public void DeleteItem(Hashtable State, string TableName, string primaryKeyValue,string RangeKeyValue)
{
try
{
if (State["DynamoDBClient"] == null)
SetupClient(State);
AmazonDynamoDB client = (AmazonDynamoDB)State["DynamoDBClient"];
Table table = Table.LoadTable(client, TableName);
DeleteItemOperationConfig config = new DeleteItemOperationConfig
{
// Return the deleted item.
ReturnValues = ReturnValues.AllOldAttributes
};
Document document = table.DeleteItem(primaryKeyValue, RangeKeyValue,config);
}
catch (Exception ex)
{
string error = ex.Message;
}
}
internal Document DeleteHelper(Key key, DeleteItemOperationConfig config, bool isAsync)
{
var currentConfig = config ?? new DeleteItemOperationConfig();
var req = new DeleteItemRequest
{
TableName = TableName,
Key = key
};
req.BeforeRequestEvent += isAsync ?
new RequestEventHandler(UserAgentRequestEventHandlerAsync) :
new RequestEventHandler(UserAgentRequestEventHandlerSync);
if (currentConfig.ReturnValues == ReturnValues.AllOldAttributes)
{
req.ReturnValues = EnumToStringMapper.Convert(currentConfig.ReturnValues);
}
if (currentConfig.Expected != null)
{
req.Expected = currentConfig.Expected.ToExpectedAttributeMap();
}
var attributes = DDBClient.DeleteItem(req).DeleteItemResult.Attributes;
Document ret = null;
if (currentConfig.ReturnValues == ReturnValues.AllOldAttributes)
{
ret = Document.FromAttributeMap(attributes);
}
return ret;
}
/// <summary>
/// Delete a document in DynamoDB, identified by hash-and-range primary key,
/// using the specified configs.
/// </summary>
/// <param name="hashKey">Hash key element of the document.</param>
/// <param name="rangeKey">Range key element of the document.</param>
/// <param name="config">Configuration to use.</param>
/// <returns>Null or old attributes, depending on config.</returns>
public Document DeleteItem(Primitive hashKey, Primitive rangeKey, DeleteItemOperationConfig config)
{
return DeleteHelper(MakeKey(hashKey, rangeKey), config, false);
}
/// <summary>
/// Delete a document in DynamoDB, using specified configs.
/// </summary>
/// <param name="document">Document to delete.</param>
/// <param name="config">Configuration to use.</param>
/// <returns>Null or old attributes, depending on config.</returns>
public Document DeleteItem(Document document, DeleteItemOperationConfig config)
{
return DeleteHelper(MakeKey(document), config, false);
}
/// <summary>
/// Initiates the asynchronous execution of the DeleteItem operation.
/// <seealso cref="Amazon.DynamoDB.DocumentModel.Table.DeleteItem"/>
/// </summary>
/// <param name="hashKey">Hash key element of the document.</param>
/// <param name="rangeKey">Range key element of the document.</param>
/// <param name="config">Configuration to use.</param>
/// <param name="callback">An AsyncCallback delegate that is invoked when the operation completes.</param>
/// <param name="state">A user-defined state object that is passed to the callback procedure. Retrieve this object from within the callback
/// procedure using the AsyncState property.</param>
/// <returns>An IAsyncResult that can be used to poll or wait for results, or both; this value is also needed when invoking EndDeleteItem
/// operation.</returns>
public IAsyncResult BeginDeleteItem(Primitive hashKey, Primitive rangeKey, DeleteItemOperationConfig config, AsyncCallback callback, object state)
{
return DynamoDBAsyncExecutor.BeginOperation(() => DeleteHelper(MakeKey(hashKey, rangeKey), config, true), callback, state);
}
/// <summary>
/// Initiates the asynchronous execution of the DeleteItem operation.
/// <seealso cref="Amazon.DynamoDB.DocumentModel.Table.DeleteItem"/>
/// </summary>
/// <param name="document">Document to delete.</param>
/// <param name="config">Configuration to use.</param>
/// <param name="callback">An AsyncCallback delegate that is invoked when the operation completes.</param>
/// <param name="state">A user-defined state object that is passed to the callback procedure. Retrieve this object from within the callback
/// procedure using the AsyncState property.</param>
/// <returns>An IAsyncResult that can be used to poll or wait for results, or both; this value is also needed when invoking EndDeleteItem
/// operation.</returns>
public IAsyncResult BeginDeleteItem(Document document, DeleteItemOperationConfig config, AsyncCallback callback, object state)
{
return DynamoDBAsyncExecutor.BeginOperation(() => DeleteHelper(MakeKey(document), config, true), callback, state);
}
/// <summary>
/// Delete a document in DynamoDB, identified by a hash primary key,
/// using specified configs.
/// </summary>
/// <param name="hashKey">Hash key element of the document.</param>
/// <param name="config">Configuration to use.</param>
/// <returns>Null or old attributes, depending on config.</returns>
public Document DeleteItem(Primitive hashKey, DeleteItemOperationConfig config)
{
return DeleteHelper(MakeKey(hashKey, null), config);
}
