ASP.NET AJAX UI

Re: Probem with hidden validators inside UpdatePanel

chetan.sarode — Mon, 16 Jul 2007 03:48:54 GMT

http://blogs.msdn.com/mattgi/archive/2007/01/23/asp-net-ajax-validators.aspx

Re: Probem with hidden validators inside UpdatePanel

poortl9109 — Sun, 15 Jul 2007 04:59:21 GMT

It seems that this is not causing problems with the required validator but I need the range validator to validate the type.

I also have a regular expressions validator that fails similarly to the range validator.

Re: Probem with hidden validators inside UpdatePanel

poortl9109 — Sun, 15 Jul 2007 04:56:06 GMT

Thanks for the reply. That didn't seem to work and I'm wondering if the problem is somewhere else. I have a very simple sample of one page and one user control that I am working on to try and solve this problem. The main page uses the LoadControl function to load a usercontrol which contains the validation. The main page has a ScriptManager object and the usercontrol has a UpdatePanel object but the validation controls are not inside of the update panel. What happens is that the client side validation works but when the page posts back with valid data it returns invalid. It also is invalid on the server side after the postback. I also tried and made this example even simpler by not using the placeholder and loadcontrol function but just placing the usercontrol on the page and that has the same errors. I've spent several hours searching on the internet for a solution and I turn up with nothing. This seems like a common situation so it makes me think I must be doing something wrong but I'm really baffled at this point.

Here is the code:

default2.aspx:

<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

    protected void Page_Load(object sender, EventArgs e)
    {
        UserControl ctl = (UserControl)LoadControl("WebUserControl2.ascx");
        ctl.ID = "someid";
        PlaceHolder1.Controls.Add(ctl);
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server" />
        <div>
            <asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
            </div>
    </form>
</body>
</html>

WebUserControl2.ascx:

<%@ Control Language="C#" ClassName="WebUserControl2" %>
<%@ Import Namespace="System.Web.Configuration" %>
<script runat="server">

    protected void Page_Load(object sender, EventArgs e)
    {
        Configuration configuration = WebConfigurationManager.OpenWebConfiguration("/AJAXEnabledWebSite1");
        // Get the section.
        PagesSection pagesSection = (PagesSection)configuration.GetSection("system.web/pages");
        pagesSection.TagMapping.Add(new System.Web.Configuration.TagMapInfo(
            "System.Web.UI.WebControls.RangeValidator", "Sample.Web.UI.Compatibility.RangeValidator, Validators, Version=1.0.0.0"));

        Sample.Web.UI.Compatibility.RangeValidator range = new Sample.Web.UI.Compatibility.RangeValidator();
        range.Type = ValidationDataType.Double;
        range.ControlToValidate = TextBox1.ID;
        range.ErrorMessage = "RangeValidator";

        Controls.Add(range);
    }
    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        Label1.Text = DropDownList1.SelectedItem.Text;
    }
</script>
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
    <asp:ListItem>first</asp:ListItem>
    <asp:ListItem>second</asp:ListItem>
    <asp:ListItem>3</asp:ListItem>
    <asp:ListItem>4</asp:ListItem>
    <asp:ListItem>5</asp:ListItem>
</asp:DropDownList><asp:UpdatePanel ID="UpdatePanel1" runat="server">
    <ContentTemplate>
        <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
    </ContentTemplate>
    <Triggers>
        <asp:AsyncPostBackTrigger ControlID="DropDownList1" EventName="SelectedIndexChanged" />
    </Triggers>
</asp:UpdatePanel>
<asp:Button ID="Button1" runat="server" Text="Button" />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

Re: Probem with hidden validators inside UpdatePanel

mbarlowm — Sun, 15 Jul 2007 03:47:45 GMT

Yeah, my code used to be:

Dim reqValidator As New RequiredFieldValidator

I swtiched to:

Dim reqValidator As New Sample.Web.UI.Compatibility.RequiredFieldValidator

Then, because I had several ont he page, I just imported the namespace on that page and it used the new namespace for all like this:

Imports Sample.Web.UI.Compatibility
...
Dim reqValidator As New RequiredFieldValidator

It could not have been easier, really.

Re: Probem with hidden validators inside UpdatePanel

poortl9109 — Sun, 15 Jul 2007 03:25:33 GMT

mbarlowm:
Maybe tagMappings had no effect because I was not adding them as tags? I am adding them in code. In code then, I created the right objects from the Compatibility namespace. Works great now, thought I wish it could be in Web.Config instead of in code. I did not have to disable clientside validation.

