I have a DropDownList with the visible property = false. When the user check's the checkbox I want the DropDownList to become visible. If the user unchecked the checkbox I want the DropDownList unvisible again.If there anyne who can help me. I'm using vb. I try this code in the checkedchanged event but didn't work.
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Check box's event CheckedChanged is not firing when uncheck the check box :This checkbox will help in checking the checkbox list and whne uncheck it will uncheck the checkbox list.I am using AJAX for this page post backs.Here is the html code for check box:
<asp:CheckBox
runat="server"
ID="ckbAll"
[code]...
I am creating an array of checkboxes :
1. chkresponse = new System.Web.UI.WebControls.CheckBox[cnumber + 1];
for (int
i = 0; i < cnumber + 1; i++){
chkresponse[i] = new System.Web.UI.WebControls.CheckBox();
chkresponse[i].CheckedChanged +=
new EventHandler(chkresponse_CheckedChanged);
chkresponse[i].AutoPostBack =true;
}
2. thereafter adding them to a panel
Panel1.Controls.Add(chkresponse[n]);
3. then added the checkedchanged event:
public
void chkresponse_CheckedChanged(Object sender, System.EventArgs e)
{Label1.Text = "response";}
but the event is never fired. the panel is insdie an updatepanel.
I have a CheckBox on an ASP.NET Content Form like so:
<asp:CheckBox runat="server" ID="chkTest" AutoPostBack="true" OnCheckedChanged="chkTest_CheckedChanged" />
In my code behind I have the following method:
protected void chkTest_CheckedChanged(object sender, EventArgs e)
{
}
When I load the page in the browser and click the CheckBox it becomes checked, the page posts back, and I can see chkTest_CheckedChanged being called.When I then click the CheckBox again it becomes unchecked, the page posts back, however chkTest_CheckedChanged is not called.The process is repeatable, so once the CheckBox is unchecked, checking it will fire the event.I have View State disabled in the Web.Config, enabling View State causes this issue to disappear. What can I do to have reliable event firing while the View State remains disabled?Update:If I set Checked="true" on the server tag the situation becomes reversed with the event firing when un-checking the CheckBox, but not the other way around.Update 2:I've overridden OnLoadComplete in my page and from within there I can confirm that Request.Form["__EVENTTARGET"] is set correctly to the ID of my CheckBox.
I am using a list view inside that in item template i am using a label and a checkbox.I want that whenever user clicks on the check box the value should be updated in a table.i am using a datakeys in listview.on the basis of datakey value should be updated in the table. Query is:string updateQuery = "UPDATE [TABLE] SET [COLUMN] = " + Convert.ToInt32(chk.Checked) + " WHERE PK_ID =" + dataKey + " ";` also i want some help in displaying the result as it is inside the table.means if the value for column in table for a particular pkid is 1 then the checkbox shoul be checked.Here is the code snippet:
<asp:ListView ID="lvFocusArea" runat="server" DataKeyNames="PK_ID" OnItemDataBound="lvFocusArea_ItemDataBound">
<LayoutTemplate>
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I have a page on which everything is loaded dynamically.
There is a Gridview (AutoGenerateColumns=true) and in the RowDataBound I check every column for a boolean datatype. If found I add a checkbox (autopostback=true) to the cell and register the CheckedChanged event.
The problem is, that I only get the CheckedChanged event, if I reload the grid in Page_Load:
protected void Page_Load(object sender, EventArgs e) {
LoadGrid();
}
But this is very expensive and causes that the db request will be executed twice. If I changed the code to what I want:
protected void Page_Load(object sender, EventArgs e) {
if (!this.IsPostBack)
loadGrid();
}
I get no CheckedChanged event.
Is there a possibility to get:
- Adding a Checkbox in RowDataBound
- Only "LoadGrid()" if it is no PostBack
- Getting the CheckedChanged event of the relevant row
I have a checkbox, textbox and requiredfieldvalidator inside the updatepanel. Once user checks selects
checkbox I am enabling requiredfieldvalidator.
I have one more textbox, requiredfieldvalidator, validationgroup and Linkbutton outside updatepanel.
Strange thing is Checkbox checked event not firing in some cases,
1. Check the checkbox (which enables requiredfieldvalidator)
2. Click the Linkbutton (fires two validators)
3. Uncheck the checkbox (which should disable requiredfieldvalidator)
4. Click the linkbutton again (again it fires two validator, which should fire only one validator)
Note: The problem only arising when I add javascript block to linkbutton in page load event.
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I am working on windows form using C# language and I need to trigger the Checkbox's CheckedChanged event.
What code do I need to write to call or trigger this event.
