//根据基本地址，获取一个数据库服务对象
public static DBService Get(string uri)
{
if (!services.ContainsKey(uri))
{
services[uri] = new DBService() { Uri = uri };
}
return services[uri];
}
public void SaveModified()
{
DBService.Get(WebClientInfo.BaseAddress).Invoke(this, SaveModifiedToJson);
}
public void Delete()
{
DBService.Get(WebClientInfo.BaseAddress).Invoke(this, DeleteToJson);
}