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I have added database table data to DataGridView in the C# Windows application form. I want to add one more column to it with Edit Button in each row. How can I do it with code?

What I have tried:

public Form1()
           SqlConnection con = new SqlConnection(@"Server= DESKTOP-AK4NH6J\SQLEXPRESS;Database=Interview;Trusted_connection=True");
           SqlCommand cmd = new SqlCommand("select * from Person", con);
           SqlDataAdapter da = new SqlDataAdapter(cmd);
           DataTable dt = new DataTable();
           dt.Columns.Add("Edit", typeof(string));
           dataGridView1.DataSource = dt;
Updated 15-Dec-22 21:22pm

1 solution

Because you are using a Datatable as the DataSource for your DGV, you can't add a column to the DGV itself - instead, you add it to the DataTable that underlies it and supplies the data: Adding Columns to a DataTable - ADO.NET | Microsoft Learn[^]
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