I am facing one strange problem,I have a gridview in which the last two columns have checkboxes and on those checkboxes click event I am doing some database operations.I also have one checkbox that is outside the gridview which actually shows or hides some of the gidview columns.This was all working well but now I have shifted that grid to a user control because I have to use it in two pages.The problem now is,When the page first loads and I click the check box or any control in the page that is outside the grid then it works perfectly.But once I click any of the check box within grid view column then its behavior chages, now even if I click the checkbox that is outside the grid then also the checkbox_CheckedChanged event of the checkbox that is whithin gridview is fired.That checkbox event then behaves something like a page_load event that is called for every page load and for every event with in the page after it is called once.
View 3 RepliesI have a simple form with 2 radio button grouped. I´m trying to hide/show a DropDown Listbox with the event CheckedChanged, but this event never fires...
<asp:RadioButton ID="AgruparPorCategoriaRadio" runat="server" GroupName="CategoriaFechaRadio" Text="CategorÃa"/>
<br />
<asp:RadioButton ID="AgruparPorFechaRadio" runat="server" GroupName="CategoriaFechaRadio" Text="Fecha" />
AND THE CODE BEHIND:
Protected Sub AgruparPorCategoriaRadio_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles AgruparPorCategoriaRadio.CheckedChanged
AnticipacionList.SelectedIndex = 0
AnticipacionList.Visible = False
TemasList.Visible = True
ActividadesGrid.DataBind()
End Sub
I have a web form with two RadioButtons, both use the same GroupName, both have AutoPostback enabled and both have an event handler for CheckChanged. I use tem to show/hide a Panel further down the form which is contained in an UpdatePanel with Conditional Update set and with both CheckedChanged events in the Triggers collection:
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Now, the problem arises when I set the Checked property of either RadioButton in Page_Load, which results in the even not firing for the button which was marked as Checked (the event for the radio button whose property was not assigned does get fired). In fact, upon inspecting the source there was no 'onclick' attribute declared for the input element that was marked as checked in the Page_Load, whereas the other RadioButton did have the 'onclick' attribute properly set.
The layout of the form doesn't allow me to place the radio buttons within the UpdatePanel, so that is out of the question. Is the behavior explained above normal? am I missing anything? Both events fire once the assignment to the Checked property is removed from Page_Load.
I have a GridView, which features a a checkbox on each row (in a template field), where it calls a method upon checked changed (well, when they click submit - no auto post back)
My problem is, the checked change refuses to fire more than once - if I just change the check state of one checkbox in the grid, it works fine. More than one and it only fires the event once.
EDIT: Bit of code:
<asp:CheckBox ID="chkIncludedLocal" runat="server" Checked='<%# Bind("Included") %>'
Enabled="true" OnCheckedChanged="chkIncludedLocal_CheckedChanged" />
And in the event, I put a breakpoint right at the top to see how many times it fires
I have a procedure that is generating some radio buttons and assigning a CheckedChanged postback event based on the level being passed through (up to 4 levels). When the first level is checked (radio button selected) the postback event rb_CheckChanged00() is called and a check is done to see if this item has any children, if it does, it will create more radio buttons and assign rb_CheckChanged01 to the CheckChanged event for these - This part is working fine.
The issue I have is when I select the second Radio Button that has been created (the child), it doesn't seem to go to the post back event at all. The page is posting back when I click on it but everything resets because it won't go into rb_CheckChanged01.
I know this info is quite vague but I am hoping someone has an idea on how the post back event works and if I am somehow using it incorrectly.
i have a gridview with columns as datetime name status
i need to update the column record , so i used:
<asp:CommandField ShowEditButton="true" ButtonType="Link" EditText="Edit" ShowHeader="true" HeaderText="Edit" HeaderStyle-Font-Bold="true" Visible="true"> <HeaderStyle Font-Bold="True" />
</asp:CommandField>
and in rowediting event:
protected void GrdDynamicControls_RowEditing(object sender, GridViewEditEventArgs e)
{
GrdDynamicControls.EditIndex = e.NewEditIndex;
}
if i hit edit command by default it is showing me oly textbox, but i need datepicker and checkbox to be displayed in edit mode. how to bring that.
my page are 1 checkbox and 1 hidden label and 1 hidden panel. With the help of forum member raghav_khunger I've managed to write the code which shows panel and label when checkBox is checked. I've also added the code which is checking on every page post back the status of checkbox and hide/show panel and label appropriately. This is working fine.However when I add jQuery Safari checkbox plugin [URL] problems appear.
Looks like the code which is handling click event is doing reverse thing: when panel and label should be hidden are shown. I can change this but then there would be problems because of the second part of the code which is checking checkbox on page load. So when I check the checkbox nothing happens. I must uncheck it and label and panel appears. But if panel is uncheck the label and panel would be hidden because on next page load (when user clicks button next).As I said before the same code is working fine and it's test in all browsers (IE,FF,O,S,C). Maybe there is problem with checkbox plugin since it's in beta version.
