Dotnet Tutorials ,Codings & Examples

How to Read all blob list from the Windows Azure Storage Containers

2012-01-24T12:36:00.000+05:30

Read all Blob List Names from the Windows Azure Containers

The Following snippets is used to read all the Blob list details from the azure containers

and also we can avoid the transport connection error while reading the huge blob list.

by the paging segment concept can able to read large no of blob list...

              ///////// Getting Blobs List if it's below than 5000 ///////////

             TextWriter  tw = new  StreamWriter ("d:/blob_thumblist.txt" );

             int  pagingCount = 1000;

             CloudStorageAccount  storageAccount = CloudStorageAccount .Parse(ConfigurationSettings .AppSettings["CloudStorage" ].ToString());

             CloudBlobClient  blobClient = storageAccount.CreateCloudBlobClient();

             //Get a reference to the container.

             CloudBlobContainer  container = blobClient.GetContainerReference("ContainerName" );

             ///////// Getting Blobs if's below than 5000 ///////////

             //Return blobs using a flat listing.

             BlobRequestOptions  options = new  BlobRequestOptions ();

             options.UseFlatBlobListing = true ;

             ////This first operation will return up to 5000 blobs.

             ResultSegment <IListBlobItem > resultSegment = container.ListBlobsSegmented(options);

             foreach  (var  blobItem in  resultSegment.Results)

                 //writing the blob name into the text file

                 tw.WriteLine(blobItem.Uri.Segments[2]);

             //close the stream

             tw.Close();

           ///////// Getting Blobs List if it's more  than 5000 ///////////

             TextWriter  tw = new  StreamWriter ("d:/blob_thumblist.txt" );

             int  pagingCount = 1000;

             CloudStorageAccount  storageAccount = CloudStorageAccount .Parse(ConfigurationSettings .AppSettings["CloudStorage" ].ToString());

             CloudBlobClient  blobClient = storageAccount.CreateCloudBlobClient();

             //Get a reference to the container.

             CloudBlobContainer  container = blobClient.GetContainerReference("ContainerName" );

             ///////// Getting Blobs if's more  than 5000 ///////////

             ResultContinuation  continuationToken = resultSegment.ContinuationToken;

             //Check whether there are more results and list them in pages of 1000.

             while  (continuationToken != null )

                 resultSegment = container.ListBlobsSegmented(pagingCount, continuationToken, options);

                 foreach  (var  blobItem in  resultSegment.Results)

                     //writing the blob name into the text file

                     Console .WriteLine(blobItem.Uri.Segments[2]);

                 //getting blob list count per Paging

                 Console .WriteLine(resultSegment.Results.Count());

                 //Console.ReadLine();

                 continuationToken = resultSegment.ContinuationToken;

                 //calling next set of blob list

                 resultSegment.GetNext();

              //close the stream

             tw.Close();

How to Check Azure Blob List Exist or Not

2012-01-06T17:08:00.000+05:30

Check Blob List Exist or Not

use the following snippet to check whether the blob is Exist or not

public  static  bool  Exists(this  CloudBlob  blob)

try

                 blob.FetchAttributes();

                 return  true ;

             catch  (StorageClientException  e)

                 if  (e.ErrorCode == StorageErrorCode .ResourceNotFound)

                     return  false ;

                 else

                     throw ;

Disable Browser Back Button using csharp

2011-07-21T13:23:00.001+05:30

Disable Firefox and IE Back Button in Asp.net

public void ClearBrowserCache(){ HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);

HttpContext.Current.Response.Cache.SetExpires(DateTime.Now); HttpContext.Current.Response.Cache.SetExpires(DateTime.Now.AddSeconds(-1));

HttpContext.Current.Response.Cache.SetNoStore();

}

call this method in each and every page load Event.

note:This functionality will not work when you call Server.Transfer for page redirection.

