MasterPage.cs :  » Build-Systems » Draco.NET » Wilson » MasterPages » C# / CSharp Open Source

//**************************************************************//
// Paul Wilson -- www.WilsonDotNet.com -- Paul@WilsonDotNet.com //
// Feel free to use and modify -- just leave these credit lines //
// I also always appreciate any other public credit you provide //
//**************************************************************//
using System;
using System.Collections;
using System.ComponentModel;
using System.Configuration;
using System.Web.UI;
using System.Web.UI.Design;
using System.Web.UI.HtmlControls;

namespace Wilson.MasterPages{
  [ToolboxData("<{0}:MasterPage runat=server></{0}:MasterPage>"),
    ToolboxItem(typeof(WebControlToolboxItem)),
    Designer(typeof(ReadWriteControlDesigner))]
  public class MasterPage : HtmlContainerControl
  {
    private string templateFile;
    private string defaultContent;

    private Control template = null;
    private ContentRegion defaults = new ContentRegion();
    private ArrayList contents = new ArrayList();

    [Category("MasterPage"), Description("Path of Template User Control")] 
    public string TemplateFile {
      get { return this.templateFile; }
      set { this.templateFile = value; }
    }

    [Category("MasterPage"), Description("Control ID for Default Content")] 
    public string DefaultContent {
      get { return this.defaultContent; }
      set { this.defaultContent = value; }
    }

    public MasterPage() {
      this.templateFile = ConfigurationSettings.AppSettings["Wilson.MasterPages.TemplateFile"];
      this.defaultContent = ConfigurationSettings.AppSettings["Wilson.MasterPages.DefaultContent"];
      if (this.defaultContent == null) {
        this.defaultContent = "Content";
      }
    }

    protected override void AddParsedSubObject(object obj) {
      if (obj is ContentRegion) {
        this.contents.Add(obj);
      }
      else {
        this.defaults.Controls.Add((Control)obj);
      }
    }

    protected override void OnInit(EventArgs e) {
      this.BuildMasterPage();
      this.BuildContents();
      base.OnInit(e);
    }

    private void BuildMasterPage() {
      if (this.templateFile == "") {
        throw new Exception("TemplateFile Property for MasterPage must be Defined");
      }
      this.template = this.Page.LoadControl(this.templateFile);
      this.template.ID = this.ID + "_Template";
      
      int count = this.template.Controls.Count;
      for (int index = 0; index < count; index++) {
        Control control = this.template.Controls[0];
        this.template.Controls.Remove(control);
        if (control.Visible) {
          this.Controls.Add(control);
        }
      }
      this.Controls.AddAt(0, this.template);
    }

    private void BuildContents() {
      if (this.defaults.HasControls()) {
        this.defaults.ID = this.defaultContent;
        this.contents.Add(this.defaults);
      }

      foreach (ContentRegion content in this.contents) {
        Control region = this.FindControl(content.ID);
        if (region == null || !(region is ContentRegion)) {
          throw new Exception("ContentRegion with ID '" + content.ID + "' must be Defined");
        }
        region.Controls.Clear();
        
        int count = content.Controls.Count;
        for (int index = 0; index < count; index++) {
          Control control = content.Controls[0];
          content.Controls.Remove(control);
          region.Controls.Add(control);
        }
      }
    }

    protected override void RenderBeginTag(HtmlTextWriter writer) {}
    protected override void RenderEndTag(HtmlTextWriter writer) {}
  }
}