?三．使用靜態(tài)類
??? 這個也是我們經(jīng)常要用到的一種數(shù)據(jù)交互方法。
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下面是定義的一個類：
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using System;
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using System.Collections;
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namespace ZZ
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{
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???? public class AppDatas
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???? {
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???????? private static ArrayList listData;
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???????? static AppDatas()
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???????? {
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????????????? listData = new ArrayList();
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????????????? listData.Add("DotNet");
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????????????? listData.Add("C#");
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????????????? listData.Add("Asp.net");
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????????????? listData.Add("WebService");
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????????????? listData.Add("XML");
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???????? }
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???????? public static ArrayList ListData
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???????? {
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????????????? get{return listData;}
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???????? }
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???????? public static ArrayList GetListData()
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???????? {
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????????????? return listData;
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???????? }
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???? }
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}
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上面包含了一個靜態(tài)類成員，listData,一個靜態(tài)構(gòu)造函數(shù)static AppDatas()，用來初始化listData的數(shù)據(jù)。還有一個靜態(tài)屬性ListData和一個靜態(tài)GetListData()方法，他們實現(xiàn)了同樣的功能就是返回listData。
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由于前面兩篇文章已經(jīng)講了很多，這里不細說了，下面是完整的代碼：
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Form1.cs文件
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using System;
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using System.Drawing;
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using System.Collections;
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using System.ComponentModel;
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using System.Windows.Forms;
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namespace ZZ
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{
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???? public class Form1 : System.Windows.Forms.Form
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???? {
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???????? private System.Windows.Forms.Button buttonEdit;
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???????? private System.Windows.Forms.ListBox listBoxFrm1;
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???????? private System.ComponentModel.Container components = null;
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???????? public Form1()
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???????? {
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????????????? InitializeComponent();
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????????????? this.listBoxFrm1.DataSource = AppDatas.ListData;
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?????????????
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???????? }
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???????? protected override void Dispose( bool disposing )
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???????? {
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????????????? if( disposing )
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?????????????????? if(components != null)
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?????????????????????? components.Dispose();
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?? ???????????base.Dispose( disposing );
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???????? }
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???????? [STAThread]
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???????? static void Main()
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???????? {
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????????????? Application.Run(new Form1());
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???????? }
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???????? private void InitializeComponent()
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???????? {
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????????????? this.buttonEdit = new System.Windows.Forms.Button();
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????????????? this.listBoxFrm1 = new System.Windows.Forms.ListBox();
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????????????? this.SuspendLayout();
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????????????? this.buttonEdit.Location = new System.Drawing.Point(128, 108);
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????????????? this.buttonEdit.Name = "buttonEdit";
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????????????? this.buttonEdit.TabIndex = 1;
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????????????? this.buttonEdit.Text = "修改";
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????????????? this.buttonEdit.Click += new System.EventHandler(this.buttonEdit_Click);
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????????????? this.listBoxFrm1.ItemHeight = 12;
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??????? ??????this.listBoxFrm1.Location = new System.Drawing.Point(12, 8);
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????????????? this.listBoxFrm1.Name = "listBoxFrm1";
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????????????? this.listBoxFrm1.Size = new System.Drawing.Size(108, 124);
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????????????? this.listBoxFrm1.TabIndex = 2;
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????????????? this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
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????????????? this.ClientSize = new System.Drawing.Size(208, 141);
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????????????? this.Controls.Add(this.listBoxFrm1);
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????????????? this.Controls.Add(this.buttonEdit);
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????????????? this.Name = "Form1";
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????????????? this.Text = "Form1";
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????????????? this.ResumeLayout(false);
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???????? }
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???????? private void buttonEdit_Click(object sender, System.EventArgs e)
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???????? {
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????????????? Form2 formChild = new Form2();
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????????????? formChild.ShowDialog();
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????????????? this.listBoxFrm1.DataSource = null;
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????????????? this.listBoxFrm1.DataSource = AppDatas.ListData;
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???????? }
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???? }
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}
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Form2.cs文件
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using System.Drawing;
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using System.Collections;
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using System.ComponentModel;
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using System.Windows.Forms;
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namespace ZZ
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{
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???? public class Form2 : System.Windows.Forms.Form
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???? {
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???????? private System.Windows.Forms.Button buttonOK;
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???????? private System.ComponentModel.Container components = null;
