No RegionEndpoint or ServiceURL configured

Question

I am writing code to upload files to AWS S3 and receiving this exception:

AmazonClientException: No RegionEndpoint or ServiceURL configured

Answer 1

My access key id and secret key are can be used.
Therefore I give up using TransferUtility Class and chosing another Class named PutObjectRequest to upload my files
attontion: PutObjectRequest’s Property Key,it's directory name and file name must equal to local files' directory name and file name.
codes here:

        String s3Path = "987977/Baby.db";
        Console.WriteLine("Ready to upload");
        AWSCredentials credentials;
        credentials = new BasicAWSCredentials(accessKeyID.Trim(), secretKey.Trim());
        AmazonS3Client s3Client = new AmazonS3Client(accessKeyID.Trim(), secretKey.Trim(), Amazon.RegionEndpoint.USEast1);
        Console.WriteLine("Successful verification");
        Console.WriteLine("Check： if the bucket exists");
        if (!CheckBucketExists(s3Client, bucketName))
        {
            s3Client.PutBucket(bucketName);
            Console.WriteLine("Creat bucket");
        }
        string localPath = @"E:\telerikFile\987977\Baby.db";
        PutObjectRequest obj = new PutObjectRequest();
        var fileStream = new FileStream(localPath, FileMode.Open, FileAccess.Read);
  //      obj.FilePath= @"E:\telerikFile\987977\Baby.db";
        obj.InputStream = fileStream;
        obj.BucketName = bucketName;
        obj.Key = s3Path;
       // obj.ContentBody = "This is sample content...";
        obj.CannedACL = S3CannedACL.PublicRead;
        Console.WriteLine("uploading");
        // default to set public right  
        s3Client.PutObject(obj);