Skip to main content

Featured Post

How to use Tabs in ASP.NET CORE

I want to show Components in a tabs , so first of all create few components. In this project we have three components, First View Component  public class AllViewComponent : ViewComponent     {         private readonly UserManager<ApplicationUser> _userManager;         public AllViewComponent(UserManager<ApplicationUser> userManager)         {             _userManager = userManager;         }         public async Task<IViewComponentResult> InvokeAsync()         {             List<StudentViewModel> allUsers = new List<StudentViewModel>();             var items = await _userManager.Users.ToListAsync();             foreach (var item in items)             {                 allUsers.Add(new StudentViewModel {Id=item.Id, EnrollmentNo = item.EnrollmentNo, FatherName = item.FatherName, Name = item.Name, Age = item.Age, Birthdate = item.Birthdate, Address = item.Address, Gender = item.Gender, Email = item.Email });             }            

How to drag and drop items from one CheckedListBox to another in windows forms

Most of the GUI based application provides Drag-n-Drop operation. This function enables the user to drag an item from one location and drop to another location. In our previous post we have studied how to bind CheckedListBox using database. Now we will perform Drag-n-Drop operation with two CheckedListBox.


There are series of events that needs to be handled to perform this Drag-n-Drop operation, these are:

MouseDown (of source control): this event is occur when the mouse pointer is over the control and mouse button is pressed. It is beginning point of this operation, where DoDragDrop() method is called to set the data that is to be dragged.
DragEnter (of destination control): occur when mouse drag an item into area of this control. Here, we check that the desired type of data are present or not.
DragDrop (of destination control): occur when Drag-n-Drop operation completed. Here, we retrieve the dragged data and drop it.

Before we start this operation do insert some items in checkedListBox1 i.e.


string[] items = new string[] { "item 1", "item 2", "item 3", "item 4", "item 5" };

checkedListBox1.Items.AddRange(items);

Steps to perform this operation:
Step 1
            Initiate Drag-n-Drop operation for checkedListBox1 by calling DoDragDrop() method from MouseDown event of the control.


Drag-n-Drop

Step 2
            Handle the event to provide information about the operation to the user i.e. DragEnter event of checkedListBox2.


Drag-n-Drop2

Step 3
            To enable to checkedListBox2 to accept the data, set its AllowDrop property to true.
            checkedListBox2.AllowDrop = true;

Step 4
            Handle DragDrop event of checkedListBox2 to specifying what is to be done with dropped data.


DragDrop event of checkedListBox2

Download Example here.

Comments

Popular Post

Polynomial representation using Linked List for Data Structure in 'C'

Polynomial representation using Linked List The linked list can be used to represent a polynomial of any degree. Simply the information field is changed according to the number of variables used in the polynomial. If a single variable is used in the polynomial the information field of the node contains two parts: one for coefficient of variable and the other for degree of variable. Let us consider an example to represent a polynomial using linked list as follows: Polynomial:      3x 3 -4x 2 +2x-9 Linked List: In the above linked list, the external pointer ‘ROOT’ point to the first node of the linked list. The first node of the linked list contains the information about the variable with the highest degree. The first node points to the next node with next lowest degree of the variable. Representation of a polynomial using the linked list is beneficial when the operations on the polynomial like addition and subtractions are performed. The resulting polynomial can also

How to use Tabs in ASP.NET CORE

I want to show Components in a tabs , so first of all create few components. In this project we have three components, First View Component  public class AllViewComponent : ViewComponent     {         private readonly UserManager<ApplicationUser> _userManager;         public AllViewComponent(UserManager<ApplicationUser> userManager)         {             _userManager = userManager;         }         public async Task<IViewComponentResult> InvokeAsync()         {             List<StudentViewModel> allUsers = new List<StudentViewModel>();             var items = await _userManager.Users.ToListAsync();             foreach (var item in items)             {                 allUsers.Add(new StudentViewModel {Id=item.Id, EnrollmentNo = item.EnrollmentNo, FatherName = item.FatherName, Name = item.Name, Age = item.Age, Birthdate = item.Birthdate, Address = item.Address, Gender = item.Gender, Email = item.Email });             }            

Memory representation of Linked List Data Structures in C Language

                                 Memory representation of Linked List              In memory the linked list is stored in scattered cells (locations).The memory for each node is allocated dynamically means as and when required. So the Linked List can increase as per the user wish and the size is not fixed, it can vary.                Suppose first node of linked list is allocated with an address 1008. Its graphical representation looks like the figure shown below:       Suppose next node is allocated at an address 506, so the list becomes,   Suppose next node is allocated with an address with an address 10,s the list become, The other way to represent the linked list is as shown below:  In the above representation the data stored in the linked list is “INDIA”, the information part of each node contains one character. The external pointer root points to first node’s address 1005. The link part of the node containing information I contains 1007, the address of