| Subject: DataSourceID '<NewDataSource ...>' not working in composite
contro
| Date: Thu, 26 Jan 2006 02:34:02 -0800
| Lines: 38
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|
| I am trying to add databinding support to some composite controls, and
have
| everything working in the relevant properties (DataTextField, etc.),
| including that DataSourceID properly lists all valid datasources on the
page.
|  However, when I choose '<NewDataSource...>', the wizard doesn't fire,
and
| the properly value simply changes to '<NewDataSource...>'.  Is there some
| action I need to conduct on my part to fire the New Data Source wizard?
|
| The following is the code I am using for this property (which maps it to
the
| underlying CheckBox which does all the binding work):
|
|         /// <summary>
|         /// Gets or sets the ID of the control from which the data-bound
| control retrieves its list of data items.
|         /// </summary>
|         /// <value>The ID of a control that represents the data source
from
| which the data-bound control retrieves its data.</value>
|         [IDReferenceProperty(typeof(DataSourceControl))]
|        
|

|         [DefaultValue((string)null)]
|         [Description("The ID of the control from which the data-bound
| control retrieves its list of data items.")]
|         [Category("Data")]
|         public string DataSourceID
|         {
|             get
|             {
|                 EnsureChildControls();
|                 return m_chk.DataSourceID;
|             }
|             set
|             {
|                 EnsureChildControls();
|                 m_chk.DataSourceID = value;
|             }
|         }
|
|
|

"Steven Cheng[MSFT]" wrote:

> Hi Christophe,
>
> Welcome to the ASP.NET newsgroup.
>
> It seems you're going on for your custom webcontrols :).  For the
> DataSourceID property, decorate them with
>
> [IDReferenceProperty(typeof(DataSourceControl))]
> [TypeConverter(typeof(System.Web.UI.Design.WebControls.DataSourceIDConverter
> ))]
>
> is not sufficient, the two attribute can only help the IDE correct manage
> the value of that property or select existing datasource controls on the
> webform.  However, for the "Create New DataSource" wizard you mentioned, it
> depend on the control's design-time ActionList feature:
>
> #DesignerActionList Class  
> http://msdn2.microsoft.com/en-us/library/system.componentmodel.design.design
> eractionlist.aspx
>
> And for those buildin DataBound Controls, they are derived from the
> DataBoundControl class which has implemented some of the designer
> Actions(in the Designer) so that the child control classes and utilize.
> Since our custom control doesn't derive from the base class, the "Create
> New DataSource" wizard won't work....   You can consider derive your custom
> control from the DataBouncControl class and implement those required
> method( do not need to actually put any detailed code there......). For
> example:
>
> namespace WebControlLib
> {
>     [DefaultProperty("Text")]
>     [ToolboxData("<{0}:DSTestControl runat=server></{0}:DSTestControl>")]
>     //[Designer("System.Web.UI.Design.WebControls.DataBoundControlDesigner,
> System.Design, Version=2.0.0.0, Culture=neutral,
> PublicKeyToken=b03f5f7f11d50a3a"),
> AspNetHostingPermission(SecurityAction.InheritanceDemand,
> Level=AspNetHostingPermissionLevel.Minimal),
> AspNetHostingPermission(SecurityAction.LinkDemand,
> Level=AspNetHostingPermissionLevel.Minimal)]
>     public class DSTestControl : DataBoundControl, INamingContainer
>     {
>         private string _dsid;
>
>
>         [Bindable(true)]
>         [Category("Appearance")]
>         [DefaultValue("")]
>         [Localizable(true)]
>         public string Text
>         {
>             get
>             {
>                 String s = (String)ViewState["Text"];
>                 return ((s == null) ? String.Empty : s);
>             }
>
>             set
>             {
>                 ViewState["Text"] = value;
>             }
>         }
>
>
>         [IDReferenceProperty(typeof(DataSourceControl))]
>        
> [TypeConverter(typeof(System.Web.UI.Design.WebControls.DataSourceIDConverter
> ))]
>         public  string DataSourceID
>         {
>             get
>             {
>                 //EnsureChildControls();
>                 //return m_chk.DataSourceID;
>                 return _dsid;
>             }
>             set
>             {
>                 //EnsureChildControls();
>                 //m_chk.DataSourceID = value;
>                 _dsid = value;
>             }
>         }
>
>
>
>         protected override void RenderContents(HtmlTextWriter output)
>         {
>             output.Write("<br/>DataSourceId: " + _dsid);
>         }
>
>         protected override void PerformSelect()
>         {
>             //do nothing;
>             //throw new Exception("The method or operation is not
> implemented.");
>
>         }
>
>         protected override void ValidateDataSource(object dataSource)
>         {
>             //do nothing
>             // throw new Exception("The method or operation is not
> implemented.");
>         }
>     }
> }
>
>
> Hope this helps.
>
> Steven Cheng
> Microsoft Online Support
>
> Get Secure! www.microsoft.com/security
> (This posting is provided "AS IS", with no warranties, and confers no
> rights.)
>
>
>
>
>
>
>
> --------------------
> | Thread-Topic: DataSourceID '<NewDataSource ...>' not working in composite
> contro
> | thread-index: AcYiZAY52qu3zXteSzCNkI1J2ja6Ag==
> | X-WBNR-Posting-Host: 193.172.19.20
> | From: =?Utf-8?B?Q2hyaXN0b3BoZSBQZWlsbGV0?=
> <ChristophePeillet@nospam.nospam>
> | Subject: DataSourceID '<NewDataSource ...>' not working in composite
> contro
> | Date: Thu, 26 Jan 2006 02:34:02 -0800
> | Lines: 38
> | Message-ID: <A9B07C24-7951-4DB3-9785-547210FFE***@microsoft.com>
> | MIME-Version: 1.0
> | Content-Type: text/plain;
> |     charset="Utf-8"
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> | Xref: TK2MSFTNGXA02.phx.gbl
> microsoft.public.dotnet.framework.aspnet.webcontrols:32822
> | X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet.webcontrols
> |
> | I am trying to add databinding support to some composite controls, and
> have
> | everything working in the relevant properties (DataTextField, etc.),
> | including that DataSourceID properly lists all valid datasources on the
> page.
> |  However, when I choose '<NewDataSource...>', the wizard doesn't fire,
> and
> | the properly value simply changes to '<NewDataSource...>'.  Is there some
> | action I need to conduct on my part to fire the New Data Source wizard?
> |
> | The following is the code I am using for this property (which maps it to
> the
> | underlying CheckBox which does all the binding work):
> |
> |         /// <summary>
> |         /// Gets or sets the ID of the control from which the data-bound
> | control retrieves its list of data items.
> |         /// </summary>
> |         /// <value>The ID of a control that represents the data source
> from
> | which the data-bound control retrieves its data.</value>
> |         [IDReferenceProperty(typeof(DataSourceControl))]
> |        
> |
> [TypeConverter(typeof(System.Web.UI.Design.WebControls.DataSourceIDConverter
> ))]
> |         [DefaultValue((string)null)]
> |         [Description("The ID of the control from which the data-bound
> | control retrieves its list of data items.")]
> |         [Category("Data")]
> |         public string DataSourceID
> |         {
> |             get
> |             {
> |                 EnsureChildControls();
> |                 return m_chk.DataSourceID;
> |             }
> |             set
> |             {
> |                 EnsureChildControls();
> |                 m_chk.DataSourceID = value;
> |             }
> |         }
> |
> |
> |
>
>