Archief - C# Winforms: error creating window handle

// GUI parameters
<key1>=<value1>
<key2>=<value2>
// AI parameters
<key3>=<value3>
<key4>=<value4>

    public partial class CostLineReport : UserControl
    {
        #region CONSTANTS
        public static int pnlWidth = 870;
        public static int pnlHeightBase = 112;
        public static int pnlHeightExtended = 415;
        public static int pnlHeightCollapsed = 30;
        public static Color ColorNeutral = Color.FromArgb(176, 196, 222);
        public static Color ColorApprove = Color.FromArgb(173, 255, 47);
        public static Color ColorDisapprove = Color.FromArgb(255, 99, 71);
        public static Image ImageApprove = Image.FromFile(@"Images\tableAdd.png");
        public static Image ImageDisapprove = Image.FromFile(@"Images\tableDelete.png");
        public static Image ImageDetail = Image.FromFile(@"Images\tableDetail.png");
        public static Image ImageCollapse = Image.FromFile(@"Images\compile-warning.png");
        public static Image ImageViewRecords = Image.FromFile(@"Images\table.png");
        public static Image ImageCalculationInclude = Image.FromFile(@"Images\add.png");
        public static Image ImageCalculationExclude = Image.FromFile(@"Images\delete.png");
        #endregion
//etc...

#region CTORS
        public CostLineReport(string Title, string mainText, string detailText, ACostLine line, ApprovalState apst = ApprovalState.Neutral, ViewState vwst = ViewState.Base, DisplayState dpst = DisplayState.Full)
        {
            InitializeComponent();
            _IsCollapsed = false;
            this._ApprovalState = apst;
            this._ViewState = vwst;
            this._DisplayState = dpst;
            this._CalculationState = CalculationState.Excluded;
            this.picApprove.Click += new EventHandler(Approve);
            this.picDisapprove.Click += new EventHandler(Disapprove);
            this.picDetail.Click += new EventHandler(ResizeControl);
            this.picCollapse.Click += new EventHandler(CollapseControl);
            this.picViewRecords.Click += new EventHandler(ShowRecords);
            this.picCalculation.Click += new EventHandler(SwitchCalculateState);
            this.rtMainData.Text = mainText;
            this.rtDetail.Text = detailText;
            this.lblTitle.Text = Title;
            this._CurrentCostline = line;
            new ToolTip().SetToolTip(this.picApprove, "Approve this line");
            new ToolTip().SetToolTip(this.picDisapprove, "Disapprove this line");
            new ToolTip().SetToolTip(this.picCollapse, "Collapse this line");
            new ToolTip().SetToolTip(this.picDetail, "Show detail");
            new ToolTip().SetToolTip(this.picViewRecords, "View associated recordset");
            new ToolTip().SetToolTip(this.picCalculation, "Include/Exclude from calculation");
            this.picApprove.Image = CostLineReport.ImageApprove;
            this.picDisapprove.Image = CostLineReport.ImageDisapprove;
            this.picDetail.Image = CostLineReport.ImageDetail;
            this.picCollapse.Image = CostLineReport.ImageCollapse;
            this.picViewRecords.Image = CostLineReport.ImageViewRecords;
            this.picCalculation.Image = CostLineReport.ImageCalculationExclude;
            Recolor();
            DrawDisplayItems();
        }
        #endregion

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

namespace Classes.CustomControls
{
    public partial class CostLineReport : UserControl, IDisposable
    {
        #region CONSTANTS
        public static int pnlWidth = 870;
        public static int pnlHeightBase = 112;
        public static int pnlHeightExtended = 415;
        public static int pnlHeightCollapsed = 30;
        public static Color ColorNeutral = Color.FromArgb(176, 196, 222);
        public static Color ColorApprove = Color.FromArgb(173, 255, 47);
        public static Color ColorDisapprove = Color.FromArgb(255, 99, 71);
        public static Image ImageApprove = Image.FromFile(@"Images\tableAdd.png");
        public static Image ImageDisapprove = Image.FromFile(@"Images\tableDelete.png");
        public static Image ImageDetail = Image.FromFile(@"Images\tableDetail.png");
        public static Image ImageCollapse = Image.FromFile(@"Images\compile-warning.png");
        public static Image ImageViewRecords = Image.FromFile(@"Images\table.png");
        public static Image ImageCalculationInclude = Image.FromFile(@"Images\add.png");
        public static Image ImageCalculationExclude = Image.FromFile(@"Images\delete.png");
        #endregion

