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Zone: > NEWSGROUP > Asp.Net Forum > microsoft_downloads.css_friendly_control_adapters Tags:
Item Type: NewsGroup Date Entered: 8/3/2006 8:17:41 AM Date Modified: Subscribers: 0 Subscribe Alert
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nickfoster
Asp.Net User
Adapter for single control - radiobutton8/3/2006 8:17:41 AM

0/0

I am looking to create an adapter for a single control, in this case a radiobutton, so that I can override one of its attributes.  I am looking to override the output of the GroupName property so that I can use the radiobutton in gridviews and actually have it function as intended.

Because my page is using a master page, any radiobutton I place in my gridview is renamed with a unique name and so do not function in a group.  If i give my radiobutton a GroupName of "myGroup" it is renamed "ctl00$cphMain$Wizard1$gvPackages$ctl02$myGroup" which is not very helpful.

I am new to Control Adapters and so far I have looked through the example files to try and work out the best approach.

Is there a way to obtain the html that would be rendered by the standard control and then modify it by replacing part of the html string or am I stuck with writing all the html output myself to completely replace the rendering of the control? ( I tried calling Control.Render but obviously this dissapears into an infinite loop.)  Am I going to have to inspect every property of the Control and rewrite the html in the RenderContent function?

Sorry for the basic questions but all the examples are of complex compound controls and I can't find an example of just rendering a single simple control.

Cheers,
Nick
nickfoster
Asp.Net User
Adapter for single control - radiobutton - viewstate problem8/3/2006 2:26:40 PM

0/0

Below is the code as I have it so far.  This seems to render the radiobutton ok but state of the control is not persisted in the viewstate.  Should this maintain state itself or am I going to have to manually add some code to maintain viewstate as well?

************************************************************************
Imports System
Imports System.Data
Imports System.Collections
Imports System.Configuration
Imports System.Web
Imports System.Web.Security
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.WebParts
Imports System.Web.UI.HtmlControls

Namespace CSSFriendly
  Public Class RadioButtonAdapter
    Inherits System.Web.UI.WebControls.Adapters.WebControlAdapter

    Protected Overrides Sub RenderContents(ByVal writer As System.Web.UI.HtmlTextWriter)
      Dim rb As RadioButton = CType(Control, RadioButton)
      If Not IsNothing(rb) AndAlso rb.Visible Then
        writer.WriteBeginTag("input")
        writer.WriteAttribute("type", "radio")
        writer.WriteAttribute("id", rb.UniqueID)
        writer.WriteAttribute("name", rb.GroupName)
        writer.WriteAttribute("value", rb.ID)
        If rb.CssClass <> String.Empty Then
          writer.WriteAttribute("class", rb.CssClass)
        End If
        If rb.Checked Then
          writer.WriteAttribute("checked", "checked")
        End If
        If rb.Enabled = False Then
          writer.WriteAttribute("disabled", "disabled")
        End If
        If rb.ToolTip <> String.Empty Then
          writer.WriteAttribute("title", rb.ToolTip)
        End If
        If rb.AccessKey <> String.Empty Then
          writer.WriteAttribute("accesskey", rb.AccessKey)
        End If
        writer.Write(HtmlTextWriter.SelfClosingTagEnd)
      End If
    End Sub

    Protected Overrides Sub RenderBeginTag(ByVal writer As System.Web.UI.HtmlTextWriter)
      ' Write the label if the Text attribute is set and TextAlign=Left
      Dim rb As RadioButton = CType(Control, RadioButton)
      If rb.Visible AndAlso rb.Text <> String.Empty AndAlso rb.TextAlign = TextAlign.Left Then
        writer.WriteBeginTag("label")
        writer.WriteAttribute("for", rb.UniqueID)
        writer.Write(HtmlTextWriter.TagRightChar)
        writer.Write(rb.Text)
        writer.WriteEndTag("label")
      End If
    End Sub

    Protected Overrides Sub RenderEndTag(ByVal writer As System.Web.UI.HtmlTextWriter)
      ' Write the label if the Text attribute is set and TextAlign=Right
      Dim rb As RadioButton = CType(Control, RadioButton)
      If rb.Visible AndAlso rb.Text <> String.Empty AndAlso rb.TextAlign = TextAlign.Right Then
        writer.WriteBeginTag("label")
        writer.WriteAttribute("for", rb.UniqueID)
        writer.Write(HtmlTextWriter.TagRightChar)
        writer.Write(rb.Text)
        writer.WriteEndTag("label")
      End If
    End Sub

  End Class
End Namespace
2 Items, 1 Pages 1 |< << Go >> >|


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Adapter for single control - radiobutton - ASP.NET Forums I am looking to create an adapter for a single control, in this case a radiobutton, so that I can override one of its attributes. ...
CSS Friendly Control Adapters - ASP.NET Forums Adapter for single control - radiobutton by nickfoster. No Status ... TreeView CRASHES with ERROR when used with the Wizard control by yousaid. No Status ...
CSS Friendly Control Adapters - Discussions The adapter redefines the layout of the RadioButtonList Control. .... and want to display a GridView control grouped by these categories with a single table ...
Configuring Windows 9x/ME for University Network One is a Dial-Up Adapter for a modem, which might or might not be present on your .... Ensure that the radio button Share-level access control is checked. ...
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ControlAdapter.LoadAdapterControlState Method (System.Web.UI.Adapters) Loads adapter control state information that was saved by ... a group of RadioButton controls might render as a single view on desktop computer browsers. ...
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Download free ASP templates - Free ASP Templates. Likewise, the accesskey for a radio button or checkbox simply toggles its state. This kit's membership control adapters programmatically set the accesskey ...
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