ConfigureBlocks.cs

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using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;


namespace Sample_Environment_Control_Interface.Dialogs.Blocks
{
    public partial class ConfigureBlocks : Form
    {
        //Temporary dictionary to contain the configs blocks
        private Seci.BlockDictionary _tempBlocks = new Seci.BlockDictionary();
        private Boolean _changesMade = false;

        public ConfigureBlocks()
        {
            InitializeComponent();
        }

        private void configureBlocks_Load(object sender, EventArgs e)
        {
            //Disable datagrid sorting
            foreach (DataGridViewColumn i in dataGridView1.Columns)
            {
                i.SortMode = DataGridViewColumnSortMode.NotSortable;
            }

            //Copy/clone current config blocks on to tempblocks
            _tempBlocks = (Seci.BlockDictionary)Seci.SeciInterface.Blocks.Clone();

            //Check if tempblocks is null, i.e. no blocks in config
            if (_tempBlocks == null)
            {
                //declare new instance
                _tempBlocks = new Seci.BlockDictionary();
            }          

            updateDataGrid();

        }

        private void updateDataGrid()
        {
            dataGridView1.Rows.Clear();

            //Main config blocks
            if (_tempBlocks != null)
            {
                for (int i = 0; i < _tempBlocks.Count; ++i)
                {
                    Seci.BlockInfo temp = _tempBlocks[i];

                    dataGridView1.Rows.Add(temp.BlockName, temp.BlockUnits, temp.OwningComponent,
                        temp.ParentVI.Substring(temp.ParentVI.LastIndexOf('\\') + 1),
                        temp.UnderRunControl, temp.LowerLimit, temp.UpperLimit,
                        temp.BlockEnabled);

                }
            }

            dataGridView1.Sort(dataGridView1.Columns[0], ListSortDirection.Ascending);
        }

        private void btnAdd_Click(object sender, EventArgs e)
        {
            AddEditBlock addBlock = new AddEditBlock();
            addBlock.Dictionary = _tempBlocks;

            if (addBlock.ShowDialog() == DialogResult.OK)
            {
                _changesMade = true;
                //update datagrid
                updateDataGrid();
            }
        }

        private void btnEdit_Click(object sender, EventArgs e)
        {
            if (dataGridView1.CurrentRow != null)
            {
                //Check block is not part of a component, as these are not editable bar runcontrol
                if (dataGridView1.CurrentRow.Cells[2].Value == null)
                {
                    AddEditBlock editBlock = new AddEditBlock();
                    editBlock.Dictionary = _tempBlocks;

                    editBlock.Block = (Seci.BlockInfo)_tempBlocks[dataGridView1.CurrentRow.Cells[colName.Name].Value.ToString()];

                    if (editBlock.ShowDialog() == DialogResult.OK)
                    {
                        _changesMade = true;
                        //update datagrid
                        updateDataGrid();
                    }
                }
                else
                {
                    MessageBox.Show("The selected block cannot be edited as it is part of a component. However, the run-control settings can be changed via the table."
                    , "Cannot edit component block", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                }
            }
        }

        private void btnDelete_Click(object sender, EventArgs e)
        {
            if (dataGridView1.CurrentRow != null)
            {
                //Check block is not part of a component, as these are not editable bar runcontrol
                if (dataGridView1.CurrentRow.Cells[2].Value == null)
                {
                    //delete the currently selected data row
                    if (dataGridView1.CurrentRow != null)
                    {
                        _tempBlocks.Remove(dataGridView1.CurrentRow.Cells[colName.Name].Value.ToString());
                        dataGridView1.Rows.RemoveAt(dataGridView1.CurrentRow.Index);
                        _changesMade = true;
                    }
                }
                else
                {
                    MessageBox.Show("The selected block cannot be deleted as it is part of a component."
                    , "Cannot delete component block", MessageBoxButtons.OK, MessageBoxIcon.Warning);
                }
            }
        }

        private void btnSetNexus_Click(object sender, EventArgs e)
        {
            SetNexusInfo nexus = new SetNexusInfo();

            if (_tempBlocks != null)
            {
                //Copy/clone current config blocks on to tempblocks
                nexus.blocksNexus = (Seci.BlockDictionary)_tempBlocks.Clone();
            }

            if (nexus.ShowDialog() == DialogResult.OK)
            {
                _tempBlocks = nexus.blocksNexus;
                _changesMade = true;
            }
        }

        private void btnOK_Click(object sender, EventArgs e)
        {
            //Pause threads
            SECI_GUI.Pause_Timers();

            //Copy tempblocks onto main config blocks
            Seci.SeciInterface.Blocks = _tempBlocks;

            if (Seci.SeciInterface.SeciStatus.UseDaeMonitorVi)
            {
                Seci.SeciInterface.DAEMonitor_SetBlocks();
            }

            //Restart threads
            SECI_GUI.Resume_Timers();

            if (_changesMade)
            {
                DialogResult = DialogResult.OK;
            }
            else
            {
                DialogResult = DialogResult.Cancel;
            }

            Close();
        }

        //Values changed
        private void dataGridView1_CellValidated(object sender, DataGridViewCellEventArgs e)
        {
            doChanges((Seci.BlockInfo)_tempBlocks[dataGridView1.CurrentRow.Cells[colName.Name].Value.ToString()]);
        }

        private void doChanges(Seci.BlockInfo block)
        {
            //make changes to run-control, visibility and enabled only
            if (dataGridView1.CurrentCell == dataGridView1.CurrentRow.Cells["colRuncontrol"])
            {
                block.UnderRunControl = (bool)dataGridView1.CurrentRow.Cells["colRuncontrol"].Value;
            }
            else if (dataGridView1.CurrentCell == dataGridView1.CurrentRow.Cells["colLower"])
            {
                try
                {
                    block.LowerLimit = Convert.ToDouble(dataGridView1.CurrentRow.Cells["colLower"].Value);
                }
                catch
                {
                    MessageBox.Show("Invalid value enter; value rest to previous value.", "Invalid Value", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    dataGridView1.CurrentRow.Cells["colLower"].Value = block.LowerLimit;
                }
            }
            else if (dataGridView1.CurrentCell == dataGridView1.CurrentRow.Cells["colUpper"])
            {
                try
                {
                    block.UpperLimit = Convert.ToDouble(dataGridView1.CurrentRow.Cells["colUpper"].Value);
                }
                catch
                {
                    MessageBox.Show("Invalid value enter; value rest to previous value.", "Invalid Value", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    dataGridView1.CurrentRow.Cells["colUpper"].Value = block.UpperLimit;
                }

            }
            else if (dataGridView1.CurrentCell == dataGridView1.CurrentRow.Cells["colEnabled"])
            {
                block.BlockEnabled = (bool)dataGridView1.CurrentRow.Cells["colEnabled"].Value;
            }
        }
    }
}