DataBound Custom Server Control [Answered]RSS

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  officialboss

  Member

  34 Points

  177 Posts

  DataBound Custom Server Control

  Dec 11, 2007 08:03 PM|officialboss|LINK

  I am working on a very simple server control that I want to databind to an objectdatasource. I am not sure exactly on how to go about doing it. I was wondering if anyone can help here. My code is below. The server control will bind to MyObject (Business object) which returns a single object. I want to bind the MyInfo property of MyObject to my server control.

   

  [ToolboxData("&lt;{0}:Displayinfo runat=server></{0}:Displayinfo>")]
      [System.ComponentModel.Description("Displayinfo")]
      public class Displayinfo : CompositeControl, INamingContainer
      {
  		private string content;
  	
  
  		
  		protected override void OnPreRender(EventArgs e)
          {
             // Render Control Text
   
              base.OnPreRender(e);
          }
  	}

  // MyObject.cs
  	public class MyObject
  	{
  		private int _myObjectId;
  		public int MyObjectId
  		{
  			set { _myObjectId = value; }
  			get { return _myObjectId; }
  		}
  	
  	
  		private string _myInfo;
          public string MyInfo
          {
              set { _myInfo = value; }
  			get { return _myInfo; }
          }
  	}

   
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  Nai-Dong Jin...

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  3430 Posts

  Re: DataBound Custom Server Control

  Dec 12, 2007 10:23 PM|Nai-Dong Jin - MSFT|LINK

  Hi,

  From your description, it seems that you want to build a data-bound custom server control which shares datasourceID property and databind method, right?

  Generally, we can call these controls as Custom data-bound control, you should make you control inherit from your CompositeDataBoundControl, which is the base class that extends the DataBoundControl class. It implements the typical code required by composite controls, including the code that restores the control's child control hierarchy from view state after a postback is made. It binds to an IEnumerable data source and enumerates the data to build a control tree and serves as the basis for data-bound controls, such as GridView and DetailsView.
  For more information and samples, please refer:

  http://msdn.microsoft.com/en-us/library/ms366539(VS.80).aspx

  Thanks.
  

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  dsa1971

  Member

  52 Points

  148 Posts

  Re: DataBound Custom Server Control

  Dec 14, 2007 03:07 PM|dsa1971|LINK

  Michael,

  My question is similar to the original but I'm not quite sure if your answer applies to my situation or not.  I currently have a custom control which inherits from the CompositeControl.  It contains a couple textbox and some a couple of labels, etc.  I have a property exposing the Text property of the textbox.  The binding works fine one-way but not two-ways.  Any guidance on this would be very helpful.

  Public Class MyTextArea
      Inherits System.Web.UI.WebControls.CompositeControl
  
  
      Private m_textarea As System.Web.UI.WebControls.TextBox
  
  
  <System.ComponentModel.Bindable(True, System.ComponentModel.BindingDirection.TwoWay)> _
      <System.ComponentModel.Description("The textarea text.")> _
      Public Property Text() As String
          Get
              EnsureChildControls()
              Return m_textarea.Text
          End Get
          Set(ByVal value As String)
              EnsureChildControls()
              m_textarea.Text = value
          End Set
      End Property
  
  
  Protected Overrides Sub CreateChildControls()
  ' code to add controls here
  End Sub
  
  
  
  
  End Class
  
  
  End Class

   

   

  custom control Data Bound Control Composite Control Controls