DataGridView CheckBox Column - Show CheckBox but store String

Question

Here is my code :

public partial class Form1 : Form
{
    SqlCommandBuilder cmbl;
    string con = \"Data Source=localhost;Initial Catalog=db;Persist Security In         


        

Answer 1

You should bind the DataGridView to DataTable, then when you change a cell value or add or remove rows, the changes apply on DataTable. Then you can save data table changes using a TableAdapter:

this.dataGridView1.DataSource = dataTable;

Note: To store true/false or Yes/No values, it's better to use bit data type in sql server. But in the below example I supposed you need to store values as Y/N as nvarchar(50) and I setup a DataGridViewCheckBoxColumn to support editing a string column.

Example

Suppose we have a table Table1:

Column1: int, primary key
Column2: nvarchar(50), Allows Null, Containing Y or N as vaule

And we want to edit data of Table1 in a DataGridView:

Here is the code you can use to load and edit and save data:

private DataTable table; 
private SqlDataAdapter dataAdapter;

private void sampleForm_Load(object sender, EventArgs e)
{
    var command = "SELECT * FROM Table1";
    var connection = @"Your connection string";
    table = new DataTable();
    dataAdapter = new SqlDataAdapter(command, connection);
    var commandBuilder = new SqlCommandBuilder(dataAdapter);
    dataAdapter.Fill(table);

    //Set false as default value for Column2
    table.Columns["Column2"].DefaultValue = false;

    var column1 = new DataGridViewTextBoxColumn();
    column1.Name = "Column1";
    column1.DataPropertyName = "Column1";

    var column2 = new DataGridViewCheckBoxColumn();
    column2.Name = "Column2";
    column2.DataPropertyName = "Column2";
    column2.TrueValue = "Y";
    column2.FalseValue = "N";

    this.dataGridView1.Columns.Add(column1);
    this.dataGridView1.Columns.Add(column2);

    //Bind grid to table
    this.dataGridView1.DataSource = table;
}

private void saveButton_Click(object sender, EventArgs e)
{
    //Save data
    this.dataGridView1.EndEdit();
    dataAdapter.Update(table);
}