关于TypeDescriptor反射取得对象属性的例外，是.net 2.0的bug吗？

    一直想试一下.net反射的强大功能，也一直有看别人的例子，但今天想自己亲自试一下，结果发现了问题。
下面的代码在VS2003里执行就没任何问题。在vs2005（Development Edition）里编译也没问题，但执行时出现了下面的错误：Object does not match target type
出错行在调用      Result = myProperty.GetValue(ctr)时出现


不知是.net 2.0的bug还是我的问题。
    代码如下：

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

using System.Reflection;

namespace WindowsApplication2
{
    /**//// <summary>
    /// Form1 的摘要说明。
    /// </summary>
    public class Form1 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.TextBox textBox1;
        private System.Windows.Forms.TextBox textBox2;
        private System.Windows.Forms.Button button1;
        /**//// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.Container components = null;

        public Form1()
        {
            //
            // Windows 窗体设计器支持所必需的
            //
            InitializeComponent();

            //
            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
            //
        }

        /**//// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        Windows 窗体设计器生成的代码#region Windows 窗体设计器生成的代码
        /**//// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.label1 = new System.Windows.Forms.Label();
            this.label2 = new System.Windows.Forms.Label();
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.textBox2 = new System.Windows.Forms.TextBox();
            this.button1 = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // label1
            // 
            this.label1.Location = new System.Drawing.Point(74, 12);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(104, 16);
            this.label1.TabIndex = 0;
            this.label1.Text = "label1";
            // 
            // label2
            // 
            this.label2.Location = new System.Drawing.Point(74, 51);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(100, 23);
            this.label2.TabIndex = 1;
            this.label2.Text = "label2";
            // 
            // textBox1
            // 
            this.textBox1.Location = new System.Drawing.Point(76, 93);
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(100, 21);
            this.textBox1.TabIndex = 2;
            this.textBox1.Text = "textBox1";
            // 
            // textBox2
            // 
            this.textBox2.Location = new System.Drawing.Point(76, 137);
            this.textBox2.Name = "textBox2";
            this.textBox2.Size = new System.Drawing.Size(100, 21);
            this.textBox2.TabIndex = 3;
            this.textBox2.Text = "textBox2";
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(76, 194);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(75, 23);
            this.button1.TabIndex = 4;
            this.button1.Text = "button1";
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(239, 278);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.textBox2);
            this.Controls.Add(this.textBox1);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.label1);
            this.Name = "Form1";
            this.Text = "Form1";
            this.ResumeLayout(false);
            this.PerformLayout();

        }
        #endregion

        /**//// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }


        private void button1_Click(object sender, EventArgs e)
        {
            for(int i = 1 ;i<= 2;i++)
            {

                this.SetValueControlProperty(this, "label" + i.ToString(), "Text",(string)GetValueControlProperty(this, "textBox" + i.ToString(), "Text"));
            }
        }

        public object GetValueControlProperty(object ClassInstance,string ControlName,string PropertyName)
        {
            object Result=null;
            Type myType = ClassInstance.GetType();
            FieldInfo myFieldInfo = myType.GetField( ControlName,
                BindingFlags.NonPublic | BindingFlags.Instance  |
                BindingFlags.Public    | BindingFlags.Instance);
            if(myFieldInfo != null)
            {
                PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(myType);
                PropertyDescriptor myProperty = properties.Find(PropertyName, true);

                if(myProperty != null)
                {
                    object ctr;

                    ctr = myFieldInfo.GetValue(ClassInstance);

                    try
                    {
                        Result = myProperty.GetValue(ctr);
                    }
                    catch(Exception ex)
                    {
                        MessageBox.Show(ex.Message,"Error");
                    }
                }
            }
            return Result;
        }
    
        //
        public object SetValueControlProperty(object ClassInstance ,string ControlName,string PropertyName,object Value)
        {

            object Result=null;

            Type myType = ClassInstance.GetType();

            FieldInfo myFieldInfo = myType.GetField(ControlName, 
                BindingFlags.NonPublic | BindingFlags.Instance | 
                BindingFlags.Public | BindingFlags.Instance); 
            if(myFieldInfo != null)
            {
                PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(myType);
                PropertyDescriptor myProperty = properties.Find(PropertyName, false);
                if(myProperty != null)
                {
                    object ctr;
                    ctr = myFieldInfo.GetValue(ClassInstance); 
                    try
                    {
                        myProperty.SetValue(ctr, Value);
                        Result = ctr;
                    }
                    catch(Exception ex)
                    {
                        MessageBox.Show(ex.Message,"错误");
                    }
                }
            }
            return Result;
        }
    }
}

哈哈，我还没找到原因，先记下来给大家看看！

转载于:https://www.cnblogs.com/RockyWang/archive/2005/12/06/291507.html