c# - how to add a combo box in a datagrid view for only one cell dynamically

Question

I am reading an xml file using dataset and then i am creating a datagridview and assigning the table from dataset to datagridview.datasource dynamically. The problem i am facing here is, i want to add a combobox for one cell in datagridview.

Below is my code :

datagridview1.AllowUserToAddRows = false;
datagridview1.AllowUserToDeleteRows = false;
datagridview1.RowHeadersVisible = false;
datagridview1.AutoSizeColumnsMode =   DataGridViewAutoSizeColumnsMode.AllCells;
datagridview1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells;
datagridview1.DataMember = "";
datagridview1.DataSource = my_dataTable;
datagridview1.Columns["first name"].ReadOnly = true;
datagridview1.Columns["Second name"].Visible = false;
datagridview1.Columns["place"].Visible = false;
datagridview1.Columns["address"].Visible = false;
string[] datasource = { "add1", "add2" };
DataGridViewComboBoxCell combo = new DataGridViewComboBoxCell();
combo.DataSource = datasource;
datagridview1.Rows[2].Cells[2] = combo; 

It is giving me datagridviewcomboboxcell value is not valid error.If i give some value then it runs well but not able to see the combobox in datagridview.

Answer 1

You can use the DataSource to feed to Items, but using a simple string array will not work.

Instead you can convert the array to a List<string> :

string[] datasource = { "add1", "add2" };
DataGridViewComboBoxCell combo = new DataGridViewComboBoxCell();
combo.DataSource = datasource.ToList();
DGV.Rows[2].Cells[2] = combo; 

To set a value you can use..

combo.Value = combo.Items[0];

..after having set the cell.

For better control, especially for having spearate Display- and ValueMembers you can switch to a Dictionary or use a List<someClass>..