Control Adapter for a RadioButton, (stuck on the RSS

• • Reply
  jasonhillpdx

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  Control Adapter for a RadioButton, (stuck on the

  Nov 12, 2007 12:25 PM|jasonhillpdx|LINK

  Hi All,

  I'm trying to write a control adapter for a Radiobutton, so that I can use the CSSClass property of the server control and not get a <span> wrapped around it. I've included my work so far, but I get an error on postback about Event validation, suggesting that I use the ClientScriptManager.RegisterForEventValidation method. I've tried to do this, but apparently don't have it in the right place. Could someone take a quick look at my code and point me in the right direction?
  
  

  Regards,
  Jason 

  using System;
  using System.IO;
  using System.Web;
  using System.Web.Configuration;
  using System.Web.UI;
  using System.Web.UI.WebControls;
  using System.Web.UI.HtmlControls;
  using System.Web.UI.MobileControls.Adapters;
  
  
  namespace CSSFriendly
  {
      [SupportsEventValidation]
  
  
      public class RadioButtonAdapter : System.Web.UI.WebControls.Adapters.WebControlAdapter
      {
  
  
          private RadioButton _control;
  
  
          public RadioButtonAdapter()
          {
              // Do nothing;
          }
  
  
          public new RadioButton Control
          {
              get
              {
                  return _control;
              }
          }
  
  
          protected override void RenderBeginTag(HtmlTextWriter writer)
          {
              //do.nothing
          }
  
  
          protected override void RenderContents( HtmlTextWriter writer)
          {
            
              //add attributes to the Control
              writer.AddAttribute(HtmlTextWriterAttribute.Type, "radio");
              writer.AddAttribute(HtmlTextWriterAttribute.Id, Control.UniqueID);
              writer.AddAttribute(HtmlTextWriterAttribute.Name, Control.GroupName);
              writer.AddAttribute(HtmlTextWriterAttribute.Value, Control.ID);
              if (!string.IsNullOrEmpty(Control.CssClass))
              {
                  writer.AddAttribute(HtmlTextWriterAttribute.Class, Control.CssClass);
              }
              if (Control.Checked)
              {
                  writer.AddAttribute(HtmlTextWriterAttribute.Checked, "checked");
              }
              if (!Control.Enabled)
              {
                  writer.AddAttribute(HtmlTextWriterAttribute.Disabled, "disabled");
              }
              if (!string.IsNullOrEmpty(Control.ToolTip))
              {
                  writer.AddAttribute(HtmlTextWriterAttribute.Title, Control.ToolTip);
              }
              if (!string.IsNullOrEmpty(Control.AccessKey))
              {
                  writer.AddAttribute(HtmlTextWriterAttribute.Accesskey, Control.AccessKey);
              }
  
  
  
  
              //render the Control
              writer.RenderBeginTag(HtmlTextWriterTag.Input);
              writer.RenderEndTag(); // </input>
  
  
              writer.AddAttribute("for", Control.UniqueID);
              writer.RenderBeginTag(HtmlTextWriterTag.Label);
              writer.Write(Control.Text);
              writer.RenderEndTag(); // </label>
  
  
              Page.ClientScript.RegisterForEventValidation(Control.UniqueID);
          }
          protected override void RenderEndTag(HtmlTextWriter writer)
          {
              //do.nothing
          }
          protected override void OnInit(EventArgs e)
          {
              _control = (RadioButton)base.Control;
              _control.Checked = true;
              base.OnInit(e);
          }
  
  
      }
  }

   

   

• • Reply
  corbenleek

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  Re: Control Adapter for a RadioButton, (stuck on the

  Jul 31, 2013 05:52 AM|corbenleek|LINK

  Hi,

  You have to register the value trough Page.ClientScript.RegisterForEventValidation(list.UniqueID, item.Value) in de render method.

  You can also look here

  http://chuchuva.com/pavel/2009/12/how-to-use-clientscriptmanager-registerforeventvalidation-method/

  control adapter