The remote certificate is invalid

2011-07-04T18:06:00.000+05:30

The remote certificate is invalid according to the validation procedure

you will get this error because of certificates issue while getting the response from the external web service or any other Web Request from the server.

follow the below snippet to resolve this issue

using System.Net;

using System.Net.Security;

using System.Security.Cryptography.X509Certificates;

protected void Page_Load(object sender, EventArgs e)

    {

      ServicePointManager.ServerCertificateValidationCallback = RemoteCertificateValidationCB;

      Uri uri = new Uri("http://microsoft.com");

      if (uri.Scheme == Uri.UriSchemeHttp)

     {

       HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(uri);

       request.Method = WebRequestMethods.Http.Get;

       HttpWebResponse response = (HttpWebResponse)request.GetResponse();

StreamReader reader = new StreamReader(response.GetResponseStream());     

       string tmp = reader.ReadToEnd();

Response.Write(tmp);

       response.Close();

               

     }

       

    }

public static bool RemoteCertificateValidationCB(Object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)

    {

        //If it is really important, validate the certificate issuer here.

        string resultsTrue = certificate.Issuer.ToString();

        //For now, accept any certificate

        return true;

    }

Insert single apostrophe in sql server varchar datatype

2011-01-05T18:49:00.000+05:30

Single Apostrophe in Sql server

If you are using SQL strings in your database , chances are you have come across problem with strings in SQL statement. One extra apostrophe screws up the SQL string, causing the SQL statement to fail.

if you insert the following query it throws the error like below

insert into emp values('gurucoder's')

Error:

Msg 102, Level 15, State 1, Line 1

Incorrect syntax near 's'.

Msg 105, Level 15, State 1, Line 1
Unclosed quotation mark after the character string ')
'.

After some googled i found the solution to solve this .putting the double apostrophe in string value

insert into emp values('gurucoder''s')

The above query with double apostrophe will insert the values like gurucoder's in database field

csproj is not installed error

2011-01-05T16:13:00.000+05:30

csproj is not installed error Make sure the application for the project type (.csproj) is installed

This error occurs when u attempt to open the old visual studio project in new Version IDE...
there is no need to reset the enviroment settings and unistall the IDE .To solve this error follow the solution

solution:

Go to Run command type the below :

devenv.exe /resetskippkgs

perhaps i'm faced this error and i used the above solution it perfectly works within a minute...............

Fibonacci Numbers

2011-01-03T16:36:00.000+05:30

Fibonacci Series:

Fibonacci examples:

The Fibonacci sequence is named after Leonardo of Pisa, who was known as Fibonacci (a contraction of filius Bonacci, "son of Bonaccio").
Fibonacci's 1202 book Liber Abaci introduced the sequence to Western European mathematics, although the sequence was independently
described in Indian mathematics and it is disputed which came first.

The sequence of number 1, 1, 2, 3, 5, 8, 13, 21, 34 . . . . each of which sum is the sum of the two previous numbers.
These numbers are also called Fibonacci numbers. The ratio of one Fibonacci to the preceding one is a Convergent of the
continued fraction.The sum of the Fibonacci Sequence can be directly obtained from Pascal's triangle.Fibonacci numbers are
named after Leonardo of Pisa, known as Fibonacci. The Fibonacci numbers are also a Lucas sequence.Fibonacci numbers can be given by,

Fn = Fn-1 + Fn-2

where, F1 = F2 = 1

F₀=	0	F₁=	1	F₂=	1	F₃=	2	F₄=	3
F₅=	5	F₆=	8	F₇=	13	F₈=	21	F₉=	34
F₁₀=	55	F₁₁=	89	F₁₂=	144	F₁₃=	233	F₁₄=	377

source : wikipedia

csharp / c# program for Fibonacci series recursive example :

class Program

{

static void Main(string[] args)

{

Program p=new Program();

Console.Write(p.Fib(14));

Console.ReadLine();

}

public int Fib(int num)

{

int res;

if (num == 1 || num == 0)

return num;

res = Fib(num - 1) + Fib(num - 2);

return res;

}

Output : 377

Jquery Pad Editor Free Tool

2010-12-29T11:55:00.000+05:30

Jquery Pad Editor Software

Jquery pad is a nice editor tool is very useful for novice jquery professionals for learning purpose and run the jquery snippets within the software....

Requirements :

dotnet framework 3.5 sp1 and above

tags:JqueryPad,jquery editor,jquery pad,jquery editor tool.

Generic Method to Populate Dropdown Data in C# | Populate Dropdown from Dataset

2010-12-21T15:03:00.000+05:30

Generic Method to Populate Dropdown Data in C# | Populate Dropdown from Dataset

how to insert the multipe records in sql server with xml data

2010-09-22T19:05:00.000+05:30

while inserting multiple records at a same time in a single transaction without failure (eg: bulk booking cinema tickets) means how to do this. for that inserting datas in sql server via xml is better.By using this we can also stop the transaction failure.................

