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PONeed help adding a stop button --> HttpWebRequest
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  1. PONeed help adding a stop button --> HttpWebRequest
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    copied!<p>I have a program that has a button called "research" when that button is pressed it reads from an input text box that may say " how to * " </p> <p>It starts to pull auto suggestions from say google and the asterisk is replaced by each letter of the alphabet.</p> <p>My question is:</p> <p>I want a button to STOP the search. While it is in motion.</p> <p>What would be the best way to accomplish this?</p> <pre><code>private void btnResearch_Click(object sender, RoutedEventArgs e) { if (string.IsNullOrWhiteSpace(txtResearch.Text.Trim())) { MessageBox.Show("Please enter a search query", "Oops", MessageBoxButton.OK, MessageBoxImage.Exclamation); return; } //Robin: Temporal fix to the multi asterisk if (txtResearch.Text.Trim().Count(s =&gt; s == '*') &gt; 1) { MessageBox.Show("Too many asterisk", "Oops", MessageBoxButton.OK, MessageBoxImage.Exclamation); return; } if (!ValidateLimitations()) { return; } ((LongTailBot.MainWindow)App.Current.MainWindow).PlaySound("button_double_click.wav"); this.chbSelAll.IsChecked = false; List&lt;KeywordItem&gt; keyList = new List&lt;KeywordItem&gt;(); this.dgrResearch.ItemsSource = null; List&lt;string&gt; seetKeywords = SetupSeetKeywords(txtResearch.Text.Trim().Replace(" ", "%20")); if (seetKeywords.Count() &lt; 1) return; foreach (string seetKey in seetKeywords) { this.txbResearch.Text = (seetKeywords.IndexOf(seetKey) + 1).ToString() + "/" + seetKeywords.Count() + " " + seetKey.Replace("%20", " "); Application.Current.Dispatcher.Invoke(DispatcherPriority.Background, new Action(delegate { })); HttpWebRequest request = (HttpWebRequest)WebRequest.Create(this.GetRequestUriString(seetKey)); request.Method = "GET"; request.UserAgent = @"Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.0; Trident/5.0)"; WebResponse response = request.GetResponse(); if (((HttpWebResponse)response).StatusDescription.Trim().ToUpper() == "OK") { using (Stream dataStream = response.GetResponseStream()) { using (StreamReader reader = new StreamReader(dataStream)) { string responseFromServer = reader.ReadToEnd(); var keywordsFound = this.GetKeywordsFound(responseFromServer); foreach (var key in keywordsFound) { keyList.RemoveAll(k =&gt; k.Keyword == key); keyList.Add(new KeywordItem() { Checked = false, Keyword = key }); Application.Current.Dispatcher.Invoke(DispatcherPriority.Background, new Action(delegate { })); } } } if (keyList.Count &gt; 0) { dgrResearch.ItemsSource = null; dgrResearch.ItemsSource = keyList; dgrResearch.ScrollIntoView(dgrResearch.Items[dgrResearch.Items.Count - 1]); } } response.Close(); } this.txbResearch.Text = this.dgrResearch.Items.Count.ToString() + " POPULAR PHRASES AVAILABLE!"; this.chbSelAll.IsChecked = dgrResearch.Items.Count &gt; 0? true : false; ((LongTailBot.MainWindow)App.Current.MainWindow).PlaySound("abstractbtn.wav"); } </code></pre>
 

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