Amazon.DynamoDBv2.AmazonDynamoDBClient.PutItem C# (CSharp) Method

AmazonDynamoDBClient Class Documentation Usage Examples Of Amazon.DynamoDBv2.AmazonDynamoDBClient::PutItem Exibir arquivo Open project: aws/aws-sdk-net

PutItem() public method

Creates a new item, or replaces an old item with a new item. If an item that has the same primary key as the new item already exists in the specified table, the new item completely replaces the existing item. You can perform a conditional put operation (add a new item if one with the specified primary key doesn't exist), or replace an existing item if it has certain attribute values.

In addition to putting an item, you can also return the item's attribute values in the same operation, using the ReturnValues parameter.

When you add an item, the primary key attribute(s) are the only required attributes. Attribute values cannot be null. String and Binary type attributes must have lengths greater than zero. Set type attributes cannot be empty. Requests with empty values will be rejected with a ValidationException exception.

You can request that PutItem return either a copy of the original item (before the update) or a copy of the updated item (after the update). For more information, see the ReturnValues description below.

To prevent a new item from replacing an existing item, use a conditional expression that contains the attribute_not_exists function with the name of the attribute being used as the partition key for the table. Since every record must contain that attribute, the attribute_not_exists function will only succeed if no matching item exists.

For more information about using this API, see Working with Items in the Amazon DynamoDB Developer Guide.

/// A condition specified in the operation could not be evaluated. /// /// An error occurred on the server side. /// /// An item collection is too large. This exception is only returned for tables that have /// one or more local secondary indexes. /// /// Your request rate is too high. The AWS SDKs for DynamoDB automatically retry requests /// that receive this exception. Your request is eventually successful, unless your retry /// queue is too large to finish. Reduce the frequency of requests and use exponential /// backoff. For more information, go to Error /// Retries and Exponential Backoff in the Amazon DynamoDB Developer Guide. /// /// The operation tried to access a nonexistent table or index. The resource might not /// be specified correctly, or its status might not be ACTIVE. ///

public PutItem ( PutItemRequest request ) : PutItemResponse
request	Amazon.DynamoDBv2.Model.PutItemRequest	Container for the necessary parameters to execute the PutItem service method.
return	Amazon.DynamoDBv2.Model.PutItemResponse

        public PutItemResponse PutItem(PutItemRequest request)
        {
            var marshaller = new PutItemRequestMarshaller();
            var unmarshaller = PutItemResponseUnmarshaller.Instance;

            return Invoke<PutItemRequest,PutItemResponse>(request, marshaller, unmarshaller);
        }

Same methods

AmazonDynamoDBClient::PutItem ( string tableName, AttributeValue>.Dictionary item ) : PutItemResponse
AmazonDynamoDBClient::PutItem ( string tableName, AttributeValue>.Dictionary item, ReturnValue returnValues ) : PutItemResponse

Usage Example

Exemplo n.º 1

Exibir arquivo

Arquivo: SolutionCode.cs Projeto: jfaerman/devonaws-labs-csharp

        public virtual void AddImage(AmazonDynamoDBClient dynamoDbClient, string tableName, AmazonS3Client s3Client, string bucketName, string imageKey, string filePath)
        {
            try
            {
                if (File.Exists(filePath))
                {

                    // Create the upload request
                    var putObjectRequest = new PutObjectRequest
                    {
                        BucketName = bucketName,
                        Key = imageKey,
                        FilePath = filePath
                    };

                    // Upload the object
                    s3Client.PutObject(putObjectRequest);

                    // Create the put item request to submit to DynamoDB
                    var putItemRequest = new PutItemRequest
                    {
                        TableName = tableName,
                        Item = new Dictionary<string, AttributeValue>
                        {
                            {"Key", new AttributeValue {S = imageKey}},
                            {"Bucket", new AttributeValue {S = bucketName}}
                        }
                    };

                    dynamoDbClient.PutItem(putItemRequest);
                    _Default.LogMessageToPage("Added imageKey: {0}", imageKey);
                }
                else
                {
                    _Default.LogMessageToPage("Skipped imageKey: {0}", imageKey);
                }
            }
            catch (Exception ex)
            {
                _Default.LogMessageToPage("AddImage Error: {0}", ex.Message);
            }
        }

All Usage Examples Of Amazon.DynamoDBv2.AmazonDynamoDBClient::PutItem

AmazonDynamoDBClient

BatchGetItem

BatchGetItemAsync

BatchWriteItem

BatchWriteItemAsync

BeginBatchGetItem

BeginBatchWriteItem

BeginCreateTable

BeginDeleteItem

BeginDeleteTable

BeginDescribeLimits