ComboBox in DataGridView getting the value in the SelectedIndexChanged event

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ComboBox in DataGridView getting the value in the SelectedIndexChanged event

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#1 by (1 votes)
#2 by (1 votes)

2

I am working on a Windows Forms application in which I have several ComboBox in different columns of a DataGridView.

The need I have is to take the values in the event SelectedIndexChanged of each control ComboBox, I have implemented the following code.

private void dgvDetCatalogo_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
    {
        DataGridViewTextBoxEditingControl dText = e.Control as DataGridViewTextBoxEditingControl;
        if (dText != null)
        {
            dText.KeyDown -= new KeyEventHandler(dText_KeyDown);
            dText.KeyDown += new KeyEventHandler(dText_KeyDown);
        }

        if (e.Control is ComboBox)
        {
            DataGridViewComboBoxEditingControl dgvCombo = e.Control as DataGridViewComboBoxEditingControl;
            dgvCombo.SelectedIndexChanged -= new EventHandler(dgvCombo_SelectedIndexChanged);
            dgvCombo.SelectedIndexChanged += new EventHandler(dgvCombo_SelectedIndexChanged);
        }
    }

    private void dgvCombo_SelectedIndexChanged(object sender, EventArgs e)
    {
        ComboBox combo = sender as ComboBox;
        if (combo != null)
        {
            if (dgvDetCatalogo.Columns[_index].Name == "colMedida")
            {
                _cboUnidadMedida = Convert.ToInt32(combo.SelectedValue);
                MessageBox.Show($"_cboUnidadMedida: {_cboUnidadMedida}");
            }

            if (dgvDetCatalogo.Columns[_index].Name == "colImpuesto")
            {
                _cboImpuesto = Convert.ToInt32(combo.SelectedValue);
                MessageBox.Show($"_cbolImpuesto: {_cboImpuesto}");
            }
        } 
    }

The index to put it to the Row I take it from this event.

private void dgvDetCatalogo_CellClick(object sender, DataGridViewCellEventArgs e)
    {
        if (dgvDetCatalogo.CurrentRow == null)
            return;

        _index = dgvDetCatalogo.CurrentRow.Index;
    }

The _index variable is declared at the form level to be able to put it in row of the event SelectedIndexChanged

The problem that I noticed when I select another element of the ComboBox is that it does not take it if at the time of changing the element I do not press the ENTER or TAB key

Not knowing how to control that, I think the solution is to take the values of the combox in the event SelectedIndexChanged if there is another way that when you select any element of the combos the item change is confirmed.

The problem I have now is that when I select another combo from the same column or another combo from another column it gives me the following error, it deletes everything that was in that cell until the combo disappears.

The intention of what is implemented in the event SelectedIndexChanged is that I try to get the id of what I select in each ComboBox and then use it in another place. The problem is that it does not enter any condition If where I have the name of each column that is of type ComboBox, what is what I'm doing wrong?

Greetings!

c# windows-forms

asked by Pedro Ávila 30.07.2018 в 22:41

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2 answers

1

The problem you have is that you are using the index of the row rowIndex when what you really need is the index of the column ColumnIndex . On the other hand, it must be said that you can save the event CellClick since from the event SelectedIndexChanged you can access the ColumnIndex . I leave the code

private void dgvCombo_SelectedIndexChanged(object sender, EventArgs e)
    {
        ComboBox combo = sender as ComboBox;
        if (dgvDetCatalogo.CurrentRow == null)
            return;
        var _index = dgvDetCatalogo.CurrentCell.ColumnIndex;
        if (combo != null)
        {
            if (dgvDetCatalogo.Columns[_index].Name == "colMedida")
            {
                _cboUnidadMedida = Convert.ToInt32(combo.SelectedValue);
                MessageBox.Show($"_cboUnidadMedida: {_cboUnidadMedida}");
            }

            if (dgvDetCatalogo.Columns[_index].Name == "colImpuesto")
            {
                _cboImpuesto = Convert.ToInt32(combo.SelectedValue);
                MessageBox.Show($"_cbolImpuesto: {_cboImpuesto}");
            }
        }
    }

I hope it will help you, any other problem comment on it and I try to help you.

Greetings

answered by 31.07.2018 в 08:14

Recyclerview with setVisibility GONE does not delete space from the row Select non-NULL records within a CASE

score 1 · Accepted Answer

I was trying to solve it and I managed to do it with the event CurrentCellDirtyStateChanged

CurrentCellDirtyStateChanged Occurs when the state of a cell changes in relation to a change in its content.

From there, implement the following code.

private void dgvDetCatalogo_CurrentCellDirtyStateChanged(object sender, EventArgs e)
    {
        if (dgvDetCatalogo.IsCurrentCellDirty)
            dgvDetCatalogo.CommitEdit(DataGridViewDataErrorContexts.Commit);
    }

And the implementation of the event SelectedIndexChanged

is no longer necessary

Greetings!