Windows Forms: Insert Update Delete and View data from SQL Database using ORM Lite in C#
By FoxLearn 6/8/2017 7:17:13 PM 6.11K
Step 1: Click New Project, then select Visual C# on the left, then Windows and then select Windows Forms Application. Name your project "CRUD" and then click OK
Step 2: Right click on your project select Manage NuGet Packages -> Search metro framework, orm lite -> Install
If you don't see the metro framework in your toolbox, you can view How to download and install metro framework
Step 3: Design metro form as below
Step 4: Create a student class to map data return from sql server
[Alias("Students")] public class Student { [AutoIncrement] public int StudentID { get; set; } public string FullName { get; set; } public string Birthday { get; set; } public string Email { get; set; } public string Address { get; set; } public string ImageUrl { get; set; } public bool Gender { get; set; } }
Step 5: You should create a new database, then add a student table to your database
CREATE TABLE [dbo].[Students]( [StudentID] [int] IDENTITY(1,1) NOT NULL, [FullName] [nvarchar](100) NULL, [Birthday] [varchar](10) NULL, [Gender] [bit] NULL, [Email] [varchar](100) NULL, [Address] [nvarchar](250) NULL, [ImageUrl] [varchar](250) NULL, CONSTRAINT [PK_Students] PRIMARY KEY CLUSTERED ( [StudentID] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY]
Step 6: Create an EntityState to manage objects state
public enum EntityState { Unchanged, Added, Changed, Deleted }
Step 7: Add a connection string to the App.config file
<configuration> <connectionStrings> <add name = "cn" connectionString="Data Source=.;Initial Catalog=dbstudent;User ID=sa;Password=123@qaz;" providerName="System.Data.SqlClient"/> </connectionStrings> </configuration>
Step 8: Add code to handle your form as below
using ServiceStack.OrmLite; using System; using System.Collections.Generic; using System.ComponentModel; using System.Configuration; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace CRUD { public partial class Form1 : MetroFramework.Forms.MetroForm { EntityState objState = EntityState.Unchanged; public Form1() { InitializeComponent(); } private void btnBrowse_Click(object sender, EventArgs e) { using (OpenFileDialog ofd = new OpenFileDialog() { Filter = "JPEG|*.jpg|PNG|*.png", ValidateNames = true }) { if (ofd.ShowDialog() == DialogResult.OK) { //Load image to picture box pic.Image = Image.FromFile(ofd.FileName); Student obj = studentBindingSource.Current as Student; if (obj != null) obj.ImageUrl = ofd.FileName; } } } OrmLiteConnectionFactory dbFactory; private void Form1_Load(object sender, EventArgs e) { try { dbFactory = new OrmLiteConnectionFactory(ConfigurationManager.ConnectionStrings["cn"].ConnectionString, SqlServerDialect.Provider); using(var db = dbFactory.Open()) { //Retrieve data from sql database studentBindingSource.DataSource = db.Select<Student>(); Student obj = studentBindingSource.Current as Student; if (obj != null) { if (!string.IsNullOrEmpty(obj.ImageUrl)) pic.Image = Image.FromFile(obj.ImageUrl); } } } catch(Exception ex) { MetroFramework.MetroMessageBox.Show(this, ex.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Error); } pContainer.Enabled = false; } private void btnAdd_Click(object sender, EventArgs e) { objState = EntityState.Added; pic.Image = null; pContainer.Enabled = true; //Add new data to binding source studentBindingSource.Add(new Student()); studentBindingSource.MoveLast(); txtFullName.Focus(); } private void btnEdit_Click(object sender, EventArgs e) { objState = EntityState.Changed; pContainer.Enabled = true; txtFullName.Focus(); } private void btnDelete_Click(object sender, EventArgs e) { objState = EntityState.Deleted; if(MetroFramework.MetroMessageBox.Show(this,"Are you sure want to delete this record?", "Message", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes) { Student obj = studentBindingSource.Current as Student; if (obj != null) { using(var db = dbFactory.Open()) { //Delete data from sql database, then remove data from data source db.Delete<Student>(obj); studentBindingSource.RemoveCurrent(); pContainer.Enabled = false; pic.Image = null; objState = EntityState.Unchanged; } } } } private void metroGrid_CellClick(object sender, DataGridViewCellEventArgs e) { Student obj = studentBindingSource.Current as Student; if (obj != null) { if (!string.IsNullOrEmpty(obj.ImageUrl)) pic.Image = Image.FromFile(obj.ImageUrl); } } private void btnCancel_Click(object sender, EventArgs e) { pContainer.Enabled = false; studentBindingSource.ResetBindings(false); this.Form1_Load(sender, e); } private void btnSave_Click(object sender, EventArgs e) { try { studentBindingSource.EndEdit(); Student obj = studentBindingSource.Current as Student; if (obj != null) { using(var db = dbFactory.Open()) { //Save data to sql database if (objState == EntityState.Added) obj.StudentID = (int)db.Insert<Student>(obj, true); else if (objState == EntityState.Changed) db.Update<Student>(obj); metroGrid.Refresh(); pContainer.Enabled = false; objState = EntityState.Unchanged; } } } catch(Exception ex) { MetroFramework.MetroMessageBox.Show(this, ex.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Error); } } } }
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