從vb.net轉換為C＃自定義控件不會顯示在工具箱中

Question

我已經使用了一段時間的一些自定義控件。 幾天前，我做了一個自定義復選框。 由於我不太了解C＃語法，因此我在VB.NET中做到了。 問題是Internet上大多數免費的自定義控件都在C＃中。 我的解決方案是將它們編譯成DLL，並在我的應用程序中使用它。

我繼續將其轉換為C＃，然后嘗試將其添加到DLL中。 它根本不會顯示在工具箱中。 我認為我在VB.NET不需要的代碼中丟失了一些內容，但我不知道它是什么。

這是制作適當的DLL的VB.NET版本，它為我提供了自定義工具。

Public Class ColorCheckBox
    Inherits CheckBox
    Public CheckColor As New SolidBrush(Color.Blue)
    Public IndeterminateColor As New SolidBrush(Color.Red)
    Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
        Dim CheckRegion As New Rectangle(1, 2, 11, 11)

        Dim Points(15) As Point

        Points(0) = New Point(1, 2)
        Points(1) = New Point(4, 2)
        Points(2) = New Point(6, 5)
        Points(3) = New Point(9, 2)
        Points(4) = New Point(12, 2)
        Points(5) = New Point(12, 4)
        Points(6) = New Point(9, 7)
        Points(7) = New Point(12, 10)
        Points(8) = New Point(12, 13)
        Points(9) = New Point(9, 12)
        Points(10) = New Point(6, 9)
        Points(11) = New Point(3, 13)
        Points(12) = New Point(1, 12)
        Points(13) = New Point(1, 10)
        Points(14) = New Point(4, 7)
        Points(15) = New Point(1, 4)

        MyBase.OnPaint(e)

        If CheckState = CheckState.Checked Then
            e.Graphics.FillRectangle(New SolidBrush(Color.White), CheckRegion)
            e.Graphics.FillPolygon(CheckColor, Points)
        ElseIf CheckState = CheckState.Indeterminate Then
            e.Graphics.FillRectangle(New SolidBrush(Color.White), CheckRegion)
            e.Graphics.FillPolygon(IndeterminateColor, Points)

        End If
    End Sub

    Sub New()
        ThreeState = True
    End Sub

    Public ReadOnly Property DBValue As Integer
        Get
            Select Case CheckState
                Case CheckState.Unchecked
                    Return 0
                Case CheckState.Checked
                    Return 1
                Case CheckState.Indeterminate
                    Return 2
                Case Else
                    Return 3
            End Select
        End Get
    End Property
End Class

這是轉換后的代碼，不起作用。 它可以很好地編譯，但是不會像上面那樣給我自定義控件。

using System.Windows.Forms;
using System.Drawing;

namespace ColorCheckBoxCS
{
    public class ColorCheckBox : CheckBox
    {
        public SolidBrush CheckColor = new SolidBrush(Color.Blue);
        public SolidBrush IndeterminateColor = new SolidBrush(Color.Red);
        protected override void OnPaint(PaintEventArgs e)
        {
            Rectangle CheckRegion = new Rectangle(1, 2, 11, 11);

            Point[] Points = new Point[15];

            Points[0] = new Point(1, 2);
            Points[1] = new Point(4, 2);
            Points[2] = new Point(6, 5);
            Points[3] = new Point(9, 2);
            Points[4] = new Point(12, 2);
            Points[5] = new Point(12, 4);
            Points[6] = new Point(9, 7);
            Points[7] = new Point(12, 10);
            Points[8] = new Point(12, 13);
            Points[9] = new Point(9, 12);
            Points[10] = new Point(6, 9);
            Points[11] = new Point(3, 13);
            Points[12] = new Point(1, 12);
            Points[13] = new Point(1, 10);
            Points[14] = new Point(4, 7);
            Points[15] = new Point(1, 4);

            base.OnPaint(e);

            if (CheckState == CheckState.Checked)
            {
                e.Graphics.FillRectangle(new SolidBrush(Color.White), CheckRegion);
                e.Graphics.FillPolygon(CheckColor, Points);
            }
            else if (CheckState == CheckState.Indeterminate)
            {
                e.Graphics.FillRectangle(new SolidBrush(Color.White), CheckRegion);
                e.Graphics.FillPolygon(IndeterminateColor, Points);

