Programming Myself.. Ambati Sreedhar: Dotnet Notes

MS CRM 4 Ajax call

Wed, 20 Aug 2008 14:18:55 GMT

In c:\inetpub\wwwroot
Create a file with .aspx extension and that file should contain only one line which is

<%@ Page Language="C#" Inherits="FetchRoles" %>
Here FetchRoles is the codebehind file which we create later.

Now in Entity Onload wherever u want u have to link this .aspx page like the below

------
var result = FetchCurrentUserRole();
var head= document.getElementsByTagName('head')[0];
var scriptTag= document.createElement('script');
scriptTag.type= 'text/javascript';
scriptTag.text = result;
document.getElementsByTagName('head')[0].appendChild(scriptTag);
ExecuteRoleDetails();

function FetchCurrentUserRole()
{
var requestXml = "<postxml><entity>" + crmForm.ObjectTypeName + "</entity><roles>Nursing Supervisor,Logistic Staff Member,Management Staff Member,Account

Staff Member,Customer Service Staff Member,Sales Staff Member</roles></postxml>";
var responseValue;
      var currentURL = document.location.href;
             var thirdPlace = currentURL.indexOf('/', 10);
             var rootUrl= currentURL.substring(0, thirdPlace);
             var strURL = rootUrl + "/FetchRoles.aspx";

try
{
  var result = XMLPostExecute(strURL, requestXml);
  var ObjXML = new ActiveXObject("Microsoft.XMLDOM");
  ObjXML.async = false;
                ObjXML.loadXML(result.xml);

  if (ObjXML != null)
  {
                  responseValue = ObjXML.selectSingleNode("//result").text;
  }

}
catch(ex)
{
  alert('Error : -> ' + ex.message);
}
return responseValue ;
}

function XMLPostExecute(strTaget,strXML)
{
  try {
   var xmlhttp;
   xmlhttp = new ActiveXObject("MSXML2.XMLHTTP");

   xmlhttp.open("POST", strTaget , false);
   var xmldoc = new ActiveXObject ("Microsoft.XMLDOM");

   xmldoc.loadXML(strXML);

   xmlhttp.send(xmldoc);

   if( xmlhttp.status >=200 && xmlhttp.status <= 300 )
   {
    if(xmldoc.loadXML(xmlhttp.responseXML.xml))
    {
     if(xmldoc.selectSingleNode("//error"))
     {
      alert(xmldoc.selectSingleNode("//error").text);
      return null;
     }
     else
     {
      return xmldoc;
     }
    }
   }
   return xmlhttp.responseXML.xml;
  }
  catch(ex)
  {
   alert('Error in fetching current user roles : ' + ex.description);
   return false;
  }
}
------------
in codebehind file write this

protected void Page_Load(Object sender, System.EventArgs e)
        {
            config = new Configuration();
            string responseString;
            base.Response.ContentType = "text/xml";
            responseString = CheckForValidUser();
            Response.Write("<result> function ExecuteRoleDetails() {" + responseString + " }</result>");
        }

        public string CheckForValidUser()
        {
            string javascriptString = string.Empty;

StreamReader postXmlReader = new StreamReader(Request.InputStream);

string requestXml = string.Empty;

requestXml = postXmlReader.ReadToEnd();

            if (requestXml == string.Empty || requestXml == "")
            {
                return string.Empty;
            }
            XmlDocument entityXmlDoc = new XmlDocument();
            entityXmlDoc.LoadXml(requestXml);
            string rolesList = entityXmlDoc.SelectSingleNode("//postxml/roles").InnerText;
            string entity = entityXmlDoc.SelectSingleNode("//postxml/entity").InnerText;

}
===============

From the above 2 code pieces we can infer like this:

in the javascript link the aspx page and pass input to the code behind file in a xml format
IN .cs file read the xml format and based on it do the calculations and send it to javascript again.
------------

How to debug?
============

just build the ajax project which has cs file.
copy the dll into c:\inetpub\wwwroot\bin

Attach to w3wp.exe(world wide web publishing)

IE Javascript issue

Wed, 30 Jul 2008 15:14:17 GMT

I added this post for my future reference. Today I spend 1 hr for solving this small issue.

dynamically I want to add some javascript piece to script tag in runtime:

Usually we will do like this:

var head= document.getElementsByTagName('head')[0];

var scriptTag= document.createElement('script');

scriptTag.type= 'text/javascript';

scriptTag.innerText = result;

document.getElementsByTagName('head')[0].appendChild(scriptTag);

But in IE

you have to use "text" in place of "innerText"

var head= document.getElementsByTagName('head')[0];

var scriptTag= document.createElement('script');

scriptTag.type= 'text/javascript';

scriptTag.text = result;

document.getElementsByTagName('head')[0].appendChild(scriptTag);

Here result is my piece of javascript code.

