To determine whether a method is overridable, it is not sufficient to check that IsVirtual is true. For a method to be overridable, IsVirtual must be true and IsFinal must be false. For example, a method that is non-virtual might implement an interface method.

The common language runtime requires all methods that implement interface members to be marked as virtual; therefore, the compiler marks the method virtual final. Thus there are cases where a method that is marked as virtual is not overridable.

  public static string GetConnectionString()
        {

            string connStr = String.Format(”server=hostname;user id=dbname; password=password;database=dbname; pooling=false”, “hostname”, “dbname”, “password”);
                return connStr;
            }

        protected void btnProceed_OnClick(object sender, EventArgs e)
        {
            MySql.Data.MySqlClient.MySqlConnection mycon = new MySqlConnection(GetConnectionString());
            if (mycon.State != ConnectionState.Open)
            {
                try
                {
                    mycon.Open();
                    string strQuery = “select * from table”;
                    MySqlDataAdapter adapter = new MySqlDataAdapter(strQuery, mycon);
                    DataSet myDataSet = new DataSet();
                    adapter.Fill(myDataSet, “mytable”);
                }
                catch (MySqlException ex)
                {
                    throw (ex);
                }
            }

        }

1. Right click on Desktop and Go Properties
2. Go to Appearance tab, click on Effects
3. Notice the checked line, use the following method to smooth edges of screen fonts, make sure you choose ClearType instead of Standard.

Try again and Firefox now shows fonts nicely as IE!

First, in the usercontrol, we need to:
1. Register a delegate object:

public delegate void userControlChangedHandler(object sender, EventArgs e);

public event userControlChangedHandler userControlChanged;

Then, we also implement a method that will run when subscribers get notified by the delegate.

 protected virtual void updateProperties(object sender, EventArgs e){

//update usercontrol properties…
if (userControlChanged != null)
    userControlChanged(this, e);

}

and in the parent page, all we need to do is put this in page_init

userControl.userControlChanged += new userControlChangedHandler(aParentMethod);

http://www.news.com.au/business/story/0,27753,25545056-462,00.html

In the mean time, there’s a good Wiki post here http://www.fbwiki.com/index.php?title=PartialTrustIssue which explains the problem.

Update:

Apparently, it’s because my application is using Data Access Application Block, which requires use of the full trust security level. Applying patch 2554 to the source allows applications to run under partial trust scenarios, for example, in a hosted ASP.NET environment. To solve that, download this:

http://www.codeplex.com/entlib/Release/ProjectReleases.aspx?ReleaseId=1339

http://madskristensen.net/post/Compress-WebResourceaxd-in-ASPNET.aspx

http://www.developer.com/net/asp/article.php/3623096

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