Sto cercando di creare un semplice controllo utente che è un dispositivo di scorrimento. Quando aggiungo un AjaxToolkit SliderExtender al controllo utente ottengo questo errore (* & $ # () @ #:
Server Error in '/' Application. The Controls collection cannot be modified because the control contains code blocks (i.e. `<% ... %>`). Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Web.HttpException: The Controls collection cannot be modified because the control contains code blocks (i.e. `<% ... %>`).
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[HttpException (0x80004005): The Controls collection cannot be modified because the control contains code blocks (i.e. `<% ... %>`).] System.Web.UI.ControlCollection.Add(Control child) +8677431 AjaxControlToolkit.ScriptObjectBuilder.RegisterCssReferences(Control control) in d:\E\AjaxTk-AjaxControlToolkit\Release\AjaxControlToolkit\ExtenderBase\ScriptObjectBuilder.cs:293 AjaxControlToolkit.ExtenderControlBase.OnLoad(EventArgs e) in d:\E\AjaxTk-AjaxControlToolkit\Release\AjaxControlToolkit\ExtenderBase\ExtenderControlBase.cs:306 System.Web.UI.Control.LoadRecursive()
+50 System.Web.UI.Control.LoadRecursive()
+141 System.Web.UI.Control.LoadRecursive()
+141 System.Web.UI.Control.LoadRecursive()
+141 System.Web.UI.Control.LoadRecursive()
+141 System.Web.UI.Control.LoadRecursive()
+141 System.Web.UI.Control.LoadRecursive()
+141 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627
Version Information: Microsoft .NET Framework Version:2.0.50727.3074; ASP.NET Version:2.0.50727.3074
Ho provato a mettere un segnaposto nel controllo utente e ad aggiungere la casella di testo e l'estensione del dispositivo di scorrimento al segnaposto a livello di codice e continuo a ricevere l'errore.
Ecco il semplice codice:
<table cellpadding="0" cellspacing="0" style="width:100%">
<tbody>
<tr>
<td></td>
<td>
<asp:Label ID="lblMaxValue" runat="server" Text="Maximum" CssClass="float_right" />
<asp:Label ID="lblMinValue" runat="server" Text="Minimum" />
</td>
</tr>
<tr>
<td style="width:60%;">
<asp:CheckBox ID="chkOn" runat="server" />
<asp:Label ID="lblPrefix" runat="server" />:
<asp:Label ID="lblSliderValue" runat="server" />
<asp:Label ID="lblSuffix" runat="server" />
</td>
<td style="text-align:right;width:40%;">
<asp:TextBox ID="txtSlider" runat="server" Text="50" style="display:none;" />
<ajaxToolkit:SliderExtender ID="seSlider" runat="server"
BehaviorID="seSlider"
TargetControlID="txtSlider"
BoundControlID="lblSliderValue"
Orientation="Horizontal"
EnableHandleAnimation="true"
Length="200"
Minimum="0"
Maximum="100"
Steps="1" />
</td>
</tr>
</tbody>
</table>
Qual è il problema?
@Daniel P
suggerimento.