c# winform 子父窗体交互信息

第一种利用委托的方法：

    父窗体的方法：

     private void constraintEnd_Click(object sender, EventArgs e)        {            //if (MessageBox.Show("即将强制将本炉次数据归档！", "警告", MessageBoxButtons.OKCancel) == DialogResult.OK)//2012.4.11修改            //{            CCMEnd ccmend = new CCMEnd(curHeatInfo.Rows[0]["heatid"].ToString(), label337.Text.ToString().Trim());            ccmend.resultEvent += new CCMEnd.CalculateDelegate(Endccm);            ccmend.Show(this);        }        public void Endccm(string result)        {            checkProcStatus();            if (result.Equals("1"))            {                //MessageBox.Show("归档成功！", "警告");//2012.4.11修改                MessageBoxTimeout.Show("归档成功！", "警告", 4000);            }            else            {                //MessageBox.Show(result, "警告");                MessageBoxTimeout.Show(result, "警告", 4000);            }            //}        }

    子窗体方法：

 public delegate void  CalculateDelegate(string result);        public event CalculateDelegate resultEvent;        private void button1_Click(object sender, EventArgs e)        {            if (!string.IsNullOrEmpty(textBox4.Text) && !string.IsNullOrEmpty(textBox5.Text))            {                QT_Service.QT_Service qtService = new UI.QT_Service.QT_Service();                int cut_head = Int16.Parse(textBox4.Text);                int cut_trimmed = Int16.Parse(textBox5.Text);                result = qtService.EndEAFHeatID(4, string.Format("{0:yyyyMMddHHmmss}", DateTime.Now), cut_head, cut_trimmed);                //CalculateDelegate calculate = new CalculateDelegate(((CCMMonitor)this.Owner).Endccm);                //calculate(result);                this.Close();                resultEvent(result);            }            else            {                MessageBox.Show("输入有误，请重新输入！", "警告");            }        }

第二种方法：

父窗口：

 public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private void button1_Click(object sender, EventArgs e)        {            Form2 frm = new Form2(this,textBox1.Text);//带参数构造Form2(此方法该处带俩参数构造多余)                   if (frm.ShowDialog() == DialogResult.OK)            {                this.textBox1.Text += frm.ReturnText;//通过Form2的属性获得回传值            }            frm = null;                    }

子窗口：

   public partial class Form2 : Form    {        private Form1 pfrm;        private string frm1txt;        public Form2(Form1 parentfrm,string frm1text)        {            InitializeComponent();            pfrm = parentfrm;            frm1txt = frm1text;        }      public string ReturnText//回传值的属性        {            get { return this.frm1txt; }        }          private void button2_Click(object sender, EventArgs e)//给属性赋值并关闭模式窗体Form2        {            frm1txt = this.textBox2.Text;            this.DialogResult = DialogResult.OK;//*必加 模式窗体打开后 只有DialogResult初始化后才可继续操作 否则值无法传回            this.Close();//模式窗体关闭.close（）相当于将窗体隐藏 彻底关闭需要用.Dispose（）        }        private void button3_Click(object sender, EventArgs e)//关闭        {            this.DialogResult = DialogResult.Cancel;//同*            this.Close();        } 

第三种方法就是将父窗口的对象当做参数传到子窗口。

参考：http://www.cnblogs.com/wangchunming/archive/2011/12/10/2282962.html