public async Task <SegmentedResult <TItem> > GetAllAsync <TItem>(string continuationToken = null, string partitionKey = null, string rowKey = null, int rowCount = 500) where TItem : class, ITableItem, new()
{
string partitionQuery = null, rowQuery = null;
TableQuery query = new TableQuery();
if (!string.IsNullOrWhiteSpace(partitionKey))
{
partitionQuery = TableQuery.GenerateFilterCondition("PartitionKey", QueryComparisons.Equal, partitionKey);
}
if (!string.IsNullOrWhiteSpace(rowKey))
{
rowQuery = TableQuery.GenerateFilterCondition("RowKey", QueryComparisons.Equal, rowKey);
}
if (null != partitionQuery)
{
query = query.Where(partitionQuery);
}
if (null != rowQuery)
{
query = query.Where(rowQuery);
}
query.TakeCount = rowCount;
var token = AzureStorageUtilities.DeserializeTableContinuationToken(continuationToken);
var azureResult = await this.Table.ExecuteQuerySegmentedAsync(query, token);
IEnumerable <TItem> itemsList = azureResult.Results.Select(x => this.Assembler.Assemble <TItem>((DynamicTableEntity)x));
string nextPageToken = azureResult.ContinuationToken.Serialize();
return(new SegmentedResult <TItem>(itemsList, nextPageToken, null != nextPageToken));
}
public async Task <SegmentedResult <TItem> > SelectAsync <TItem>(Expression <Func <TItem, bool> > queryExpression, string continuationToken = null, int rowCount = 500) where TItem : class, ITableItem, new()
{
QueryExpressionVisitor <TItem> visitor = new QueryExpressionVisitor <TItem>();
_ = (Expression <Func <TItem, bool> >)visitor.Visit(queryExpression);
DataServiceContext context = new DataServiceContext(new Uri("https://tempuri.org"));
var dataServiceQuery = context.CreateQuery <TItem>("/items").Where(queryExpression);
string queryString = (((DataServiceQuery)dataServiceQuery).RequestUri).Query;
var queryCollection = HttpUtility.ParseQueryString(queryString);
TableQuery query = new TableQuery()
{
FilterString = queryCollection.Get("$filter"),
TakeCount = rowCount,
};
this.Logger.LogInformation($"Running Azure table query: {query.FilterString}");
var token = AzureStorageUtilities.DeserializeTableContinuationToken(continuationToken);
var azureResult = await this.Table.ExecuteQuerySegmentedAsync(query, token);
IEnumerable <TItem> itemsList = azureResult.Results.Select(x => this.Assembler.Assemble <TItem>((DynamicTableEntity)x));
string nextPageToken = azureResult.ContinuationToken.Serialize();
return(new SegmentedResult <TItem>(itemsList, nextPageToken, null != nextPageToken));
}