Asp.net 2.0在运行过程中修改Master Page, Thema

不多说了，直接贴代码。研究了好久，总算调通，有些小道道，不注意就会被骗。
呵呵。

using  System;
using  System.Data;
using  System.Configuration;
using  System.Collections;
using  System.Web;
using  System.Web.Security;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;
using  System.Web.UI.HtmlControls;

/**/ /// <summary>
/// Summary description for BlogPage
/// </summary>
public  partial  class  BlogPage : System.Web.UI.Page
{
    private string m_strMasterPageFile;
    protected void Page_PreInit(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            SetPage();            
        }
    }
    设置显示内容#region 设置显示内容
    /**//// <summary>
    /// 设置显示内容
    /// </summary>
    private void SetPage()
    {
        try
        {           
            this.MasterPageFile = m_strMasterPageFile;
        }
        catch
        {
        }
    }
    
    public override string StyleSheetTheme
    {
        get
        {
            try
            {                
                if (Page.Theme == null)
                {                    
                    string BlogName = Request.QueryString["BlogName"];
                    if (BlogName != null && BlogName != "")
                    {
                        DataSet ds = UserInfo.QueryBlog(BlogName);
                        Page.Theme = ds.Tables[0].Rows[0]["ThemaName"].ToString();
                        Session["BlogID"] = ds.Tables[0].Rows[0]["UserID"].ToString();
                        m_strMasterPageFile = this.MasterPageFile = "~/Blog/" + ds.Tables[0].Rows[0]["LayoutName"].ToString() + "MasterPage.master";
                        ArrayList ary;
                        if (Session["VisitList"] == null)
                        {
                            ary = new ArrayList();   
                        }
                        else
                            ary = (ArrayList)Session["VisitList"];
                        if (!ary.Contains((int)ds.Tables[0].Rows[0]["UserID"]))
                        {   // 如果没有访问过
                            ary.Add((int)ds.Tables[0].Rows[0]["UserID"]);
                            Session["VisitList"] = ary;
                            UserInfo.AddBlogVisit((int)ds.Tables[0].Rows[0]["UserID"]);
                        }                      
                        ds.Dispose();
                        ds = null;
                    }
                }
            }
            catch
            {
                Page.Theme = "Default";
                this.Page.MasterPageFile = "~/Blog/DefaultMasterPage.master";
            }
            return Page.Theme;
        } 
    }    
    #endregion
}

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