The following example shows how to insert the multiple records using xml data

CREATE TABLE [dbo].[empinfo](
   [eno] [int] NULL,
   [ename] [varchar](50)
)
Stored procedure:

Create Procedure sp_InsertEmp

@in_XML Text
AS
Begin

DECLARE @XMLHandle AS INTEGER

Declare @temp table
(empno int,
empname varchar(20)
)
----------------------------------------------------------------
-- Initialize the XML for Processing
----------------------------------------------------------------
EXECUTE sp_xml_preparedocument
        @XMLHandle      OUTPUT
      , @in_XML

INSERT @Temp
(
      empno,
        empname
)
SELECT
   XMLInput.eno,
   XMLInput.ename
FROM OPENXML(@XMLHandle,'NewDataset/employee',2)
WITH
(
      eno int,
        ename varchar(20)
)as XMLInput

----------------------------------------------------------------
-- Close the XML
----------------------------------------------------------------
EXECUTE sp_xml_removedocument @XmlHandle

insert into empinfo(eno,ename)

select empno,empname from @temp

End

--execute stored procedure

exec sp_InsertEmp

'<NewDataset>
<employee>
<eno>101</eno>
<ename>sidhu</ename>
</employee>
</NewDataset>'

Related Question :

1) how to insert the multiple records using c# and sqlserver
2) how to To Send Multiple Rows At Once Into A Stored Procedure
3) Work with XML Data Type in SQL Server 2005 from ADO.NET 2.0

How to backup all sql server 2005 databases

2010-09-04T11:07:00.000+05:30

Backup all sql server 2005 Database using Script

DECLARE @name VARCHAR(50) -- database name   DECLARE @path VARCHAR(256) -- path for backup files   DECLARE @fileName VARCHAR(256) -- filename for backup  DECLARE @fileDate VARCHAR(20) -- used for file name  
SET @path = 'C:\Backup\'  
SELECT @fileDate = CONVERT(VARCHAR(20),GETDATE(),112) 
DECLARE db_cursor CURSOR FOR   
SELECT name FROM master.dbo.sysdatabases WHERE name NOT IN ('master','model','msdb','tempdb')  
OPEN db_cursor   FETCH NEXT FROM db_cursor INTO @name   
WHILE @@FETCH_STATUS = 0   BEGIN   
       SET @fileName = @path + @name + '_' + @fileDate + '.BAK'  
       BACKUP DATABASE @name TO DISK = @fileName  

       FETCH NEXT FROM db_cursor INTO @name    END

 
CLOSE db_cursor   DEALLOCATE db_cursor

How to validate Numeric Decimal Values using c#

2010-08-31T11:30:00.000+05:30

Decimal validation mostly used utility in the software application ..........

The Below sample code is done the numeric validation exactly.it doesn't allow the double dot in numeric values...........

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
NumericDecimalValidation(sender,e);
}

public void NumericDecimalValidation(object Sender, KeyPressEventArgs e)
{

if (char.IsDigit(e.KeyChar) || e.KeyChar.ToString() == "." || char.IsControl(e.KeyChar))
{
if (((TextBox)Sender).Text.IndexOf(".") != -1 && e.KeyChar.ToString() == ".")
e.Handled = true;
else
e.Handled = false;
}
else
e.Handled = true;
}

Creating pagination for asp.net repeater

2010-04-23T13:37:00.000+05:30

Asp.net Datalist and Repeater Pagination like Digg Style

i have upload the sample pagination application for datalist like digg....

Customize the css style whatever you want.............

sample screenshot:

Check user name Availability Using Asp.net and Jquery

2010-04-19T23:21:00.000+05:30

How to Check user name Availability Using Asp.net ,Jquery and Json ?

This Application is used to check the user name availability Asynchronously and without affect the page postback . It is done by using the little help of jquery to post the data on Change event to another page.In that page checking the username checking functionality and finally return the confirmation message.

This functionality id really helpful for user registration page.I provide the sample in a easy manner and i hope this is helpful to your development ...............

