CODEWITHSUNDEEP
c#visual-studio-2008dynamic
user434753
user434753

Reputation: 43

dynamically created controls disappears when click

the dynamic controls went missing right after i click it, why is this happening, and how do i fix it.

protected void Page_Load(object sender, EventArgs e)
{
    /*DropDownList1_SelectedIndexChanged(sender, e);
    Label1.Text += "<br/>huh?";
    Label1.Text = MapPath("dawd");*/
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
    //PlaceHolder1.Controls.Clear();
    for (int i = 0; i < DropDownList1.SelectedIndex + 1; i++)
    {
        CheckBox cb = new CheckBox();
        cb.AutoPostBack = true;
        cb.CheckedChanged += new EventHandler(cb_CheckedChanged);
        PlaceHolder1.Controls.Add(cb);
        PlaceHolder1.Controls.Add(new LiteralControl("<br/>"));
    }
}

void cb_CheckedChanged(object sender, EventArgs e)
{
    //DropDownList1_SelectedIndexChanged(sender, e);
    Label1.Text += "<br/>adsd";
    //throw new NotImplementedException();
}

cheers, Jaf

Upvotes: 1

Views: 3331

Answers (2)

Wondwossen Belay Tedla
Wondwossen Belay Tedla

Reputation: 1

  • Create a panel
  • Do not create on page_load

Add this code

protected override void CreateChildControls()
{
    base.CreateChildControls();
    loadCheckbox();
}

public void loadCheckbox()
{
    int checkCount = 10;
    CheckBox[] chk = new CheckBox[checkCount];

    for(int i == 0; i<=10; i++)
    {
        chk[i] = new CheckBox();
        chk[i].ID = rCmt.cmtkey;
        chk[i].Text = rCmt.rootcommitteename;
        Panel1.Controls.Add(chk[i]);          
    }
}

Upvotes: 0

Oded
Oded

Reputation: 499402

Dynamically created controls have to be recreated in every postback, or they will not be available and non of their events will fire.

You are only ever adding the checkboxes when the dropdownlist changes, so any other postback will not add them.

It is best to create your dynamic controls on the page OnInit event.

Read about the page life cycle here.

Upvotes: 7

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