ToolStripPanel联接方法没有将工具条添加到面板

Question

我在ToolStripPanel.Join上遇到了一个很奇怪的问题，我一直在谷歌上搜索，所以我想知道我做错了什么，但我搞不懂。基本上，当我使用ToolStripPanel.Join时，我添加的第一个ToolStrip根本不会出现在ToolStripPanel中，但是我加入的所有其他ToolStrips都会出现。在深入讨论细节之前，首先让我说一下，我使用的是C#和VS 2010以及.NET 4，只是在某些上下文中，我尝试在用户控件上使用ToolStripPanel，该控件位于我们创建的自定义dll中，这样我们就可以在其他形式中重用这些用户控件。

我以前使用过ToolStripContainer，但我决定使用ToolStripPanel，因为我们只需要ToolStripContainer的顶部面板；我不认为使用ToolStripContainer有什么意义。由于无法在工具箱中找到ToolStripPanel控件，所以我决定自己将其添加到Designer.cs文件中。我就是这样做的：

private ToolStripPanel tsPanel;
<--Other code here-->
private void InitializeComponent()
{
    this.tsPanel = new System.Windows.Forms.ToolStripPanel();
    <--Other code here-->
    // 
    // tsPanel
    // 
    this.tsPanel.Dock = System.Windows.Forms.DockStyle.Top;
    this.tsPanel.Location = new System.Drawing.Point(0, 0);
    this.tsPanel.Margin = new System.Windows.Forms.Padding(3);
    this.tsPanel.Name = "tsPanel";
    this.tsPanel.Orientation = System.Windows.Forms.Orientation.Horizontal;
    this.tsPanel.RowMargin = new System.Windows.Forms.Padding(3, 0, 0, 0);
    this.tsPanel.Size = new System.Drawing.Size(1000, 0);
    <--Other code here-->
    // 
    // MFDesigner
    // 
    this.BackColor = System.Drawing.Color.Gainsboro;
    <--Add other controls to UC Controls collection-->
    this.Controls.Add(this.tsPanel);
    this.ForeColor = System.Drawing.Color.Black;
    this.Name = "MFDesigner";
    this.Size = new System.Drawing.Size(1000, 670);
    this.Load += new System.EventHandler(this.MultiFormatDesignerControl_Load);
    this.Resize += new System.EventHandler(this.MFDesigner_Resize);
    this.pnlToolbox.ResumeLayout(false);
    this.pnlProperties.ResumeLayout(false);
    this.ResumeLayout(false);
    this.PerformLayout();
}

然后，在用户控件的构造函数中，我有：

public MFDesigner()
{
    InitializeComponent();
    <--Other code here-->
    ToolStripButton[] openSaveButtonArr = new ToolStripButton[]{
        //The createToolStripButton method creates toolstrip buttons using some simple
        //parameters.
        createToolStripButton("Open", Images.CmdOpen, new EventHandler(this.OnOpen), "Open saved file"),
        createToolStripButton("Save", Images.CmdSave, new EventHandler(this.OnSaveToDisk), "Save to disk")
    };
    ToolStrip openSaveToolStrip = new ToolStrip(openSaveButtonArr);
    tspanel.Join(openSaveToolStrip);
    <--Other code here-->
}

由于我们正在创建工具条并将它们添加到代码中的toolstrippanel中，所以我无法看到它在用户控件的设计器中的样子。因此，我构建了dll，然后在一个单独的项目中转到另一个表单，它从dll中消耗用户控件，当表单打开时，没有工具条；它根本不出现。不过，奇怪的是。如果我只向面板再添加一个工具条，那么将出现第二个工具条：

public MFDesigner()
{
    InitializeComponent();
    <--Other code here-->
    ToolStripButton[] openSaveButtonArr = new ToolStripButton[]{
        //The createToolStripButton method creates toolstrip buttons using some simple
        //parameters.
        createToolStripButton("Open", Images.CmdOpen, new EventHandler(this.OnOpen), "Open saved file"),
        createToolStripButton("Save", Images.CmdSave, new EventHandler(this.OnSaveToDisk), "Save to disk")
    };
    ToolStrip openSaveToolStrip = new ToolStrip(openSaveButtonArr);
    tspanel.Join(openSaveToolStrip, 1);
    ToolStripButton[] openSaveButtonArr2 = new ToolStripButton[]{
        createToolStripButton("Open2", Images.CmdOpen, new EventHandler(this.OnOpen), "Open saved rpx file 2"),
        createToolStripButton("Save2", Images.CmdSave, new EventHandler(this.OnSaveToDisk), "Save to disk 2")
    };
    ToolStrip openSaveToolStrip2 = new ToolStrip(openSaveButtonArr2);
    tsPanel.Join(openSaveToolStrip2, 1);
    <--Other code here-->
}

在上面的代码中，我创建的第一个工具条不会出现，但是第二个工具条(openSaveToolStrip2)会出现。顺便说一句，如果我只对这两个工具条使用连接重载连接(ToolStrip)，则不会出现任何情况。另外，如果我将工具条添加到其他行，即tsPanel.Join(toolstrip3，2)或tsPanel.Join(toolstrip4，3)，则将出现这些工具条。

似乎，出于某种莫名其妙的原因(至少对我而言)，我添加的第一个工具条从未出现过，但所有后续的工具条都会出现。作为一种解决办法，我只是创建了一个虚拟工具条，添加了它，然后添加了我所有的实际工具条。这感觉很烦人，所以我很想弄清楚为什么会发生这种事。我试图跟踪文档论MSDN，但我肯定仍然遗漏了一些东西，因为我无法想象这样的bug没有得到修复。

