/// <summary>
/// This function inserts three items into the index with generic Key, Name, Keywords, and Comment properties.
/// </summary>
public async static Task <string> AddItemsToIndex(Windows.Storage.Search.ContentIndexer indexer)
{
var content = new Windows.Storage.Search.IndexableContent();
const int numberOfItemsToIndex = 3;
for (int i = 0; i < numberOfItemsToIndex; i++)
{
content.Properties[Windows.Storage.SystemProperties.ItemNameDisplay] = "Sample Item Name " + i;
content.Properties[Windows.Storage.SystemProperties.Keywords] = "Sample keyword " + i;
content.Properties[Windows.Storage.SystemProperties.Comment] = "Sample comment " + i;
content.Id = "SampleKey" + i;
OnIndexerOperationBegin();
await indexer.AddAsync(content);
OnIndexerOperationComplete(indexer);
}
string[] propertiesToQuery =
{
Windows.Storage.SystemProperties.ItemNameDisplay,
Windows.Storage.SystemProperties.Keywords,
Windows.Storage.SystemProperties.Comment
};
var query = indexer.CreateQuery("*", propertiesToQuery);
uint count = await query.GetCountAsync();
return("Number of items currently in the index: " + count);
}
private async void UpdatePropertyHelper(string itemKey, string propertyKey, string propertyName, object newValue)
{
var indexer = Windows.Storage.Search.ContentIndexer.GetIndexer();
string[] propertiesToRetrieve = { propertyKey };
try
{
// Log the original value of the property
var retrievedProperties = await indexer.RetrievePropertiesAsync(itemKey, propertiesToRetrieve);
var outputString = "Original " + propertyName + ": " + Helpers.StringifyProperty(retrievedProperties[propertyKey]);
// Create an indexable content item to update the property
var content = new Windows.Storage.Search.IndexableContent();
content.Properties.Add(propertyKey, newValue);
content.Id = itemKey;
// Update the indexer
Helpers.OnIndexerOperationBegin();
await indexer.UpdateAsync(content);
Helpers.OnIndexerOperationComplete(indexer);
// Log the new value of the property
retrievedProperties = await indexer.RetrievePropertiesAsync(itemKey, propertiesToRetrieve);
outputString += "\nNew " + propertyName + ": " + Helpers.StringifyProperty(retrievedProperties[propertyKey]);
rootPage.NotifyUser(outputString, NotifyType.StatusMessage);
}
catch (Exception err)
{
rootPage.NotifyUser("Exception thrown! Did you try to retrieve or update a property on a non-existent item?" +
"\nMessage: " + err.Message +
"\nHRESULT: " + String.Format("{0,8:X}", err.HResult),
NotifyType.ErrorMessage);
}
}
private async void AddToIndex_Click(object sender, RoutedEventArgs e)
{
if (ItemKeyInput.Text == "")
{
rootPage.NotifyUser("You must add an item key to insert an item into the index.", NotifyType.ErrorMessage);
}
else
{
// Write the content property to a stream
var contentStream = new Windows.Storage.Streams.InMemoryRandomAccessStream();
var contentWriter = new Windows.Storage.Streams.DataWriter(contentStream);
contentWriter.WriteString(ContentInput.Text);
await contentWriter.StoreAsync();
contentStream.Seek(0);
// Get the name, keywords, and comment properties, and assign a language to them if provided
object itemNameValue = NameInput.Text;
object keywordsValue = KeywordsInput.Text;
object commentValue = CommentInput.Text;
if (LanguageInput.Text != "")
{
var itemNameValueAndLanguage = new Windows.Storage.Search.ValueAndLanguage();
itemNameValueAndLanguage.Language = LanguageInput.Text;
itemNameValueAndLanguage.Value = itemNameValue;
itemNameValue = itemNameValueAndLanguage;
var keywordsValueAndLanguage = new Windows.Storage.Search.ValueAndLanguage();
keywordsValueAndLanguage.Language = LanguageInput.Text;
keywordsValueAndLanguage.Value = keywordsValue;
keywordsValue = keywordsValueAndLanguage;
var commentValueAndLanguage = new Windows.Storage.Search.ValueAndLanguage();
commentValueAndLanguage.Language = LanguageInput.Text;
commentValueAndLanguage.Value = commentValue;
commentValue = commentValueAndLanguage;
}
// Create the item to add to the indexer
var content = new Windows.Storage.Search.IndexableContent();
content.Id = ItemKeyInput.Text;
content.Properties.Add(Windows.Storage.SystemProperties.ItemNameDisplay, itemNameValue);
content.Properties.Add(Windows.Storage.SystemProperties.Keywords, keywordsValue);
content.Properties.Add(Windows.Storage.SystemProperties.Comment, commentValue);
content.Stream = contentStream;
content.StreamContentType = "text/plain";
// Add the item to the indexer
Helpers.OnIndexerOperationBegin();
var indexer = Windows.Storage.Search.ContentIndexer.GetIndexer();
await indexer.AddAsync(content);
Helpers.OnIndexerOperationComplete(indexer);
// Retrieve the item from the indexer and output its properties
var retrievedProperties = await indexer.RetrievePropertiesAsync(ItemKeyInput.Text, content.Properties.Keys);
rootPage.NotifyUser(Helpers.CreateItemString(ItemKeyInput.Text, content.Properties.Keys, retrievedProperties), NotifyType.StatusMessage);
}
