【发布时间】:2016-03-11 00:25:17
【问题描述】:
我有一些自定义控件已经使用了一段时间。几天前,我做了一个自定义复选框。由于我不太了解 C# 语法,所以我在 VB.NET 中编写了它。问题是互联网上的大多数免费自定义控件都是用 C# 编写的。我的解决方案是将它们编译成 DLL 并在我的应用程序中使用。
我继续将此转换为 C# 并尝试将其添加到我的 DLL 中。它根本不会出现在工具箱中。我想我在代码中遗漏了一些 VB.NET 不需要的东西,但我不知道它是什么。
这是 VB.NET 版本,它可以生成一个合适的 DLL,为我提供自定义工具。
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
这里是不工作的转换代码。它编译得很好,但不会像上面那样给我一个自定义控件。
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;
}
}
}
}
}
附带说明,如果有人想使用此代码,请继续。它使复选框使用三种状态并绘制一个 X。我将它用于两级身份验证系统。您甚至可以在代码中设置 X 的颜色或在控件中更改它。在 VB.NET 中运行良好,如果它得到修复,它将在 C# 中运行良好。我打算让它取一个值并设置 CheckState,但我首先遇到了这个问题。如果它得到修复,我会用 set 重新发布正确的代码。
我花了很长时间才得到正确的点放置,所以如果你愿意,可以使用它。
对于任何知道问题所在的人,请提供帮助。我不是一个好的销售人员。
修订工作守则;
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;
}
}
}
}
}
【问题讨论】:
-
你知道你可以在 C# 项目的 DLL 中使用 VB 代码,对吧?
-
我添加到的有问题的 DLL 在 C# 中。如果可以的话,我正在尝试将我的 DLL 计数减至 1。此外,我想到有一天学习 C++,这将帮助我更好地理解 C#->C++ 的工作原理。我也想学WPF,不过那是下次评论了。
-
修改后的代码不会处理它创建的任何东西。如果您使用
new并且对象具有 Dispose 方法,请使用using块 -
@Plutonix 我将如何重写它以完成处置?使用不适用于画笔。
-
从 SolidBrush 创建的画笔绝对实现了 Dispose,因此它可以使用
using块。请参阅:stackoverflow.com/a/35920074/1070452 您需要将创建它们的位置移动到实际使用它们的位置。无需为每个绘画调用创建 2 个画笔,然后只使用 1 个并且不处理任何画笔。 Another example
标签: c# vb.net dll visual-studio-2015