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Thursday, February 9, 2012

Order By Class List<> in C#

Order by Ascending and Descending class List<> in C# :

Introduction : In this article i will explain you how to sort class collection ( List<> of class ) in linq c# . I done the easy code to understand how to uses Order by Ascending and Descending of class list in linq c#.

Class example for sorting class List<> In c#: Following is the user class example with constructor in c#. 
public class User
{
    public int UserId { get; set; }
    public string Firstname { get; set; }
    public User(int userId, string firstname)
    {
        UserId = userId;
        Firstname = firstname;
    }
}
Ascending and Descending Sorting class list in linq C#: 
List<User> UserList = new List<User>(); 

UserList.Add(new User(1, "bimal"));
UserList.Add(new User(2, "punit"));
UserList.Add(new User(3, "amit"));

UserList = UserList.OrderBy(x => x.Firstname).ToList();  //Ascending Sorted the class list using linq.
UserList = UserList.OrderByDescending(x => x.Firstname).ToList();  // Descending Sorted the class list using linq.

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Add,Update,delete DetailsView in asp.net c#

Add,Update,Delete,paging with DetailsView in asp.net c#
Introduction: In this article i will show you how to bind DetailsView in asp.net c# . I have implemented all operation like paging ,add ,edit and delete in DetailsView in asp.net c# . In following i have written the Css class to format the DetaildView.  
Html Code for DetailsView in asp.net : 
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="DetailView.aspx.cs" Inherits="HamidSite.DetailView" %>

<!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 id="Head1" runat="server">
    <title></title>
    <style type="text/css">
        .DetailsViewClass
        {
            font-family: verdana,arial,sans-serif;
            font-size: 11px;
            color: #333333;
            border-width: 1px;
            border-color: #999999;
            border-collapse: collapse;
            border-style: solid;
        }
        .Header
        {
            background: #b5cfd2;
            border-width: 1px;
            padding: 8px;
            border-style: solid;
            border-color: #999999;
        }
        .Foter
        {
            background: #dcddc0;
            border-width: 1px;
            padding: 8px;
            border-style: solid;
            border-color: #999999;
        }
        .btn
        {
            background: #ffffff;
            border-width: 1px;
            padding: 2px;
            border-style: solid;
            border-color: #999999;
            font-family: verdana,arial,sans-serif;
            font-size: 11px;
        }
        .textbox
        {
            border-width: 1px;
            padding: 1px;
            border-style: solid;
            border-color: #999999;
            font-family: verdana,arial,sans-serif;
            font-size: 11px;
            width: 100px;
        }
    </style>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:DetailsView ID="DetailsViewExample" AllowPaging="true" AutoGenerateRows="false"
            runat="server" Height="50px" CssClass="DetailsViewClass" CellPadding="4" OnPageIndexChanging="DetailsViewExample_PageIndexChanging"
            OnItemCommand="DetailsViewExample_ItemCommand1" OnItemUpdating="DetailsViewExample_ItemUpdating"
            OnModeChanging="DetailsViewExample_ModeChanging" OnItemInserting="DetailsViewExample_ItemInserting"
            Width="270px" OnItemDeleting="DetailsViewExample_ItemDeleting">
            <Fields>
                <asp:TemplateField HeaderText="First Name">
                    <ItemTemplate>
                        <asp:Label ID="lblID" Text='<%# Eval("ID") %>' Visible="false" runat="server"></asp:Label>
                        <asp:Label ID="lblFirstName" Text='<%# Eval("FirstName") %>' runat="server"></asp:Label>
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:Label ID="lblIDEdit" Text='<%# Eval("ID") %>' Visible="false" runat="server"></asp:Label>
                        <asp:TextBox ID="txtFirstname" Text='<%# Eval("FirstName") %>' runat="server" CssClass="textbox"></asp:TextBox>
                    </EditItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Last Name">
                    <ItemTemplate>
                        <asp:Label ID="lblLastName" Text='<%# Eval("LastName") %>' runat="server"></asp:Label>
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:TextBox ID="txtLastName" Text='<%# Eval("LastName") %>' runat="server" CssClass="textbox"></asp:TextBox>
                    </EditItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="City">
                    <ItemTemplate>
                        <asp:Label ID="lbldob" Text='<%# Eval("City") %>' runat="server"></asp:Label>
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:TextBox ID="txtCity" Text='<%# Eval("City") %>' runat="server" CssClass="textbox"></asp:TextBox>
                    </EditItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Address">
                    <ItemTemplate>
                        <asp:Label ID="lblAddress" Text='<%# Eval("Address") %>' runat="server"></asp:Label>
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:TextBox ID="txtAddress" Text='<%# Eval("Address") %>' runat="server" CssClass="textbox"></asp:TextBox>
                    </EditItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Pin No">
                    <ItemTemplate>
                        <asp:Label ID="lblPinNo" Text='<%# Eval("PinNo") %>' runat="server"></asp:Label>
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:TextBox ID="txtPinNo" Text='<%# Eval("PinNo") %>' runat="server" CssClass="textbox"></asp:TextBox>
                    </EditItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Mobile No">
                    <ItemTemplate>
                        <asp:Label ID="lblMobileNo" Text='<%# Eval("MobileNo") %>' runat="server"></asp:Label>
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:TextBox ID="txtMobileNo" Text='<%# Eval("MobileNo") %>' runat="server" CssClass="textbox"></asp:TextBox>
                    </EditItemTemplate>
                </asp:TemplateField>
                <asp:CommandField Visible="true" ShowInsertButton="true" ShowCancelButton="true"
                    ShowDeleteButton="true" ShowEditButton="true" />
            </Fields>
            <PagerStyle CssClass="Foter" />
            <FieldHeaderStyle Width="80px" CssClass="Header" />
        </asp:DetailsView>
    </div>
    </form>
</body>
</html>
C# Code for DetailsView in asp.net c# : 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;

