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Wednesday, January 6, 2016

Replace Special character from string using Regular expression in C#

By Francis   Posted at   6:04 PM   CodeSnippets No comments
In one of the forum post, the poster asked to
  1. Remove all the special character
  2. Then Remove the space and replace with _ (underscore) character
Say for example, if he gave, the input string as “Levi Jeans (Blue) & yellow 101 – 150Ah” and the output he wants as “Levi_Jeans_Blue_yellow_101_150ah”.
Solution:

            string yourInput = "Levi Jeans (Blue) & yellow 101 - 150Ah"; 
            Regex rgx = new Regex(@"[^a-zA-Z\d\s]"); 
            // Replace Special Charater and space with emptystring 
            string finalOutput = rgx.Replace(yourInput,""); 
            Console.WriteLine(finalOutput); 
            Regex rgx1 = new Regex("\\s+"); 
            // Replace space with underscore 
            finalOutput = rgx1.Replace(finalOutput, "_");

Monday, January 4, 2016

Open Live Writer–An alternative for Windows Live writer

By Francis   Posted at   4:55 PM   Open Live Editor No comments
                          Open Live Writer

                     For the last couple of year, i have used a windows essential tool called “Windows Live Writer” for blogging. Yes! It’s made my job easier. It reduces huge amount of work regarding formatting, insert images etc., in my blog post. Literally, I’m a big fan of it.
                        But most recently, Google changed it’s authentication mode and adopt a new authentication technique. So whenever you tried to post/publish a draft you will get the below error:
WindowsLiveEditor_Issue
                         As a remedy, I Googled and Binged a lot and find an another alternative called “Open Live Writer”. You can download it from here. It’s a opensource editor, developed by a group of people inside and outside (.NetFoundation) Microsoft. If you want to participate you can get the source from: https://github.com/OpenLiveWriter/OpenLiveWriter. If you want to know about more Scott Hanselman’s post is very much helpful, which discusses removed features and features on the way in OLW etc.,

                          One of the main draw back that I found in OLW(Open Live Editor) is, it missed out the “Automatic spell check”, which I thought all bloggers love that. Another good news is you can run OLW and Windows Live Editor side by side.As a tweak for the “Spell Check Issue”, I’m still uses Windows Live Editor to draft my blog and publish it by OLW. Hope this tweak is still worth mentioning! wlEmoticon-smile[2]

Hope this post will help for someone! Smile

December Month Winner in C# Corner

By Francis   Posted at   11:37 AM   CSharpCorner No comments
                       DecemberMonthWinner


                                 I’m very much happy to announce that, I’m also one of the monthly winner in C#Corner for the month December 2015. This month award is something special to me since third time in a row, I received this award. I’m very much happy and thankful to all of my readers,friends and colleague who are all always improves me a lot!

Sunday, January 3, 2016

Got My New Year Gift : Officially CSharpCorner MVP

By Francis   Posted at   10:57 AM   MVP No comments
                              CSharpCorner_MVP_2016
                            I’m very much happy to announce that I got awarded as C# Corner MVP for 2016. I officially received a mail from C# Corner on 2nd Jan 2016. I believe this is one of my biggest milestone achievement in my carrier, since this is my first MVP award. This award really induce me more to achieve new heights within ASP.Net community. Without my family support this award is not possible, especially my Mother, Dad, “Lovely” Wife and my Son “LittleMaster” Subin. My hearty thanks to C# Corner Team, Friends and my colleagues!!! Congrats to all the other winners also,
                   Personally, I want to dedicate this award to my close “late” friend SathyaSeelan. Really i miss you Sathya, I believe you are always with me!

Friday, December 25, 2015

CRUD Operation - ASP.Net MVC with ADO.Net

By Francis   Posted at   6:58 AM   CRUD No comments
                                   
                                In this post, I’m going to discuss about the CRUD(Create, Read, Update and Delete) Operation in an ASP.Net MVC application by using raw ADO.Net. Most of the new learners, who started to learn MVC asked this frequently. That’s the main reason behind this tutorial.

Configuration:
For this particular application, I have used the below configuration:
1. Visual Studio 2015
2. SQL Server 2008
In order to keep my hand clean, I have used a simple table to do the CRUD operation.

