Stack VS Stack(of T)

I will prefer yo use Stack(of T)  instead of Stack because it is type safe and second it will not cast object type  in to appropriate type so performance is better .

Stack:

Stack is non generic type collection from name space(system.collection)
by default it can contain  any type  means it accept system.object(every type reference or value type derived from system.object class). stack work on the principle of  LIFO(Last  in First Out) .

Module Module1

    Sub Main()
        Dim stk As New Stack
        stk.Push(1)
        stk.Push("Second")
        stk.Push(3)
        stk.Push("4th")
        Console.WriteLine("first in List")
        Console.WriteLine(stk.Peek)
        stk.Pop()
        Console.WriteLine("after deque first in List")
        Console.WriteLine(stk.Peek)
        Console.ReadLine()
    End Sub
End Module

Out Put:

first in List
4th
after deque first in List
3

Stack(of T):

Stack(of T)  is  generic type collection from name space(system.collection.generic)
 it can contain a specific type means that its type safe so that you can't insert an integer and string in same list.
Dim lst As New stack(of T)
where "T" can be integer ,string or any type.  if you will assign T as "Object" then it will work same as non generic type.Queue(of T)  work on the principle of  LIFO(Last  in First Out) .

Module Module1
    Sub Main()
        Dim stk As New Stack(Of Integer)
        stk.Push(1)
        stk.Push(2)
        stk.Push(3)
        stk.Push(4)
        Console.WriteLine("first in List")
        Console.WriteLine(stk.Peek)
        stk.Pop()
        Console.WriteLine("after deque first in List")
        Console.WriteLine(stk.Peek)
        Console.ReadLine()
    End Sub
End Module

Out Put:

first in List
4
after deque first in List
3

Queue VS Queue(of T)

I will prefer yo use Queue(of T)  instead of Queue because it is type safe and second it will not cast object type  in to appropriate type so performance is better.

Queue:

Queue is non generic type collection from name space(system.collection)
by default it can contain  any type  means it accept system.object(every type reference or value type derived from system.object class). Queue work on the principle of  FIFO(first in First Out) .it insert items like in array (one after other in sequence)

Module Module1

 Sub Main()
        Dim que As New Queue()
        que.Enqueue(1)
        que.Enqueue("Second")
        que.Enqueue(3)
        que.Enqueue("4th")
        Console.WriteLine("first in List")
        Console.WriteLine(que.Peek)
        que.Dequeue()
        Console.WriteLine("after deque first in List")
        Console.WriteLine(que.Peek)
        Console.ReadLine()
    End Sub
End Module

Out Put:

first in List
1
after deque first in List
Second

Queue(of T):

Queue(of T)  is  generic type collection from name space(system.collection.generic)
 it can contain a specific type means that its type safe so that you can't insert an integer and string in same list.
Dim lst As New Queue(of T)
where "T" can be integer ,string or any type.  if you will assign T as "Object" then it will work same as non generic type.Queue(of T) work on the principle of  FIFO(first in First Out) .it insert items like in array (one after other in sequence)

Module Module1

    Sub Main()
        Dim que As New Queue(Of Integer)
        que.Enqueue(1)
        que.Enqueue(2)
        que.Enqueue(3)
        que.Enqueue(4)
        Console.WriteLine("first in List")
        Console.WriteLine(que.Peek)
        que.Dequeue()
        Console.WriteLine("after deque first in List")
        Console.WriteLine(que.Peek)
        Console.ReadLine()
    End Sub

End Module

Out Put:

first in List
1
after deque first in List
2


I will prefer yo use Queue(of T)  instead of Queue because it is type safe and second it will not cast object type  in to appropriate type so performance is better .

Arraylist Vs List collection in VB.net

ArrayList:

arraylist is non generic type collection from name space (system.collection)
by default it can contain  any type  means it accept system.object (every type reference or value type derived from system.object class).
For Example:

Module Module1

    Sub Main()

        Dim lst As New ArrayList

        lst.Add("yousuf")

        lst.Add(2)

        Dim STR() As String = {"ashar", "kamran"}

        lst.AddRange(Str)

        For Each Obj As Object In lst

            Console.WriteLine(Obj)

        Next

        Console.ReadLine()

    End Sub

End Module

Out Put:

yousuf

2

ashar

kamran

LIST:

list is  generic type collection from name space(system.collection.generic)
 it can contain a specific type means that its type safe so that you can't insert an integer and string in same list.
Dim lst As New List(Of  T)
where "T" can be integer ,string or any type.  if you will assign T as "Object" then it will work same as non generic type.
For Example:

Module Module1

    Sub Main()

        Dim lst As New List(Of String)

        lst.Add("yousuf")

         Dim STR() As String = {"yasir", "kamran"}

        lst.AddRange(Str)

        For Each Obj As Object In lst

            Console.WriteLine(Obj)

        Next

        Console.ReadLine()

    End Sub

End Module

Out Put:

yousuf

ashar

kamran

I will prefer you to use List instead of arraylist because it is type safe and second it will not cast object type  in to appropriate type so performance is better .






 

How to apply css on RadDatePicker

Problem:

How to apply css on RadDatePicker? I am Applying css like that :

<telerik:RadDatePicker ID="RadDatePicker1" Runat="server" Culture="en-US"
CssClass="txt_box">
</telerik:RadDatePicker>

but is not working, it is giving me unwanted results.

Solution:

You should use "DateInput" tag in RadDatePicker. for example:

<telerik:RadDatePicker ID="RadDatePicker1" Runat="server" Culture="en-US">
       <DateInput CssClass="txt_box">
       </DateInput>
</telerik:RadDatePicker>

Find Label Control from Item Temple of RadGrid

Problem:

I am using GridTemplateColumn in RadGrid and I want find the label control which is in grid's ItemTemplate to update record.

I am using this code in grid's updatecommand,

VB CODE:

Dim Label1 As Label = CType(e.Item.FindControl("Label1"), Label)

but control is not found thus there is (nothing) in Label1.

Solution:

Try this,

VB CODE:

Dim Label1 As Label = DirectCast(CType(e.Item, GridEditFormItem).OwnerTableView.Items(e.Item.ItemIndex).FindControl("Label1"), Label)