Find and count the no words using Generic Collections Dictionary

2010-04-19T21:58:00.000+05:30

Find the no of word occurences

using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;

class CountWords
{

    public void get()
    {
        string words = "The C# is Very Cool! The Best";
        string[] splitWords=words.Split(' ');

       Dictionary dic = new Dictionary();

       foreach (string str in splitWords)
       {
           if (dic.ContainsKey(str))
           {
               dic[str] = dic[str] + 1;
           }
           else
           {
               dic.Add(str, 1);
           }
       }

       foreach (KeyValuePair var in dic)
       {
           Console.WriteLine(var.Key + ":" + var.Value);
       }
    }

    static void Main()
    {
        CountWords obj = new CountWords();
        obj.get();
        Console.ReadLine();
    }
}

How to create Autocomplete textbox using Asp.net and Jquery

2010-04-19T21:06:00.000+05:30

Auto Complete TextBox Jquery,Json,Asp.net

what is Autocomplete ?

A feature that suggests text automatically based on the first few characters that a user types

I'm googling for autocomplete using Jquery and Asp.net .finally i got a nice article regarding this but the example is provided in php .Then after sometime i migrated the code into Asp.net with Generic handler and with the help of jquery and json .. This will make a asynchronous call to the server side, with no post back

download crystal reports 2005 merge modules

2009-12-09T12:57:00.000+05:30

Crystal Reports uses merge modules to verify the correct crystal report components and assemblies are installed with your deployment project.

A merge module is a set of components that are merged with a Windows installer for applications that need them. The components may include a .dll file, resources, registry entries, setup logic, and related files. With all related components stored in a single container, the installer eliminates version conflicts and other common installation problems.

Crystal reports merge modules for deployment

CrystalReportsRedist2005_x86.msm
Microsoft_VC80_ATL_x86.msm
policy_8_0_Microsoft_VC80_ATL_x86.msm

Tags: crystal reports merge modules,deployment crystal report project problem,crystal report deployment issues,download merge modules for crystal report,crystall report dll files for deployment

Detect all ip addresses on the lan network

2009-10-07T18:16:00.000+05:30

This sample application detects the all ip address and domain name on the
LAN network system.

Free Asp.net UI controls

2009-09-18T00:48:00.000+05:30

MetaBuilders WebControls Server Control Library

Here's the list of controls available

AdSense Ads - Controls to show your Google AdSense ads.
CheckedListBox - A Listbox with checkboxes for selection
ComboBox - The classic type-or-choose control.
DataControlFields - Three fields for the GridView, BooleanField for boolean values (better than the CheckBoxField), LookupField for ID/Key data to a child datasource, and SelectorField for row selection using checkboxes or radiobuttons.
DialogWindow - A set of controls which make creating dialog windows a lot easier
DualList - move items back and forth between two listboxes to select the items
DynamicListBox - a base control which stores changes to its list of items
ExpandingButtons - hide and show a target control
ExpandingPanel - hide and show the content of the panel
FileUpload - A nicer wrapper than the builtin for basic file uploading
GlobalRadioButton - A radiobutton which has a page-wide, cross-namingcontainer Group property
Grouped Lists aka GroupedListBox and GroupedDropDownList enabled support of the html option grouping in extensions of the standard data controls.
ListLink - A non-visual control which helps you create parent/child relationships between list controls
MultiFileUpload is a nice compact UI that lets the user select more than one file to upload to the server.
MultiViewBar is now free and included in the library, source and all.
OneClick - non-visual control that helps the page developer avoid the dreaded double-button-click
Polling - controls and framework for showing users simple web polls. Uses a provider framework, with built-in providers for Access and Sql Server.
ParsingContainer - control which parses a string of server control markup at runtime
QueryCall - Component which maps querystring parameters to methods in the codebehind
RemoteWindow - Easy popup windows
ResizeMonitor - causes a postback on browser-resize, if you need to keep track of dimensions in your app
RollOverLink - the old mouse-over-out effect on images, made dead-easy
RuntimeTemplate - Makes it easier to create templates for controls at runtime in code
UpDown - the classic Windows Up/Down control for numeric entry.