Step 1:
Execute the below script on your DB

SET ANSI_NULLS ON 
GO

SET QUOTED_IDENTIFIER ON 
GO

SET ANSI_PADDING ON 
GO

CREATE TABLE [dbo].[tblStudent]( 
    [student_id] [int] IDENTITY(1,1) NOT NULL, 
    [student_name] [varchar](50) NOT NULL, 
    [stduent_age] [int] NOT NULL, 
    [student_gender] [varchar](6) NOT NULL, 
CONSTRAINT [PK_tblStudent] PRIMARY KEY CLUSTERED 
( 
    [student_id] ASC 
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY] 
) ON [PRIMARY]

GO

SET ANSI_PADDING OFF 
GO


Step 2:
Create an “Empty” ASP.Net.MVC 4 application in Visual Studio 2015. Empty-MVC-Project

Step 3:
Add an “Empty” Controller by right clicking on the “Controller” folder select “Add” then select “Controller..”. In the popup select “MVC 5 Controller” then click “Add”. In the next popup you should give the name of the as “CRUDController”.
Add-Empty-Controller
After add the controller, you may noticed as per the “convention” in ASP.Net MVC under the “Views” folder, a new folder named “CRUD” also created.
Convention-Over-Configuration

Step 4:
Our DB access code are going to be placed inside the “Models” folder. Model is just a “Class” file.  So we are going to create a Model class for our purpose as below:
1. Right click on the “Model” folder. In the context menu select “Add” then choose “New item..”.
2. In the popup, select “Code” then choose “Class” and name the class file as “CRUDModel” then click “Add”. That’s all!
Add-Empty-Model
Step 5:
Till now we created classes for “Controller” and “Model”. We didn’t create any views till now. In this step we are going to create a view, which is going to act as a “home” page for our application. In order to create the view:
1. Right click on the “CRUD” folder under the “Views” folder in the context menu select “Add” then choose “View..”.
2. In the popup, give “View Name” and uncheck the “Use a layout page” checkbox. Finally click “Add” button.
Add-View
Step 6:
We don’t have a controller named “Default”, which is specified in the “RouteConfig.cs” file. We need to change the controller’s name as “CRUD”, in the default route values.

Route.config:

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.Mvc; 
using System.Web.Routing;

namespace MVCWithADO 
{ 
    public class RouteConfig 
    { 
        public static void RegisterRoutes(RouteCollection routes) 
        { 
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

            routes.MapRoute( 
                name: "Default", 
                url: "{controller}/{action}/{id}", 
                defaults: new { controller = "CRUD", action = "Index", id = UrlParameter.Optional } 
            ); 
        } 
    } 
} 


After the above change, just press F5 in visual studio, to verify that our application works fine without any error.
Step 7:
In order to achieve the complete CRUD operation, I’m going to add number of views as described in the Step 5. Here is the complete list of views and it’s purpose.
View Purpose
Home.cshtml This is the default view. Loaded when the application
launched. Will display all the records in the table
Create.cshtml Displays control’s to insert the record. Will be rendered
when the “Add New Record” button clicked on
the “Home.cshtml” view.
Edit.cshtml Displays control’s to edit the record. Will be rendered
when the “Edit” button clicked on the “Home.cshtml” view.

Step 8:
The model class, contains the all the “Data Access” logic. In other words, it will interact with Database and give it back to “View” thru “Controller”.


using System.Data; 
using System.Data.SqlClient;

namespace MVCWithADO.Models 
{ 
    public class CRUDModel 
    { 
        ///  
        /// Get all records from the DB 
        ///  
        /// Datatable 
        public DataTable GetAllStudents() 
        { 
            DataTable dt = new DataTable(); 
            string strConString =@"Data Source=WELCOME-PC\SQLSERVER2008;Initial Catalog=MyDB;Integrated Security=True"; 
            using (SqlConnection con = new SqlConnection(strConString)) 
            { 
                con.Open(); 
                SqlCommand cmd = new SqlCommand("Select * from tblStudent", con); 
                SqlDataAdapter da = new SqlDataAdapter(cmd); 
                da.Fill(dt); 
            } 
            return dt; 
        }

        ///  
        /// Get student detail by Student id 
        ///  
        ///  
        ///  
        public DataTable GetStudentByID(int intStudentID) 
        { 
            DataTable dt = new DataTable();

            string strConString = @"Data Source=WELCOME-PC\SQLSERVER2008;Initial Catalog=MyDB;Integrated Security=True";

            using (SqlConnection con = new SqlConnection(strConString)) 
            { 
                con.Open(); 
                SqlCommand cmd = new SqlCommand("Select * from tblStudent where student_id=" + intStudentID, con); 
                SqlDataAdapter da = new SqlDataAdapter(cmd); 
                da.Fill(dt); 
            } 
            return dt; 
        }