        #region FIELDS
        private CostLineReportData _Costlinereportdata;
        private ToolTip ttpApprove;
        private ToolTip ttpDisapprove;
        private ToolTip ttpCollapse;
        private ToolTip ttpDetail;
        private ToolTip ttpViewRecords;
        private ToolTip ttpCalculation;
        #endregion

        #region CTORS
        public CostLineReport(CostLineReportData line)
        {
            InitializeComponent();
            //
            this._Costlinereportdata = line;
            //
            this.picApprove.Click += new EventHandler(Approve);
            this.picDisapprove.Click += new EventHandler(Disapprove);
            this.picDetail.Click += new EventHandler(ResizeControl);
            this.picCollapse.Click += new EventHandler(CollapseControl);
            this.picViewRecords.Click += new EventHandler(ShowRecords);
            this.picCalculation.Click += new EventHandler(SwitchCalculateState);
            //
            this.rtMainData.Text = _Costlinereportdata.Maintext;
            this.rtDetail.Text = _Costlinereportdata.Detailtext; ;
            this.lblTitle.Text = _Costlinereportdata.Title;
            //
            ttpApprove = new ToolTip();
            ttpDisapprove = new ToolTip();
            ttpCollapse = new ToolTip();
            ttpDetail = new ToolTip();
            ttpViewRecords = new ToolTip();
            ttpCalculation = new ToolTip();
            ttpApprove.SetToolTip(this.picApprove, "Approve this line");
            ttpDisapprove.SetToolTip(this.picDisapprove, "Disapprove this line");
            ttpCollapse.SetToolTip(this.picCollapse, "Collapse this line");
            ttpDetail.SetToolTip(this.picDetail, "Show detail");
            ttpViewRecords.SetToolTip(this.picViewRecords, "View associated recordset");
            ttpCalculation.SetToolTip(this.picCalculation, "Include/Exclude from calculation");
            //
            this.picApprove.Image = CostLineReport.ImageApprove;
            this.picDisapprove.Image = CostLineReport.ImageDisapprove;
            this.picDetail.Image = CostLineReport.ImageDetail;
            this.picCollapse.Image = CostLineReport.ImageCollapse;
            this.picViewRecords.Image = CostLineReport.ImageViewRecords;
            this.picCalculation.Image = CostLineReport.ImageCalculationExclude;
            //
            Recolor();
        }
        #endregion

        #region PROPERTIES
        public RichTextBox MainTextBox
        { get { return this.rtMainData; } }
        public RichTextBox DetailTextBox
        { get { return this.rtDetail; } }
        public Label TitleLabel
        { get { return this.lblTitle; } }
        public PictureBox CalculateControl
        { get { return this.picCalculation; } }
        #endregion

        #region METHODS
        private void Approve(object o, EventArgs e)
        {
            _Costlinereportdata.Approve();
            Recolor();
        }
        private void Disapprove(object o, EventArgs e)
        {
            _Costlinereportdata.Disapprove();
            Recolor();
        }
        private void ResizeControl(object o, EventArgs e)
        {
            _Costlinereportdata.SwitchSize();
            switch(_Costlinereportdata.Viewstate)
            {
                case ViewState.Base:
                    this.Height = CostLineReport.pnlHeightBase;
                    break;
                case ViewState.Extended:
                    this.Height = CostLineReport.pnlHeightExtended;
                    break;
            }
        }
        private void CollapseControl(object o, EventArgs e)
        {
            _Costlinereportdata.Collapse();
            if (_Costlinereportdata.Collapsed)
                this.Height = CostLineReport.pnlHeightCollapsed;
            else
                this.Height = CostLineReport.pnlHeightBase;
        }
        private void Recolor()
        {
            switch (_Costlinereportdata.Approvalstate)
            {
                case ApprovalState.Approved:
                    foreach (Control c in pnlColorIndicator.Controls)
                    {
                        if (c is PictureBox)
                            ((PictureBox)c).BackColor = CostLineReport.ColorApprove;
                    }
                    pnlColorIndicator.BackColor = CostLineReport.ColorApprove;
                    break;
                case ApprovalState.Disapproved:
                    foreach (Control c in pnlColorIndicator.Controls)
                    {
                        if (c is PictureBox)
                            ((PictureBox)c).BackColor = CostLineReport.ColorDisapprove;
                    }
                    pnlColorIndicator.BackColor = CostLineReport.ColorDisapprove;
                    break;
                case ApprovalState.Neutral:
                    foreach (Control c in pnlColorIndicator.Controls)
                    {
                        if (c is PictureBox)
                            ((PictureBox)c).BackColor = CostLineReport.ColorNeutral;
                    }
                    pnlColorIndicator.BackColor = CostLineReport.ColorNeutral;
                    break;
            }
        }
        private void ShowRecords(object sender, EventArgs e)
        {
            if (this._Costlinereportdata.Costline.LocalData != null)
            {
                using (Forms.frmCostlineRecords f = new Forms.frmCostlineRecords(this._Costlinereportdata.Costline.LocalData))
                {
                    f.ShowDialog();
                }
            }
            else
                MessageBox.Show("This line has no records associated to it. The detailed list cannot be shown.",
                                "Can't show form",
                                MessageBoxButtons.OK,
                                MessageBoxIcon.Information);
        }
        private void SwitchCalculateState(object sender, EventArgs e)
        {
            if (this._Costlinereportdata.Calculationstate == CalculationState.Included)
            {
                this._Costlinereportdata.Calculationstate = CalculationState.Excluded;
                this.picCalculation.Image = CostLineReport.ImageCalculationExclude;
            }
            else
            {
                this._Costlinereportdata.Calculationstate = CalculationState.Included;
                this.picCalculation.Image = CostLineReport.ImageCalculationInclude;
            }
        }
        public void SetCalculateState(CalculationState st)
        {
            switch (st)
            {
                case CalculationState.Included:
                    this._Costlinereportdata.Calculationstate = CalculationState.Excluded;
                    break;
                case CalculationState.Excluded:
                    this._Costlinereportdata.Calculationstate = CalculationState.Included;
                    break;
            }
            this.SwitchCalculateState(this, null);
        }
        #endregion

