=incident&id=0a9f62a8-90df-e311-9565-a45d36fc5fe8)已严重超出SLA时限，已升级至您的经理处理。"
};

内容的提问来源于stack exchange，提问作者user3676641