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You can also return the item's attribute values in the same UpdateItem operation using the ReturnValues parameter.
Namespace: Amazon.DynamoDBv2
Assembly: AWSSDK.dll
Version: (assembly version)
public abstract UpdateItemResponse UpdateItem( UpdateItemRequest request )
Container for the necessary parameters to execute the UpdateItem service method.
Exception | Condition |
---|---|
ConditionalCheckFailedException | A condition specified in the operation could not be evaluated. |
InternalServerErrorException | An error occurred on the server side. |
ItemCollectionSizeLimitExceededException | An item collection is too large. This exception is only returned for tables that have one or more local secondary indexes. |
ProvisionedThroughputExceededException | 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. |
ResourceNotFoundException | The operation tried to access a nonexistent table or index. The resource might not be specified correctly, or its status might not be ACTIVE. |
This example shows how to update an item in a table.
// Create a client AmazonDynamoDBClient client = new AmazonDynamoDBClient(); // Define item key // Hash-key of the target item is string value "Mark Twain" // Range-key of the target item is string value "The Adventures of Tom Sawyer" Dictionary<string, AttributeValue> key = new Dictionary<string, AttributeValue> { { "Author", new AttributeValue { S = "Mark Twain" } }, { "Title", new AttributeValue { S = "The Adventures of Tom Sawyer" } } }; // Define attribute updates Dictionary<string, AttributeValueUpdate> updates = new Dictionary<string, AttributeValueUpdate>(); // Update item's Setting attribute updates["Setting"] = new AttributeValueUpdate() { Action = AttributeAction.PUT, Value = new AttributeValue { S = "St. Petersburg, Missouri" } }; // Remove item's Bibliography attribute updates["Bibliography"] = new AttributeValueUpdate() { Action = AttributeAction.DELETE }; // Add a new string to the item's Genres SS attribute updates["Genres"] = new AttributeValueUpdate() { Action = AttributeAction.ADD, Value = new AttributeValue { SS = new List<string> { "Bildungsroman" } } }; // Create UpdateItem request UpdateItemRequest request = new UpdateItemRequest { TableName = "SampleTable", Key = key, AttributeUpdates = updates }; // Issue request client.UpdateItem(request);
.NET Framework:
Supported in: 4.5, 4.0, 3.5