I'd like to do this:
CheckBox[] boxarray = new CheckBox[4];
boxarray[0] = checkBox1;
boxarray[1] = checkBox2;
boxarray[2] = checkBox3;
boxarray[3] = checkBox4;
using a for loop - because I have about 600 checkboxes. I thought about this:
for (int i = 0 ; i<= 600; i++)
{
boxes[i] = checkBox[i] ;
}
But whatever I tried - it didn't work. I hope you know what I mean. Thanks for your help!
If you have these CheckBoxes on your form, then you can add them to an array (or List, which would be much easier to do) like that:
List<CheckBox> checkBoxesList = new List<CheckBox>();
foreach (Control ctrl in FormName.Controls)
{
if (ctrl.GetType() == typeof(CheckBox))
{
checkBoxesList.Add(ctrl as CheckBox);
}
}
Remember, simply writing:
checkBox1, checkBox2
won't make it possible to get them like checkBox[0] - it's not an array, it's just a name with '1' or '2' in the end.
Using the current setup, you'll have to use FindControl (assuming ASP.net, winforms and WPF work differently):
for(int i = 0; i <= 600; i++)
{
boxes[i] = Page.FindControl("checkbox" + i);
}
Update for windows forms: There is actually a method you can use to find all controls of a specific type:
How to get ALL child controls of a Windows Forms form of a specific type (Button/Textbox)?
Here's another option for you. I tested it by creating a sample application, I then put a GroupBox and a GroupBox inside the initial GroupBox. Inside the nested GroupBox I put 3 TextBox controls and a button. This is the code I used (even includes the recursion you were looking for)
public IEnumerable<Control> GetAll(Control control,Type type) { var controls = control.Controls.Cast<Control>(); return controls.SelectMany(ctrl => GetAll(ctrl,type)) .Concat(controls) .Where(c => c.GetType() == type); }To test it in the form load event I wanted a count of all controls inside the initial GroupBox
private void Form1_Load(object sender, EventArgs e) { var c = GetAll(this,typeof(TextBox)); MessageBox.Show("Total Controls: " + c.Count()); }And it returned the proper count each time, so I think this will work perfectly for what you're looking for :)
If you have other checkboxes on your form that you don't want to add, you'll have to use the following method:
for(int i = 0; i <= 600; i++)
{
boxes[i] = this.Controls.Find("checkbox" + i, true).FirstOrDefault() as CheckBox;
}
you are not able to specifiy the name of the checkboxes in the code like you have done, because i wont get changed.
you have to create new instances of CheckBox like:
for (int i = 0 ; i<= 600; i++)
{
//This will create a new instance of a CheckBox
CheckBox cb = new CheckBox()
//At this point the checkbox is empty and not visible anywhere
//So you have to change some properties:
cb.Text = "Check me!";
cb.Top = Ycoord; //you should change this depending on i like +(i*30)
cb.Left = Xcoord;
cb.name = "checkbox" + i.toString();
//To recognize if one of your Checkboxes is checked/unchecked you need to add
//an event like this (for the event see down below)
cb.CheckedChanged += checkedChangedEvent;
//then you need to add the checkbox to your Array
boxes[i] = cb;
//to make those checkboxes visible you need to add them to your form
//or Panel:
myForm.Controls.Add(cb);
}
The Event:
public void checkedChangedEvent(Object sender, EventArgs e)
{
MessageBox.Show(((CheckBox)sender).name + " is now Checked == " + ((CheckBox)sender).Checked.toString();
}
you have to specify which Checkbox was Checked/Unchecked by its name, because every CheckBox is firing the same event.
EDIT2:
to get the number of the checkbox you can do something like this in the event:
int cbNumber = 0;
try
{
cbNumber = System.Convert.toInt32(((CheckBox)sender).name.Replace("checkbox",""));
}
catch (Exception ex)
{
MessageBox.Show(ex.Message + "\n\n" + ex.StackTrace);
}
boxes[]? What ischeckBox[]?