Capture selected value in grid checkbox

Question

Hello, I have the form above where it shows all the products I have registered in my database and presents in a Gride.

I put inside this Gride the option to select (checkbox). I would like you to save only the items that are "checked" from the checkbox. How can I do that?

Answer 1

You need to go through all the lines on DataGridView and check whether the CheckBox is marked in this way

foreach(DataGridViewRow linha in dgView.Rows){ // passar por todas as linhas do dg
    var cell = linha.Cells["ColunaDoCheckBox"] as DataGridViewCheckBoxCell; //pegar a celula que tem o checkbox

    if((bool)cell.Value){ //verificar se está marcado
         //salvar registro
    }
}

Answer 2

An example of how to pick up the values marked on checkbox:

List<int> codigos = new List<int>();

    if (bool.Parse(DataGridView.CurrentRow.Cells[2].FormattedValue.ToString()) == true)
    {
        foreach (DataGridViewRow check in DataGridView.Rows)
        {
            if ((bool)check.Cells[2].FormattedValue)
            {
                b = int.Parse(check.Cells[0].Value.ToString());                                               
            }
        }

        codigos.Add(b); 
    }
    else
        MessageBox.Show("Selecione um item");

Returns the codes of the selected items in checkbox.

I took from here.

See more information on how to manipulate grid checkbox here.

Answer 3

Despite the accepted answer, it may contain null and when accessing the value of it give a Nullreferenceexception, I would change your implementation to check the billed checkbox value for

DataGridViewCheckBoxCell cell;
            foreach (DataGridViewRow linha in dgView.Rows)
            {
              cell = linha.Cells["nome da coluna (ou o índice)"] as DataGridViewCheckBoxCell;// linha.Cells["nomeDaColuna"] ou linha.Cells[0]
              bool bChecked = (null != cell && null != cell.Value && true == (bool)cell.Value);
              if (bChecked)
              {
              }
           }

Answer 4

//dataGridView1 coloca o nome do seu Objeto dataGrid
foreach (DataGridViewRow Linha in dataGridView1.Rows)//Percorre o dataGrid e joga valor em 
{
    if (bool.Parse(Linha.Cells[0].EditedFormattedValue.ToString()))//Pega os valores com checkbox clicados (TRUE)
    {
     MessageBox.Show("Resultado: " + Linha.Cells[2].Value);//Faca a funcao.
    }
}