有人知道这里可能出了什么问题吗？

Answer 1

在工具条面板中使用所有工具条运行应用程序的屏幕截图

​

​

我取走了您的代码并删除了分散的成员，以便可以编译或与您的问题无关的内容(例如://私有Panel pnlToolbox；//私有Panel pnlProperties;)。我创建了运行时工具条，并将它们加入到面板中，就像您一样。我还提供了我自己的createToolStripButton实现，因为您没有。第三个工具条使用Image.FromStream和web资源，因为我缺少本地资源。不管有没有图像我都没有任何故障..。

以下是完整的例子：

public partial class MFDesigner : Form {
    private ToolStripPanel tsPanel;
    //private Panel pnlToolbox;
    //private Panel pnlProperties;        

    public MFDesigner ( )
    {
      InitializeComponent();
      //
      // first toolstrip
      //
      ToolStripButton tsbOpen = new ToolStripButton("Open", null, new EventHandler(this.OnOpen), "Open saved file");
      ToolStripButton tsbSave = new ToolStripButton("Save", null, new EventHandler(this.OnSaveToDisk), "Save to disk");
      ToolStripButton[] openSaveButtonArr = new ToolStripButton[] { tsbOpen, tsbSave };
      ToolStrip openSaveToolStrip = new ToolStrip(openSaveButtonArr) { CanOverflow = true };
      this.tsPanel.Join(openSaveToolStrip);    
      //
      // second toolstrip
      //
      ToolStripButton tsbOpen2 = createToolStripButton("Open2", null, new EventHandler(this.OnOpen), "Open saved file");
      ToolStripButton tsbSave2 = createToolStripButton("Save2", null, new EventHandler(this.OnSaveToDisk), "Save to disk");
      ToolStripButton[] openSaveButtonArr2 = new ToolStripButton[] { tsbOpen2, tsbSave2 };
      ToolStrip openSaveToolStrip2 = new ToolStrip(openSaveButtonArr2) { CanOverflow = true };
      this.tsPanel.Join(openSaveToolStrip2, 1);      
      //
      // third toolstrip
      //
      WebClient wc = new WebClient();
      byte[] bytes = wc.DownloadData("http://my.crestron.eu/images/icons/ico_folder_open.png");
      // You must keep the stream open for the lifetime of the Image.
      MemoryStream msOpen = new MemoryStream(bytes);
      System.Drawing.Image imgOpen = System.Drawing.Image.FromStream(msOpen);

      bytes = wc.DownloadData("http://www.njrussians.com/images/save_ico.png");
      MemoryStream msSave = new MemoryStream(bytes);
      System.Drawing.Image imgSave = System.Drawing.Image.FromStream(msSave);
      ToolStripButton tsbOpen3 = createToolStripButton("Open3", imgOpen, new EventHandler(this.OnOpen), "Open saved file");
      ToolStripButton tsbSave3 = createToolStripButton("Save3", imgSave, new EventHandler(this.OnSaveToDisk), "Save to disk");
      ToolStripButton[] openSaveButtonArr3 = new ToolStripButton[] { tsbOpen3, tsbSave3 };
      ToolStrip openSaveToolStrip3 = new ToolStrip(openSaveButtonArr3) { CanOverflow = true };
      this.tsPanel.Join(openSaveToolStrip3, 2);     

    }

    ToolStripButton createToolStripButton (string text, Image i, EventHandler eh, string name)
    {
      return new ToolStripButton(text, i, eh, name);
    }

    void MFDesigner_Resize (object sender, System.EventArgs e) { }

    void MFDesigner_Load (object sender, System.EventArgs e) { }

    void OnOpen (object target, EventArgs e) { }

    void OnSaveToDisk (object target, EventArgs e) { }

    #region Windows Form Designer generated code
    /// <summary>
    /// Required designer variable.
    /// </summary>
    private System.ComponentModel.IContainer components = null;

    /// <summary>
    /// Clean up any resources being used.
    /// </summary>
    /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
    protected override void Dispose (bool disposing)
    {
      if (disposing && (components != null))
      {
        components.Dispose();
      }
      base.Dispose(disposing);
    }

    /// <summary>
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent ( )
    {
      this.tsPanel = new System.Windows.Forms.ToolStripPanel();
      this.SuspendLayout();
      // 
      // tsPanel
      // 
      this.tsPanel.Dock = System.Windows.Forms.DockStyle.Top;
      this.tsPanel.Location = new System.Drawing.Point(0, 0);
      this.tsPanel.Margin = new System.Windows.Forms.Padding(3);
      this.tsPanel.Name = "tsPanel";
      this.tsPanel.Orientation = System.Windows.Forms.Orientation.Horizontal;
      this.tsPanel.RowMargin = new System.Windows.Forms.Padding(3, 0, 0, 0);
      this.tsPanel.Size = new System.Drawing.Size(984, 0);
      // 
      // MFDesigner
      // 
      this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
      this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
      this.BackColor = System.Drawing.Color.Gainsboro;
      this.ClientSize = new System.Drawing.Size(984, 632);
      this.Controls.Add(this.tsPanel);
      this.ForeColor = System.Drawing.Color.Black;
      this.Name = "MFDesigner";
      this.Text = "MFDesigner";
      this.Load += new System.EventHandler(this.MFDesigner_Load);
      this.Resize += new System.EventHandler(this.MFDesigner_Resize);
      this.ResumeLayout(false);
      this.PerformLayout();    
    }    


    #endregion    
  }