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• Re: Custom TreeView via Inheritance

  Hello Ike, this blogentry of Danny Chen is a good way to get started. Basically you need to create a custom TreeNode class that adds an Attribute property and then make sure that these attributes are rendered by overriding RenderPreText. hope this helps, Stefaan

  Posted to Custom Server Controls (Forum) by srillaert on 3/30/2006

• Re: TreeView, Menu... WebResource.axd

  I have only experience with resources embedded in a custom webcontrols assembly (a 'Class Library' project in visual studio), which is the same situation as with the standard TreeView or the Menu controls of asp.net. In that case one - adds the image to the project - set the build action of this image to 'Embedded Resource' - adds a <Assembly: WebResource("YourImageName", "image/gif")> attribute to the AssemblyInfo.vb - uses GetWebResourceUrl(GetType(YourType), "YourImageName") to get the Url

  Posted to Custom Server Controls (Forum) by srillaert on 2/1/2006

• Re: TableItemStyle indesigner

  Hi Tsauve, have you already tried to make your HeaderStyle a read-only property, something like : public TableItemStyle HeaderStyle { get { if ( _headerStyle == null) { _headerStyle = new TableItemStyle(); } return _headerStyle; } } This is the normally the way to add style properties to controls. Also be careful with the right viewstate management on your _headerStyle. For a full explanation you can check out the book on custom controls by Nikhil Kothari (sorry, I don't know any online resources

  Posted to Custom Server Controls (Forum) by srillaert on 1/31/2006

• Re: TreeView, Menu... WebResource.axd

  Hi Nathan, These gif images are part of the System.Web.dll as embedded resources (just as most of the JavaScript used by the TreeView). The TreeView uses ClientScriptManager.GetWebResourceUrl () to get an URL to these embedded resources. You can use reflector on System.Web.dll to see exactly how this is done. Does this replies all your questions ? greetings, Stefaan

  Posted to Custom Server Controls (Forum) by srillaert on 1/31/2006

• Re: DataList within a composite control

  Hi Paul, You can use the Control.FindControl method to do so. Some sample code is available in this previous post . Hope this helps, Stefaan

  Posted to Custom Server Controls (Forum) by srillaert on 1/31/2006

• Re: How to reference other object in a custom properties?

  Hi Cussuol, DataSourceIDConverter is a TypeConvertor that is part of ASP.NET 2.0, the documentation is available on MSDN . By the way, if the DataSourceIDConverter or one of the other standard TypeConvertors don't fit your needs, you can inherit from ControlIDConverter and override the FilterControl method in which you decide to which controls your custom control can be attached. When you are not using ASP.NET 2.0, I guess you have to write your own TypeConvertor that searches for all the controls

  Posted to Custom Server Controls (Forum) by srillaert on 1/24/2006

• Custom TreeNodes and TreeNodeCollectionEditorDialog

  Hi everyone, I have custom TreeView inheriting from the standard Treeview (let's call it CustomTreeView) and a custom TreeNode class inheriting from, you guessed it, TreeNode (let's call it CustomTreeNode). So far, so good. Developers can add and remove CustomTreeNode objects from the Nodes collection of the CustomTreeView programmatically and in the xml markup. So the following sample works just fine : <ny:CustomTreeView ID="TreeView1" runat="server" ExpandDepth="0" OnTreeNodePopulate="TreeView1_TreeNodePopulate

  Posted to Custom Server Controls (Forum) by srillaert on 1/24/2006

• Re: How to reference other object in a custom properties?

  Orzeh is right on this. Here is some sample code : [System.ComponentModel.TypeConverter(typeof(DataSourceIDConverter))] public String DataSourceID { get { String s = (String)ViewState["DataSourceID"]; return (s == null) ? String.Empty : s; } set { ViewState["DataSourceID"] = value; } } protected Control DataSource { get { if (DataSourceID == String.Empty) return null; else return NamingContainer.FindControl(DataSourceID); } } With the right TypeConvertor you can show a dropdownlist with only the

  Posted to Custom Server Controls (Forum) by srillaert on 1/24/2006

• Re: Problem in Custom Control Unable to find Control To Validate Property

  Have you already tried replacing requiredFieldValidator.ControlToValidate = textBox.ID; by : requiredFieldValidator.ControlToValidate = textBox. Unique ID; hope this helps.

  Posted to Custom Server Controls (Forum) by srillaert on 1/11/2006

• Re: Adding the NavigateURL property to a custom control that inherits WebControl?

  And when you apply the EditorAttribute to this property with as parameter the UrlEditor you get a nice UI for selecting the URL. [EditorAttribute(typeof(System.Web.UI.Design.UrlEditor), typeof(UITypeEditor))] public string NavigateUrl { get { return ( string )ViewState["NavigateUrl"]; } set { ViewState["NavigateUrl"] = value ; } } Have fun.

  Posted to Custom Server Controls (Forum) by srillaert on 1/11/2006