c# 对话框交换数据

 本例是一个管理联系人信息的小程序，程序有两个窗体，一个主窗体，在listview控件中显示联系人信息列表，一个对话框窗体，用来显示和修改 某个联系人的信息。通过主窗体的菜单命令，可以打开对话框，并把主窗体listview中的当前选中的联系人数据传递给对话框，在对话框中可以对联系人信 息进行修改，修改完毕后，单击确定按钮，主窗体根据用户在对话框中的输入更新listview空间

1.创建一个windows应用程序

2.在项目中添加联系人类。如下

 public class conntactpeople
   {
       private String _name;

       public String name
       {
           get { return _name; }
           set { _name = value; }
       }
       private bool _isFemale=false;

       public  bool isFemale
       {
           get { return _isFemale; }
           set { _isFemale = value; }
       }
       private DateTime _dateOfBirth;

public DateTime dateOfBirth
{
    get { return _dateOfBirth;}
    set { _dateOfBirth = value;}
}
   private String _company;

   public String company
   {
       get { return _company; }
       set { _company = value; }
   }
   private String _telephone;

   public String telephone
   {
       get { return _telephone; }
       set { _telephone = value; }
   }

3.添加一个窗体对话框

4.在contactDialog窗体的load时间中，对窗体进行初始化。代码如下

button1.DialogResult = DialogResult.OK;
button2.DialogResult = DialogResult.Cancel;

5.在contactDialog类中，添加一个Contact类型的属性，用来与外界交换数据。代码如下：

private conntactpeople _contact;

 public conntactpeople contact
 {
     get
     {
         conntactpeople c = new conntactpeople();
         c.name = textBox1.Text;
         c.company = textBox2.Text;
         c.dateOfBirth = dateTimePicker1.Value;
         c.telephone = maskedTextBox2.Text;
         c.isFemale = radioButton2.Checked;
         return c;

     }
     set
     {
         textBox1.Text = value.name;
         radioButton2.Checked = value.isFemale;
         radioButton1.Checked = !value.isFemale;
         dateTimePicker1.Value = value.dateOfBirth;
         textBox2.Text = value.company;
         maskedTextBox2.Text = value.telephone;
     }
 }

6.在主船体中添加listview空间，以及ContextMenustrip空间，添加菜单项：添加，删除，修改。并把listview的ContextMenuStrip设置为此菜单。此时，主窗体就可以用Contact类了。

7.在主窗体的load事件添加代码：

 listView1.View = View.Details;
 listView1.GridLines=true;
 listView1.Columns.Add("姓名", 80);
 //listView1.co
 listView1.Columns.Add("性别", 40);
 listView1.Columns.Add("出生日期", 100);
 listView1.Columns.Add("工作单位",160);
 listView1.Columns.Add("联系电话", 100);
 listView1.HideSelection = true;
 listView1.FullRowSelect = true;
ContactDialog dialog = new ContactDialog();
dialog.Owner = this;

8.主窗体中的添加，删除，更新按钮中添加相应代码即可

private void 添加ToolStripMenuItem_Click(object sender, EventArgs e)
{
   ContactDialog dialog = new ContactDialog();
  //  dialog.contact = null;
    if (dialog.ShowDialog()==DialogResult.OK)
    {
        addContact(dialog.contact);

    }
}
//添加函数
private void addContact(conntactpeople c)
{
    ListViewItem item = listView1.Items.Add(c.name);

    updateContact(item, c);
}

//更新函数
private void updateContact(ListViewItem item,conntactpeople c)
{
    item.SubItems.Clear();
    //item.SubItems.c
    item.Text = c.name;
    if (c.isFemale)
    {
        item.SubItems.Add("女");

    }
    else
    {
        item.SubItems.Add("男");
    }
    item.SubItems.Add(c.dateOfBirth.ToString("yyyy-MM-dd"));
    item.SubItems.Add(c.company);
    item.SubItems.Add(c.telephone);
}

private void 删除ToolStripMenuItem_Click(object sender, EventArgs e)
{
    if (listView1.SelectedIndices.Count>0)
    {



        if (MessageBox.Show("ni"+listView1.Items[listView1.SelectedIndices[0]].Text+"ma?","dd",MessageBoxButtons.YesNoCancel)==DialogResult.Yes)
        {
            listView1.Items.RemoveAt(listView1.SelectedIndices[0]);
          //  listView1.Items.RemoveAt(listView1.SelectedIndices[])
        }
    }
}



private void 修改ToolStripMenuItem_Click(object sender, EventArgs e)
{
    if (listView1.SelectedIndices.Count==0)
    {
        MessageBox.Show("请选择要修改的人");
        return;

    }
    conntactpeople c = new conntactpeople();
    ListViewItem item = listView1.SelectedItems[0];
    c.name = item.Text;
    //item.SubItems[];
    c.isFemale=(item.SubItems[1].Text=="女");
    try
    {
        c.dateOfBirth = DateTime.Parse(item.SubItems[2].Text.ToString());
    }
    catch
    {
        System.Diagnostics.Trace.Write(c.dateOfBirth);
        MessageBox.Show(item.SubItems[2].Text);

        //System.Diagnostics.Trace(item.SubItems[1].Text);
    }

    c.company = item.SubItems[3].Text;
    c.telephone = item.SubItems[4].Text;
    ContactDialog dialog = new ContactDialog();
    dialog.contact = c;

    if (dialog.ShowDialog()==DialogResult.OK)
    {
        updateContact(item, dialog.contact);
    }
}

这样就可以达到c#中对话框中相互交换数据了