Programmatically Download File from Remote Location to User Through Server

2009-09-02T02:09:00.000+05:30

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Data.Sql;
using System.Net;
using System.IO;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
//base.OnLoad(e);
string url = string.Empty;// Request.QueryString["DownloadUrl"];
if (url == null || url.Length == 0)
{
url = "http://img444.imageshack.us/img444/6228/initialgridsq7.jpg";
}

//Initialize the input stream
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
int bufferSize = 1;

//Initialize the output stream
Response.Clear();
Response.AppendHeader("Content-Disposition:", "attachment; filename=download.jpg");
Response.AppendHeader("Content-Length", resp.ContentLength.ToString());
Response.ContentType = "application/download";

//Populate the output stream
byte[] ByteBuffer = new byte[bufferSize + 1];
MemoryStream ms = new MemoryStream(ByteBuffer, true);
Stream rs = req.GetResponse().GetResponseStream();
byte[] bytes = new byte[bufferSize + 1];
while (rs.Read(ByteBuffer, 0, ByteBuffer.Length) > 0)
{
Response.BinaryWrite(ms.ToArray());
Response.Flush();
}

//Cleanup
Response.End();
ms.Close();
ms.Dispose();
rs.Dispose();
ByteBuffer = null;
}
}

Get the index of the SelectedRow in a DataGridView

2009-09-02T02:08:00.000+05:30

The below codes show how to do that

private void dataGridView1_SelectionChanged(object sender, EventArgs e)
{

if (dataGridView1.SelectedRows.Count == 1)
{
txtCustcode.Text = dataGridView1.Rows[dataGridView1.SelectedRows[0].Index].Cells["CustomerCode"].Value.ToString();
}
}

Data grid view multiple checkbox selection

2009-09-02T02:02:00.001+05:30

this shows how to use datagrid view and check boxes , and find which check box was checked

for (int i = 0; i < dgGrid.Rows.Count; i++) { GridViewRow row = dgGrid.Rows[i]; bool isChecked = ((CheckBox)row.FindControl("chkSelect")).Checked; if (isChecked) { xSideID = dgGrid.Rows[i].Cells[1].Text; } }

How to read the comma seperated values from a string asp.net C#?

2009-09-01T02:12:00.001+05:30

string myString = "A, B, C, D";
string delimStr = " ,";
char[] delimiter = delimStr.ToCharArray();
foreach (string s in myString.Split(delimiter))
{
Response.Write (s.ToString ()+ "
");
}

Asp.net tips

2009-08-30T11:38:00.000+05:30

Asp.net tips for improving the development performance

click here to download

Excel Data Reader - Read Excel files in .NET

2009-08-30T11:05:00.000+05:30

Lightweight and fast library written in C# for reading Microsoft Excel files ('97-2007).
Cross-platform:
- Windows with .Net Framework 2
- Windows Mobile with Compact Framework
- Linux, OS X, BSD with Mono 2+

cllick here to download

How do I prevent a user from moving a form at run time?

2009-08-27T01:54:00.000+05:30

The following code snippet shows how you can prevent a user from moving a form at run time:

[C#]
protected override void WndProc(ref Message m)
{
const int WM_NCLBUTTONDOWN = 161;
const int WM_SYSCOMMAND = 274;
const int HTCAPTION = 2;
const int SC_MOVE = 61456;

if((m.Msg == WM_SYSCOMMAND) && (m.WParam.ToInt32() == SC_MOVE))
{
return;
}

if((m.Msg == WM_NCLBUTTONDOWN) && (m.WParam.ToInt32() == HTCAPTION))
{
return;
}

base.WndProc (ref m);
}

[VB.NET]
Protected Overrides Sub WndProc(ByRef m As Message)
const Integer WM_NCLBUTTONDOWN = 161
const Integer WM_SYSCOMMAND = 274
const Integer HTCAPTION = 2
const Integer SC_MOVE = 61456

If (m.Msg = WM_SYSCOMMAND) &&(m.WParam.ToInt32() = SC_MOVE) Then
Return
End If

If (m.Msg = WM_NCLBUTTONDOWN) &&(m.WParam.ToInt32() = HTCAPTION) Then
Return
End If

MyBase.WndProc( m)
End Sub

How do I make my child Form fill the entire mdi client without being maximized?

2009-08-27T01:48:00.000+05:30

Here is how it can be done. This takes into account all docked controls (including menus) in the mdi parent form.

