cegonsoft profile | Learn for each loop in C# .net

[bodakash]

C# also provides a foreach loop that allows you to loop through the items in a set of data. With a foreach loop, you don’t need to create an explicit counter variable. Instead, you create a variable that represents the type of data for which you’re looking. Your code will then loop until you’ve had a chance to process each piece of data in the set.

The foreach loop is particularly useful for traversing the data in collections and arrays.

Example:

string[] stringArray = {"one", "two", "three"};
foreach (string element in stringArray)
{
// This code loops three times, with the element variable set to
// "one", then "two", and then "three".
Console.Write(element + " ");
}

In this case, the foreach loop examines each item in the array and tries to convert it to a string. Thus, the foreach loop defines a string variable named element. If you used a different data type, you’d receive an error.

The foreach loop has one key limitation: it’s read-only. For example, if you wanted to loop through an array and change the values in that array at the same time, foreach code wouldn’t work.

Here’s an example:

int[] intArray = {1,2,3};
foreach (int num in intArray)
{
num += 1;
}

In this case, you would need to fall back on a basic for loop with a counter.

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[seamustaylor]

Microsoft .Net Framework is the most important and totally different factor which categorizes VB.Net into new group of programming language. CLR (Common Language Runtime) is the heart of .Net Framework and manages almost every part of .Net compliant languages. Garbage Collection is a vital concept of CLR which plays an important role in disposal and freeing up unused and hanging memory object. CLR plays an important part in memory management through Garbage Collection. Along with these features, VB.Net is extremely type safe and has error handling flexibility in more structured manner. CLS (Common Language Specification) and CTS (Common Type System) in .Net Framework introduce new data type changes and constraints which help to make VB.Net language independent. GAC (Global Assembly Cache) and Strong Name concept in VB.Net resolve the issue of naming and registration of same DLL having multiple version.
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[chicomarx]

Static/Shared classes are used when a class provides functionality which is not specific to
any instance. In short if you want an object to be shared between multiple instances you
will use a static/Shared class.

Following are features of Static/Shared classes:-

1. They cannot be instantiated. By default an object is created on the first method
call to that object.
2. Static/Shared classes cannot be inherited.
3. Static/Shared classes can have only static members.
4. Static/Shared classes can have only static constructor.


Public Class ClsShared
Shared intCount As Integer
Public Function AddCount() As Integer
intCount = intCount + 1
Return intCount
End Function
End Class

Public Class FrmSharedClasses Inherits System.Windows.Forms.Form
Private Sub CmdInstance1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CmdInstance1.Click
Dim pobjClsShared As New ClsShared()
MessageBox.Show(“The count at this moment is” & pobjClsShared.AddCount.ToString())
End Sub

Private Sub CmdInstance2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CmdInstance2.Click
Dim pobjClsShared As New ClsShared()
MessageBox.Show(“The count at this moment is” & pobjClsShared.AddCount.ToString())
End Sub
End Class

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[gabrilla]

For each loop: ARRAYS

<%@ Page Language="VB" %>
<script runat="server">
Dim ColorList(6) as String

Sub Page_Load
ColorList(0) = "Red"
ColorList(1) = "Orange"
ColorList(2) = "Yellow"
ColorList(3) = "Green"
ColorList(4) = "Blue"
ColorList(5) = "Indigo"
ColorList(6) = "Violet"
Array.Sort(ColorList)

If Not Page.IsPostback
Dim ColorName as String

For Each ColorName in ColorList
ddlColorList.Items.Add(ColorName)
Next
End If
End Sub

Sub btnSelectColor_Click(sender As Object, e As EventArgs)
lblOutputMessage.Text = "You selected " & ddlColorList.SelectedItem.Value
lblOutputMessage.ForeColor = _
System.Drawing.Color.FromName(ddlColorList.Selecte dItem.Text)
End Sub

</script>
<html>
<head>
</head>
<body>
<form runat="server">
<p>
Select a color from the list:<aspropDownList id="ddlColorList" runat="server"></aspropDownList>
<asp:Button id="btnSelectColor" onclick="btnSelectColor_Click" runat="server" Text="Click here!"></asp:Button>
</p>
<p>
<asp:Label id="lblOutputMessage" runat="server"></asp:Label>
</p>
</form>
</body>
</html>

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[jyotis016]

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[biswanathan.g]

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[arjunpktr]

It's a useful looping program
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[mithunshalom]

The foreach statement repeats a group of statements for each element in a table or a collection of objects. The foreach statement is used to iterate through the collection to obtain the desired information, but should not be used to modify the contents of the collection to avoid unpredictable side effects.

// cs_foreach.cs
class ForEachTest
{
static void Main(string[] args)
{
int[] fibarray = new int[] { 0, 1, 2, 3, 5, 8, 13 };
foreach (int i in fibarray)
{
System.Console.WriteLine(i);
}
}
}


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[madhusundar]

C# is Microsoft's new programming language for the .NET platform.
It combines some of the best features of modern programming languages such as Java, C++ or Visual Basic.
C# is an object-oriented language with single inheritance but multiple interfaces per class.
It supports component-based programming by properties (smart fields), events and delegates (enhanced function pointers).

The .NET framework created by Microsoft is a software development platform that focuses on rapid application development, platform independence and network transparency.

.NET is Microsoft's strategic initiative for server and desktop development for the next decade.
According to Microsoft, .NET includes many technologies that are designed to facilitate rapid development
of Internet and Intranet applications. .NET-connected solutions aim to enable businesses integrate their systems
more rapidly and in a more agile manner and help them realize the promise of information anytime, anywhere, on any device.


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