        ///  
        /// Update the student details 
        ///  
        ///  
        ///  
        ///  
        ///  
        ///  
        public int UpdateStudent(int intStudentID, string strStudentName, string strGender, int intAge) 
        { 
            string strConString = @"Data Source=WELCOME-PC\SQLSERVER2008;Initial Catalog=MyDB;Integrated Security=True";

            using (SqlConnection con = new SqlConnection(strConString)) 
            { 
                con.Open(); 
                string query = "Update tblStudent SET student_name=@studname, student_age=@studage , student_gender=@gender where student_id=@studid"; 
                SqlCommand cmd = new SqlCommand(query, con); 
                cmd.Parameters.AddWithValue("@studname", strStudentName); 
                cmd.Parameters.AddWithValue("@studage", intAge); 
                cmd.Parameters.AddWithValue("@gender", strGender); 
                cmd.Parameters.AddWithValue("@studid", intStudentID); 
                return cmd.ExecuteNonQuery(); 
            } 
        }

        ///  
        /// Insert Student record into DB 
        ///  
        ///  
        ///  
        ///  
        ///  
        public int InsertStudent(string strStudentName, string strGender, int intAge) 
        { 
            string strConString = @"Data Source=WELCOME-PC\SQLSERVER2008;Initial Catalog=MyDB;Integrated Security=True";

            using (SqlConnection con = new SqlConnection(strConString)) 
            { 
                con.Open(); 
                string query = "Insert into tblStudent (student_name, student_age,student_gender) values(@studname, @studage , @gender)"; 
                SqlCommand cmd = new SqlCommand(query, con); 
                cmd.Parameters.AddWithValue("@studname", strStudentName); 
                cmd.Parameters.AddWithValue("@studage", intAge); 
                cmd.Parameters.AddWithValue("@gender", strGender); 
                return cmd.ExecuteNonQuery(); 
            } 
        }

        ///  
        /// Delete student based on ID 
        ///  
        ///  
        ///  
        public int DeleteStudent(int intStudentID) 
        { 
            string strConString = @"Data Source=WELCOME-PC\SQLSERVER2008;Initial Catalog=MyDB;Integrated Security=True";

            using (SqlConnection con = new SqlConnection(strConString)) 
            { 
                con.Open(); 
                string query = "Delete from tblStudent where student_id=@studid"; 
                SqlCommand cmd = new SqlCommand(query, con); 
                cmd.Parameters.AddWithValue("@studid", intStudentID); 
                return cmd.ExecuteNonQuery(); 
            } 
        } 
    } 
}




Controller:
Controller

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.Mvc; 
using System.Data; 
using System.Data.SqlClient; 
using MVCWithADO.Models; 
namespace MVCWithADO.Controllers 
{ 
    public class CRUDController : Controller 
    { 
        ///  
        /// First Action method called when page loads 
        /// Fetch all the rows from DB and display it 
        ///  
        /// Home View 
        public ActionResult Index() 
        { 
            CRUDModel model = new CRUDModel(); 
            DataTable dt = model.GetAllStudents(); 
            return View("Home",dt); 
        }

        ///  
        /// Action method, called when the "Add New Record" link clicked 
        ///  
        /// Create View 
        public ActionResult Insert() 
        { 
            return View("Create"); 
        }

        ///  
        /// Action method, called when the user hit "Submit" button 
        ///  
        /// Form Collection  Object 
        /// Used to differentiate between "submit" and "cancel" 
        ///  
        public ActionResult InsertRecord(FormCollection frm, string action) 
        { 
            if (action == "Submit") 
            { 
                CRUDModel model = new CRUDModel(); 
                string name = frm["txtName"]; 
                int age = Convert.ToInt32(frm["txtAge"]); 
                string gender = frm["gender"]; 
                int status = model.InsertStudent(name, gender, age); 
                return RedirectToAction("Index"); 
            } 
            else 
            { 
                return RedirectToAction("Index"); 
            } 
        }

        ///  
        /// Action method called when the user click "Edit" Link 
        ///  
        /// Student ID 
        /// Edit View 
        public ActionResult Edit(int StudentID) 
        { 
            CRUDModel model = new CRUDModel(); 
            DataTable dt = model.GetStudentByID(StudentID); 
            return View("Edit", dt); 
        }