namespace HamidSite
{
    public partial class DetailView : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                bindDetailtView();
            }
        }
        private void bindDetailtView()
        {
            try
            {
                DataSet Ds = GetDataSet("Select * from Employee");
                DetailsViewExample.DataSource = Ds;
                DetailsViewExample.DataBind();
            }
            catch (Exception ex) { throw ex; }
        }
        private DataSet GetDataSet(string Query)
        {
            DataSet Ds = new DataSet();
            try
            {
                string strCon = @"Data Source=ServerName;Initial Catalog=Test;Integrated Security=True";
                SqlConnection Con = new SqlConnection(strCon);
                SqlDataAdapter Da = new SqlDataAdapter(Query, Con);
                Da.Fill(Ds);

            }
            catch (Exception) { }
            return Ds;
        }
        private void ExecuteQuery(string Query)
        {
            try
            {
                string strCon = @"Data Source=ServerName;Initial Catalog=Test;Integrated Security=True";
                SqlConnection Con = new SqlConnection(strCon);
                Con.Open();
                SqlCommand cmd = new SqlCommand(Query, Con);
                cmd.ExecuteNonQuery();
                Con.Close();
            }
            catch (Exception) { }
        }
        protected void DetailsViewExample_PageIndexChanging(object sender, DetailsViewPageEventArgs e)
        {
            DetailsViewExample.PageIndex = e.NewPageIndex;
            bindDetailtView();
        }
        protected void DetailsViewExample_ItemCommand1(object sender, DetailsViewCommandEventArgs e)
        {
            switch (e.CommandName.ToString())
            {
                case "Edit":
                    DetailsViewExample.ChangeMode(DetailsViewMode.Edit);
                    bindDetailtView();
                    break;
                case "Cancel":
                    DetailsViewExample.ChangeMode(DetailsViewMode.ReadOnly);
                    bindDetailtView();
                    break;
                case "New":
                    DetailsViewExample.ChangeMode(DetailsViewMode.Insert);
                    bindDetailtView();
                    break;
            }
        }
        protected void DetailsViewExample_ModeChanging(object sender, DetailsViewModeEventArgs e)
        {
        }
        protected void DetailsViewExample_ItemUpdating(object sender, DetailsViewUpdateEventArgs e)
        {
            TextBox txtFirstname = (TextBox)DetailsViewExample.FindControl("txtFirstname");
            TextBox txtLastName = (TextBox)DetailsViewExample.FindControl("txtLastName");
            TextBox txtCity = (TextBox)DetailsViewExample.FindControl("txtCity");
            TextBox txtAddress = (TextBox)DetailsViewExample.FindControl("txtAddress");
            TextBox txtPinNo = (TextBox)DetailsViewExample.FindControl("txtPinNo");
            TextBox txtMobileNo = (TextBox)DetailsViewExample.FindControl("txtMobileNo");
            Label lblIDEdit = (Label)DetailsViewExample.FindControl("lblIDEdit");

            string Query = "Update Employee Set FirstName='" + txtFirstname.Text + "' ,LastName ='" + txtLastName.Text + "' ,City ='" + txtCity.Text + "',Address='" + txtAddress.Text + "',PinNo='" + txtPinNo.Text + "',MobileNo='" + txtMobileNo.Text + "' where ID =" + lblIDEdit.Text;
            ExecuteQuery(Query);
            DetailsViewExample.ChangeMode(DetailsViewMode.ReadOnly);
            bindDetailtView();
        }
        protected void DetailsViewExample_ItemInserting(object sender, DetailsViewInsertEventArgs e)
        {
            TextBox txtFirstname = (TextBox)DetailsViewExample.FindControl("txtFirstname");
            TextBox txtLastName = (TextBox)DetailsViewExample.FindControl("txtLastName");
            TextBox txtCity = (TextBox)DetailsViewExample.FindControl("txtCity");
            TextBox txtAddress = (TextBox)DetailsViewExample.FindControl("txtAddress");
            TextBox txtPinNo = (TextBox)DetailsViewExample.FindControl("txtPinNo");
            TextBox txtMobileNo = (TextBox)DetailsViewExample.FindControl("txtMobileNo");
            string Query = "Insert into Employee ([FirstName] ,[LastName] ,[City] ,[Address] ,[PinNo] ,[MobileNo]) values ('" + txtFirstname.Text + "' ,'" + txtLastName.Text + "' ,'" + txtCity.Text + "','" + txtAddress.Text + "','" + txtPinNo.Text + "','" + txtMobileNo.Text + "')";
            ExecuteQuery(Query);
            DetailsViewExample.ChangeMode(DetailsViewMode.ReadOnly);
            bindDetailtView();
        }
        protected void DetailsViewExample_ItemDeleting(object sender, DetailsViewDeleteEventArgs e)
        {
            Label lblID = (Label)DetailsViewExample.FindControl("lblID");
            string Query = "Delete from Employee where ID =" + lblID.Text;
            ExecuteQuery(Query);
            bindDetailtView();
        }
    }
}

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