access(FindControl) dynamically created checkboxs

Question

3.00/5 (1 vote)

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Hi,

I have a listview. I have added placeholder inside <itemtemplate> of listview. I am dynamically creating checkboxed inside placeholder.

there is a button, on click of which i want to display values of all checked checkboxes. How to do this?

C#

protected void lvwFields_ItemDataBound(object sender, ListViewItemEventArgs e)
        {
            PlaceHolder plhldFields = (PlaceHolder)e.Item.FindControl("plhldFields");

            ListViewDataItem item = (ListViewDataItem)e.Item;
            DataRowView dvw = (DataRowView)item.DataItem;

            CheckBox cb = new CheckBox();

            cb.ID = dvw["Val"].ToString();
            cb.Text = dvw["Txt"].ToString();
            cb.ToolTip = dvw[ViewState["FieldName"].ToString()].ToString();

            plhldFields.Controls.Add(cb);

           showSubFields(plhldFields, dvw["fieldname"].ToString(), dvw["t"].ToString());
         }

public void showSubFields(PlaceHolder ph, string strSubFldName, string strTableName)
        {
//after executing dataset
HtmlTableRow tr = new HtmlTableRow();
                            HtmlTableCell tc = new HtmlTableCell();
                            CheckBox chk = new CheckBox();
                            HtmlGenericControl hgen = new HtmlGenericControl();
                            hgen.InnerHtml = "    ";
                            chk.ID = dsSub.Tables[0].Rows[i]["SubVal"].ToString().Trim();
                            chk.Text = dsSub.Tables[0].Rows[i]["SubTxt"].ToString().Trim();
                            chk.ToolTip = dsSub.Tables[0].Rows[i]["disp"].ToString().Trim();
                            tc.Controls.Add(hgen);
                            tc.Controls.Add(chk);
                            tr.Controls.Add(tc);
                            tbl.Controls.Add(tr);
                            ph.Controls.Add(tbl);
}

there is a button on click of that i want to display checked values

protected void btnAdd_Click(object sender, EventArgs e)
{
foreach (ListViewDataItem item in lvwFields.Items)
            {
                PlaceHolder ph = (PlaceHolder)item.FindControl("plhldFields");
                foreach (Control c in ph.Controls) //here i am getting countrols count 0
                {
                    if (c is CheckBox)
                    {

                    }
                }
            }
}

Thanks

Posted 27-May-13 23:06pm

PleaseHelpCP

Updated 27-May-13 23:56pm

v2

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Comments

IpsitaMishra 28-May-13 5:31am

can you please provide the code how you are adding the checkbox dynamically,so that it will be easier to go ahead.

Maciej Los 28-May-13 5:35am

WinForms, WebControls?

lukeer 28-May-13 5:50am

Remove the comment with the code and move the code to your question. Use the "Improve question" link for that.
Wrap the code in such tags:<pre lang="c#">YourCodeHere();</pre> to make it readable.

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Mahesh Bailwal · Accepted Answer · 2013-05-27T23:56:00

Solution 1

All dynamic controls get lost on every post back. So you need to regenerate them on every postback by rebinding your listview (best is in pageload). After that you can fetch dynamic control value from Request object like below

C#

if (c is CheckBox)
{
    var chkval = "";
    if (Request[c.UniqueID] != null)
    {
      chkval = Request[c.UniqueID];
    }
}

Posted 27-May-13 23:56pm

Mahesh Bailwal

Updated 28-May-13 0:35am

v2

Comments

PleaseHelpCP 28-May-13 8:26am

thanks Mahesh Bailwal. its working fine.