[PsychoCoder]

Has anyone ran into this before, and if so how did you resolve it. Here's the scenario, I have this code

DateTime start = Convert.ToDateTime(StartDate.Text);
DateTime end = Convert.ToDateTime(EndDate.Text);
string title = NewTitle.Text;
int active = Convert.ToInt32(rblIsActive.SelectedValue);

And I get a compilation error saying those controls don't exist , but here they are in the ASPX page

	<td valign="top">
		<table style="width:100%;" cellpadding="3" cellspacing="0">
			<tr>
	<td style="width: 70px;">
		New Title:</td>
	<td>
		<asp:TextBox ID="NewTitle" runat="server" CssClass="reg_form" Text='<%#Eval("Title") %>' />
	</td>
</tr>
<tr>
	<td>
		Start Date:</td>
	<td>
		<asp:TextBox ID="StartDate" runat="server" CssClass="reg_form" Text='<%#Eval("StartDate") %>' />
		<a href="java script:void(0);return false;" onclick="window.open('../../Popups/PopCalendar.aspx?type=StartDate','cal','width=250,height=225, status=0,menubar=0,location=0,toolbar=0,directories=0;')">
			<img src="../../images/main_images/SmallCalendar.gif" border="0" width="16" height="16"></a>
	</td>
</tr>
<tr>
	<td>
		End Date:</td>
	<td>
		<asp:TextBox ID="EndDate" runat="server" CssClass="reg_form" Text='<%#Eval("EndDate") %>' />
		<a href="java script:void(0);return false;" onclick="window.open('../../Popups/PopCalendar.aspx?type=EndDate','cal','width=250,height=225, status=0,menubar=0,location=0,toolbar=0,directories=0;')">
			<img src="../../images/main_images/SmallCalendar.gif" border="0" width="16" height="16"></a>
	</td>
</tr>
<tr>
	<td valign="top">
		Active:</td>
	<td>
		<asp:RadioButtonList ID="rblIsActive" runat="server">
			<asp:ListItem Value="1" Selected="true" Text="Yes" />
			<asp:ListItem Value="0" Selected="false" Text="No" />
		</asp:RadioButtonList>
	</td>
</tr>

Has anyone seen this/resolved an issue like this before in ASP.NET?

[Jayman]

I don't see anything wrong with what you posted.

Is there anything that you didn't include that may be impacting the ability of the page to see the controls?

I typically run into this when using Ajax or having controls within another control. We use a lot of wizards which load user controls that contain all the functionality of our portal. Using the FindControl method is a necessity in these situations, as I am sure you already know. But I had to ask.

Anything like that going on with what you are doing?

[PsychoCoder]

Not really, I mean these controls are inside an <asp:View control, then again all other controls are as well, and none of them have I ran into this issue before. I'm almost ready to pull my damn hair out, not that I have a lot to pull anyways!

Also, no ajax at all, just simple ,Net server controls

[PsychoCoder]

Anyone have any ideas? I even went as far as to delete the page and recreate it, same thing

[PsychoCoder]

Issue's resolved. Sometimes I wonder about myself, those controls are inside a DataList so I had to use

TextBox startDate = (TextBox)EditTag_DL.FindControl("StartDate");
TextBox endDate = (TextBox)EditTag_DL.FindControl("EndDate");
TextBox newTitle = (TextBox)EditTag_DL.FindControl("NewTitle");
CheckBox keepActive = (CheckBox)EditTag_DL.FindControl("KeepActive");

Now I just need to get rid ofthe following error that happens when I click the "Update" button

Quote

Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

[jacobjordan]

PsychoCoder, asking a q-q-question??? I didn't think it was p-p-possib-b-ble!! Help! Water! I t-t-think i'm having a st-t-troke!!

[aie.k]

PsychoCoder, on 11 Oct, 2008 - 09:42 AM, said:

Issue's resolved. Sometimes I wonder about myself, those controls are inside a DataList so I had to use

TextBox startDate = (TextBox)EditTag_DL.FindControl("StartDate");
TextBox endDate = (TextBox)EditTag_DL.FindControl("EndDate");
TextBox newTitle = (TextBox)EditTag_DL.FindControl("NewTitle");
CheckBox keepActive = (CheckBox)EditTag_DL.FindControl("KeepActive");

Now I just need to get rid ofthe following error that happens when I click the "Update" button

Quote

Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

Hello, stumbled upon this while trying to figure the same happening out, ie. Invalid .... Since I just registered in this forum, I cannot send you a PM and thus choosing to post here. The coding part of this feels a bit tricky and if you could give me an example on how to Register... I would much appreciate it and have a couple of hours to do some other coding . Thank you in advance.

Edit: If that is the part to correct, found a blog that says otherwise http://dotnetscribbl...-and-event.html and it feels like I really don't know where to start. Being new here I don't want to give the impression that I want my homework done but any information pointing me in the right direction would make a big difference to my day.

This post has been edited by aie.k: 24 November 2008 - 02:34 AM

[nakul_sehgal]

Hey, I ran into the same problem with textbox controls, earlier they were running Ok, but when I build the application, it shows this error, that the respective textbox does now exist in the current context. I used your code and idea to overcome this problem, but still exists.

Any help would be appreciated.

Thank you

[shekhar_pawar]

Hey Guys,
Its quite simple.
This error happens due to design bugs with Visual Studio.
Just cut and paste the controls again. It will resolve the issue.


I Did the same …

This post has been edited by shekhar_pawar: 18 November 2009 - 11:52 PM

[subiparihar]

I am also facing the same error and tried to cut and past controls but unable to compile my code. It giving control are not exist but here they are in the ASPX page. any suggestion?