无法创建组件 [英] Failed to create component

问题描述

我已经将我的VB.Net组件转换为C＃，但是有一个我看不到的转换错误......

这是代码......

使用System; 
使用System.Collections.Generic; 
使用System.Linq; 
使用System.Text; 
使用System.Drawing.Drawing2D; 
使用System.Windows.Forms;使用System.Drawing 
; 
 
命名空间OctoWords_cs 
 {
 public class slideOutPanel：Panel 
 {
 
 private Point [] polygon; 
 private int closedWidth; 
 private int captionHeight; 
 private int maxWidth = 300; 
 private string caption ="找到的字词"; 
 private bool closing = false; 
 
 private System.Timers.Timer tmr = new System.Timers.Timer（）; 
 
 public slideOutPanel（）
 {
 this.Dock = DockStyle.Right; 
 SizeF s = this.CreateGraphics（）。MeasureString（caption，this.Font）; 
 GraphicsPath gp = new GraphicsPath（）; 
 polygon = new Point [] 
 {
 new Point（0,0），
 new Point（300,0），
 new Point（300,495） ，
 new Point（（int）s.Height，495），
 new Point（（int）s.Height，（int）s.Width），
 new Point（0，（ int）s.Width），
 new Point（0,0）
}; 
 
 gp.AddPolygon（polygon）; 
 this.Region = new Region（gp）; 
 closedWidth =（int）s .Height; 
 captionHeight =（int）s.Width; 
 this.Width =（int）s.Height; 
 
 polygon [3] .X + = 1; 
 polygon [4] .X + = 1; 
 polygon [4] .Y  -  = 1; 
 polygon [5] .Y  -  = 1; 
 
 tmr.Interval = 100; 
 
} 
 
 private void slideOutPanel_Paint（object sender，System.Windows.Forms.PaintEventArgs e）
 {
 e.Graphics.DrawPolygon（Pens。黑色，多边形）; 
 e.Graphics.RotateTransform（270）; 
 e.Graphics.DrawString（标题，this.Font，Brushes.Black，（captionHeight * -1），0）; 
 e.Graphics.ResetTransform（）; 
} 
 
 protected override void OnMouseEnter（System.EventArgs e）
 {
 closing = false; 
 tmr.Enabled = true; 
 base.OnMouseEnter（e）; 
} 
 
 protected override void OnMouseLeave（System.EventArgs e）
 {
 Point p = this.PointToClient（Cursor.Position）; 
 if（！this.Region.IsVisible（p））
 {
 closing = true; 
 tmr.Enabled = true; 
 tmr.Start（）; 
} 
 
 base.OnMouseLeave（e）; 
} 
 
 public delegate void tmr_TickCallback（object sender，System.EventArgs e）; 
 
 private void tmr_Tick（object sender，System.EventArgs e）
 {
 if（this.InvokeRequired）
 {
 this.Invoke（new tmr_TickCallback） （new System.EventHandler（this.tmr_Tick）），sender，e）; 
} 
 else 
 {
 if（closing）
 {
 this.Width =（this.Width  -  Math.Min（50，（this。宽度 -  closedWidth）））; 
} 
其他
 {
 this.Width =（this.Width + Math.Min（50，（maxWidth  -  this.Width）））; 
} 
 
 tmr.Enabled =（（this.Width == closedWidth）||（this.Width == maxWidth））？ false：是的; 
} 
 
} 
} 
} 
 

谁能告诉我错误在哪里？

---

感谢您的帮助

解决方案

< blockquote>

您好，

此组件是否在VB.NET中使用Option Strict On？ 如果您有Option Strict Off然后转换为C＃，这可能是问题的根源，所以我将使用Option Strict On构建VB.NET版本以确保它仍然有效。

一般来说一个设计良好的组件在使用C＃到VB.NET或VB.NET到C＃从一种语言转到另一种语言时不应该抛出异常。

I've converted a VB.Net component of mine to C#, but there's a conversion error that i can't see...

This is the code...

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
using System.Drawing;

namespace OctoWords_cs
{
    public class slideOutPanel : Panel
    {

        private Point[] polygon;
        private int closedWidth;
        private int captionHeight;
        private int maxWidth = 300;
        private string caption = "Words found";
        private bool closing = false;

        private System.Timers.Timer tmr = new System.Timers.Timer();

        public slideOutPanel()
        {
            this.Dock = DockStyle.Right;
            SizeF s = this.CreateGraphics().MeasureString(caption, this.Font);
            GraphicsPath gp = new GraphicsPath();
            polygon = new Point[]
		    {
			    new Point(0, 0),
			    new Point(300, 0),
			    new Point(300, 495),
			    new Point((int)s.Height, 495),
			    new Point((int)s.Height, (int)s.Width),
			    new Point(0, (int)s.Width),
			    new Point(0, 0)
		    };

            gp.AddPolygon(polygon);
            this.Region = new Region(gp);
            closedWidth = (int)s.Height;
            captionHeight = (int)s.Width;
            this.Width = (int)s.Height;

            polygon[3].X += 1;
            polygon[4].X += 1;
            polygon[4].Y -= 1;
            polygon[5].Y -= 1;

            tmr.Interval = 100;

        }

        private void slideOutPanel_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
        {
            e.Graphics.DrawPolygon(Pens.Black, polygon);
            e.Graphics.RotateTransform(270);
            e.Graphics.DrawString(caption, this.Font, Brushes.Black, (captionHeight * -1), 0);
            e.Graphics.ResetTransform();
        }

        protected override void OnMouseEnter(System.EventArgs e)
        {
            closing = false;
            tmr.Enabled = true;
            base.OnMouseEnter(e);
        }

        protected override void OnMouseLeave(System.EventArgs e)
        {
            Point p = this.PointToClient(Cursor.Position);
            if (!this.Region.IsVisible(p))
            {
                closing = true;
                tmr.Enabled = true;
                tmr.Start();
            }

            base.OnMouseLeave(e);
        }

        public delegate void tmr_TickCallback(object sender, System.EventArgs e);

        private void tmr_Tick(object sender, System.EventArgs e)
        {
            if (this.InvokeRequired)
            {
                this.Invoke(new tmr_TickCallback(new System.EventHandler(this.tmr_Tick)), sender, e);
            }
            else
            {
                if (closing)
                {
                    this.Width = (this.Width - Math.Min(50, (this.Width - closedWidth)));
                }
                else
                {
                    this.Width = (this.Width + Math.Min(50, (maxWidth - this.Width)));
                }

                tmr.Enabled = ((this.Width == closedWidth) || (this.Width == maxWidth)) ? false : true;
            }

        }
    }
}

Can anyone tell me where the error is?

---

thanks for any help

解决方案

Hello,

Did this component work in VB.NET with Option Strict On ?  If you had Option Strict Off then converted to C# this might be the source of the problem so I would build the VB.NET version with Option Strict On to ensure it works still.

Generally speaking a well designed component should not throw an exception when going from one language to another with C# to VB.NET or VB.NET to C#.

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