Insert, Update, Delete query using LINQ in datagridview in C# Windows Programming? - linq

Question

Scenario: There is following controls in the form:
datagridview, textbox1, textbox2, button(save,edit,update,delete)
1.By clicking on save button, data should be updated into datagridview at run-time.
2.By selecting complete row and clicking on edit button, data should be retrieved into textboxes.
3.By clicking on Update button, that data should be updated.
4.By selecting a complete row, the row should be deleted.

Answer 1

This is my code.
I hope it will help you
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace LINQ_Test
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
LINQtestDataContext dc = new LINQtestDataContext();
public void show_data()
{
dataGridView1.DataSource = (from t in dc.LinqTests
select t);
}
public void insert_data()
{
try
{
LinqTest tbl = new LinqTest
{
ID=Convert.ToInt32(textBox_id.Text),
Name=textBox_name.Text
};
dc.LinqTests.InsertOnSubmit(tbl);
dc.SubmitChanges();
MessageBox.Show("Data Inserted!!!");
show_data();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
public void update_data()
{
try
{
LinqTest tbl = dc.LinqTests.Single(x=>x.ID==Convert.ToInt32(textBox_id.Text));
tbl.Name = textBox_new_name.Text;
dc.SubmitChanges();
MessageBox.Show("Data Updated!!!");
show_data();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
public void delete_data()
{
try
{
LinqTest tbl = dc.LinqTests.Single(x => x.ID == Convert.ToInt32(textBox_id.Text));
dc.LinqTests.DeleteOnSubmit(tbl);
dc.SubmitChanges();
MessageBox.Show("Data Deleted!!!");
show_data();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void Form1_Load(object sender, EventArgs e)
{
show_data();
}
private void button_insert_Click(object sender, EventArgs e)
{
insert_data();
}
private void button_update_Click(object sender, EventArgs e)
{
update_data();
}
private void button_delete_Click(object sender, EventArgs e)
{
delete_data();
}
}
}