C#.Net组件开发(高级篇) - 设计时在窗体设计器文件内生成组件的代码

C# Code:

private void InitializeComponent()
{
   this.button1 = new System.Windows.Forms.Button();
   this.SuspendLayout();
   //
   // button1
   //
   this.button1.Location = new System.Drawing.Point(87, 75);
   this.button1.Name = "button1";
   this.button1.Size = new System.Drawing.Size(75, 23);
   this.button1.TabIndex = 0;
   this.button1.Text = "button1";
   this.button1.UseVisualStyleBackColor = true;
   //
   // frmTester
   //
   this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
   this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
   this.ClientSize = new System.Drawing.Size(292, 266);
   this.Controls.Add(this.button1);
   this.Name = "frmTester";
   this.Text = "frmTester";
   this.ResumeLayout(false);
   
}

C# Code:

public class Control : Component, IDropTarget, ISynchronizeInvoke, IWin32Window, IBindableComponent, IComponent, IDisposable
{
...略...

// Summary:
// Adds the specified control to the control collection.
//
// Parameters:
// value:
// The System.Windows.Forms.Control to add to the control collection.
//
// Exceptions:
// System.Exception:
// The specified control is a top-level control, or a circular control reference
// would result if this control were added to the control collection.
//
// System.ArgumentException:
// The object assigned to the value parameter is not a System.Windows.Forms.Control.

public virtual void Add(Control value);

...略...

}

C# Code:

[ToolboxBitmap(typeof(CSFrameworkComponent), "ComponentTest.bmp")]
[DesignTimeVisible(true)]
[Designer(typeof(CSFrameworkDesigner), typeof(IDesigner))]
public partial class CSFrameworkComponent : Component
{
   //窗体设计器的接口引用，当拖拉组件到窗体上，值由构造器传入．
   private IContainer _Designer;
   
   public CSFrameworkComponent()
   {
      
   }
   
   public CSFrameworkComponent(IContainer container)
   {
      _Designer = container;
      container.Add(this);
   }
}

//来源:C/S框架网(www.csframework.com) QQ:1980854898

C# Code:

public class CSFrameworkComponentDesigner : ComponentDesigner
{
   private CSFrameworkComponent _CurrentComponent;
   
   public CSFrameworkComponentDesigner()
   : base()
   {
      // 添加菜单到右键菜单和智能标记中。
      DesignerVerb V1 = new DesignerVerb("生成MyNodeComponent的设计时代码", new EventHandler(OnGenerateMyNodeComponentCode));
      DesignerVerb V2 = new DesignerVerb("生成Button的设计时代码", new EventHandler(OnGenerateButtonCode));
      DesignerVerb V3 = new DesignerVerb("www.CSFramework.com C/S框架网", new EventHandler(OnAbout));
      
      this.Verbs.Add(V1);
      this.Verbs.Add(V2);
      this.Verbs.Add(V3);
   }
   
   private void OnAbout(object sender, EventArgs e)
   {
      MessageBox.Show("程序：Jonny Sun \r\n版权：www.CSFramework.com C/S框架网");
   }
   
   private void OnGenerateMyNodeComponentCode(object sender, EventArgs e)
   {
      //
      //在窗体设计器代码中生成自定义MyNodeComponent组件的代码
      //
      //取出窗体设计器
      IDesignerHost host = (IDesignerHost)this.Component.Site.GetService(typeof(IDesignerHost));
      
      //创建一个组件
      MyNodeComponent node = (MyNodeComponent)host.CreateComponent(typeof(MyNodeComponent));
      node.NodeName = "www.CSFramework.com";
      node.ID = DateTime.Now.Millisecond;
      host.Container.Add(node);//在窗体设计器代码中生成代码
      
      MessageBox.Show("已生成" node.NodeName "的代码！请打开frmTester.Designer.cs文件查看．");
   }
   
   public override void Initialize(IComponent component)
   {
      base.Initialize(component);
      
      _CurrentComponent = (CSFrameworkComponent)component;
   }
   
   private void OnGenerateButtonCode(object sender, EventArgs e)
   {
      //
      //在窗体上加入一个Button组件,host.RootComponent=Form
      //
      //取出窗体设计器
      IDesignerHost host = (IDesignerHost)this.GetService(typeof(IDesignerHost));
      IComponentChangeService c = (IComponentChangeService)this.GetService(typeof(IComponentChangeService));
      
      Form form = (Form)host.RootComponent;//RootComponent: 根组件，指Form
      DesignerTransaction tran = host.CreateTransaction();//创建事务
      
      //创建按钮组件
      Button button = (Button)host.CreateComponent(typeof(Button));
      button.Text = "www.CSFramework.com";
      button.Location = new Point(50, 50);
      button.Size = new Size(150, 30);
      
      c.OnComponentChanging(form, null);//通知窗体正在新增控件服务
      form.Controls.Add(button);//Form.Controls.Add, 生成持久化代码
      c.OnComponentChanged(form, null, null, null);//通知窗体修改服务已完成
      
      tran.Commit();//提交事务
      
      MessageBox.Show("已生成" button.Name "的代码！请打开frmTester.Designer.cs文件查看．");
   }
      
}

//来源:C/S框架网(www.csframework.com) QQ:1980854898