how to check if a check box created in runtime checked or not?
I have a webform that have mutiple collectios of check boxes created on run time ( database driven)
what is the best way to loop between them and get which ones has been checked by a user and save the results back to the database
below a portion of my code. i am adding the checkbox to cell table which added to a row, then to a table, finlally the table added to a place holder
while (drProfileList.Read()){
HtmlTableRow tr = new HtmlTableRow(); HtmlTableCell tc = new HtmlTableCell();CheckBox chkbox = new CheckBox();chkbox.ID = drProfileList[
"RoleID"].ToString();chkbox.Text = drProfileList["RoleName"].ToString();tc.Controls.Add(chkbox);
tr.Cells.Add(tc);
tblExtProfile.Rows.Add(tr);
}
phExternal.Controls.Add(tblExtProfile);
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aramadan66
9/21/2008 1:25:37 AM
asp.net.web-forms
93655 articles. 
6 followers.
6 Replies
1115 Views
foreach(control c in page.controls)
{
if( c is checkbox)
checkbox x =(checbkox)c;
if(c.checked)
blablbla
}
Don't forget to click "Mark as Answer" on the post that helped you.
Luis Esteban Valencia - Medellin - Colombia
http://wantmvp.blogspot.com/
MCP, MCTS SQL 2006, MCTS WEB APP, MCTS WINFORMS, MCTS DISTRIBUTED, NEXT MCPD ENTERPRISE APPLICATION DEVELOPER
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levalencia
9/21/2008 1:42:28 AM
Thanks, i tried teh way that you suggest, it did not work, keep in mind that all of these check boxex created dynamically.
do i have to add some attribute like runat="server"? am i not sure what i am missing
can yo please help
thanks
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aramadan66
9/21/2008 3:41:50 AM
It won't work because your checkboxes are not persisted when you postback the data. YOu could do this the proper way by saving your checkboxes in the viewstate on the pre-render method of the page, or a quick way is use the Request.Form object to loop through your checkboxes. You would have to name your checkboxes with some form of identification to make it easier. For example, append your id with a "_cb" so that when you loop though the Request.Form dictionary, everytime you find a name if a "_cb" you would know that this is a checkbox and to just grab the value.
foreach (string key in Request.Form.Keys)
{
if (key.Contains("_cb"))
{
string val = Request.Form[key];
// do some more
}
}
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ed_ajax_guy
9/21/2008 4:04:46 AM
thanks, can you an example for how to use viewstate
this the way i am creating the checkbox in runtime with the page load event
really appreciated
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aramadan66
9/21/2008 4:35:24 AM
All what i need is to check if the check box is checked, and then save to the Database. i do not want to retain the values when the page post back.
am still not clear how can i acheive this.
i really need help, thsi is critical for me
thanks
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aramadan66
9/21/2008 6:46:21 AM
while (drProfileList.Read())
{
HtmlTableRow tr = new HtmlTableRow();HtmlTableCell tc = new HtmlTableCell();
CheckBox chkbox = new CheckBox();chkbox.ID = drProfileList["RoleID"].ToString() + "_cb";
chkbox.Text = drProfileList["RoleName"].ToString();tc.Controls.Add(chkbox);
tr.Cells.Add(tc);
tblExtProfile.Rows.Add(tr);
}
phExternal.Controls.Add(tblExtProfile);
***** On Postback ***
foreach ( string key in Request.Form ) {
if ( key.Contains( "_cb" ) ){
bool isChecked = Convert.ToBoolean( Request.Form[ key ] )
// save this value to the database
....
}}
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ed_ajax_guy
9/21/2008 7:57:33 PM
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