I know this topic has been posted before but I'm stuck on it still.I've placed creating of dynamic control on Page_Load but the event isn't firing.On my asp page, i have <asp:PlaceHolder ID="test" runat="server/>On my code behind, I have private display method.
private void DisplayButton() {
LinkButton btn = new LinkButton();
btn.ID="unit_1";
[code]...
Is it possible to use JavaScript passed by Ajax on the client-side? I am getting an "object expected" error from an onClick event from a HTML control that is passed with the JS. The controls and JS work when the page is rendered on the server.
View 4 RepliesWhat I'm trying to accomplish is to set my dynamically created button with a onClick command so when click it will run a method in the code behind.
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- I've created a Survey with multiple sections in it
- The answer types are variable and, thus, the controls are created dynamically
- I have a Repeater where each RepeaterItem corresponds to a Category. (I have 5 categories in my current test, so I have 5 DataItems in the Repeater) Each RepeaterItem contains another Repeater which will hold the Question / Answer values
- After I data bind the Category Repeater, I loop through each RepeaterItem, find the Repeater contained in each RepeaterItem, and DataBind() this second Repeater to a list of Questions
- After DataBinding the Repeater containing the Questions, I sent that Repeater object to another routine, which is where the Answer controls are dynamically created and added to a Panel inside each of this Repeater's RepeaterItems.
I am able to navigate back-and-forth among Categories, save / delete answers, and fill in answers for Surveys that were left incomplete when a user logs back in.
One of the the potential control types for an answer is a ComboBoxList.
Each Question has an option for answers that require a ComboBoxList called "MaxAnswers." When this value > 0, I inject a little javascript that prevents the user from selecting more boxes than the "MaxAnswers" value. This is done during the last step described above like so:
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This appears to always be added regardless of how many questions I answer or don't answer or how many times or directions I navigate around inside the survey. (I can push "Back" and "Previous" buttons as well as jump directly to any individual category by clicking a LinkButton)
Another option for Questions requiring a CheckBoxList is to specify if the selection of a specific ListItem within the CheckBoxList should display a TextBox. (e.g. a selection of "Other" will display a TextBox for the user to write-in an answer) I want to prevent a post-back just to show/hide a TextBox, so I inject an onclick event attached to the specific ListItem to accomplish this. The following code appears as the very next routine following the code pasted above:
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This also works the first time the page is loaded but not after any PostBacks...
The lblMessage.Text lines are written to the page after ever PostBack, the MaxAnswers routine correctly adds the onclick event to the necessary CheckBoxList controls, but the "fncShowFTB" event is not added. Viewing the HTML with Firebug does show the onclick the first time the page is loaded, but it's missing after every subsequent postback.
Can anyone see what I am doing wrong that causes me to lose this event?
The Firebug HTML on initial page load looks like:
<input type="checkbox" onclick="fncShowFTB(this,'FTB50');" name="dnn$ctr556$View$rptCategoryPanels$ctl02$rptQuestions$ctl11$ctl00$6" id="dnn_ctr556_View_rptCategoryPanels_ctl02_rptQuestions_ctl11_ctl00_6">
After PostBacks, it looks exactly the same except that the onlick event is missing.
I have used jQuery to invoke an AJAX webmethod in c#. This webmethod runs a query and stores the resulting information in a session variable. I have a gridview that has an objectdatasource that uses the session variable with the selectmethod to then populate the gridview with data from a query. I need the final piece to get the gridview to databind() again with the new value.
So click map, update gridview. However, maybe I'm going about this all wrong. In essence, take javascript variable, push to ASP.NET in C# and refresh gridview on page with new data from query.
I have created a user control which has a form and 2 buttons; Save and Submit. Both buttons are created at design time. Users can enter details in the form (e.g. title and description of an item) and click Save which does some server-side processing to create an 'Item' then clears the form.
The buttons:
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And a placeholder to add dynamically created controls:
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I am saving the Items in ViewState and dynamically creating a LinkButton control for each Item which allows the user to edit the item:
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Now, when I test this in Visual Studio 2010, it works fine;
1. Enter Item title and description in form
2. Click Save
3. Save button triggers postback and onClick event code is run
4. ViewState list is displayed below the form
When I create a local IIS web site for testing, the postback on the Save button only works the first time I click it. Postback is false on the second click and the page reloads without running the onClick event code.
