Question

当我将每个标签引用到子表单时，如何从tabcontrol中删除标签。

我正在使用tabcontrol，我想从控件中删除特定的选项卡。我必须在动态字符串中执行此操作。

如何使用字符串中现有的选项卡名称从tabcontrol中删除选项卡？

我尝试了类似......

 string tabToRemove = "tabPageName";
for (int i = 0; i < myTabControl.TabPages.Count; i++)
{
if (myTabControl.TabPages[i].Name.Equals(tabToRemove, StringComparison.OrdinalIgnoreCase))
{
    myTabControl.TabPages.RemoveAt(i);
    break;
}

}

但是在上面的代码中，myTabControl.TabPages.Count始终为零。

下面是代码，显示我正在创建选项卡。这很完美。

         public void TabIt(string strProcessName)

        {
                    this.Show();

                    //Creating MDI child form and initialize its fields
                    MDIChild childForm = new MDIChild();
                    childForm.Text = strProcessName;
                    childForm.MdiParent = this;

                    //child Form will now hold a reference value to the tab control
                    childForm.TabCtrl = tabControl1;

                    //Add a Tabpage and enables it
                    TabPage tp = new TabPage();

                    tp.Parent = tabControl1;
                    tp.Text = childForm.Text;
                    tp.Show();
                    //child Form will now hold a reference value to a tabpage
                    childForm.TabPag = tp;
                    //Activate the MDI child form
                    childForm.Show();
                    childCount++;

                    //Activate the newly created Tabpage.
                    tabControl1.SelectedTab = tp;
                    tabControl1.ItemSize = new Size(200, 32);
                    tp.Height = tp.Parent.Height;
                    tp.Width = tp.Parent.Width;
        }


      public void GetTabNames()

      {

foreach (string strProcessName in Global.TabProcessNames)

                    {
                        TabIt(strProcessName);
                    }
        }

儿童表格：

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Diagnostics;
using System.Drawing.Drawing2D;

namespace Daemon
{
    /// <summary>
    /// Summary description for MDIChild.
    /// </summary>
    /// 

    public class MDIChild : System.Windows.Forms.Form
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;
        private TabControl tabCtrl;
        private TabPage tabPag;

        public MDIChild()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();
            //MDIChild TargerForm = new MDIChild();
            //WinApi.SetWinFullScreen(TargerForm.Handle); 
            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if(components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        public TabPage TabPag
        {
            get
            {
                return tabPag;
            }
            set
            {
                tabPag = value;
            }
        }

        public TabControl TabCtrl
        {
            set
            {
                tabCtrl = value;
            }
        }


        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.SuspendLayout();
            // 
            // MDIChild
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
            this.BackColor = System.Drawing.SystemColors.InactiveCaptionText;
            this.ClientSize = new System.Drawing.Size(0, 0);
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
            this.MaximizeBox = false;
            this.MinimizeBox = false;
            this.Name = "MDIChild";
            this.Opacity = 0;
            this.ShowIcon = false;
            this.SizeGripStyle = System.Windows.Forms.SizeGripStyle.Hide;
            this.Text = "MDIChild"; 
            this.Activated += new System.EventHandler(this.MDIChild_Activated);
            this.Closing += new System.ComponentModel.CancelEventHandler(this.MDIChild_Closing);
            this.ResumeLayout(false);

        }
        #endregion

        private void MDIChild_Closing(object sender, System.ComponentModel.CancelEventArgs e)
        {
            try
            {
                //Destroy the corresponding Tabpage when closing MDI child form
                this.tabPag.Dispose();

                //If no Tabpage left
                if (!tabCtrl.HasChildren)
                {
                    tabCtrl.Visible = false;
                }
            }
            catch (Exception ex)
            { 
            }
        }

        private void MDIChild_Activated(object sender, System.EventArgs e)
        {
            try
            {
                //Activate the corresponding Tabpage
                tabCtrl.SelectedTab = tabPag;

                if (!tabCtrl.Visible)
                {
                    tabCtrl.Visible = true;
                }
                Global.ExistingTabProcessNames.Add(tabPag.Text);
            }
            catch (Exception ex)
            { 
            }
        }

    }
}

Answer 1

对于初学者来说，你应该反过来循环：

for (int i = myTabControl.TabPages.Count - 1; i >= 0 ; i--)
{
   ......
}

编辑：不理我。我错过了休息;是的，它也应该是＆gt; = :(

我的下一个理论是你错过了这一行：

 // add the page to the tab control
 tabControl1.Controls.Add(tp);

PS：为什么从SO复制代码不能维护CRLF。那太烦人了！

Answer 2

我不知道你的代码的目的，但如果你最终会重新添加标签，为什么不隐藏它呢？它更容易，一旦页面被隐藏，您就不必担心反向循环逻辑和无效参数。如果您需要一种方法来同时处理所有选项卡，只需检查可见选项卡......

Answer 3

正如jussij建议的那样，你需要这样做：

tabControl1.Controls.Add(tp);

您可以更轻松地找到这样的标签：

var foundTab = (from System.Windows.Forms.TabPage tab in tabControl1.TabPages.Cast<TabPage>()
                where tab.Name == "tabName"
                select tab).First();

Answer 4

我建议您查看this标签页示例，以添加/删除标签。

如何使用c＃从tabcontrol中删除选项卡

4 个答案: