What is the trick to get the controls inside the FormView. I was getting them with FindControl() but, now i cant get access on them. Example: i have some ImageButton on the FooterTemplate, great i can get those smoothly, when it comes to the controls inside the FormView!!! null every control. Do you think i should name them differently in every template?
This gets me thinking about the table causing this noise!
I'm using the DataBound Event and checking for specific Mode! Any ideas? Thank you.
[UPDATED]
This is working
if (this.kataSistimataFormView.CurrentMode == FormViewMode.Edit)
{
ImageButton update = (ImageButton)this.kataSistimataFormView.FindControl("btnUpdate");
update.Visible = true;
But this for some reason no
CheckBox chkBoxPaidoi = kataSistimataFormView.FindControl("chkBoxPaidoi") as CheckBox;
FindControl is not recursive. What I mean is that it will only find controls that are within the child controls of the control you are searching - it will not search any child controls of the child controls
If you have placed the control you previously were looking for within another control then you will have to either search within that new control or, if you still want to use kataSistimataFormView as the parent control, you may have to use a recursive search.
Google for "findcontrol recursive" there are some good examples that you can probably just cut-and-paste.
As it seems this was caused because of the same naming ID's on various templates, Insert,Edit,Item. Even this is supported by the compiler, has problem when you are going for them programmaticaly later.
Thank you all.
Did you ever get this figured out? If you know the ID you can use this recursive function:
private Control FindControlRecursive(Control root, string id)
{
if (root.ID == id)
{
return root;
}
foreach (Control c in root.Controls)
{
Control t = FindControlRecursive(c, id);
if (t != null)
{
return t;
}
}
return null;
}
Found here:
http://www.codinghorror.com/blog/2005/06/recursive-pagefindcontrol.html
Related
I have tried searching around for this, but what I found was mainly for disabling a single input type.
What I want to do is disable every input type on a single page. Everything. Textboxes, checkboxes the whole lot.
I couldnt figure out how to modify the loops I found, which is why I am asking here, beacause it's likely one of you has a piece of code laying around that can do it.
Thank you in advance.
try below if you like to do it in javascript/jquery
$(document).ready(function(){
$('input').attr('disabled','disabled');
});
OR try below if you want in asp.net
ach control has child controls, so you'd need to use recursion to reach them all:
protected void DisableControls(Control parent, bool State) {
foreach(Control c in parent.Controls) {
if (c is DropDownList) {
((DropDownList)(c)).Enabled = State;
}
DisableControls(c, State);
}
}
Then call it like so:
protected void Event_Name(...) {
DisableControls(Page,false); // use whatever top-most control has all the dropdowns or just the page control
} // divs, tables etc. can be called through adding runat="server" property
I've been using hardcoded hyperlinks for my web app navigation, but the app has grown since and managing it is becoming a real pain. I've decided to replace what I have with the TreeView control, however I want to make several changes to the way it looks.
Is there any property that needs to be set, that would allow user to expand the TreeView node by clicking its text instead of +/- ?
I've already set ShowExpandColapse to 'false'.
I want my final result to end up as something similar to the TreeView on the left of the MSDN site.
Could anyone point me at the right direction please?
Set TreeNode.SelectAction to either Expand, or SelectExpand.
you can use xml data source or direct binding from db to treview
in the TreeView DataBound event we can write d recursive function as below to fetch each node and assign expand action to them.
protected void TreeView1_DataBound(object sender, EventArgs e)
{
foreach (TreeNode node in TreeView1.Nodes)
{
node.SelectAction = TreeNodeSelectAction.Expand;
PrintNodesRecursive(node);
}
}
public void PrintNodesRecursive(TreeNode oParentNode)
{
// Start recursion on all subnodes.
foreach(TreeNode oSubNode in oParentNode.ChildNodes)
{
oSubNode.SelectAction = TreeNodeSelectAction.Expand;
PrintNodesRecursive(oSubNode);
}
}
I think you just have to do this in code: handle the Click event, determine the currently-selected tree node, and toggle its Expanded property (I think that's what it's called here).
You can do this only this way! http://geekswithblogs.net/rajiv/archive/2006/03/16/72575.aspx
With respect,
Alexander
I am trying to add a checkbox in a listview with value as ids of the records from the database so I can allow the user to check the ones they want to delete and when they click the delete button I can get value collection of checkbox with request.form.
My problem is, because checkbox in a listview ASP.NET renders the listview name into the name property of the checkbox, it prevents me to do request.form["checkboxname"].
I don't want to use Listviews delete commands but simply use request.form to get the collection of checked values.