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???????? private System.Windows.Forms.ListBox listBoxFrm2;
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???????? private System.Windows.Forms.Button buttonAdd;
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???????? private System.Windows.Forms.Button buttonDel;
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???????? private System.Windows.Forms.TextBox textBoxAdd;
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???????? public Form2()
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???????? {
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????????????? InitializeComponent();
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????????????? foreach(object o in AppDatas.ListData)
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?????????????????? this.listBoxFrm2.Items.Add(o);
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???????? }
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???????? protected override void Dispose( bool disposing )
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???????? {
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????????????? if( disposing )
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?????????????????? if(components != null)
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?????????????????????? components.Dispose();
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????????????? base.Dispose( disposing );
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???????? }
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???????? private void InitializeComponent()
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???????? {
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????????????? this.buttonOK = new System.Windows.Forms.Button();
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????????? ????this.listBoxFrm2 = new System.Windows.Forms.ListBox();
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????????????? this.buttonAdd = new System.Windows.Forms.Button();
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????????????? this.buttonDel = new System.Windows.Forms.Button();
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????????????? this.textBoxAdd = new System.Windows.Forms.TextBox();
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????????????? this.SuspendLayout();
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????????????? this.buttonOK.Location = new System.Drawing.Point(188, 108);
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????????????? this.buttonOK.Name = "buttonOK";
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????????????? this.buttonOK.TabIndex = 0;
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????????????? this.buttonOK.Text = "確定";
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?? ???????????this.buttonOK.Click += new System.EventHandler(this.buttonOK_Click);
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????????????? this.listBoxFrm2.ItemHeight = 12;
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????????????? this.listBoxFrm2.Location = new System.Drawing.Point(8, 8);
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????????????? this.listBoxFrm2.Name = "listBoxFrm2";
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????????????? this.listBoxFrm2.Size = new System.Drawing.Size(168, 124);
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????????????? this.listBoxFrm2.TabIndex = 2;
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????????????? this.buttonAdd.Location = new System.Drawing.Point(188, 44);
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????????????? this.buttonAdd.Name = "buttonAdd";
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?????? ???????this.buttonAdd.TabIndex = 3;
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????????????? this.buttonAdd.Text = "增加";
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????????????? this.buttonAdd.Click += new System.EventHandler(this.buttonAdd_Click);
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????????????? this.buttonDel.Location = new System.Drawing.Point(188, 76);
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????????????? this.buttonDel.Name = "buttonDel";
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????????????? this.buttonDel.TabIndex = 4;
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????????????? this.buttonDel.Text = "刪除";
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????????????? this.buttonDel.Click += new System.EventHandler(this.buttonDel_Click);
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????????????? this.textBoxAdd.Location = new System.Drawing.Point(188, 12);
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????????????? this.textBoxAdd.Name = "textBoxAdd";
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????????????? this.textBoxAdd.Size = new System.Drawing.Size(76, 21);
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????????????? this.textBoxAdd.TabIndex = 5;
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????????????? this.textBoxAdd.Text = "";
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????????????? this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
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????????????? this.ClientSize = new System.Drawing.Size(272, 141);
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????????????? this.Controls.Add(this.textBoxAdd);
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????????????? this.Controls.Add(this.buttonDel);
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????????????? this.Controls.Add(this.buttonAdd);
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????????????? this.Controls.Add(this.listBoxFrm2);
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????????????? this.Controls.Add(this.buttonOK);
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????????????? this.Name = "Form2";
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????????????? this.Text = "Form2";
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????????????? this.ResumeLayout(false);
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???????? }
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???????? private void buttonOK_Click(object sender, System.EventArgs e)
???????? {
????????????? this.Close();
???????? }
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???????? private void buttonAdd_Click(object sender, System.EventArgs e)
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???????? {
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????????????? if(this.textBoxAdd.Text.Trim().Length>0)
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? ????????????{
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?????????????????? AppDatas.ListData.Add(this.textBoxAdd.Text.Trim());
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?????????????????? this.listBoxFrm2.Items.Add(this.textBoxAdd.Text.Trim());
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????????????? }
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????????????? else
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?????????????????? MessageBox.Show("請輸入添加的內(nèi)容!");
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???? ?????????
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???????? }
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???????? private void buttonDel_Click(object sender, System.EventArgs e)
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???????? {
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????????????? int index = this.listBoxFrm2.SelectedIndex;
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????????????? if(index!=-1)
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????????????? {
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??????????????????? AppDatas.ListData.RemoveAt(index);
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?????????????????? this.listBoxFrm2.Items.RemoveAt(index);
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????????????? }
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????????????? else
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?????????????????? MessageBox.Show("請選擇刪除項!");
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???????? }
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???? }
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}???
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??? 總結(jié)，我認為使用靜態(tài)類比較多的地方就是把應(yīng)用程序的配置文件裝載到一個靜態(tài)類里面，讓所有的窗體和其他實例都可以通過靜態(tài)屬性以及靜態(tài)方法使用這些數(shù)據(jù)，比如三層結(jié)構(gòu)或多層結(jié)構(gòu)都可以訪問它，而不是在多個實例間傳來傳去。在這里我們討論的是Windows窗體，其實在兩個不同的實例間交互數(shù)據(jù)，都可以采用三篇文章中的方案實現(xiàn)，除非是這個類特有的屬性或著方法。現(xiàn)在都講完了，雖然不是什么高深的東西，但是希望能對一些初學者有所幫助，同時也歡迎各位朋友進行技術(shù)交流，共同提高。
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文章標題：窗口間的數(shù)據(jù)傳遞（三）
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