Courtesy: http://poeticcode.wordpress.com/2007/10/03/innerhtml-and-script-tags/

RIn the wonderfully buggy world of IE, if you dynamically add a script tag to the DOM, you cannot do:

//works in modern DOM aware browsers
var scriptTag = document.createElement(’script’);
scriptTag.appendChild( document.createTextNode( ‘your js code here’ ) );

//in IE, you can’t do the above (it will just ignore the code), you need to do:
var scriptTag = document.createElement(’script’);
scriptTag.text = ‘your js code here’;

Yet another ugly IE hack.

PS in case you haven’t encountered it yet, you’ll find a similar issue when trying to create a style tag on the fly

C# 4.0 new features

Sun, 27 Jul 2008 04:41:55 GMT

Got from Mahesh(http://cyberiafreak.spaces.live.com/Blog/cns!410E76C6390C7090!1272.entry)

Anastasiosyal.com blogged about upcoming C# 4.0 features -

http://anastasiosyal.com/archive/2008/07/19/4-features-for-c-4.0.aspx

ADO.NET version 2.0 features

Tue, 08 Jul 2008 14:16:56 GMT

ADO.NET version 2.0 features
The simplest and fastest way of copying a large amount of data from different sources to an SQL Server table can be accomplished with the help of Bulk Copy Operation, a new feature in ADO.NET version 2.0.
a) Multiple Active Results Sets(MARS)-allows application to have multiple 'SqlDataReader' open on a connection where each instance of 'SqlDataReader' is started from a separate command.
(b) Batch processing-another feature included to enhance application performance is batch processing in which updates to databse from 'Dataset' are done in batches.
(c) Data tracing-an interesting feature is built-in data tracing supported by .NET data providers.

configSource in web.config

Tue, 08 Jul 2008 04:55:14 GMT

splitting web.config into different custom config files

In web application

in web.config

==========

<?xml version="1.0"?>

</appSettings>

connectionStrings/>

<system.web>

</system.web>

</configuration>

Add another config file whose name is moresettings.config

The code in moresettings.config is

==========================

</appSettings>

References:

http://blogs.vertigosoftware.com/swarren/archive/2006/11/28/4115.aspx

http://www.nikhilk.net/Entry.aspx?id=158

http://weblogs.asp.net/fmarguerie/archive/2007/04/26/using-configsource-to-split-configuration-files.aspx

http://www.devx.com/vb2themax/Tip/18880

http://www.dotnetfun.com/articles/framework/2.0/WhatsNew20ConfigurationManager.aspx

http://69.10.233.10/KB/aspnet/AddCustomConfigSections.aspx

http://simpable.com/code/asp-net-web-config-tips-part-two/

Word Document | Mail Merge

Sun, 22 Jun 2008 11:17:15 GMT

When I joined in Vempower technologies , Hyd (my second company) the first task that was assigned was MailMerge option in Word Document.
This link helped me at that time.
http://support.microsoft.com/default.aspx?scid=http://support.microsoft.com:80/support/kb/articles/Q301/6/56.ASP&NoWebContent=1
Creating a word template file with placeholders , then data in another doc file then mail merge (placing the placeholders with data).

Now in Proteans( my fourth or 5th company) in my new project the task that was assigned was again MailMerge
Now this link helped me
http://msdn.microsoft.com/en-us/library/bb407305(VS.80).aspx
VSTO
Refer Microsoft Word Object 12 Library
I used Content Controls in word document. In ms word 2007 select : wordoptions - popular --show developer tab
Then only u can place content controls in word
In the sample given in the above link I used "Replace Field" where content controls are used.
Prepare a word template with content controls.
place 2 content controls on word . choose properties and give different titles to the content controls.They are served as keys which are later used in

Keyvalue pairs.