}
private async void AddToIndex_Click(object sender, RoutedEventArgs e)
{
if (ItemKeyInput.Text == "")
{
rootPage.NotifyUser("You must add an item key to insert an item into the index.", NotifyType.ErrorMessage);
}
else
{
// Write the content property to a stream
var contentStream = new Windows.Storage.Streams.InMemoryRandomAccessStream();
var contentWriter = new Windows.Storage.Streams.DataWriter(contentStream);
contentWriter.WriteString(ContentInput.Text);
await contentWriter.StoreAsync();
contentStream.Seek(0);
// Get the name, keywords, and comment properties, and assign a language to them if provided
object itemNameValue = NameInput.Text;
object keywordsValue = KeywordsInput.Text;
object commentValue = CommentInput.Text;
if (LanguageInput.Text != "")
{
var itemNameValueAndLanguage = new Windows.Storage.Search.ValueAndLanguage();
itemNameValueAndLanguage.Language = LanguageInput.Text;
itemNameValueAndLanguage.Value = itemNameValue;
itemNameValue = itemNameValueAndLanguage;
var keywordsValueAndLanguage = new Windows.Storage.Search.ValueAndLanguage();
keywordsValueAndLanguage.Language = LanguageInput.Text;
keywordsValueAndLanguage.Value = keywordsValue;
keywordsValue = keywordsValueAndLanguage;
var commentValueAndLanguage = new Windows.Storage.Search.ValueAndLanguage();
commentValueAndLanguage.Language = LanguageInput.Text;
commentValueAndLanguage.Value = commentValue;
commentValue = commentValueAndLanguage;
}
// Create the item to add to the indexer
var content = new Windows.Storage.Search.IndexableContent();
content.Id = ItemKeyInput.Text;
content.Properties.Add(Windows.Storage.SystemProperties.ItemNameDisplay, itemNameValue);
content.Properties.Add(Windows.Storage.SystemProperties.Keywords, keywordsValue);
content.Properties.Add(Windows.Storage.SystemProperties.Comment, commentValue);
content.Stream = contentStream;
content.StreamContentType = "text/plain";
// Add the item to the indexer
Helpers.OnIndexerOperationBegin();
var indexer = Windows.Storage.Search.ContentIndexer.GetIndexer();
await indexer.AddAsync(content);
Helpers.OnIndexerOperationComplete(indexer);
// Retrieve the item from the indexer and output its properties
var retrievedProperties = await indexer.RetrievePropertiesAsync(ItemKeyInput.Text, content.Properties.Keys);
rootPage.NotifyUser(Helpers.CreateItemString(ItemKeyInput.Text, content.Properties.Keys, retrievedProperties), NotifyType.StatusMessage);
}
}
private async void UpdatePropertyHelper(string itemKey, string propertyKey, string propertyName, object newValue)
{
var indexer = Windows.Storage.Search.ContentIndexer.GetIndexer();
string[] propertiesToRetrieve = { propertyKey };
try
{
// Log the original value of the property
var retrievedProperties = await indexer.RetrievePropertiesAsync(itemKey, propertiesToRetrieve);
var outputString = "Original " + propertyName + ": " + Helpers.StringifyProperty(retrievedProperties[propertyKey]);
// Create an indexable content item to update the property
var content = new Windows.Storage.Search.IndexableContent();
content.Properties.Add(propertyKey, newValue);
content.Id = itemKey;
// Update the indexer
Helpers.OnIndexerOperationBegin();
await indexer.UpdateAsync(content);
Helpers.OnIndexerOperationComplete(indexer);
// Log the new value of the property
retrievedProperties = await indexer.RetrievePropertiesAsync(itemKey, propertiesToRetrieve);
outputString += "\nNew " + propertyName + ": " + Helpers.StringifyProperty(retrievedProperties[propertyKey]);
rootPage.NotifyUser(outputString, NotifyType.StatusMessage);
}
catch (Exception err)
{
rootPage.NotifyUser("Exception thrown! Did you try to retrieve or update a property on a non-existent item?" +
"\nMessage: " + err.Message +
"\nHRESULT: " + String.Format("{0,8:X}", err.HResult),
NotifyType.ErrorMessage);
}
}
/// <summary>
/// This function inserts three items into the index with generic Key, Name, Keywords, and Comment properties.
/// </summary>
public async static Task<string> AddItemsToIndex(Windows.Storage.Search.ContentIndexer indexer)
{
var content = new Windows.Storage.Search.IndexableContent();
const int numberOfItemsToIndex = 3;
for (int i = 0; i < numberOfItemsToIndex; i++)
{
content.Properties[Windows.Storage.SystemProperties.ItemNameDisplay] = "Sample Item Name " + i;
content.Properties[Windows.Storage.SystemProperties.Keywords] = "Sample keyword " + i;
content.Properties[Windows.Storage.SystemProperties.Comment] = "Sample comment " + i;
content.Id = "SampleKey" + i;
OnIndexerOperationBegin();
await indexer.AddAsync(content);
OnIndexerOperationComplete(indexer);
}
string[] propertiesToQuery =
{
Windows.Storage.SystemProperties.ItemNameDisplay,
Windows.Storage.SystemProperties.Keywords,
Windows.Storage.SystemProperties.Comment
};
var query = indexer.CreateQuery("*", propertiesToQuery);
uint count = await query.GetCountAsync();
return "Number of items currently in the index: " + count;
}
