Is it possible to find out if a cell is checked or unchecked in the datagridviewcheckbox column and then use the results in a if statement?
I'm using c#
thanks,
Byran |
| Krossley Monday, July 28, 2008 3:12 PM |
Ok, I've installedC# Express. This works:
Code Snippet
if ((bool)this.dataGridView1.Rows[0].Cells[0].Value == true)
MessageBox.Show(this.dataGridView1.Rows[0].Cells[0].Value.ToString());//should print "true"
|
| Lucian Baciu Tuesday, July 29, 2008 12:54 PM |
Hi!
If the first row, first columnis the one containing checkboxe:
Code Snippet
if (this.dataGridView1.Rows[0].Cells[0].Value == true)
//assume checked
|
| Lucian Baciu Monday, July 28, 2008 3:21 PM |
Thanks for the reply but I get this error when i try to use the code.
Operator '==' cannot be applied to operands of type 'object' and 'bool'
any ideas?
Bryan |
| Krossley Monday, July 28, 2008 10:20 PM |
Do you check the right row?You have to specify the exact position where a checkbox is. |
| Lucian Baciu Tuesday, July 29, 2008 7:48 AM |
the check box is on every row and the second cell over from the left. I have Row[0] and Cell[1] I have also tride different combinations. The datagridview is databound to source does this matter?
Thanks,
Bryan |
| Krossley Tuesday, July 29, 2008 11:27 AM |
I'm sorry I do not have a Visual Studio installed here, but can you try this?:
Code Snippet
if (this.dataGridView1.Rows[0].Cells[0].Value.ToString()== "true")
MessageBox.Show(this.dataGridView1.Rows[0].Cells[0].Value.ToString());//should print "true"
Do you still get the error? |
| Lucian Baciu Tuesday, July 29, 2008 11:54 AM |
Here is what I get now.
error
Object reference not set to an instance of an object. |
| Krossley Tuesday, July 29, 2008 12:01 PM |
Then you're refering to a cell that it does not exist. Check to be in an existing cell. |
| Lucian Baciu Tuesday, July 29, 2008 12:03 PM |
I think I need to see if the cell is null before calling. How do I do that.
Bryan
|
| Krossley Tuesday, July 29, 2008 12:24 PM |
Ok, I've installedC# Express. This works:
Code Snippet
if ((bool)this.dataGridView1.Rows[0].Cells[0].Value == true)
MessageBox.Show(this.dataGridView1.Rows[0].Cells[0].Value.ToString());//should print "true"
|
| Lucian Baciu Tuesday, July 29, 2008 12:54 PM |
Ok that worked. I am still have some problem getting everything to work. I have a dataGridView with a checkbox when the user checks the checkbox I have the cellclick event fire off to the database and change the column to true which works as expected but the the user clicks the checkbox again to remove the check the cellclick event does not update to false. I am posting my code.
Thanks,
Bryan
Code Snippet
private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
DataGridView dgv1 = new DataGridView();
string idstring = dataGridView1.SelectedRows[0].Cells["COIN_ID"].Value.ToString();
int parseid = Int32.Parse(idstring);
int id = Convert.ToInt32(parseid);
var dataContext = new LINQTESTDataContext();
COPPER check = dataContext.COPPERs.SingleOrDefault(c => c.COIN_ID == id);
if ((bool)this.dataGridView1.Rows[0].Cells[1].Value == false)
check.CheckBox = true;
else if ((bool)this.dataGridView1.Rows[0].Cells[1].Value == true)
check.CheckBox = false;
textBox1.Text = idstring;
dataContext.SubmitChanges();
}
|
| Krossley Wednesday, July 30, 2008 1:39 PM |
Please post this in another thread. One question per thread please.
Regards, |
| Lucian Baciu Wednesday, July 30, 2008 1:48 PM |
hi, i am also facing the similar problem. My code is here below :
for (int i = 0; i < dataGriedView1.Rows.Count; i++)
{
if ((bool)this.dataGriedView1.Rows[i].Cells[0].Value == false)
MessageBox.Show(this.dataGriedView1.Rows[i].Cells[0].Value.ToString());
}
I'm getting error :
Nullreferenceexception was unhandeled.
Object reference not set to an instance of an object.
Please help.
|
| GauravKapoor Sunday, March 08, 2009 9:00 AM |
index > Windows Forms Data Controls and Databinding > Checked Status DataGridViewCheckBox