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 use SqlDataAdapter Class in ASP.NET

Introduction

Represents a set of data commands and a database connection that are used to fill the DataSet and update a SQL Server database(according to msdn library). You can say that retrieved table load into DataSet.

Represents a set of data commands and a database connection that are used to fill the DataSet

SqlDataAdapter class contains different parameter or non parameter constructor such as 

SqlDataAdapter( ) // you can initiate a new instance of SqlDataAdapter class.
SqlDataAdapter(SqlCommand instance) //you can specify SqlCommand instance into the SqlDataAdapter.

Lets take a simple example to take a SqlCommand instance for retrieving data from the database and these object pass to SqlDataAdapter object.

Algorithm

Step-1 : Create a SqlConnection class object  for connecting database server.

SqlConnection con = new SqlConnection();
        con.ConnectionString =ConfigurationManager.ConnectionStrings["ConnectionString"].ToString ();

        con.Open ();


Step-2 : Create a SqlCommand Object for retrieving data columns and data rows.

SqlCommand cmd = new SqlCommand();
        cmd.CommandText = "select * from deltable";

        
Step-3 : Connect SqlCommand to SqlConnection.

cmd.Connection = con;

Step-4 : Create SqlDataAdapter Object.
Step-5 : Pass SqlCommand instance to SqlDataAdapter object.

SqlDataAdapter da = new SqlDataAdapter(cmd);

Step-6 : Create DataSet Object.

DataSet ds = new DataSet();

Step-7 : Fill DataSet by SqlDataAdapter using fill( ) method.

da.Fill(ds, "deltable");

Step-8 : Bind GridView or any other datacontrol from DataSet.

  GridView1.DataSource = ds;

        GridView1.DataBind();

Complete code

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="binding.aspx.cs" Inherits="binding" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="GetData"
        Width="123px" />
    <br />
    <div>
   
        <asp:GridView ID="GridView1" runat="server">
        </asp:GridView>
   
    </div>
    </form>
</body>

</html>
Codebehind

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

public partial class binding : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        SqlConnection con = new SqlConnection();
        con.ConnectionString =ConfigurationManager.ConnectionStrings ["ConnectionString"].ToString ();
        con.Open ();

        SqlCommand cmd = new SqlCommand();
        cmd.CommandText = "select * from deltable";
        cmd.Connection = con;
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        da.Fill(ds, "deltable");
        GridView1.DataSource = ds;
        GridView1.DataBind();



    }
}
Output
How to use SqlDataAdapter Class in ASP.NET

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