Questions on UI for ASP.NET AJAX Forum

3 answers

178 views

HTTP Session gets very large when RadCaptcha images are added using GUIDs

We are using Telerik.Wb.UI rev 2010.2.713.20, VB.NET, and IIS 7.

Following is a "telerik:RadCaptcha" element in one of our web pages:

<telerik:RadCaptcha ID="RadCaptcha1" ImageStorageLocation="Session"
           runat="server" ErrorMessage="Page not valid. The code you entered is not valid."
           ValidationGroup="vgAudio"
           ValidatedTextBoxID="rcTextBox1"
           Display="None">
           <CaptchaImage
                EnableCaptchaAudio="true"
                RenderImageOnly="true"
                ImageCssClass="rcCaptchaImage"
                BackgroundColor="#609f0a"
                TextColor="White"
                BackgroundNoise="None" />
</telerik:RadCaptcha>

We have been noticing that each time the page is refreshed/reloaded, a Captcha Image is added to the Session using a new GUID as the key. The problem we are running into is that the session object gets very large as crawlers load this page many many time over the life of a single session. The Session gets so large that we have to run a scheduled task to forcefully abandon the session periodically.

We have used the "CaptchaMaxTimeout" property to set the timeout to just a couple of minutes and observe that Captcha images do not seem to be removed from the cache (Session) when the timeout period expires.

How can I prevent/limit caching of Captcha images to avoid this situation?

Captcha

answered on 03 Dec 2012

2 answers

139 views

[Solved] Is DataFormatString broken?

I am setting a label DataFormatString for my line series and I noticed that it is not taking effect. The datasource I am providing to the chart contains a score as a double. I wanted to provide the {0:F} formatter so that I do not display unnecessarily long precision.

With the following markup:

<LabelsAppearance DataFormatString="{0:F}">

<TextStyle Bold="true" Color="#003366" />

</LabelsAppearance>

If the data is 56.1, the label is 56

With this markup:

<LabelsAppearance>

<TextStyle Bold="true" Color="#003366" />

</LabelsAppearance>

If the data is 56.1, the label is 56.1

Is my data format string incorrect, or is it just not working?

Chart (HTML5)

answered on 03 Dec 2012

3 answers

71 views

RadSlider with 2 handlers.

How can I set values for two handlers in a rad slider... When I move my handlers, the respective value of my handler should be displayed.. Can anyone help me??? I do not need the tool tip sample.. I want to display in two textboxes..

SkinManager

answered on 03 Dec 2012

3 answers

187 views

InsertCommand will not fire

I'm trying to manually insert a row into an SQL table through the RadGrid's insert row function. My problem is that the InsertCommand event will not fire. Here's some code:

<telerik:RadGrid ID="grdDesc" runat="server" AutoGenerateColumns="false">

<MasterTableView CommandItemDisplay="Top" EditMode="InPlace" DataKeyNames="Descrip"

InsertItemPageIndexAction="ShowItemOnCurrentPage" ShowHeader="false">

<Columns>

<telerik:GridEditCommandColumn ButtonType="PushButton" UniqueName="Edit">

</telerik:GridEditCommandColumn>

<telerik:GridBoundColumn DataField="Descrip" UniqueName="Descrip">

</telerik:GridBoundColumn>

</Columns>

</MasterTableView>

<ClientSettings>

<Scrolling UseStaticHeaders="true" AllowScroll="true" />

</ClientSettings>

</telerik:RadGrid>

<telerik:RadInputManager runat="server" ID="RadInputManager1" Enabled="true">

<telerik:TextBoxSetting BehaviorID="TextBoxSetting1">

</telerik:TextBoxSetting>

</telerik:RadInputManager>

Visual Basic code:

Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load

...

Dim ctxSql As LINQtoSQLDataContext = New LINQtoSQLDataContext()

If chkDesc.Checked = True Then

grdDesc.Visible = True

Dim descrips = From c In ctxSql.COMBOBOXes Where c.fieldname = "DESCRIP" Select New With {c.descrip}

grdDesc.DataSource = descrips

grdDesc.DataBind()

Else

grdDesc.Visible = False

End If

...

