how loop through multiple checkbox in C#

Question

I have 100 checkboxes in a winform. Their names are sequential like checkbox1, checkbox2 etc. I have a submit button in my winform. After clicking the submitting button, it checks, if a checkbox is checked then some value is updated otherwise another value is updated. I have to check 100 checkbox. So i have to loop through the 100 checkbox to check if the checkbox is checked or not.

I know how to check the checkbox

private void sumit_button_Click(object sender, EventArgs e)
{
     if (checkbox1.Checked)
     { 
        //  update 
     }
     else
     {  
        // update another  
     }

     if (checkbox2.Checked)
     {  
        //  update    
     }
     else
     {   
        // update another  
     }

     ......................and so on

}

But how can i do this for 100 checkbox???

@DanielAbouChleih-Do you have all checkboxes inside a container? — coder
– coder, Commented Sep 13, 2013 at 5:09
you may consider a datagrid control instead in which you will have a checkbox column and some other invisible column to hold the common logic for each checkbox. Then you can iterate through the rows of the datagrid. — Victor Mukherjee
– Victor Mukherjee, Commented Sep 13, 2013 at 5:12
Is there any relationship between the data to be updated and the checkbox, or can you creat an relationship? — sa_ddam213
– sa_ddam213, Commented Sep 13, 2013 at 5:14

heq · Accepted Answer · 2013-09-13 05:15:09Z

8

foreach (var control in this.Controls) // I guess this is your form
            {
                if (control is CheckBox)
                {
                    if (((CheckBox)control).Checked)
                    {
                        //update
                    }
                    else
                    {
                        //update another
                    }
                }
            }

answered Sep 13, 2013 at 5:15

heq

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Comments

coder · Accepted Answer · 2013-09-13 05:10:13Z

5

foreach (var ctrl in panel.Controls) {
    if (ctrl is CheckBox && ((CheckBox)ctrl).IsChecked) {
        //Do Something
    }
}

answered Sep 13, 2013 at 5:10

coder

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5 Comments

Daniel Abou Chleih Over a year ago

That's it. What did you mean with "Do you have all checkboxes inside a container?"?

coder Over a year ago

inside a container means a panel or a group box ?

Brian Kintz Over a year ago

Correct, but as + null check is better than is + cast (because you only have to cast once). Even better would be Controls.OfType<CheckBox>()

Daniel Abou Chleih Over a year ago

But why do ask that me?

TheTechGuy Over a year ago

Note that this is C# .NET 4 code and not compatible with older .NET

Display Name · Accepted Answer · 2013-09-13 05:17:06Z

3

There is LINQ method OfType. Why not use it to get rid of manual type testing and casting?

foreach (var ctrl in panel.Controls.OfType<CheckBox>().Where(x => x.IsChecked)
{
    // ....
}

answered Sep 13, 2013 at 5:17

Display Name

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2 Comments

doppelgreener Over a year ago

Someone did bring it up actually :)

Display Name Over a year ago

Oops... didn't notice

Joel Coehoorn · Accepted Answer · 2013-09-13 05:15:35Z

2

foreach (var box in this.Controls.OfType<CheckBox>())
{
    if (box.Checked)
    {
        //...
    }
    else
    {
        //...
    }
}

answered Sep 13, 2013 at 5:15

Joel Coehoorn

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2 Comments

ImonBayazid Over a year ago

How can i get the checkbox number to use inside the if clause. @Joel Coehoorn

Joel Coehoorn Over a year ago

@DarkenShooter You don't need it. You have a direct reference to the checkbox. If you do need that number, you're doing something wrong with your design.

Dhaval · Accepted Answer · 2013-09-13 05:14:51Z

1

    foreach (Control childc in Page.Controls)
    {

            if (childc is CheckBox)
            {
                CheckBox chk = (CheckBox)childc;
                //do your operation

            }

    }

answered Sep 13, 2013 at 5:14

Dhaval

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Comments

jeetendra singh negi · Accepted Answer · 2014-08-22 09:41:07Z

This is the write answer for this................

c#

           string movie="";
           if (checkBox1.Checked == true)
            {
                movie=movie+checkBox1.Text + ",";
            }
            if (checkBox2.Checked == true)
            {
                movie=movie+checkBox2.Text + ",";
            }
            if (checkBox3.Checked == true)
            {
                movie=movie+checkBox3.Text + ",";
            }

            if (checkBox4.Checked == true)
            {
                movie = movie + checkBox4.Text + ",";
            }
            if (checkBox5.Checked == true)
            {
                movie = movie + checkBox5.Text + ",";
            }
            if (checkBox6.Checked == true)
            {
                movie = movie + checkBox6.Text + ",";
            }
          row["EnquiryFor"] = movie.ToString();

where row is a object of DataRow and EnquiryFor is the name of sql table column....

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