[C#]
private void FillActiveChildFormToClient()
{
Form child = this.ActiveMdiChild;
Rectangle mdiClientArea = Rectangle.Empty;
foreach(Control c in this.Controls)
{
if(c is MdiClient)
mdiClientArea = c.ClientRectangle;
}
child.Bounds = mdiClientArea;
}

[VB.Net]
Private Sub FillActiveChildFormToClient()
Dim child As Form = Me.ActiveMdiChild
Dim mdiClientArea As Rectangle = Rectangle.Empty
Dim c As Control
For Each c In Me.Controls
If TypeOf c Is MdiClient Then
mdiClientArea = c.ClientRectangle
End If
Next
child.Bounds = mdiClientArea
End Sub

Avoid duplicate child form in MDI

2009-08-27T01:44:00.000+05:30

How do I check to see if a child form is already displayed so I don't have two instances showing?

// MyChildForm is the one I'm looking for

MyChildForm childForm = null;
foreach(Form f in this.MdiChildren)
{
if(f is MyChildForm)
{
// found it
childForm = (MyChildForm) f;
break;
}
}

if( childForm != null)
{
childForm.Show();
childForm.Focus();
}
else
{
childForm = new MyChildForm();
childForm.MdiParent = this;
childForm.Show();
childForm.Focus();
}

Read Pdf file using c#

2009-08-24T14:20:00.000+05:30

So you’ll have to download the PDFBox package. In this package you’ll find a bin directory. To read your PDF file, you’ll need the following files:

* IKVM.GNU.Classpath.dll
* PDFBox-0.7.3.dll
* FontBox-0.1.0-dev.dll
* IKVM.Runtime.dll

PDF Box Package is free distribution tool

You’ll have to add a reference to the first two in your project. You’ll also have to copy the last two on your project’s bin directory.

The program will look something like this (if you’re working with a Console application):

using System;
using org.pdfbox.pdmodel;
using org.pdfbox.util;
namespace PDFReader

{
class Program
{
static void Main(string[] args)
{
PDDocument doc = PDDocument.load("lopreacamasa.pdf");

PDFTextStripper pdfStripper = new PDFTextStripper();

Console.Write(pdfStripper.getText(doc));
}

}

}

read Excel file using c#

2009-08-24T14:13:00.000+05:30

How to read an Excel file with OleDb and a simple SQL query?

This approach is extremely useful when you need to read the
data from an Excel file fast and store the data in a DataTable
for further usage.

using System.Data;
using System.Data.OleDb;

...

String sConnectionString =
"Provider=Microsoft.Jet.OLEDB.4.0;" +
"Data Source=" + [Your Excel File Name Here] + ";" +
"Extended Properties=Excel 8.0;";

OleDbConnection objConn = new OleDbConnection(sConnectionString);

objConn.Open();

OleDbCommand objCmdSelect =new OleDbCommand("SELECT * FROM [Sheet1$]", objConn);

OleDbDataAdapter objAdapter1 = new OleDbDataAdapter();

objAdapter1.SelectCommand = objCmdSelect;

DataSet objDataset1 = new DataSet();

objAdapter1.Fill(objDataset1);

objConn.Close();

unicode character in C# names

2009-08-22T04:00:00.001+05:30

You can use any unicode character in C# names, for example:

public class MyClass
{
public string Hårføner()
{
return "Yes, it works!";
}
}

Using @ for variable names that are keywords.

2009-08-22T03:52:00.001+05:30

var @object = new object();
var @string = "";
var @if = IpsoFacto();

shortcut for creating properties

2009-08-22T03:50:00.000+05:30

Has anybody used "props"?

You type "prop" and then press [TAB] twice, it generates useful code for your properties and can speed your typing.

I know this works in VS 2005 (I use it) but I don´t know in previous versions.

Bind countries from CultureInfo class in C#

2009-08-22T03:25:00.001+05:30

Some people have asked me how BlogEngine.NET displays a dropdown list of countries when no source XML file is present. The simple answer is that you don’t need any external list to bind to from C#, you can instead use the CultureInfo class.

