about DataGridViewCom boBoxCell

[aXqd]

i want a editable comboboxcell for a datagridview, i have done these:

[dgvConfigShow is a DataGridView]

public partial class Form1 : Form
{
....
private static List<string_tem pList = new List<string>(ne w string[]
{});
....
private void lbTypes_Selecte dIndexChanged(o bject sender, EventArgs e)
{
foreach(...)
{
int newRowIndex = dgvConfigShow.R ows.Add();
DataGridViewRow newRow = dgvConfigShow.R ows[newRowIndex];

DataGridViewCel l dgvcellCategory Name =
newRow.Cells["dgvcolCategory Name"];
dgvcolCategoryN ame.DataSource = _tempList;
}
}
....
private void dgvConfigShow_E ditingControlSh owing(object sender,
DataGridViewEdi tingControlShow ingEventArgs e)
{
DataGridViewCom boBoxEditingCon trol comboControl = e.Control as
DataGridViewCom boBoxEditingCon trol;
if (comboControl != null)
if (comboControl.D ropDownStyle != ComboBoxStyle.D ropDown)
comboControl.Dr opDownStyle = ComboBoxStyle.D ropDown;
}
....
private void dgvConfigShow_C ellValidating(o bject sender,
DataGridViewCel lValidatingEven tArgs e)
{
DataGridViewCom boBoxCell cell = dgvConfigShow.C urrentCell as
DataGridViewCom boBoxCell;
if (cell == null) return;

string curVal = e.FormattedValu e as string;
if (!String.IsNull OrEmpty(curVal) && !_tempList.Cont ains(curVal))
_tempList.Add(c urVal);

cell.Value = curVal;
}
....
}

everything goes fine until i try this:

input "a" into row 1 <-_tempList = ["a"]

input "b" into row 2 <-_tempList = ["a", "b"]

input "a" into row 1 <-_tempList = ["a", "b"]

input/select "b" on row 1 <-_tempList = ["a", "b"] but meanwhile
raised the well-known exception (DataGridViewCo mboBoxCell: Value is
not valid)

any idea, please?

[aXqd]

On 3ÔÂ17ÈÕ, ÏÂÎç11ʱ58·Ö, "aXqd" <axqd...@gmail. comwrote:

i want a editable comboboxcell for a datagridview, i have done these:

[dgvConfigShow is a DataGridView]

public partial class Form1 : Form
{
...
private static List<string_tem pList = new List<string>(ne w string[]
{});
...
private void lbTypes_Selecte dIndexChanged(o bject sender, EventArgs e)
{
foreach(...)
{
int newRowIndex = dgvConfigShow.R ows.Add();
DataGridViewRow newRow = dgvConfigShow.R ows[newRowIndex];

DataGridViewCel l dgvcellCategory Name =
newRow.Cells["dgvcolCategory Name"];
dgvcolCategoryN ame.DataSource = _tempList;}
}

...
private void dgvConfigShow_E ditingControlSh owing(object sender,
DataGridViewEdi tingControlShow ingEventArgs e)
{
DataGridViewCom boBoxEditingCon trol comboControl = e.Control as
DataGridViewCom boBoxEditingCon trol;
if (comboControl != null)
if (comboControl.D ropDownStyle != ComboBoxStyle.D ropDown)
comboControl.Dr opDownStyle = ComboBoxStyle.D ropDown;}

...
private void dgvConfigShow_C ellValidating(o bject sender,
DataGridViewCel lValidatingEven tArgs e)
{
DataGridViewCom boBoxCell cell = dgvConfigShow.C urrentCell as
DataGridViewCom boBoxCell;
if (cell == null) return;

string curVal = e.FormattedValu e as string;
if (!String.IsNull OrEmpty(curVal) && !_tempList.Cont ains(curVal))
_tempList.Add(c urVal);

cell.Value = curVal;

}
...
}

everything goes fine until i try this:

input "a" into row 1 <-_tempList = ["a"]

input "b" into row 2 <-_tempList = ["a", "b"]

input "a" into row 1 <-_tempList = ["a", "b"]

input/select "b" on row 1 <-_tempList = ["a", "b"] but meanwhile
raised the well-known exception (DataGridViewCo mboBoxCell: Value is
not valid)

any idea, please?

what i want is the datagridviewcom boboxcells of each row share the
same datasource, and each one of them is able to add items into the
common datasource by typing into/select the combobox.