            }
        }

        ColorCheckBox()
        {
            ThreeState = true;
        }

        public int DBValue
        {
            get
            {
                switch (CheckState)
                {
                    case CheckState.Unchecked:
                        return 0;
                    case CheckState.Checked:
                        return 1;
                    case CheckState.Indeterminate:
                        return 2;
                    default:
                        return 3;
                }
            }
        }
    }
}

附帶說明一下，如果有人想使用此代碼，請繼續。 它使復選框使用三種狀態並繪制一個X。我將其用於兩級身份驗證系統。 您甚至可以在代碼中設置X的顏色或在控件中進行更改。 在VB.NET中效果很好，如果得到修復，則在C＃中效果很好。 我計划使其取一個值並設置CheckState，但是我首先遇到了這個問題。 如果修復了錯誤，我將使用set重新發布正確的代碼。

永遠花了我點時間才能正確放置點，如果需要，請使用它。

對於任何知道問題所在的人，請幫助。 我不是一個好銷售員。

經修訂的工作守則；

using System.Windows.Forms;
using System.Drawing;

namespace ColorCheckBoxCS
{
    public class ColorCheckBox : CheckBox
    {
        /// <summary>
        /// The color of the X for Checked
        /// </summary>
        public Color CheckColor = Color.Blue;

        /// <summary>
        /// The color of the X for Indeterminate
        /// </summary>
        public Color IndeterminateColor = Color.Red;

        protected override void OnPaint(PaintEventArgs e)
        {
            SolidBrush CheckColorBrush = new SolidBrush(CheckColor);
            SolidBrush IndeterminateColorBrush = new SolidBrush(IndeterminateColor);

            Rectangle CheckRegion = new Rectangle(1, 2, 11, 11);

            Point[] Points = new Point[16];

            Points[0] = new Point(1, 2);
            Points[1] = new Point(4, 2);
            Points[2] = new Point(6, 5);
            Points[3] = new Point(9, 2);
            Points[4] = new Point(12, 2);
            Points[5] = new Point(12, 4);
            Points[6] = new Point(9, 7);
            Points[7] = new Point(12, 10);
            Points[8] = new Point(12, 13);
            Points[9] = new Point(9, 12);
            Points[10] = new Point(6, 9);
            Points[11] = new Point(3, 13);
            Points[12] = new Point(1, 12);
            Points[13] = new Point(1, 10);
            Points[14] = new Point(4, 7);
            Points[15] = new Point(1, 4);

            base.OnPaint(e);

            if (CheckState == CheckState.Checked)
            {
                e.Graphics.FillRectangle(new SolidBrush(Color.White), CheckRegion);
                e.Graphics.FillPolygon(CheckColorBrush, Points);
            }
            else if (CheckState == CheckState.Indeterminate)
            {
                e.Graphics.FillRectangle(new SolidBrush(Color.White), CheckRegion);
                e.Graphics.FillPolygon(IndeterminateColorBrush, Points);
            }
        }

        /// <summary>
        /// Gets or Sets the check state. 0 is Unchecked, 1 is Checked, and 2 is Indeterminate
        /// </summary>
        public int DBValue
        {
            get
            {
                switch (CheckState)
                {
                    case CheckState.Unchecked:
                        return 0;
                    case CheckState.Checked:
                        return 1;
                    case CheckState.Indeterminate:
                        return 2;
                    default:
                        return 3;
                }
            }
            set
            {
                switch (value)
                {
                    case 0:
                        CheckState = CheckState.Unchecked;
                        break;
                    case 1:
                        CheckState = CheckState.Checked;
                        break;
                    case 2:
                        CheckState = CheckState.Indeterminate;
                        break;
                    default:
                        break;
                }


            }

        }



    }
}

Answer 1

好的，代碼有兩個問題：

Point[] Points = new Point[15];

需要是

Point[] Points = new Point[16];

不知道為什么，但是我超出了15。

其次，我必須刪除：

ColorCheckBox()
{
    ThreeState = true;
}

同樣，不知道為什么。 這就是有效的方法。 完成所有設置后，我將在頂部更新代碼。