How can I set name of the htmlinput checkbox so .NET doesn't change it in render time?
I have tried:
ListViewDataItem dataItem = (ListViewDataItem)e.Item;
HtmlInputCheckBox _CheckBoxDelete = (HtmlInputCheckBox)e.Item.FindControl("CheckBoxDelete");
_CheckBoxDelete.Visible = true;
_CheckBoxDelete.Value = DataBinder.Eval(dataItem.DataItem, "id").ToString();
_CheckBoxDelete.Name = "deletechecked";
But still it renders like:
<input name="PmList$ctrl0$CheckBoxDelete" type="checkbox" id="PmList_ctrl0_CheckBoxDelete" value="3" />
This is happening because ListView is a Naming Container. You can get around this in a couple of ways, but they all boil down to the choice of:
Rendering the HTML you want.
Pulling out the checked items in a different way.
The former is doable, but you'll likely loose a lot of ASP.NET's built in functionality. I'd advise against it unless you're deeply familiar with the control life cycle.
You've got everything you need for the pulling the values out in a way ASP is expecting:
HtmlInputCheckBox _CheckBoxDelete = (HtmlInputCheckBox)item.FindControl("CheckBoxDelete");
You just need to wait for the control hierarchy to be populated, and then loop over the ListView.Items looking for the checkboxes. Your "Delete" button's event handler is probably a good place to call this from.
Incidentally, why are you using a HtmlInputCheckbox, rather than a CheckBox?
I have sorted it out with:
string idCollectionTodelete = string.Empty;
foreach (string x in Request.Form)
{
if (x.IndexOf("CheckBoxDelete") > -1)
{
idCollectionTodelete += Request.Form[x] + ",";
}
}
new DB().DeleteUserPm(
ActiveUsername(), subdomain, idCollectionTodelete.TrimEnd(','));
It is not an ideal solution but it does work for me.
I do this
List<HtmlInputCheckBox> chkDeleteContacts = new List<HtmlInputCheckBox>();
foreach (RepeaterItem item in rptrFamilyContacts.Items)
{
chkDeleteContacts.Add((HtmlInputCheckBox)item.FindControl("chkDeleteContact"));
}
foreach(HtmlInputCheckBox chkDeleteContact in chkDeleteContacts)
{
//Delete Contact
if(chkDeleteContact.Checked)
blnStatus = BusinessUtility.DeleteConsumerContact(LoginConsumerID, chkDeleteContact.Value);
}
Slightly easier in my opinion
I am trying to disable validators using jquery.
I have already looked
Disable ASP.NET validators with JavaScript
and couple of others doing the same.
It seems ot be working but its breaking.
My code:
$('.c_MyValdiators').each(function() {
var x = $(this).attr('id');
var y = document.getElementById(x);
ValidatorEnable(y[0], false);
});
I get Error:
val is undefined
[Break on this error] val.enabled = (enable != false);\r\n
Alternatively if I use
$('.c_MyValdiators').each(function() {
ValidatorEnable($(this), false); OR ValidatorEnable($(this[0]), false);
});
I get Error:
val.style is undefined
[Break on this error] val.style.visibility = val.isvalid ? "hidden" : "visible";\r\n
Any idea or suggestions?
I beleive that ValidatorEnable takes the ASP.net ID rather that the ClientID produced by ASP.net. You will also need to make the validation conditional in the CodeBehind.
here is an example:
Of particular use is to be able to enable or disable validators. If you have validation that you want active only in certain scenarios, you may need to change the activation on both server and client, or you will find that the user cannot submit the page.
Here is the previous example with a field that should only be validated when a check box is unchecked:
public class Conditional : Page {
public HtmlInputCheckBox chkSameAs;
public RequiredFieldValidator rfvalShipAddress;
public override void Validate() {
bool enableShip = !chkSameAs.Checked;
rfvalShipAddress.Enabled = enableShip;
base.Validate();
}
}
Here is the client-side equivalent:
<input type=checkbox runat=server id=chkSameAs
onclick="OnChangeSameAs();" >Same as Billing<br>
<script language=javascript>
function OnChangeSameAs() {
var enableShip = !event.srcElement.status;
ValidatorEnable(rfvalShipAddress, enableShip);
}
</script>
Reference: http://msdn.microsoft.com/en-us/library/aa479045.aspx
I just stumbled upon your Question [a year later].
I too wanted to disable all validators on a page using JQuery here is how I handled it.
$('span[evaluationfunction]').each(function(){ValidatorEnable(this,false);});
I look for each span on the page that has the evaluatefunction attribute then call ValidatorEnabled for each one of them.
