c＃使用system.io保存标签;

Question

我有下面的代码。我觉得我已经非常接近我需要的东西了。在开始时有一个主选项卡（不包含tb，tb1，tb2和tb3），一旦我点击该按钮，将生成一个包含tb，tb1，tb2，tb3的选项卡

tb，tb1，tb2，而不是现有的TB3显示错误。我根本无法弄清楚如何让这些保存。

public partial class Form1 : Form 
    { 
     public string status = "no"; 

     public Form1() 
     { 
      InitializeComponent(); 
     } 

     private void button1_Click(object sender, EventArgs e) 
     { 
      string name = txtName.Text; 


      //validate information 
      try { } 
      catch { } 

      //create new tab 
      string title = name; 
      TabPage myTabPage = new TabPage(title); 
      tabControl1.TabPages.Add(myTabPage); 


      //Add Labels 

      Label lb = new Label(); 
      lb.Text = "Denomination:"; 
      lb.Location = new System.Drawing.Point(150, 75); 
      lb.Name = "lbl"; 
      lb.Size = new System.Drawing.Size(100, 20); 
      myTabPage.Controls.Add(lb); 

      Label lb2 = new Label(); 
      lb2.Text = "Year:"; 
      lb2.Location = new System.Drawing.Point(150, 120); 
      lb2.Name = "lbl2"; 
      lb2.Size = new System.Drawing.Size(100, 20); 
      myTabPage.Controls.Add(lb2); 

      Label lb3 = new Label(); 
      lb3.Text = "Grade:"; 
      lb3.Location = new System.Drawing.Point(150, 165); 
      lb3.Name = "lbl3"; 
      lb3.Size = new System.Drawing.Size(100, 20); 
      myTabPage.Controls.Add(lb3); 

      Label lb4 = new Label(); 
      lb4.Text = "Mint Mark:"; 
      lb4.Location = new System.Drawing.Point(150, 210); 
      lb4.Name = "lbl4"; 
      lb4.Size = new System.Drawing.Size(100, 20); 
      myTabPage.Controls.Add(lb4); 

      //Add text boxes 

      TextBox tb = new TextBox(); 
      tb.Location = new System.Drawing.Point(250, 75); 
      tb.Name = "txt"; 
      tb.Size = new System.Drawing.Size(184, 20); 
      myTabPage.Controls.Add(tb); 

      TextBox tb1 = new TextBox(); 
      tb1.Location = new System.Drawing.Point(250, 120); 
      tb1.Name = "txt1"; 
      tb1.Size = new System.Drawing.Size(184, 20); 
      myTabPage.Controls.Add(tb1); 

      TextBox tb2 = new TextBox(); 
      tb2.Location = new System.Drawing.Point(250, 165); 
      tb2.Name = "txt2"; 
      tb2.Size = new System.Drawing.Size(184, 20); 
      myTabPage.Controls.Add(tb2); 

      TextBox tb3 = new TextBox(); 
      tb3.Location = new System.Drawing.Point(250, 210); 
      tb3.Name = "txt3"; 
      tb3.Size = new System.Drawing.Size(184, 20); 
      myTabPage.Controls.Add(tb3); 

      //put data inside of textboxes 

      tb.Text = txtCoin.Text; 
      tb1.Text = txtYear.Text; 
      tb2.Text = txtGrade.Text; 
      tb3.Text = txtMint.Text; 

      // Add delete button 

      Button bn = new Button(); 
      bn.Location = new System.Drawing.Point(560, 350); 
      bn.Name = "btnDelete"; 
      bn.Text = "Delete"; 
      bn.Size = new System.Drawing.Size(100, 50); 
      bn.Click += MyClick; 
      myTabPage.Controls.Add(bn); 
     } 

     private void MyClick(object sender, EventArgs e) 
     { 
      Form2 myform = new Form2(); 
      myform.ShowDialog(); 




      if (status == "yes") 
      { tabControl1.TabPages.Remove(tabControl1.SelectedTab); } 

      status = "no"; 

     } 

     private void btnExit_Click(object sender, EventArgs e) 
     { 
      this.Close(); 
     } 

     private void Form1_FormClosing(object sender, FormClosingEventArgs e) 
     { 

      int counter; 
      int ccounter; 
      string outLine ; 

      string pathFileName = Path.Combine(Application.StartupPath, "coins.dat"); 

      StreamWriter writeIt = new StreamWriter(pathFileName); 


      foreach (TabPage tabPage in tabControl1.TabPages) 
      { 


       if (tabControl1.TabCount > 1) 
       { 
        outLine = tabPage + tb.Text + tb1.Text + tb2.Text + tb3.Text + "\t"; 
        writeIt.WriteLine(outLine); 
       } 

       if (tabControl1.TabCount == 1) 
       { 
        outLine = tabPage + "\t"; 
        writeIt.WriteLine(outLine); 
       } 
      } 


      writeIt.Close(); 

     } 
    } 
} 

Answer 1

您需要存储tb1等在你的表单字段，以便他们可以通过其他方法来访问。

Answer 2

tb，tb1，tb2和tb3显示不存在的错误。

是的，他们会 - 你声明它们是局部变量在button1_Click之内。要从其他方法访问它们，您需要检查标签页中的控件，或者将其声明为实例变量。但是，在这种情况下，您需要考虑可能存在多个标签页的事实。

这听起来像是你真的只需要遍历每个标签页中的控件，并挑选出文本框。要么是，要么创建自己的子类TabPage，它知道文本框。然后，您可以找到您的自定义TabPage的每个实例，并要求它自行保存。