Receiving data from variable from another form. [* Resovled *]

[steve_rm]

Hello,

I have 2 forms. One is called librarySettings, and another one is called loanBook. When the user wants to loan a book, l want to be able to receive 2 variables from this form, which is DaysBorrowed, and OverdueFine. This way if the settings are changed then the loanbook form will have the updated variables.

This is what l have done, and l have done this before, but can't seen to get it to work. Don't know what is going on here.

LibrarySettings form.

This load the variables data from a database, so that the settings can be updated to a database.
private void frmLibrarySettings_Load(object sender, System.EventArgs e)
		{
			try
			{
				cnn.Open();

				OleDbCommand cmd = cnn.CreateCommand();
				OleDbDataAdapter da = new OleDbDataAdapter();
				DataTable dt = new DataTable();

				cmd.CommandType = CommandType.Text;
				cmd.CommandText = "SELECT * FROM LibrarySettings";
				
				da.SelectCommand = cmd;
				da.Fill(dt);

				upDDays.Value = Convert.ToInt16(dt.Rows[0]["Days"]); //load into a numericUpDown control
				upDFine.Value = Convert.ToInt16(dt.Rows[0]["Fine"]);
			}
			catch ( OleDbException ex )
			{
				MessageBox.Show(ex.Message);
			}
			catch ( Exception ex )
			{
				MessageBox.Show(ex.Message);
			}
		}

//Set up 2 public procedures

                public int fineAmount
		{
			get
			{
				return Convert.ToInt16(upDFine.Value);
			}
		}

		public int DaysToBorrow
		{
			get
			{
				return Convert.ToInt16(upDDays.Value);
			}
		}

That is all for the library settings form


for the loanbook form.

I have declared this in the form at the top of the class

frmLibrarySettings getLibraryDetails = null; //Finds the day and fine amount that has been set in the library settings form

Find out how long the book can be loaned for.

int loanDays = 0;
loanDays = getLibraryDetails.DaysToBorrow; //Get the days the book can be loaned for - error occurs here

The error message l get when this code is executed is " Object reference not set to an instance of an object."

Not sure what l am doing wrong. Hope someone can help

Thanks in advance,

Steve