I think the $('this') part of your code is what was causing the hickup.
ValidatorEnable(document.getElementById($(this).attr('id')), true);
I've got another solution, which is to use the 'enabled' property of the span tag for the validator. I had different divs on a form that would show or hide so I needed to disable the validation for the fields inside the hidden div. This solution turns off validation without firing them.
If you have a set of RequiredFieldvalidator controls that all contain a common string that you can use to grab them the jquery is this:
$("[id*='CommonString']").each(function() {
this.enabled = false; // Disable Validation
});
or
$("[id*='CommonString']").each(function() {
this.enabled = true; // Enable Validation
});
Hope this helps.
John
I'm just running into the same problem, thanks to the other answers, as it helped uncover the problem, but they haven't gone into detail why.
I believe it is due to that ValidatorEnable() expects a DOM object (i.e. the validation control object) opposed to an ID.
$(selector).each() sets "this" to the DOM element being currently iterated over i.e. quoted from the jquery documentation:
"More importantly, the callback is fired in the context of the current
DOM element, so the keyword this refers to the element." - http://api.jquery.com/each/
Therefore you do not need to do: document.getElementById($(this).attr('id')
And instead ValidatorEnable(this, true); is fine.
Interestingly, Russ's answer mentioned needing to disable server side validation as well, which does make sense - but I didn't need to do this (which is concerning!).
Scrap my previous comment, it is because I had my control disabled server-side previously.
The ValidatorEnable function takes an object as the 1st parameter and not a string of the id of the object.
Here is the simple way to handle this.
Add a new class to the Validation control.
Then look for that class with jquery and disable the control.
Example :
if (storageOnly == 1)
{
$('#tblAssignment tr.assdetails').addClass('hidden');
$('span[evaluationfunction]').each(function ()
{
if ($(this).hasClass('assdetail'))
{ ValidatorEnable(this, false); }
});
}
else
{
$('#tblAssignment tr.assdetails').removeClass('hidden');
}
* Works like a charm.
** For you imaginative types, assdetail == assignment detail.
Here depending on the if condition, I am either hiding the rows then disabling the validator , or removing hidden class from the rows..
Various ways to this depending on your needs. Some solutions in the following blog posts:
http://imjo.hn/2013/03/28/javascript-disable-hidden-net-validators/
http://codeclimber.net.nz/archive/2008/05/14/How-to-manage-ASP.NET-validation-from-Javascript-with-jQuery.aspx
I am having a number of panels in my page in which I am collecting user information and saving the page details. The page panel has textbox, dropdown list, listbox.
When I need to come to this page. I need to show the Page if these controls have any values. How to do this?
It boils down to enumerating all the controls in the control hierarchy:
IEnumerable<Control> EnumerateControlsRecursive(Control parent)
{
foreach (Control child in parent.Controls)
{
yield return child;
foreach (Control descendant in EnumerateControlsRecursive(child))
yield return descendant;
}
}
You can use it like this:
foreach (Control c in EnumerateControlsRecursive(Page))
{
if(c is TextBox)
{
// do something useful
}
}
You can loop thru the panels controls
foreach (Control c in MyPanel.Controls)
{
if (c is Textbox) {
// do something with textbox
} else if (c is Checkbox) {
/// do something with checkbox
}
}
If you have them nested inside, then you'll need a function that does this recursively.
I know this is an old post, and I really liked christian libardo's solution. However, I do not like the fact that in order to yield an entire set of elements to the outer scope I would have to iterate over those elements yet again only to yield those to myself from an inner scope to the current scope. I prefer:
IEnumerable<Control> getCtls(Control par)
{
List<Control> ret = new List<Control>();
foreach (Control c in par.Controls)
{
ret.Add(c);
ret.AddRange(getCtls(c));
}
return (IEnumerable<Control>)ret;
}
Which allows me to use it like so:
foreach (Button but in getCtls(Page).OfType<Button>())
{
//disable the button
but.Enabled = false;
}
Depeding on which UI library or language you are using, container controls such as panels maintain a list of child controls. To test if a form/page has any data you need to recursively search each panel for data entry controls such as text boxes. Then test if any of the data entry controls contain values other than default value.
A simpler solutions would be to implement an observer class that attaches to the changed events of your data controls. If the observer is triggered then your page has changes. You will need to take into consideration actions such as changing and then reverting data.
Very similar solution to Cristian's here, which uses recursion and generics to find any control in the page (you can specify the control at which to start searching).
http://intrepidnoodle.com/articles/24.aspx