How do I setup a default setting so that if I do not set an OnClick (i.e the asp.net OnClick attribute) explicitly for an asp:LinkButton tag, it will not render an onclick(html attribute for javascript) attribute client side? By default, asp.net adds an onclick='doPostBack....' for the LinkButton.
Case for use:
There is a LinkButton tag on the page. For this page, if the user has one friend, I only want to run client side code if the button is clicked and would not for any reason want to make a post back. If the user has more than one friend I would want a click to trigger a postback.
Using any asp.net Ajaxtoolkit
Dynamically switching the control type (i.e. if friends == 1 use a asp:Hyperlink)
-I want to avoid this because it is not scalable. There might be many cases where I want an asp:Link tag to do a postback or to not do a postback depending on the user context or user attributes Using OnClientClick (I am using jQuery would like to avoid this)
well i have already created the rows and cells dynamically using asp.net table control ...but how to add an onclick event on that ...so that i could retrieve the corresponding cell when a particular row is clicked ...if it was a html control ,i could have used javascript but in this particular case m unable to find any solution..
View 2 RepliesI understand I need to load my dynmaic control on every postback and preferrably in Page_Init(). But my dyanmic controls are loaded from a dropdownlist selectedindexchanged event handler. Now after any postback, my dynamic controls are gone. How would I force it to load on every postback ?
View 2 RepliesI have a asp.net page with a button, the event the button needs to perform on it's click event needs to vary, dependant on what options are selected further up the page. The button itself is included in the master page, and it's actions are affected by selections made in the child page.
To do this, I have a method in the master page, that is called by the child page, when a users presses a button, that passes the Eventhandler to be used by that button, that is then assigned to masterpage eventhandler for that button:
public void assignEvent( EventHandler saveEvent)
{
this.SaveButtonEvent+= saveEvent
}
Then, when the save button on the master page, it calls that eventhandler
protected void save_Click(object sender, EventArgs e)
{
if (this.SaveButtonEvent != null)
{
this.SaveButtonEvent(this, e);
}
}
The event handler is assigned ok in the first section of code, however because pressing the save button causes a postback, the SaveButtonEvent event handler is set back to being null, and so nothing happens.
How can I preserve the contents of SaveButtonEvent Event Handler during postback, or is there a better way to be doing this?
EDIT:
I can get this to work by saving the EventHandler to the session, but this doesn't seem like a great idea.
I need to add the OnClick event to asp:DropDownList control, due to the existing events don't satisfy my current needs.
View 1 RepliesI am trying to save the onclick statistics after the search results are clicked. this is how i have done in ASP.net using repeater control.
string domainName = String.Format("{0}/{1}", ConfigSettings.ReadConfigValue("DomainName"), loc.DomainName);
string statScript =
string.Format("UpdateDealStatistics('MerchantProfile', 'clicked'," + loc.LocationID + "," + merchantID + ",'" + x + "'," + UserID + ", 0," + "'Search Display','" + domainName + "')");
((HtmlAnchor)e.Item.FindControl("MerchantName")).Attributes.Add("onclick", statScript);
((Literal)e.Item.FindControl("litLocName")).Text = String.Format("{0}", loc.LocationName);
((Literal)e.Item.FindControl("litLocAdd1")).Text = loc.Address;
((Literal)e.Item.FindControl("litLocCity")).Text = loc.City;
((Literal)e.Item.FindControl("litLocState")).Text = loc.State;
aspx page:
<asp:Repeater ID="rptSearch" runat="server" OnItemDataBound="rptSearch_ItemDataBound"
OnItemCommand="rptSearch_ItemCommand">
<HeaderTemplate>
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I have a page where I add a dynamic user control in the Page_Load event based on criteria.
The control is a simple form with a save button. The problem is the _Click event never fires for the button. It will postback the main page the control is within, but not the code behind for the control...so I never get the button click even, and therefor can't execute the save code.
Tried it in the init, tried adding the control to a placeholder, tried a lot of various things but nothing seems to work.
