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How to use Tabs in ASP.NET CORE

By Jacob
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 });             }            
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Error Provider Control in Windows Forms

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When using validation, programmer should have notify a message if there is a problem with the input entry. That notification can be shown using message box, status label control etc. The one more control to notify an error message to user is error provider control.

Error provider control can be used to display an error message, whenever the user positions the mouse pointer over the error icon. To add an error provider control, you can drag-n-drop it from the toolbox to the form. Some of the properties of this control are:
  • BlinkStyle: whether the error icon blinks or not when an error is set.
  • BlinkRate: rate at which the error icon blinks.
  • ContainerControl: contains the controls on which this control can display icons.


Here are some methods which are mostly used with error provider:
  • Clear(): clear all the errors associated with it.
  • GetError(): returns current error string for the specified control.
  • SetError(): set the error for specified control.
To set an error for a textbox when user left empty, drag-n-drop a textbox, button and an error provider control on a form. On the click event of button write following code in C# language:
if (textBox1.Text == string.Empty)
{
textBox1.Focus();
errorProvider1.SetError(textBox1, "This may not be Empty");
}
When we run the form and click on the button without writing anything in the textbox, then an error icon will blink just after the textbox with a message shown as a tool tip of the icon.

Error provider control in windows forms C#

Here in the code a method SetError() have been used, it takes two parameters, one for the control (to which error will be associated) and the second for the message to be shown. A single error provider can easily be used with more than one control.
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How to use Tabs in ASP.NET CORE

By Jacob
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 });             }            
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Polynomial representation using Linked List for Data Structure in 'C'

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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
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Print the asp.net webpage using button

By Jacob
Introduction Today i am talking about printing, and how to print the content or you can say selected content in asp.net. If you have a webpage and you want to print this then you have to choose command key (ctrl+p) for that. Also you want to print the selected part then you have to select the text first then you have to use command key. But sometimes your selected page could not printed. So many websites provide the printing facilities on the webpage. Today i am talking about the same topics here. Lets take a simple example to demonstrate the topic. Source code: <%@ Page Language="C#" AutoEventWireup="true" CodeFile="printpage.aspx.cs" Inherits="printpage" %> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head>     <title></title> <script> function printpage() { var getpanel = document.getElementById("<%= Panel1.ClientID%>"); var MainWin
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