Visual C# 打造網路電腦樹狀圖（三）：元件初始化與介面佈局

手寫 InitializeComponent：掌控每一個元件細節

雖然 Visual Studio 設計器能自動產生程式碼，但手寫 InitializeComponent 能讓開發者更清楚掌握元件屬性與事件繫結。以下為完整初始化邏輯：

完整初始化程式碼

private void InitializeComponent()
{
    this.treeView1 = new System.Windows.Forms.TreeView();
    this.button1 = new System.Windows.Forms.Button();
    this.SuspendLayout();

    // TreeView 設定
    this.treeView1.ImageIndex = -1;
    this.treeView1.Location = new System.Drawing.Point(16, 8);
    this.treeView1.Name = "treeView1";
    this.treeView1.SelectedImageIndex = -1;
    this.treeView1.Size = new System.Drawing.Size(316, 302);
    this.treeView1.TabIndex = 0;
    this.treeView1.DoubleClick += new System.EventHandler(this.treeView1_DoubleClick);

    // Button 設定
    this.button1.Location = new System.Drawing.Point(118, 324);
    this.button1.Name = "button1";
    this.button1.Size = new System.Drawing.Size(82, 34);
    this.button1.TabIndex = 1;
    this.button1.Text = "獲取";
    this.button1.Click += new System.EventHandler(this.button1_Click);

    // Form 設定
    this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
    this.ClientSize = new System.Drawing.Size(350, 369);
    this.Controls.Add(this.button1);
    this.Controls.Add(this.treeView1);
    this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
    this.MaximizeBox = false;
    this.Name = "Form1";
    this.Text = "Visual C#構建網絡計算機樹形圖";
    this.ResumeLayout(false);
}

設計介面預覽

完成上述初始化後，表單設計畫面如下：

圖 01：Visual C# 構建網路電腦樹狀圖 - 設計介面

按鈕點擊事件：載入第一層網域/工作群組

使用者點擊「獲取」按鈕時，程式會遍歷 entryPC.Children 並將每個子項（網域或工作群組）加入 TreeView：

private void button1_Click(object sender, EventArgs e)
{
    foreach (DirectoryEntry child in entryPC.Children)
    {
        TreeNode node = new TreeNode(child.Name);
        treeView1.Nodes.Add(node);
    }
}

此時樹狀圖已呈現第一層結構，雙擊節點將觸發前文的 treeView1_DoubleClick 進入第二層電腦查詢。