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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 });             }            

Item add at first | 0 index After Bind ASP.NET DropDownList using c#

In this article, I will show you how to add item at 0 index after bind DropDownList in ASP.NET C#. I will give an simple example of it. First to bind the DropDownlist with the DataSource then you can use Insert method to add item at any position. Insert( ) method overloads with 4 parameters. You can use third option, in which we have two parameters first for Text and second for value.


Lets start to do:
Create a Database table with the following fields: 

CREATE TABLE [dbo].[user_table] (
    [Id]       INT           IDENTITY (1, 1) NOT NULL,
    [username] NVARCHAR (50) NULL,
    [Password] NVARCHAR (50) NULL,
    [email]    NVARCHAR (50) NULL,
    PRIMARY KEY CLUSTERED ([Id] ASC)
);

1. Add a new web form in the project.
2. Bind it with the mentioned table using SqlDataReader class. 
3. After bind you can use insert method.

using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Default9 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            binddrop();

        }
    }

    private void binddrop()
    {
        //throw new NotImplementedException();
        SqlConnection con = new SqlConnection();
        con.ConnectionString=@"Data Source=(LocalDB)\v11.0;AttachDbFilename=|DataDirectory|\emp.mdf;Integrated Security=True";
        con.Open();
        SqlCommand cmd = new SqlCommand();
        cmd.CommandText = "select * from [user_table]";
        cmd.Connection = con;
        SqlDataReader rd = cmd.ExecuteReader();
        DropDownList1.DataSource = rd;
        DropDownList1.DataTextField = "username";
        DropDownList1.DataValueField = "Id";
        DropDownList1.DataBind();
        DropDownList1.Items.Insert(0, new ListItem("Apple","5"));

    }
}

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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 });             }            

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