System.Xml.XPath.IXPathNavigab...

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I installed htmlagility pack and developed a new program but when I run the program. I have the following error.

The type 'System.Xml.XPath.IXPathNavigableS' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Xml.XPath, Version=2.0.5.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'

I searched System.Xml.Xpath dll in C:\Program Files\Microsoft SDKs and there is no Silverlight folder and no dll. I installed Silverlight 5.1. When I searched it in C:\Program Files\Microsoft Silverlight\5.1.10411.0, I only found System.Xml.dll but no xpath.dll. The program is in VS 2008 and window XP. Please give me any suggestions to move on and start using htmlagilitypack.

Thanks.

Posted 2-Dec-12 16:38pm

MI12344

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3 solutions

Solution 2

Hi
Sorry i couldn't find any solution other than referring the dll.

C:\Program Files\Microsoft SDKs\Silverlight\v4.0\Libraries\Client\System.Xml.XPath.dll

Can you search in your system for this dll ? Sometimes the location you are trying to find the dll may be wrong.

Others may come with a better solution. All the best !!

Regards
Dominic

Posted 2-Dec-12 19:53pm

Dominic Abraham

Comments

MI12344 3-Dec-12 4:41am

Yes, I found it on my laptop, but there is no Silverlight\v4.0 folder on my work desktop. It has really given me trouble. Thanks for your solution.

Dominic Abraham 3-Dec-12 5:01am

Nice !!!
If the solution is helpful don't forget to mark it as answer. So that it may help others with similar issues.

MI12344 4-Dec-12 1:29am

Even if Siliverlight 5.1 was removed and 4.0 installed again on Window Xp, I cannot still find System.Xml.Xpath. I only found System.Xml. Is it related with VS 2008 platform?

Dominic Abraham 4-Dec-12 6:32am

"C:\Program Files\Microsoft SDKs\Silverlight\v4.0\Libraries\Client\" .
This folder exists in your system?

Solution 3

No, I do not. I just realized that VS 2008 comes with Silverlight 2.0. So I installed v 2.0 and there is C:\Program Files\Microsoft SDKs\Silverlight\v2.0\Libraries\Client, but there is no System.Xml.Xpath.dll file. No SYSTEM.XML.XPATH dll in VS 2008 and silverlight 2.0!

Posted 4-Dec-12 15:33pm

MI12344

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Dominic Abraham · Accepted Answer · 2012-12-02T18:24:00

Solution 1

Hi
I think the

C#

System.Xml.XPath

namespace coming under

C#

System.Xml.dll

This dll you can find in the folder

C:\Program Files\Reference Assemblies\Microsoft\Framework\.NETFramework\v3.5\Profile\Client

C:\Program Files\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\Profile\Client

Or you can just use Visual Studio Project -> Right Click -> AddReference -> .NET -> System.Xml.dll to find dll.

Can you please check in the below mentioned folder also.

C:\Program Files\Microsoft SDKs\Silverlight\v4.0\Libraries\Client

There you can find a dll named

System.Xml.XPath.dll

Regards
Dominic

Posted 2-Dec-12 18:24pm

Dominic Abraham

Updated 2-Dec-12 18:33pm

v2

Comments

MI12344 3-Dec-12 1:04am

Thanks, but I cannot find the System.Xml.Xpath dll file but when I added Xml to the Add reference, I can use it as System.Xml.Xpath. But when I run this program, it still shows me that error. I followed the web scrapper tutorial from this site http://www.notonlycoder.com/blog/web-scraping-tutorial-c-part-2-get-html-manage-speed-and-timeout/

MI12344 3-Dec-12 1:04am

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using HtmlAgilityPack;
using System.Xml.XPath;

namespace DictateConverter.HtmlScraper.Request
{
class HtmlScraper
{
private static HtmlDocument getHtmlDocumentWebClient(string url, bool useProxy, string proxyIp, int proxyPort, string usename, string password)
{
HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
WebClient client = new WebClient();
client.Headers.Add("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705;)");
client.Credentials = CredentialCache.DefaultCredentials;
client.Proxy = WebRequest.DefaultWebProxy;

if (useProxy)
{
//Proxy
if (!string.IsNullOrEmpty(proxyIp))
{
WebProxy p = new WebProxy(proxyIp, proxyPort);
if (!string.IsNullOrEmpty(usename))
{
if (password == null)
password = string.Empty;
NetworkCredential nc = new NetworkCredential(usename, password);
p.Credentials = nc;
}
}
}

Stream data = client.OpenRead(url);
doc.Load(data);
data.Close();
return doc;

}

public static HtmlDocument GetHtmlDoc(string url, Dictate360Converter.Request.Options options, ProxyModel proxy)
{
try
{
if (options != null)
{
if (options.Request_pause_milliseconds >= 0)
System.Threading.Thread.Sleep(options.Request_pause_milliseconds);
}

//Execute WITH Proxy
if (proxy != null)
{
//if proxy ip is empty use standard request
if (proxy.Ip.ToLower() != "")
{
return getHtmlDocumentWebClient(url, true, proxy.Ip, Int32.Parse(proxy.Port), proxy.Username, proxy.Password);
}
else
{ return getHtmlDocumentWebClient(url, false, string.Empty, 0, string.Empty, string.Empty); }

}
else return getHtmlDocumentWebClient(url, false, String.Empty, 0, String.Empty, String.Empty);
}

catch (TimeoutException tEx)
{
System.Threading.Thread.Sleep(options.Pause_after_timeout_milliseconds);
Logger.Instance.Log.Error(string.Format("TimeoutException : Noc.HtmlScraper.Request.Load.GetHtmlDoc({0},options,proxies)", url), tEx);
return null;
}
catch (Exception ex)
{
Logger.Instance.Log.Error(string.Format("Noc.HtmlScraper.Request.Load.GetHtmlDoc({0},options,proxies)", url), ex);
return null;
}

}
}
}