Google Spell Checker Api Asp.Net C#


In this article you will learn how to use the Google Spell Checker API in Asp.Net C# apps

Download the complete source code from here

The API is very simple,  spell checking is done through a XML http post to the following url

https://www.google.com/tbproxy/spell?lang=en:

Request XML structure

<?xml version=”1.0encoding=”utf-8?>
<spellrequest textalreadyclipped=”0ignoredups=”0ignoredigits=”1ignoreallcaps=”1>
<text>Hotal</text>
</spellrequest
>

The folloing are the Response XML from Google API

<?xml version=”1.0encoding=”UTF-8?>
<spellresult error=”0clipped=”0charschecked=”12>
<c o=”0l=”5s=”0″>
Hotel Hotly Total Ital Hots</c>
<
/spellresult
>

Tag Description
o The offset from the start of the text of the word
l Length of misspelled word
s Confidence of the suggestion
text Tab delimited list of suggestions

See the complete code here

using System;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;

public static class SpellChecker
{
 public static String DidYouMean(string word)
 {
 string retValue = string.Empty;
 try
 {
 string uri = "https://www.google.com/tbproxy/spell?lang=en:";
 using (WebClient webclient = new WebClient())
 {
 string postData = string.Format("<?xml version=\"1.0\" encoding=\"utf-8\" ?><spellrequest textalreadyclipped=\"0\" ignoredups=\"0\" ignoredigits=\"1\" "
 + "ignoreallcaps=\"1\"><text>{0}</text></spellrequest>",word);

 webclient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
 byte[] bytes = Encoding.ASCII.GetBytes(postData);
 byte[] response = webclient.UploadData(uri, "POST", bytes);
 string data = Encoding.ASCII.GetString(response);
 if (data != string.Empty)
 {
    retValue = Regex.Replace(data, @"<(.|\n)*?>", string.Empty).Split('\t')[0];
 }
 }
 }
 catch (Exception exp)
 {

 }
 return retValue;
 }
 }

protected void Page_Load(object sender, EventArgs e)
{
    string word = SpellChecker.DidYouMean("Hotal");
    if(word != string.Empty)
    {
         labMessage.Text = "<font style='font-size:12px;color:red;'>Did you mean </font><b>" + retValue + "</b>";
    }
}

You can Download the complete source code from here

Hope this help and If you have any comments, please feel free to write your feedback.

Thanks
Deepu

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Asp.Net 4.0 URL Routing


It’s been  really easy  in Asp.Net 4.0 for building SEO friendly URL applications with VS 2010. In one my previous article I have explained how we can achieve the same in Asp.Net 3.5  (check it out).  In Asp.Net 3.5 we need to implement the IRouteHandler interface in custom route handler class and bla bla….but now in Asp.Net 4.0 we do not need all extra code.  I am following the same example in my previous article here.  In the Global.asax file I am registering the routes some thing like below

You can download the entire article from here

Global.asax file Configuration

Add Import directive to Import System.Web.Routing name space

<%@ Import Namespace=”System.Web.Routing” %>

void RegisterRoutes(RouteCollection routes)
 {
 routes.MapPageRoute(
 "member-list",
 "member/{name}",
 "~/member-list.aspx"
 );
 }

 void Application_Start(object sender, EventArgs e)
 {
RegisterRoutes(RouteTable.Routes);
}

The first parameter member/{name} which denote the url structure, here the url which starts /member/{name} (ex : /member/deepu/) will point physically to the following path ~/member/member-list.aspx

Create a aspx page called default.aspx

This page will have a list of Members in Tabular format. I am going to use asp.net List view control to achieve this.

<asp:ListView ID=”lvUserList” runat=”server”>
<LayoutTemplate>
<table width=”50%” style=”background-color: lightgrey;” cellpadding=”2″ cellspacing=”1″
border=”0″>
<tr style=”background-color: white”>
<td width=”100″ align=”center”>
Member ID
</td>
<td align=”center”>
Name
</td>
<td width=”75″ align=”center”>
Blog
</td>
<td width=”50″>
</td>
</tr>
<asp:PlaceHolder ID=”itemPlaceholder” runat=”server” />
</table>
</LayoutTemplate>
<ItemTemplate>
<tr style=”background-color: white”>
<td align=”center”>
<asp:Label ID=”lab” Text='<%# DataBinder.Eval(Container.DataItem, “MemberID”)%>’
runat=”server” />
</td>
<td>
<asp:Label ID=”Label1″ Text='<%# DataBinder.Eval(Container.DataItem, “Name”)%>’ runat=”server” />
</td>
<td align=”center”>
<a target=”_blank” href='<%# DataBinder.Eval(Container.DataItem, “BlogURL”)%>’>Blog</a>
</td>
<td align=”center”>
<a href=”<%= ResolveUrl(“~/member/”)%><%# DataBinder.Eval(Container.DataItem, “Name”)%>”>
Detail</a>
</td>
</tr>
</ItemTemplate>
<ItemSeparatorTemplate>
<br />
</ItemSeparatorTemplate>
</asp:ListView>

Default.aspx.cs code behind

public partial class Memeber
{
 public int MemberID { get; set; }
 public string Name { get; set; }
 public string BlogURL { get; set; }
}


public partial class _Default : System.Web.UI.Page
{
 protected void Page_Load(object sender, EventArgs e)
 {
 if (!IsPostBack)
 {
 BindUsers();
 }
 }

 void BindUsers()
 {
 var items = new List<Memeber>()
 {
 new Memeber {MemberID = 1,Name = "Deepu", BlogURL = "https://deepumi.wordpress.com"},
 new Memeber {MemberID = 2,Name = "Scott", BlogURL = "http://weblogs.asp.net/scottgu/"},
 new Memeber {MemberID = 3,Name = "Joe", BlogURL = "http://misfitgeek.com"},
 };


 lvUserList.DataSource = items.ToList();
 lvUserList.DataBind();
 }
}

We have completed the listing page. The next page will be the detail page which will be rendering the member name for the URL routing.

Member-List.aspx Page

<asp:Content ID=”BodyContent” runat=”server” ContentPlaceHolderID=”MainContent”>
Member Name : <asp:Label ID=”labMemberName” runat=”server” />
</asp:Content>

Member-List.aspx code behind Page

var name = Page.RouteData.Values["name"];
 if (name != null)
 {
 Page.Title = name.ToString();
 labMemberName.Text = name.ToString();
 }

You can download the entire article from here

Hope this help and If you have any comments, please feel free to write your feedback.

Thanks
Deepu