学步园

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Reflection;
namespace puhlish
{
   /// <summary> 
   /// 测试窗体 
   /// </summary> 
   public partial class frmTest : Form
   {
      public frmTest()
      {
         InitializeComponent();
      }    
      private void button1_Click(object sender, EventArgs e)
      {
         //不直接创建 
         // frmReflactForm form = new frmReflactForm(); 
         //为了演示，通过反射创建一个窗体 
         object o = typeof(frmReflactForm).Assembly.CreateInstance("puhlish.frmReflactForm");
         frmReflactForm form = o as frmReflactForm;
         form.Show();
      }
      private void button2_Click(object sender, EventArgs e)
      {
         //在Assembly内通过Application查找frmReflactForm 
         Form findform = GetReflactForm("frmReflactForm");
         if (findform != null)
             SetFormValue(findform, "textBox2", textBox1.Text);
      }
      private void SetFormValue(Form form, string controlName, object value)
      {
         FieldInfo[] fs = form.GetType().GetFields(BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Public);
         foreach (FieldInfo fi in fs)
         {
            if (fi.Name.ToUpper() == controlName.ToUpper())
            {
               Control[] ctls = form.Controls.Find(controlName, true);
               if (ctls.Length > 0)
               {
                  ctls[0].Text = Convert.ToString(value); //直接赋值 
                  //如想搞得高级点，通过反射赋值.xxx.setvalue(obj,value) 
               }
               break;
            }
         }
      }
      //从Application查找窗体 
      private Form GetReflactForm(string formName)
      {
         foreach (Form form in Application.OpenForms)
         {
            if (form.GetType().Name.ToUpper() == formName.ToUpper())
            {
               return form;
            }
         }
         return null;
      }
   }
}