        #region INTERFACE_IMEPLEMENTS
        void IDisposable.Dispose()
        {
            this._Costlinereportdata = null;
            this.picApprove.Image.Dispose();
            this.picCalculation.Image.Dispose();
            this.picCollapse.Image.Dispose();
            this.picDetail.Image.Dispose();
            this.picDisapprove.Image.Dispose();
            this.picViewRecords.Image.Dispose();
            this.rtDetail.Dispose();
            this.rtMainData.Dispose();
            this.lblDivider.Dispose();
            this.lblDivider2.Dispose();
            this.lblDivider3.Dispose();
            this.lblDivider4.Dispose();
            this.lblTextDivider.Dispose();
            this.lblTitle.Dispose();
            this.picApprove.Dispose();
            this.picCalculation.Dispose();
            this.picCollapse.Dispose();
            this.picDetail.Dispose();
            this.picDisapprove.Dispose();
            this.picViewRecords.Dispose();
            this.pnlColorIndicator.Dispose();
            ttpApprove.Dispose();
            ttpDisapprove.Dispose();
            ttpCollapse.Dispose();
            ttpDetail.Dispose();
            ttpViewRecords.Dispose();
            ttpCalculation.Dispose();
            base.Dispose(true);
        }
        #endregion
    }
}

CostLineReport - System.Windows.Forms.UserControl
-lblDivider - System.Windows.Forms.Label
-lblDivider2 - System.Windows.Forms.Label
-lblDivider3 - System.Windows.Forms.Label
-lblDivider4 - System.Windows.Forms.Label
-lblTextDivider - System.Windows.Forms.Label
-lblTitle - System.Windows.Forms.Label
-lblTopDivider - System.Windows.Forms.Label
-picApprove - System.Windows.Forms.PictureBox
-picCalculation - System.Windows.Forms.PictureBox
-picCollapse - System.Windows.Forms.PictureBox
-picDetail - System.Windows.Forms.PictureBox
-picDisapprove - System.Windows.Forms.PictureBox
-picViewRecords - System.Windows.Forms.PictureBox
-pnlColorIndicator - System.Windows.Forms.Panel
-rtDetail - System.Windows.Forms.RichTextBox
-rtMaindata - System.Windows.Forms.RichTextBox

            while (pnlCenterRightControls.Controls.Count > 0)
            {
                pnlCenterRightControls.Controls[0].Dispose();
            }
            GC.Collect();

foreach (Classes.CustomControls.CostLineReportData c in SelectedCostlineReports)
            {
                Classes.CustomControls.CostLineReport r = c.ToControl();
                r.CalculateControl.Click += delegate(object o, EventArgs e) { GetCostCalculation(); };
                this.pnlCenterRightControls.Controls.Add(r);
            }

            this.picApprove.Image.Dispose();
            this.picCalculation.Image.Dispose();
            this.picCollapse.Image.Dispose();
            this.picDetail.Image.Dispose();
            this.picDisapprove.Image.Dispose();
            this.picViewRecords.Image.Dispose();