Windows Forms: Insert Update Delete View and Search data from SQL Server in C#
By FoxLearn 6/1/2017 9:40:28 PM 12.35K
How to Insert Update Delete View and Search data from SQL Server in C#
Step 1: Click New Project, then select Visual C# on the left, then Windows and then select Windows Forms Application. Name your project "CRUDSqlServer" and then click OK
Step 2: Design your form as below
Step 3: Create a Customer table, then create an EF Model by using Entity Framework as below
Step 4: Add code to handle your form as below
using System; using System.Collections.Generic; using System.Data; using System.Data.Entity; using System.Data.Entity.Infrastructure; using System.Linq; using System.Windows.Forms; namespace CRUDSqlServer { public partial class Form1 : Form { TestEntities test; public Form1() { InitializeComponent(); } private void txtSearch_KeyPress(object sender, KeyPressEventArgs e) { if (e.KeyChar == (char)13)//Enter key { if (string.IsNullOrEmpty(txtSearch.Text)) { dataGridView.DataSource = customerBindingSource; } else { //using linq to query data var query = from o in customerBindingSource.DataSource as List<Customer> where o.CustomerID == txtSearch.Text || o.Fullname.Contains(txtSearch.Text) || o.Email == txtSearch.Text || o.Address.Contains(txtSearch.Text) select o; dataGridView.DataSource = query.ToList(); } } } private void btnNew_Click(object sender, EventArgs e) { try { panel.Enabled = true; txtCustomerID.Focus(); //Create a new customer, then add to binding source Customer c = new Customer(); test.Customers.Add(c); customerBindingSource.Add(c); customerBindingSource.MoveLast(); } catch (Exception ex) { MessageBox.Show(ex.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Error); } } private void btnEdit_Click(object sender, EventArgs e) { panel.Enabled = true; txtCustomerID.Focus(); } private void btnCancel_Click(object sender, EventArgs e) { panel.Enabled = false; customerBindingSource.ResetBindings(false); foreach (DbEntityEntry entry in test.ChangeTracker.Entries()) { //Check your object state switch (entry.State) { case EntityState.Added: entry.State = EntityState.Detached; break; case EntityState.Modified: entry.State = EntityState.Unchanged; break; case EntityState.Deleted: entry.Reload(); break; } } } private void btnSave_Click(object sender, EventArgs e) { try { //End edit & save data to sql database customerBindingSource.EndEdit(); test.SaveChangesAsync(); panel.Enabled = false; } catch (Exception ex) { MessageBox.Show(ex.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Error); customerBindingSource.ResetBindings(false); } } private void Form1_Load(object sender, EventArgs e) { panel.Enabled = false; test = new TestEntities(); //Load data to binding source customerBindingSource.DataSource = test.Customers.ToList(); } private void dataGridView_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.Delete) { if (MessageBox.Show("Are you sure want to delete this record ?", "Message", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes) { test.Customers.Remove(customerBindingSource.Current as Customer); customerBindingSource.RemoveCurrent(); } } } } }
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