Consider that you have the following dropdown list declared in an ASP.NET page:

Then from code-behind, call this method which binds the countries alphabetically to the dropdown:

public void BindCountries()
{
System.Collections.Specialized.StringDictionary dic = new System.Collections.Specialized.StringDictionary();
System.Collections.Generic.List col = new System.Collections.Generic.List();

foreach (CultureInfo ci in CultureInfo.GetCultures(CultureTypes.AllCultures & ~CultureTypes.NeutralCultures))
{
RegionInfo ri = new RegionInfo(ci.LCID);
if (!dic.ContainsKey(ri.EnglishName))
dic.Add(ri.EnglishName, ri.TwoLetterISORegionName.ToLowerInvariant());

if (!col.Contains(ri.EnglishName))
col.Add(ri.EnglishName);
}

col.Sort();

ddlCountry.Items.Add(new ListItem("[Not specified]", ""));
foreach (string key in col)
{
ddlCountry.Items.Add(new ListItem(key, dic[key]));
}

if (ddlCountry.SelectedIndex == 0 && Request.UserLanguages != null && Request.UserLanguages[0].Length == 5)
{
ddlCountry.SelectedValue = Request.UserLanguages[0].Substring(3);
}
}

The method first adds all the countries from the CultureInfo class to a dictionary and then sorts it alphabetically. Last, it tries to retrieve the country of the browser so it can auto-select the visitors country. There might be a prettier way to sort a dictionary, but this one works.

C# coding Standards

2009-08-22T03:19:00.001+05:30

csharp coding style

2009-08-22T03:17:00.000+05:30

Tabbed MDI Dock panel

2009-08-20T10:03:00.000+05:30

It's free one

Validating ASP.NET CheckBox

2009-08-19T22:55:00.000+05:30

Dot net cheat sheets

2009-08-19T07:12:00.001+05:30

ASP.NET Page Life Cycle Diagram
(PNG)
ASP.NET Runtime Cheat Sheet
Microsoft .NET Framework 3.5 Commonly Uses Types and Namespaces
(PDF)
Visual Studio 2005 Default Keybindings
C#
|
VB
(PDF)
Visual Studio 2008 Default Keybindings
C#
|
VB
Microsoft ASP.NET AJAX Library
Microsoft ASP.NET AJAX Client Life Cycle & Events
(PDF)
LINQ
XAML/WPF
VB.NET/C# Comparison
SQL Server
HTML Character Entities
RGB Hex Color Chart
CSS
jQuery 1.2
|
jQuery 1.3
JavaScript
XHTML
(PDF)
Regular Expressions

html 5 cheat sheet

2009-08-18T11:35:00.000+05:30

HTML cheat for your reference with more options

css3 cheat sheet

2009-08-18T11:33:00.000+05:30

css3 style sheet reference for enhance web development

Difference between two dates

2009-08-18T11:22:00.001+05:30

This snippet calculates the difference between two dates.

DateTime d1 = new DateTime( 2000, 7, 13 );
DateTime d2 = new DateTime( 2003, 12, 5 );
TimeSpan s = d2 - d1;
int numberofdays = s.TotalDays

Ajax chat Application

2009-08-18T11:16:00.000+05:30

This application shows how to develop a simple AJAX chat application. It uses the ScriptManager and UpdatePanel Class to get messages stored in a SQL Server database.

Visual C# 2005 Keyboard Shortcut

2009-08-18T09:18:00.001+05:30

keyboard shorctut reference poster from Microsoft

click here

Dot net keyboard shortcuts

2009-08-18T09:14:00.000+05:30

Key board shortcut keys always help to increase your speed. So i am giving below some of the Keyboard Shortcuts which will be very useful.

Ctrl + N :- Opens the New Project Dialogue Box
Ctrl + Shift + O :- Opens the Open File Dialog Box
Ctrl + Shift + A :- Opens Add New Item window
Ctrl + D :- Opens Add Existing Item window
Ctrl + F :- Opens Find window
Ctrl + H :- Opens Find and Replace window
Ctrl + Shift + H :- Opens Replace in Files window
Ctrl + Alt + Shift + F12 :- Opens Find Symbol window
F7 :- Opens Code Designer window
Shift + F7 :- Gets you back to Design View
Ctrl + R :- Opens the Solution Explorer window
Ctrl + Alt + S :- Opens the Server Explorer window
Ctrl + Shift + C :- Opens the Class View window
F4 :- Opens the Properties window
Ctrl + Shift + E :- Opens the Resource view window
Ctrl + Alt + X :- Opens the Toolbar window
Shift + Alt + Enter :- Takes you to Full Screen View
Alt+F8 :- Opens Macro Explorer window
F2 :- Opens Object Browser window
Ctrl + Alt + T :- Opens Document Outline window
Ctrl + Alt + K :- Opens Task List window
Ctrl + Alt + A :- Opens Command window
Ctrl + Alt + O :- Opens Output window
Ctrl + Alt + Y :- Opens Find Symbol Results window
Ctrl + Alt + F :- Lists Items under the Favorites Menu in your
Ctrl + Shift + B :- Builds your project
Ctrl + Shift + F9 :- Clears All Breakpoints
Ctrl + Alt + P :- Opens the Processes Dialog box
Ctrl + T :- Opens Customize Toolbox window
Ctrl + Shift + P :- Runs Temporary Macro
Ctrl + Shift + R :- Records Temporary Macro
Alt + F11 :- Opens Macros IDE
F5 :- Runs your Application
Ctrl + F5 :- Runs your Application without Debugging
Ctrl + Alt + E :- Opens the Exceptions Dialog Box
F8 :- Used while Debugging Applications
Shift + F8 :- Used While Debugging Applications
Ctrl + B :- Inserts a New Breakpoint
F10:-Line By Line execution
Ctrl+Tab:-To Shift B/W .net Editor Pages