Code:
If cb_business_profile.Items.Count = 0 Then
Dim u_pnl_content As UpdatePanel = Page.FindControl("u_pnl_content")
u_pnl_content.ContentTemplateContainer.Controls.Clear()
Dim business_profile_detail As Control = LoadControl("~/controls/business_profile_detail.ascx")
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I have a simple form with a button. The button is server control.
in the OnClientclick event of the button control, I am actually doing some validations. If the validation fails, the onclick event should not be executed. How can I control this?
In the code below, PerformChecks() function gets fired first and alert message pops up fine. But immediately onclick event (which is handled on the server) gets triggered. if the check in PerformChecks fail, how can I suppress onclick event?
Code:
<asp:Button ID="ButtonRun" runat="server" Text="Go"
onclick="ButtonRun_Click" OnClientClick="PerformChecks();" Width="57px" />
function PerformChecks() {
var checkboxCollection = document.getElementById('<%=CheckBoxListInstruments.ClientID %>').getElementsByTagName('input');
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I am creating a button dynamically in my code and attaching a click event to it. However I have to prevent people to click it while there is a process going on. So when it is clicked once, it should be disabled and when the process ends it should be enabled. How can I do that?
View 4 Replies I am using the following code to load user control on to ASPX Page, which under a Master Page:
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The user control name is passed as a parameter on the URL.
Inside the user, there is a LinkButton. The link button has a simple server side code for OnClick event.
Everything is working fine on the production machine, but, on the Development machine, I can see incorrect behaviour. I have started making some development changes on the Development Machine since several months back, and it will be very difficult to find out what caused the problem.
When I click the LinkButton inside the user control, the user control is removed from the parent page, and the OnClick event of the LinkButton is not firing.
I did debug, and found out that after I click on the LinkButton inside the user control, then the Page Load events for the master page and the ASPX page are working fine, and the IsPostBack is set to true, but the OnClick event of the LinkButton is not firing.
On postback, how can I check which control cause postback in Page_Init event.
protected void Page_Init(object sender, EventArgs e)
{
//need to check here which control cause postback?
}
I have a modalpopup extender attached to a button. That is to say the button is the targetcontrol id of the modalpopupsxtender. I would still like the onclick event of that button to work because only the onclient click event is working. How can i go about this.
View 1 Repliesformatting for an on click event in a hyperlink control:
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I get an error with the using the <% %> within the onclick.
Can i know that how can i get a dynamic dropdownlist controls's value after postback?
View 5 RepliesI have one web control in a page.
Lets say i have a web control that has one <asp:textbox id="action" text="getArticle"> and one <asp:button ...>
If i press the button, a postback will occur but will not load this web control again but it is supposed to load another web control.
How can i obtain the value of the textbox. The issue is that the web control is not loaded so findControl("action") will return null.
What is the correct approach to handle this? Should i use url parameters? Is there another way.
I want to create a dynamic, role-based tab control that doesn't trigger a postback when the user switches between tabs.
View 3 Replieswhat're the differences between onclick event and oncommand event?
View 2 RepliesI have a link button embedded in a repeater but I can't figure out how to get the exact postback reference of the control so I can access it in JavaScript. Bear in mind this code is a little pseudocodish/partial anyway and I am fixing someone else's code.
I just can't seem to get the right postback JavaScript - the form posts but doesn't fire the item command event or pass the
Protected Sub repResults_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles repResults.ItemDataBound
Dim hypInsertBCard As LinkButton = e.Item.FindControl("hypInsertBCard")
Dim myPostBackOptions As PostBackOptions = New PostBackOptions(hypInsertBCard)
myPostBackOptions.AutoPostBack = True
myPostBackOptions.RequiresJavaScriptProtocol = True
myPostBackOptions.PerformValidation = False
Dim strRef As String = ClientScript.GetPostBackEventReference(myPostBackOptions)
hypInsertBCard.Attributes.Add("onkeypress", strRef)
End Sub
I have a custom control which contains (amongst other things) an imageButton.
I'm adding a handler to the "click" event of the imageButton however when the button is clicked the handler routine is not called. where I am going wrong with this? should I be handling the click event in some other way?
here is my code:
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