?
Solved

Dynamica checkboxes and how to determine checked

Posted on 2007-04-04
6
Medium Priority
?
874 Views
Last Modified: 2008-02-20
Creating an ASP.Net 1.1 page in VS.net 2003


Here's what I am doing.  I get a view of my dataset (Names, Addresses, etc).
Then I  loop through each record in order to create a check box for that user and their email addy.  This will give the end users a list of names that they can choose from in order to send their email to, check to send this person an email, uncheck not to send them the email.  
Looks a little like this

To: Joe Smith [x]
To: Sanjay Patel [x]
To: Kris Karasek [x]
To: Anna Smith [x]


for(int c=_NumberOfRecipients-1; c>-1; --c)
{
      //each row
      dr = dv.Table.Rows[c];
      //create a check box
      CheckBox chkTo = new CheckBox();
      chkTo.TextAlign= TextAlign.Left;
      chkTo.ID = dr["EmailAddress"].ToString();
      chkTo.ToolTip = dr["EmailAddress"].ToString();
      _names = "To: " + dr["FirstName"].ToString() + " " + dr["LastName"].ToString() + " ";
      chkTo.Text = _names;
      chkTo.Checked = true;
      //add the chk box to the contact panel
      iContact.Controls.Add(chkTo);
      iContact.Controls.Add(new HtmlGenericControl("BR"));
      //empty before next go round
      _names = string.Empty;
}


then on the SUBMIT button, when the user goes to send the email, i try to loop through the check boxes (created above) in the panel, to see which check boxes are checked and which are not in order to build a TO: string of email addresses, it fails to find any check boxes.

foreach (System.Web.UI.Control c in this.iContact.Controls)
{
    if ((c.GetType() == typeof(CheckBox)))
    {
        // is it a checkbox?            
        CheckBox chk = (CheckBox)c;
        if (chk.Checked == true)
        {
            //build a TO string for emailing members
          _EmailAddressesTo += chk.ID;
        }
    }
}//end for

Any help on how to get the second loop to actually access each dynamically created checkbox would be appreciated:-)

Thanks!
0
Comment
Question by:nbbit
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2
6 Comments
 
LVL 2

Expert Comment

by:balochdude
ID: 18850709
Any dynamically created controls have to be created again on postback. Thats why you cant see any checkboxes because you are not creating them again.
0
 

Author Comment

by:nbbit
ID: 18850741
balochdude: *ugh* yep, yer right

then i guess my question becomes, what is the best approach to save each checkbox and its state between posts?
0
 
LVL 2

Accepted Solution

by:
balochdude earned 1500 total points
ID: 18850903
add info to an array and either keep this info in session or viewstate.

    protected void PlaceHolder1_PreRender(object sender, EventArgs e)
    {
        if (Page.IsPostBack)
        {
            mycontrolsarray = (mycontrolsarrayayList)Session["mycontrols"];
            if (mycontrolsarray != null)
            {
                if (mycontrolsarray[intCounter] is CheckBox)
                {
                    CheckBox chk = (CheckBox)mycontrolsarray[intCounter];
                    if (Request.Form[chk.UniqueID] != null)
                    {
                        chk.Checked = true;
                    }
                    else
                    {
                        chk.Checked = false;
                    }
                    ((PlaceHolder)this.GridView1.Rows[intCounter].Cells[1].FindControl("ph1")).Controls.Add(chk);
                }
                intCounter++;
            }
        }

    }

    protected void GridView1_DataBound(object sender, EventArgs e)
    {

        Session.Add("mycontrols", mycontrolsarray);

    }
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Comment

by:nbbit
ID: 18850991
thanks for the suggestion, i'll start working to integrate it and get back to you and let you know if it works or not.  

may take me a bit, easter vacation is upon us, will try to get back to you as soon as i return
0
 

Author Comment

by:nbbit
ID: 18857414
actually, looking more closely at this, I cannot follow your example because I am in .Net 1.1 NOT 2.0+

Is there a 1.1 solution that will not only preserve the checkboxes and their names, but their state (checked or not) between posts??

TIA!
0
 

Author Comment

by:nbbit
ID: 18883800
balochdude - close enough!  you get 5 big 'uns.
take care!
0

Featured Post

Monthly Recap

May was a big month for new releases from Linux Academy! Take a look at what our team built recently in our blog. You can access the newest releases from our blog.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

IntroductionWhile developing web applications, a single page might contain many regions and each region might contain many number of controls with the capability to perform  postback. Many times you might need to perform some action on an ASP.NET po…
International Data Corporation (IDC) prognosticates that before the current the year gets over disbursing on IT framework products to be sent in cloud environs will be $37.1B.
In this video, Percona Solution Engineer Dimitri Vanoverbeke discusses why you want to use at least three nodes in a database cluster. To discuss how Percona Consulting can help with your design and architecture needs for your database and infras…
In this video, Percona Solutions Engineer Barrett Chambers discusses some of the basic syntax differences between MySQL and MongoDB. To learn more check out our webinar on MongoDB administration for MySQL DBA: https://www.percona.com/resources/we…
Suggested Courses

752 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question