c# 2005 cheat sheet

2009-08-17T20:13:00.001+05:30

Store Images in Database

2009-08-14T13:48:00.001+05:30

Sample application for storing and getting images from sql server.....

click here to download

Clear all TextBox values

2009-08-14T13:42:00.000+05:30

protected void ClearControl(Control Ctrl)//passing the control
{
foreach (Control eachCtrl in Ctrl.Controls)//loop taking each controls
{
if (eachCtrl.Controls.Count > 0)
ClearControl(eachCtrl);
else if (eachCtrl is TextBox)
((TextBox)eachCtrl).Text = null;
}
}

To call the method like this:

ClearControl(this);

oops concept

2009-05-03T14:17:00.000+05:30

Why use interface ?

The following 2 examples will give bit more insight into use of interfaces. The first example explains how interface can be ploymorphically used. The second one explains how it can be used for multiple-implementation. Both the examples combined also describe a ISP or Interface Segrigation Principle.

Example 1: [Polymorphism] Suppose you have an application that writes data into different devices say HDD, FDD and CDW, in a buffered mode. Any number and any media may be used. It should also be possible plug-in/out any device any time. Each device has its own implementations. How do you ensure that this can be done without knowing the specific implementation of the device?

Solution: Lat them all implement an interface that defines common operations. The application can use the interface to make polymorphic calls.

public interface IMedia
{
void FlushData();
void OpenMedia();
void WriteData(Stream dataStream);
}

public class CDW : IMedia { ... }
public class HDD : IMedia { ... }
public class FDD : IMedia { ... }

public class DataApplication
{
CDW _cdw = new CDW(...);
HDD _hdd = new HDD(...);
FDD _fdd = new FDD(...);

IMedia _mediaDevices[] = new IMedia[] ({_cdw, _hdd, _fdd });

private void SomeDataWriteTask()
{
_cdw.WriteData(someDataStream);
_hdd.WriteData(someDataStream);
_fdd.WriteData(someDataStream);
}

private void Close()
{
foreach(IMedia mediaItem in _mediaDevices)
{
// Ploymorphic call to flush the buffered
// data into correct implementations.
mediaItem.Flush();
}
}
}

Example 2: [Multiple Implementation] Continuing the above example now suppose you have another diagnosis application that needs to check few common performance factors of these devices. The dignostic application need not know the details of these implementations. However the DataApplication (application above) should not have any knowledge of these tasks. How to do this?

Solution: Let each media implement an interface that the diagnostic application can use to operate upon. So the modified design looks like:

public interface IMedia
{
void FlushData();
void OpenMedia();
void WriteData(Stream dataStream);
}

public interface IMediaMonitor
{
long GetSeekSpeed();
long GetSizeInBytes();
void MoveToOffset(long offsetPosition);
}

public class CDW : IMedia, IMediaMonitor { ... }
public class HDD : IMedia, IMediaMonitor { ... }
public class FDD : IMedia, IMediaMonitor { ... }

public class DiagnosisApplication
{
private void DoHealthCheck(IMediaMonitor someMedia)
{
IMediaMonitor mediaDevice = someMedia;

long l1 = mediaDevice.GetSeekSpeed();
long l2 = mediaDevice.GetSizeInBytes();
mediaDevice.MoveToOffset(0);
}
}

Source : from other site..