End Sub

Protected Sub grdDesc_ItemCreated(ByVal sender As Object, ByVal e As GridItemEventArgs) Handles grdDesc.ItemCreated

If TypeOf e.Item Is GridEditableItem AndAlso (e.Item.IsInEditMode) Then

Dim editableItem As GridEditableItem = DirectCast(e.Item, GridEditableItem)

Dim textBox = (DirectCast(editableItem.EditManager.GetColumnEditor("Descrip"), GridTextBoxColumnEditor)).TextBoxControl

textBox.ID = "TextBox1"

Dim inputSetting As InputSetting = RadInputManager1.GetSettingByBehaviorID("TextBoxSetting1")

inputSetting.TargetControls.Add(New TargetInput(textBox.UniqueID, True))

inputSetting.InitializeOnClient = True

inputSetting.Validation.IsRequired = True

End If

End Sub

Protected Sub grdDesc_InsertCommand(sender As Object, e As Telerik.Web.UI.GridCommandEventArgs) Handles grdDesc.InsertCommand

Dim ctxSql As LINQtoSQLDataContext = New LINQtoSQLDataContext()

Dim custFileID = ctxSql.CUSTFILEs.Where(Function(c) c.CUSTNO = cboCustNew.SelectedValue).Single.CUSTFILE

Dim newComboBox As COMBOBOX = New COMBOBOX()

newComboBox.custfile = custFileID

newComboBox.department = -1

newComboBox.fieldname = "DESCRIP"

newComboBox.descrip = ""

ctxSql.COMBOBOXes.InsertOnSubmit(newComboBox)

End Sub

I can tell you the ItemCreated event DOES fire and runs successfully. I just don't understand why the InsertCommand event doesn't fire. If anybody can tell me what I'm missing, it would be appreciated.

Thanks,
Patrick

Grid

answered on 03 Dec 2012

18 answers

1.2K+ views

Excel export: The file you are trying to open, '[filename]', is in a different format than specified by the file extension

Hello!

When I'm exporting to Excel (HTML or ExcelML) and when I'm opening exported file I'm getting this error/notification:

    
            "The file you are trying to open, '[filename]', is in a different
            format than specified by the file extension. Verify that the file is
            not corrupted and is from a trusted source before opening the file. Do
            you want to open the file now?"  (Yes | No | Help)

Is there any workaround (without changing registry/excel settings) for this to make excel not showing this question?

Thanks

EDIT: Ok. I've found solution for my problem here:

http://www.grinn.net/blog/dev/2008/06/file-you-are-trying-to-open-is-in.html

Grid

answered on 03 Dec 2012

2 answers

109 views

[Solved] Demo is not working

General Discussions

answered on 03 Dec 2012

2 answers

90 views

[Solved] Hiding the Expand in the grid

I have a hierarchical grid that I have been implementing security on.

What I have done is limit the user to see only data they are allowed to see. So in the databind I skip over it if the user does not have access to that level of detail. I would also like to remove the expand if they dont have access to the detailed info. Anyway to do that?

Grid

answered on 03 Dec 2012

4 answers

668 views

Hide/Show Certain RadGrid Context Menu Items

Hi there, I have a context menu showing when the radgrid is right clicked which displays options "email user", "email mass users", "email users who have finished".

I have a radgrid which is populated with data which shows whether users have started or not started their courses. I have a column called "HasStarted" which displays false and true depending on whether or not they have started. When I right click on a row which has "HasStarted" as false I want "email user", "email mass users" to appear in the context menu and when I click on a row which has "HasStarted" as true I want "email users who have finished" to only appear in the context menu. The context menu works and the items run the correct cases just not sure how to hide and show certain items depending on the item clicked on. Any help will be appreciated thanks.

Grid

answered on 03 Dec 2012

3 answers

58 views

Strange behaviour on column resize

hi,
I'm making some test on your ajax grid and I've found it great but I've found an annoying problem regarding column resize.

This problem is present in your demo as well so you can easly verify it.
Go to http://demos.telerik.com/aspnet-ajax/grid/examples/client/resizing/defaultcs.aspx

Try to resize column by clicking between "Address" and "Postal Code", all columns width are affected by this action and their width change.
Please let me know if there is a way to work around this behaviour.

thanks a lot for your help

Grid

answered on 03 Dec 2012

1 answer

95 views

Custom Filtering for Template Column

Hi,

I have a Rad Grid control that is bound to a data source which has objects in it.
I use the object properties to feed the template in the template columns.

Please show me how can I implement custom filtering, which events do I need to handle ?
I need a way from which I can use the object and then decided if this row should be filtered or not.
The out of the box filtering is not going to work for my case.

I cant find any examples, please help.

Thanks
Karan

Grid

answered on 03 Dec 2012