only select combobox if checkbox is selected in datagridview in c#

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i am working on windows form app. i m displaying my data on grid view with two extra column name, checkbox and combobox column on each row. i want when i tick checkbox it must not let me choose any thing from combobox for only that particular Row. but for rest of the rows with unselected check box i must be able to select value from combobox.

Posted 25-Feb-13 22:28pm

ByakuyaKuchiki

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Shanu2rick 26-Feb-13 4:39am

is the data coming from database?

ByakuyaKuchiki 26-Feb-13 4:41am

for combobox i have items inserted in form.
i just want to enable mean dont allow user to drop down combobox selected combobox.
and i am selecting it through ticking check box

Shanu2rick 26-Feb-13 4:46am

you just want to enable and disable the combobox using that checkbox, right?

ByakuyaKuchiki 26-Feb-13 4:44am

i have used this code. but it enable all the drop down even if i tick one check box

for (int i = 0; i <= GridView1.Rows.Count -1; i++)
{
object obj = GridView1.Rows[i].Cells[0];
if (((obj != null)))
{
DataGridViewCheckBoxCell checkBox1 = (DataGridViewCheckBoxCell)obj;
object objValue = checkBox1.Value;

if (objValue != null)
{
bool @checked = (bool)objValue;
if ((@checked))
{
//splitmethod is combobox
SplitMethod.ReadOnly = true;
}
else
{
SplitMethod.ReadOnly = false;
}

}
}
}

Shanu2rick 26-Feb-13 4:47am

on which event are you performing this action?

ByakuyaKuchiki 26-Feb-13 4:53am

GridView1_CellStateChanged

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Shanu2rick · Answer 1 · 2013-02-25T23:16:00

Solution 1

Make a little change in your code

C#

dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;

and in the GridView1_CellStateChanged event without directly applying this

C#

SplitMethod.ReadOnly = true;// it will always make the whole column readonly

try using this

C#

dataGridView1.CurrentRow.Cells[i].ReadOnly = true;//i is the column index of the combobox column

For further query feel free to ask.

Posted 25-Feb-13 23:16pm

Shanu2rick

Updated 25-Feb-13 23:27pm

v2

Comments

ByakuyaKuchiki 26-Feb-13 5:28am

this what i did but its not working.
it is enabling all the combobox now.

private void GridView1_CellStateChanged(object sender, DataGridViewCellStateChangedEventArgs e)
{for (int i = 0; i <= GridView1.Rows.Count - 1; i++)
{
object obj = GridView1.Rows[i].Cells[0];
if (((obj != null)))
{
DataGridViewCheckBoxCell checkBox1 = (DataGridViewCheckBoxCell)obj;
object objValue = checkBox1.Value;

GridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;

if (objValue != null)
{
bool @checked = (bool)objValue;
if ((@checked))
{

GridView1.CurrentRow.Cells[i].ReadOnly = true;
// SplitMethod.ReadOnly = true;//splitmethod is name for combobox
}
else
{
GridView1.CurrentRow.Cells[i].ReadOnly = false;
//SplitMethod.ReadOnly = false;
}
}
}
}
}

Shanu2rick 26-Feb-13 5:30am

dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
this line should be written in the form load event, then try it again.

ByakuyaKuchiki 26-Feb-13 5:51am

i can still select combobox.
remember it spouse to stop user to select any thing from combobox if check box is ticked.
each row has its own combo box and check box.

Shanu2rick 27-Feb-13 0:13am

then remove the for loop and place your code in CurrentCellDirtyStateChanged Event which works only on the current cell of that specific checkbox.