Choose class library project
In the class file
using Microsoft.Office.Interop.Word;

public static bool CreateDraft(string templateDocPath, StringDictionary keyValues, string outputDocPath)
        {
            Application app = new Application();
            app.Visible = false;
            object varFalseValue = false;
            object varTrueValue = true;
            object varMissing = Type.Missing;

object templateDocObject = templateDocPath;

Document doc = app.Documents.Open(ref templateDocObject, ref varMissing, ref varFalseValue, ref varMissing, ref varMissing, ref varMissing, ref

varMissing, ref varMissing, ref varMissing, ref varMissing, ref varMissing, ref varMissing, ref varMissing, ref varMissing, ref varMissing, ref varMissing);

            ContentControls contentControls = doc.ContentControls;
            for (int i = 1; i <= contentControls.Count; i++)
            {
                object indexObject = i;
                string key = contentControls.get_Item(ref indexObject).Title;
                if (keyValues.ContainsKey(key))
                {
                    contentControls.get_Item(ref indexObject).Range.Text = keyValues[key];
                }
            }
            object outputDocObject = outputDocPath;

doc.SaveAs(ref outputDocObject, ref varMissing, ref varMissing, ref varMissing, ref varMissing, ref varMissing, ref varMissing, ref varMissing,

ref varMissing, ref varMissing, ref varMissing, ref varMissing, ref varMissing, ref varMissing, ref varMissing, ref varMissing);
            doc.Close(ref varFalseValue, ref varMissing, ref varMissing);
            return true;
        }

From the above code u can observe lot of varmissing ..
Because in C# there is no default parameters.So they made me mandatory to supply those.Where the links (given above ) are vb.net code.And they are cleaner

code as they allow default parameters. This is one area I faced trouble.

In the above templatedocpath has to be given to the function , keyvalues is a string dictionary for placing the text in the content controls of word,

outputpath is the path of the word document to be saved.

For testing this write the below code in the console application

StringDictionary keyValues = new StringDictionary();
            keyValues.Add("First","ABC");
            keyValues.Add("Second","PQR");
            DraftMaker.CreateDraft(@"d:\FormSample1.docx", keyValues, @"d:\result.docx");

I felt happy after doing this task as it gave me good impression on the first day in vempower.
Again the same task in different company with small changes in a very new team.

I found this coincidence in more instance.
Whenever I do a pagination program in any company it made me the last program in that company....

Croos Domain

Thu, 08 May 2008 10:53:35 GMT

Cross-domain Requests

Source:http://dotnetslackers.com/columns/ajax/MashitUpwithASPNETAJAX.aspx

What is a “cross-domain” request? And when exactly do we violate the domain bounds? In general, each of the following actions generates a cross-domain request and thus is blocked by the browser:

A change in the domains. http://www.mywebsite.com cannot access http://www.yourwebsite.com.
A change in the protocol. For example, http://www.mywebsite.com cannot make a call to https://www.mywebsite.com.
A change in the port number. http://www.mywebsite.com:8080 cannot make a call to http://www.mywebsite.com:8088.
A change in the sub-domain. http://mail.mywebsite.com cannot access http://calendar.mywebsite.com.

MSDN Code Gallery

Thu, 14 Feb 2008 11:53:00 GMT

(Got info from Bdotnet forum)

MS has just launched MSDN Code Gallery is a portal for snippets, samples and other resources.

According to Somasegar,

"Code Gallery is, at its core, simply a community enabled site where we share developer enabling information and resources that will be integrated into the MSDN experience."

(Via) Somasegar’s blog - http://blogs.msdn.com/somasegar/
Src : http://code.msdn.microsoft.com/

Web Development Helper

Fri, 01 Feb 2008 04:37:01 GMT

Download this tool

http://www.nikhilk.net/Project.WebDevHelper.aspx

asp.net screen scraping

Mon, 21 Jan 2008 14:11:54 GMT

ASP.NET and the .NET framework make it unbelievably easy to retrieve web content (that’s it, whole web pages) from remote servers. You might have various reasons to retrieve remote web content, for example you might want to get the latest news headlines from popular news sites and link to them from your website.

To accomplish screen scraping in classic ASP, we had to resort to COM objects like AspHttp, ASPTear and Microsoft.XMLHTTP. The good news is that the .NET framework has built-in classes allowing getting remote web content with ease.

We are going to use 2 .NET classes found in the System.Net namespace - WebRequest and WebResponse, to get the remote web page content.

Here is how ASP.NET screen scraping works. We need to create an instance of the WebRequest class and request a web page through it. We can request either a static page (.htm, .html, .txt, etc.) or dynamic page (.asp, .aspx, .php, .pl, etc.). The type of the page we are requesting it’s not important, because we are getting what the page displays in the browser (usually HTML), not the actual page code.

After we have requested the page with our WebRequest object, we’ll have to use the WebResponse class in order to get the web page response returned by the WebRequest object.

Once we get the response into our WebResponse object, we use the System.IO.Stream (this class provides a generic view of a sequence of bytes) and System.IO.StreamReader classes to read the web page response as a text. The StreamReader class is designed to read characters from a byte stream in a particular encoding, while the Stream class is designed for byte input and output.
http://www.aspdev.org/articles/asp.net-screen-scraping/