在第一篇和第二篇文章中我们使用带参数的构造函数、属性以及方法实现了数据的交互，接下来要讲的是使用静态类来完成窗体间的数据交互。这个也是我们经常要用到的一种数据交互方法。
三．使用静态类
下面是定义的一个类：
using System;
using System.Collections;
namespace ZZ
{
public class AppDatas
{
private static ArrayList listData;
static AppDatas()
{
listData = new ArrayList();
listData.Add("DotNet");
listData.Add("C#");
listData.Add("Asp.Net");
listData.Add("WebService");
listData.Add("XML");
}
public static ArrayList ListData
{
get{return listData;}
}
public static ArrayList GetListData()
{
return listData;
}
}
}
上面包含了一个静态类成员，listData,一个静态构造函数static AppDatas()，用来初始化listData的数据。还有一个静态属性ListData和一个静态GetListData()方法，他们实现了同样的功能就是返回listData。
由于前面两篇文章已经讲了很多，这里不细说了，下面是完整的代码：
Form1.cs文件
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
namespace ZZ
{
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button buttonEdit;
private System.Windows.Forms.ListBox listBoxFrm1;
private System.ComponentModel.Container components = null;
public Form1()
{
InitializeComponent();
this.listBoxFrm1.DataSource = AppDatas.ListData;
}
protected override void Dispose( bool disposing )
{
if( disposing )
if(components != null)
components.Dispose();
base.Dispose( disposing );
}
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void InitializeComponent()
{
this.buttonEdit = new System.Windows.Forms.Button();
this.listBoxFrm1 = new System.Windows.Forms.ListBox();
this.SuspendLayout();
this.buttonEdit.Location = new System.Drawing.Point(128, 108);
this.buttonEdit.Name = "buttonEdit";
this.buttonEdit.TabIndex = 1;
this.buttonEdit.Text = "修改";
this.buttonEdit.Click += new System.EventHandler(this.buttonEdit_Click);
this.listBoxFrm1.ItemHeight = 12;
this.listBoxFrm1.Location = new System.Drawing.Point(12, 8);
this.listBoxFrm1.Name = "listBoxFrm1";
this.listBoxFrm1.Size = new System.Drawing.Size(108, 124);
this.listBoxFrm1.TabIndex = 2;
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(208, 141);
this.Controls.Add(this.listBoxFrm1);
this.Controls.Add(this.buttonEdit);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
private void buttonEdit_Click(object sender, System.EventArgs e)
{
Form2 formChild = new Form2();
formChild.ShowDialog();
this.listBoxFrm1.DataSource = null;
this.listBoxFrm1.DataSource = AppDatas.ListData;
}
}
}
Form2.cs文件
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
namespace ZZ
{
public class Form2 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button buttonOK;
private System.ComponentModel.Container components = null;
private System.Windows.Forms.ListBox listBoxFrm2;
private System.Windows.Forms.Button buttonAdd;
private System.Windows.Forms.Button buttonDel;
private System.Windows.Forms.TextBox textBoxAdd;
public Form2()
{
InitializeComponent();
foreach(object o in AppDatas.ListData)
this.listBoxFrm2.Items.Add(o);
}
protected override void Dispose( bool disposing )
{
if( disposing )
if(components != null)
components.Dispose();
base.Dispose( disposing );
}
private void InitializeComponent()
{
this.buttonOK = new System.Windows.Forms.Button();
this.listBoxFrm2 = new System.Windows.Forms.ListBox();
this.buttonAdd = new System.Windows.Forms.Button();
this.buttonDel = new System.Windows.Forms.Button();
this.textBoxAdd = new System.Windows.Forms.TextBox();
this.SuspendLayout();
this.buttonOK.Location = new System.Drawing.Point(188, 108);
this.buttonOK.Name = "buttonOK";
this.buttonOK.TabIndex = 0;
this.buttonOK.Text = "确定";
this.buttonOK.Click += new System.EventHandler(this.buttonOK_Click);
this.listBoxFrm2.ItemHeight = 12;
this.listBoxFrm2.Location = new System.Drawing.Point(8, 8);
this.listBoxFrm2.Name = "listBoxFrm2";
this.listBoxFrm2.Size = new System.Drawing.Size(168, 124);
this.listBoxFrm2.TabIndex = 2;
this.buttonAdd.Location = new System.Drawing.Point(188, 44);
this.buttonAdd.Name = "buttonAdd";
this.buttonAdd.TabIndex = 3;
this.buttonAdd.Text = "增加";
this.buttonAdd.Click += new System.EventHandler(this.buttonAdd_Click);
this.buttonDel.Location = new System.Drawing.Point(188, 76);
this.buttonDel.Name = "buttonDel";
this.buttonDel.TabIndex = 4;
this.buttonDel.Text = "删除";
this.buttonDel.Click += new System.EventHandler(this.buttonDel_Click);
this.textBoxAdd.Location = new System.Drawing.Point(188, 12);
this.textBoxAdd.Name = "textBoxAdd";
this.textBoxAdd.Size = new System.Drawing.Size(76, 21);
this.textBoxAdd.TabIndex = 5;
this.textBoxAdd.Text = "";
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(272, 141);
this.Controls.Add(this.textBoxAdd);
this.Controls.Add(this.buttonDel);
this.Controls.Add(this.buttonAdd);
this.Controls.Add(this.listBoxFrm2);
this.Controls.Add(this.buttonOK);
this.Name = "Form2";
this.Text = "Form2";
this.ResumeLayout(false);
}
private void buttonOK_Click(object sender, System.EventArgs e)
{
this.Close();
}
private void buttonAdd_Click(object sender, System.EventArgs e)
{
if(this.textBoxAdd.Text.Trim().Length>0)
{
AppDatas.ListData.Add(this.textBoxAdd.Text.Trim());
this.listBoxFrm2.Items.Add(this.textBoxAdd.Text.Trim());
}
else
MessageBox.Show("请输入添加的内容!");
}
private void buttonDel_Click(object sender, System.EventArgs e)
{
int index = this.listBoxFrm2.SelectedIndex;
if(index!=-1)
{
AppDatas.ListData.RemoveAt(index);
this.listBoxFrm2.Items.RemoveAt(index);
}
else
MessageBox.Show("请选择删除项!");
}
}
}
总结，
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