Would you mind posting your code please? I am having the same problem.

Re: Probem with hidden validators inside UpdatePanel

mbarlowm — Thu, 31 May 2007 20:05:02 GMT

Maybe tagMappings had no effect because I was not adding them as tags? I am adding them in code. In code then, I created the right objects from the Compatibility namespace. Works great now, thought I wish it could be in Web.Config instead of in code. I did not have to disable clientside validation.

Re: Probem with hidden validators inside UpdatePanel

chetan.sarode — Thu, 31 May 2007 03:41:45 GMT

Have you checked those link what I have provided...

Got any solution form that ?

Re: Probem with hidden validators inside UpdatePanel

Neoman — Wed, 30 May 2007 19:56:40 GMT

From

http://ajax.asp.net/docs/overview/UpdatePanelOverview.aspx

"To make the validators compatible with an UpdatePanel control, set the EnableClientScript property of the validators to false. This disables the client script that would ordinarily be used to perform validation in the browser. As a result, during an asynchronous postback, the validators perform validation on the server. However, because only the content of the UpdatePanel is refreshed, the validators can provide the kind of immediate feedback that is ordinarily provided by client script. "

Re: Probem with hidden validators inside UpdatePanel

mbarlowm — Wed, 30 May 2007 19:14:55 GMT

I have run up agaist this problem, but the tagMappings had no effect. What's different about my project is that I'm using a deployment project to compile my User Controls (which contain the Update Panel). I have the tag mappings in the Web.config of the compiled project, and of the project that references it. There was no effect. After the first AJAX postback, the validators in the UpdatePanel will not appear when appropriate violations are made. I have no ideas about what to try next. Does anyone have any ideas?

Re: Probem with hidden validators inside UpdatePanel

chetan.sarode — Sat, 28 Apr 2007 03:12:19 GMT

Basically in final version version of ajax Validatos are not compatable with AJAX

http://ajax.asp.net/docs/overview/UpdatePanelOverview.aspx

Re: Probem with hidden validators inside UpdatePanel

chetan.sarode — Sat, 28 Apr 2007 03:09:29 GMT

Check this link

http://weblogs.asp.net/scottgu/archive/2007/01/25/links-to-asp-net-ajax-1-0-resources-and-answers-to-some-common-questions.aspx

Re: Probem with hidden validators inside UpdatePanel

newbie06 — Fri, 27 Apr 2007 23:06:35 GMT

Here is a great link with a temp solution to your problem:

http://weblogs.asp.net/scottgu/archive/2007/01/25/links-to-asp-net-ajax-1-0-resources-and-answers-to-some-common-questions.aspx

Re: Probem with hidden validators inside UpdatePanel

newbie06 — Fri, 27 Apr 2007 22:21:14 GMT

I have the following validators in my UpdatePanel: I set the UpdateMode property to Conditional.

RegularExpressionValidator

CompareValidatorEmail

RequiredFieldValidator

The first time the page is loaded everthing works fine. When I hit the clear button to clear all Textboxes and then try reentering text in the Textboxes the field validators are not firing anymore.

Any fixes?

newbie

Re: Probem with hidden validators inside UpdatePanel

arrdee — Mon, 02 Apr 2007 01:40:09 GMT

On further testing my issue is specifically web part orientated. So the fix that AjaxButter linked to corrects the issue of validators within update panels, but I still experience problems with web parts, specifically those that contain validators where the web part zone is within an update panel. My problem is solved if I put the update panel within the web part zone, and the user control within that, but that means that there has the be either a seperate update panel for every web part, or one large web part with lots of user controls within it that are not distinguished as seperate.

For an example try this scenario.

Add wpm to a page
add an update panel with a web part zone inside
within the wpz add a user control consisting of a text box, required validator control and a button with a server linked event that updates the current time in a label or something

On 1st click of the btn, the label is not refreshed and the validator event fires as expected
Now add text to the text box, the outcome is as expected, validator not fired, label refreshed
Now remove the text. On button click, the validator is fired, but the button event is also fired and the label is refreshed...

I guess my fix for the moment is to add a seperate update panel within the web part zone for every control I add. Not ideal though

Re: Probem with hidden validators inside UpdatePanel

WishStar99 — Fri, 30 Mar 2007 06:12:05 GMT

What kind of validators are you guys talking about? How about some sample here? I have validators inside an updatepanel and they work fine.