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I have a div in which i have few text boxes and checkboxes, i wrote checkboxchanged event but it is not firing when i check or uncheck the checkbox i set the autopostback property of the checkbox = true but still no result. does any one have idea how to control this scenario.
View 6 RepliesI have one RadionButton and a Button.
When I clik on RadionButton it fires it CheckedChanged Function perfectly.
But, when I click on the Button, it ALSO fires the same RadionButton ChechedChanged Function! I don't know why!!!
I want to avoid that! I don't want the button firing that RadioButton function.
I have a webform with 2 listboxes and 2 checkboxes... When I check checkbox1 I want listbox1 to be disabled and checkbox2 to be disabled. Similarly, when I check checkbox2 I want listbox2 to be disabled and checkbox1 to be disabled. The code does not show any errors; however, when I run the Page everything appears as it is supposed to but when I check the boxes, nothing happens. What am I missing that will link the code on the .aspx.vb page to the objects on the .aspx page and make them work together?
Here is my code for Page1.aspx.vb:
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i am desigining an application where i m creating checkBox (not checkBoxList) dynamically. There is one master check box that define group if i click that it should click all subCheck box under it.I am using ajax in my application.i am able to generate check box at runtime but not able to find its event here is the code for creating check
box and its event.
//This define master check box
CheckBox MstChk = new CheckBox();
MstChk.ID = Str_Header;
MstChk.AutoPostBack = true;
MstChk.CheckedChanged += new System.EventHandler(MstChk_CheckedChanged);
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now problem is here when i click on masterCheckBox i am not able to get Evnet MstChk_CheckedChanged but if call DesignUserPrivilegePnl() in page_init instant of Page_Load i am able to get the event but then i get erro object instatnt not set to an instat of object at foreach (Control Child in Parent.Controls)i am googled but still not get the solution hope you people will guide to overcome my error
I just developing my web design skills.
I have a Datagrid with 2 textbox template columnsand two checkbox template columns. I have two other Textbox controls and two CheckBox controls. I have an Add button.
I want to be able to use the add button to update Datagrid Record inserting the Textbox control texts and the Checkbox Control status.
I have a asp.net page where we need to dynamically generate a table, table row, and a checkbox controls in this row. A button serves Add Row and create checkbox function, which works fine. We have another button which serves on deleting the selected row if a user checks the checkbox. The deleting event is dynamically added to the checkbox. But the delete button is not working at all. I think that the page does not maintain the states of dynamically generated controls, even I set Page enable view state to True. Here is the code:
I am generating a table dynamically with one row having four cells.
First cell is having checkbox and below is the code how i declare it and assign it a new id at runtime.
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I have a table with 100 cells in it (10x10)
In each cell there is a checkbox. On page load, each checkbox is checked depending on records 0-99 from a database. This works fine.
However, I want to be able to update those 100 records in the database by checking or unchecking the checkboxes.
The update process works ok as I have debugged it, but the problem seems to be that if I check a checkbox, that value (true or false) doesn't get passed to the event handler.
This is the button click event handler that I'm running right now to see if the value is being recognised:
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If I tick checkbox zero and click the button, it still comes up as false. What I want to happen is that the DB is updated and when the page loads, the checkboxes are repopulated with the new values from the database.
I'm trying to use your example of hierarchical gridview: [URL] .....
I'm trying to catch a click event on a checkbox which is in grid child. Just catches the check event, but not catch uncheck event.
I have a gridview with a template column that causes a postback on check changed in order to change display. It works fine:
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And the code behind:
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Works great, right? Well I wrote a small javascript file to make the checkboxes mutually exclusive, but now, while the post back refreshes and the javascript works, it does not show the popup extender anymore - it doesn't even enter the codebehind function.
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Here is my situation: I have a overview of subscriptions that look simple:
Active (bool), ID (int), StartDate (datetime) and MaxUsers (int).
I've put this in a Gridview and it renders nicely.
Now everything is simply in ItemTemplates and are formatted.
Now a new feature: In the Gridview active should be a checkbox and when clicked on it, it should (de)activate the subscription. Or simply said, Active status is updated. Now me being a simpleton thinks:
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and the cs:
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But! the event doesnt get fired. Now I've searched with google and also through this forum and every time I get the answer: autopostback on true or use commandname. Now for this little feature I think the commandname use in combi with rowbound is overkill for such a little thing.
Now I hope I'm just missing something because this would be really nasty and stupid to make it so complicated. I like the autopostback and oncheckchanged combination because it logical, but why doesnt it work?