AWS .NET SDK SimpleEmail SendEmail 返回“无法加载类型”错误

Question

我正在使用 AWS SimpleEmail 开发一个应用程序。当我尝试测试 SendEmail 功能时，出现以下错误。

无法从程序集“AWSSDK.Core，Version=3.3.0.0，Culture=neutral，PublicKeyToken=885c28607f98e604”加载类型“Amazon.Runtime.Internal.InvokeOptions”。

我安装了 AWSSDK.Core v3.3.31.7 和 AWSSDK.SimpleEmail v3.3.7.30。

var credentials = new BasicAWSCredentials("key", "secret");

var client = new Amazon.SimpleEmail.AmazonSimpleEmailServiceClient(credentials, Amazon.RegionEndpoint.EUWest1);

var sesResponse = client.SendEmail(new SendEmailRequest
{
    Destination = new Destination
    {
        BccAddresses = new List<string>
        {

        },
        ToAddresses = new List<string> {
            "user@cuchuma.net",
            "user2@cuchuma.net"
        }
    },
    Message = new Message
    {
        Body = new Body
        {
            Html = new Content
            {
                Charset = "UTF-8",
                Data = "This message body contains HTML formatting. It can, for example, contain links like this one: <a class=\"ulink\" href = \"http://docs.aws.amazon.com/ses/latest/DeveloperGuide\" target = \"_blank\"> Amazon SES Developer Guide </a>."
            },
            Text = new Content
            {
                Charset = "UTF-8",
                Data = "This is the message body in text format."
            }
        },
        Subject = new Content
        {
            Charset = "UTF-8",
            Data = "Test email"
        }
    },
    ReplyToAddresses = new List<string>
    {

    },
    ReturnPath = "",
    ReturnPathArn = "",
    Source = "no-reply@cuchuma.net",
    SourceArn = ""
});

string messageId = sesResponse.MessageId;

Answer 1

它无法加载的类是 两个月前才添加的。所以我怀疑您的 AWSSDK.Core 版本比您声明的版本 (v3.3.31.7) 旧。

现在我不确定这是如何发生的，但我过去见过 Nuget 搞乱并且项目文件中的手动输入导致加载不正确的 dll 的实例。

在记事本中打开项目文件并查找 SDK 参考。它们应该如下所示：

<Reference Include="AWSSDK.Core, Version=3.3.0.0, Culture=neutral, PublicKeyToken=885c28607f98e604, processorArchitecture=MSIL">
      <HintPath>..\packages\AWSSDK.Core.3.3.31.7\lib\net45\AWSSDK.Core.dll</HintPath>
</Reference>
<Reference Include="AWSSDK.SimpleEmail, Version=3.3.0.0, Culture=neutral, PublicKeyToken=885c28607f98e604, processorArchitecture=MSIL">
      <HintPath>..\packages\AWSSDK.SimpleEmail.3.3.7.30\lib\net45\AWSSDK.SimpleEmail.dll</HintPath>
</Reference>

检查包名称是否确实为 AWSSDK.Core.3.3.31.7 和 AWSSDK.SimpleEmail.3.3.7.30。

另请检查是否没有其他随机 AWSSDK.Core 条目。

最后...您可能遇到的另一个问题，如果您不指定它们，则不要包含以下带有空白字符串的行。它将抛出无效电子邮件地址错误：

ReturnPath = "",
ReturnPathArn = "",
SourceArn = ""