How can I check for the checkboxes that I've dynamically created in C#

Question

This is my code. The Problem is I can get the first set of checkboxes in the checbox1_checkedChanged() but not the second set. What am I doing wrong?

    protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
    {
     CheckBox checkthatBox= (CheckBox)sender;
        if (checkthatBox.Checked)
        {
            for(int i=0; i<4; i++)
            {
                CheckBox ch = new CheckBox();
                ch.ID = "ch" + i;
                ch.Text = "site "+i;
                ch.CssClass = "listItemWidth";
                ch.AutoPostBack= true;
                ch.ViewStateMode = System.Web.UI.ViewStateMode.Enabled;
                ch.CheckedChanged += ch_CheckedChanged;
                sitesPanel.Controls.Add(ch);
            }
        }
    }

    void ch_CheckedChanged(object sender, EventArgs e)
    {
        Response.Write("YO");
        CheckBox checkthatBox = (CheckBox)sender;
        if (checkthatBox.Checked)
        {
            for (int i = 0; i < 4; i++)
            {
                CheckBox ch = new CheckBox();
                ch.ID = "dl" + i;
                ch.Text = "Document Library " + i;
                ch.CssClass = "listItemWidth";
                ch.CheckedChanged += ch_CheckedChanged;
                docLibPanel.Controls.Add(ch);
            }
        }
        throw new NotImplementedException();
    }

what is this function ch_CheckedChanged? can you make it more clear ? — yogi970, Nov 14 '14 at 07:16
That is the event handler for the checkboxes created in the CheckBox1_CheckedChanged function. I used the default one suggested by Visual Studio in the intellisense. — Akshay Halasangi, Nov 14 '14 at 07:41
what does the gererated aspx code from the top function look like? Can you show us? — martijn, Nov 14 '14 at 07:48
What's with the `throw new NotImplementedException();` bit? Is that still in your code? — SmartDev, Nov 14 '14 at 08:19

score 0 · Answer 1 · answered Nov 14 '14 at 08:26

0

It seems that Second set checkboxes are re-creating late in the page life cycle.

answered Nov 14 '14 at 08:26

Kumar Manish

3,746
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score 0 · Answer 2 · edited May 23 '17 at 10:26

0

You should create your dynamic control every time on Page_Init if you would like to access them or handle events from them after Postback.

See link below for details: http://msdn.microsoft.com/en-us/library/hbdfdyh7%28v=vs.100%29.aspx

Here you can see the same problem.

edited May 23 '17 at 10:26

Community

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1

answered Nov 14 '14 at 08:29

Pavel Timoshenko

721
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score 0 · Accepted Answer · answered Nov 14 '14 at 08:43

0

TRY setting

EnableViewState=false

of the dynamically created control

answered Nov 14 '14 at 08:43

dazzling kumar

584
1
8
17

How can I check for the checkboxes that I've dynamically created in C#

3 Answers3