AWS SDK Version 3 for .NET
API Reference

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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. You can return the item's attribute values in the same operation, using the ReturnValues parameter.

This topic provides general information about the PutItem API.

For information on how to call the PutItem API using the AWS SDK in specific languages, see the following:

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.

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 PutItem, see Working with Items in the Amazon DynamoDB Developer Guide.


For .NET Core, PCL and Unity this operation is only available in asynchronous form. Please refer to PutItemAsync.

Namespace: Amazon.DynamoDBv2
Assembly: AWSSDK.DynamoDBv2.dll
Version: 3.x.y.z


public virtual PutItemResponse PutItem(
         PutItemRequest request
Type: Amazon.DynamoDBv2.Model.PutItemRequest

Container for the necessary parameters to execute the PutItem service method.

Return Value
The response from the PutItem service method, as returned by DynamoDB.


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 put an item in a table.

PutItem sample

// Create a client
AmazonDynamoDBClient client = new AmazonDynamoDBClient();

// Define item attributes
Dictionary attributes = new Dictionary();
// Author is hash-key
attributes["Author"] = new AttributeValue { S = "Mark Twain" };
// Title is range-key
attributes["Title"] = new AttributeValue { S = "The Adventures of Tom Sawyer" };
// Other attributes
attributes["Year"] = new AttributeValue { N = "1876" };
attributes["Setting"] = new AttributeValue { S = "Missouri" };
attributes["Pages"] = new AttributeValue { N = "275" };
attributes["Genres"] = new AttributeValue
    SS = new List { "Satire", "Folk", "Children's Novel" }

// Create PutItem request
PutItemRequest request = new PutItemRequest
    TableName = "SampleTable",
    Item = attributes

// Issue PutItem request


Version Information

.NET Framework:
Supported in: 4.5, 4.0, 3.5

Portable Class Library:
Supported in: Windows Store Apps
Supported in: Windows Phone 8.1
Supported in: Xamarin Android
Supported in: Xamarin iOS (Unified)
Supported in: Xamarin.Forms

Supported Versions: 4.6 and above
Supported Platforms: Android, iOS, Standalone

See Also