C# Datagridview: get selected item in combobox columns

Question

I\'m working on a GUI that allows the user to manipulate xml files. I display the xml file in a datagridview organized neatly by columns through xml elements. I allow the us

Answer 1

A .Net combox is actually a composite control made up of a textbox and a dropdownlist. Use box.Text to get the currently displayed information.

EDIT: The row or the cell should have a .FindControl() method. You'll need to do something like:

Combobox box = (Combobox)(row.FindControl("[combobox ID]"));
string val = box.Text;

Basically, you're finding the control within its container (row or cell), then casting the control found as a combobox, then accessing its .Text property.

Answer 2

Use this to get or set selected value:

object selectedValue = currentRow.Cells["comboboxColumnName"].Value

Don't forget to set DisplayMember and ValueMember for your DataGridViewComboBoxColumn

Answer 3

I use this:

private int GetDataGridViewComboBoxCellSelectedIndex(DataGridViewCell d)
{
     return ((DataGridViewComboBoxCell)d).Items.IndexOf(d.Value);
}

Answer 4

The Control in a DataGridView is not a ComboBox, it is a DataGridViewComboBox and has different properties and methods. From MSDN

Unlike the ComboBox control, the DataGridViewComboBoxCell does not have SelectedIndex and SelectedValue properties. Instead, selecting a value from a drop-down list sets the cell Value property.

However, you mentioned that the Cell.Value is null for you. Well there may be another step you are missing according to the following article (How to: Access Objects in a Windows Forms DataGridViewComboBoxCell Drop-Down List).

You must set the DataGridViewComboBoxColumn.ValueMember or DataGridViewComboBoxCell.ValueMember property to the name of a property on your business object. When the user makes a selection, the indicated property of the business object sets the cell Value property.

Answer 5

If we have bound a datagridcomboboxcell with a different DisplayMember and ValueMember, like so:

dgcombocell.DisplayMember = "Name"; 
dgcombocell.ValueMember = "Id";  
dgcombocell.DataSource = dataset1.Tables[0];

Then for getting SelectedText, and SelectedValue, we can write this code:

string SelectedText = Convert.ToString((DataGridView1.Rows[0].Cells["dgcombocell"] as DataGridViewComboBoxCell).FormattedValue.ToString());
int SelectedVal = Convert.ToInt32(DataGridView1.Rows[0].Cells["dgcombocell"].Value);

I hope it solves your problem.

Answer 6

This is how it is done

  DataGridViewComboBoxCell comboCell = (DataGridViewComboBoxCell)dgv.Rows[0].Cells[1];

  MessageBox.Show(""+comboCell.Items.IndexOf(comboCell.Value));