        ///  
        /// Actin method, called when user update the record or cancel the update. 
        ///  
        /// Form Collection 
        /// Denotes the action 
        /// Home view 
        public ActionResult UpdateRecord(FormCollection frm,string action) 
        { 
            if (action == "Submit") 
            { 
                CRUDModel model = new CRUDModel(); 
                string name = frm["txtName"]; 
                int age = Convert.ToInt32(frm["txtAge"]); 
                string gender = frm["gender"]; 
                int id = Convert.ToInt32(frm["hdnID"]); 
                int status = model.UpdateStudent(id, name, gender, age); 
                return RedirectToAction("Index"); 
            } 
            else 
            { 
                return RedirectToAction("Index"); 
            } 
        }

        ///  
        /// Action method called when the "Delete" link clicked 
        ///  
        /// Stutend ID to edit 
        /// Home view 
        public ActionResult Delete(int StudentID) 
        { 
            CRUDModel model = new CRUDModel(); 
            model.DeleteStudent(StudentID); 
            return RedirectToAction("Index"); 
        } 
    } 
}



Views:
Create.cshtml


<!DOCTYPE html>

<html>    

<head>     

    <meta name="viewport" content="width=device-width" />     

    <title>Insert</title>     

</head>     

<body>     

    <form id="frmDetail" method="post" action="@Url.Action("InsertRecord")">     

        Enter Name:<input name="txtName" />     

        <br />     

        Enter Age:<input name="txtAge" />     

        <br />     

        Select Gender: <input type="radio" name="gender" value="male" checked>Male     

        <input type="radio" name="gender" value="female">Female     

        <br />     

        <input type="submit" value="Submit" name="action" />     

        <input type="submit" value="Cancel" name="action" />     

    </form>     

</body>     

</html>    

Home.cshtml:
@using System.Data    

@using System.Data.SqlClient     

@model System.Data.DataTable     

@{     

    Layout = null;     

}

<!DOCTYPE html>

<html>    

<head>     

    <meta name="viewport" content="width=device-width" />     

    <title>Home</title>     

</head>     

<body>     

    <form method="post" name="Display">     

        <h2>Home</h2>     

        @Html.ActionLink("Add New Record", "Insert")     

        <br />     

        @{     

            if (Model.Rows.Count > 0)     

            {     

                <table>     

                    <thead>     

                        <tr>     

                            <td>     

                                Student ID     

                            </td>     

                            <td>     

                                Name     

                            </td>     

                            <td>     

                                Age     

                            </td>     

                            <td>Gender</td>     

                        </tr>     

                    </thead>     

                    @foreach (DataRow dr in Model.Rows)     

                    {     

                        <tr>     

                            <td>@dr["student_id"].ToString()  </td>     

                            <td>@dr["student_name"].ToString()  </td>     

                            <td>@dr["student_age"].ToString()  </td>     

                            <td>@dr["student_gender"].ToString()  </td>     

                            <td>@Html.ActionLink("Edit ", "Edit", new { StudentID = dr["student_id"].ToString() })</td>     

                            <td>@Html.ActionLink("| Delete", "Delete", new { StudentID = dr["student_id"].ToString() })</td>     

                        </tr>     

                    }

                </table>    

                <br />     

            }     

            else     

            {     

                <span> No records found!!</span>     

            }     

            }

    </form>    

</body>     

</html>     

Edit.cshtml
@using System.Data    

@using System.Data.SqlClient     

@model System.Data.DataTable     

@{     

    ViewBag.Title = "EditView";     

}     

<html>     

<head>     

    <script type="text/javascript">     

    </script>     

</head>     

<body>     

    <form id="frmDetail" method="post" action="@Url.Action("UpdateRecord")">     

        Enter Name:<input name="txtName" value="@Model.Rows[0]["student_name"]" />     

        <br />     

        Enter Age:<input name="txtAge" value="@Model.Rows[0]["student_age"]" />     

        <br />     

        Select Gender:

        @if (Model.Rows[0]["student_gender"].ToString().ToLower() == "male")    

        {     

            <input type="radio" name="gender" value="male" checked /> @Html.Raw("Male")     

            <input type="radio" name="gender" value="female" />            @Html.Raw("Female")     

        }     

        else     

        {     

            <input type="radio" name="gender" value="male">  @Html.Raw("Male")     

            <input type="radio" name="gender" value="female" checked />            @Html.Raw("Female")     

        }     

        <input type="hidden" name="hdnID" value="@Model.Rows[0]["student_id"]" />     

        <br />     

        <input type="submit" value="Submit" name="action" />     

        <input type="submit" value="Cancel" name="action"/>     

    </form>     

</body>     

</html>   
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