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public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
dataGridView1.Columns.Add("c1", "id");
dataGridView1.Columns.Add("c2", "name");
}
private void dataGridView1_RowValidating(object sender, DataGridViewCellCancelEventArgs e)
{
dataGridView1.Rows[e.RowIndex].ErrorText = "error!";
}
}