WCF 数据服务：保存大量更改时出现 400 错误请求
我有一个客户端，它创建了数千个实体并将其发送到服务，如下所示：
for(int i=0;i<99999999; i++)
{
var contract = new Contract { Id = i, Name = "Ctr" + i.ToString() , ... }
service.AddToContracts(contract);
}
svc.SaveChanges(SaveChangesOptions.Batch);
问题是当我尝试保存更改时，出现以下异常：
“400 - 错误请求”
I have a client that creates thousands of entities and sends it over to the service like so :
for(int i=0;i<99999999; i++)
{
var contract = new Contract { Id = i, Name = "Ctr" + i.ToString() , ... }
service.AddToContracts(contract);
}
svc.SaveChanges(SaveChangesOptions.Batch);
the problem is that when I try to save the changes, I get the following exception :
"400 - Bad Request"
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评论（4）
WCF 数据服务不太擅长写入大量数据。
大约一年前，当我的代码尝试写入 100,000 个对象时，我遇到了麻烦......我修改了代码以将对象添加到更小的块中（失去了操作的事务性），这有效。
WCF Data Services isn't very good at writing large amounts of data.
I got into trouble about a year ago when my code tried to write 100,000 objects... I modified the code to add the objects in smaller chunks (losing the transactional nature of my operation), which worked.
您可以尝试增加
MaxStringContentLength和MaxReceivedMessageSize值。此博客将为您提供帮助。
You can try by increasing
MaxStringContentLengthandMaxReceivedMessageSizevalues.This blog will help you.
不要只在最后保存为一批，而是每添加 100 个合约就保存一次。
Don't save as a batch only at the end and instead save every 100 contracts added or something.
您可以在服务上启用跟踪，以获取请求失败的确切错误以及失败的原因是什么？如果有很多实体被传递到您的 WCF 服务，请尝试增加 web.config 中的以下设置，
如果您可以发布您的服务配置，也会很容易。
You can enable tracing on your service to get the exact error on where your request is failing and what is the cause for it? If there are many number of entities being passed to your WCF Service try to increase the following settings in your web.config
Also would be easy if you can post your service configuration.