C＃Windows从添加/删除列表

Question

我需要添加一个“slushbucket”（ServiceNow术语）到C＃Windows窗体，如下图所示，但无法弄清楚它们实际调用了什么，因此不能看看他们是如何创建的。

有谁知道他们叫什么，或者更好，但如何实现一个窗口窗体？

我需要它列出左侧Table1的值，然后当它们被添加到右侧列表并单击保存按钮时，这些值将被写入到Table2中。如果有的话，它还需要显示Table2的现有值。

Answer 1

假设这是形式的样子： Form1.Png 这里是实现你的想法如下一个简单的代码：

public partial class Form1 : Form 
{ 
    public Form1() 
    { 
     InitializeComponent(); 

     for (int i = 6; i <= 10; i++) 
     { 
      listBox1.Items.Add("item" + i); 
     } 
     for (int i = 1; i <= 5; i++) 
     {    
      listBox2.Items.Add("item" + i); 
     } 
    } 

    private void btnSave_Click(object sender, EventArgs e) 
    {` 

     if (listBox2.Items.Count >0) 
     { 
      string message = ""; 
      foreach (var item in listBox2.Items) 
      { 
       message += item + "\n"; 
      } 
      MessageBox.Show(message); 
     }` 
     /// write here the code that save listbox1 and listbox2 items 
     /// to a text file or a database table and load this text file or 
     /// the database table inside these two listboxes you could write the 
     /// code that load data to the two list boxes in the constructor instead 
     /// of the tow for loops thats i've provided. 
    } 

    private void btnAdd_Click(object sender, EventArgs e) 
    { 
     try 
     { 
      if (!listBox2.Items.Contains(listBox1.SelectedItem)) 
      { 
       listBox2.Items.Add(listBox1.SelectedItem); 
       listBox1.Items.Remove(listBox1.SelectedItem); 
      } 
      else 
      { 
       MessageBox.Show("Item already exists"); 
      } 
     } 
     catch (ArgumentNullException exc) 
     { 
      MessageBox.Show("Nothing selected to add"); 

     }   
    } 

    private void btnRemove_Click(object sender, EventArgs e) 
    { 
     try 
     { 
      if (!listBox1.Items.Contains(listBox2.SelectedItem)) 
      { 
       listBox1.Items.Add(listBox2.SelectedItem); 
       listBox2.Items.Remove(listBox2.SelectedItem); 
      } 
      else 
      { 
       MessageBox.Show("Item already exists"); 
      } 

     } 
     catch (ArgumentNullException exc) 
     { 

      MessageBox.Show("Nothing selected to remove"); 
     } 

    } 
} 

希望这就是你要找的人:) 谢谢。

Answer 2

这是图像输出：

，你的代码如下。我希望这会对你有所帮助。

public partial class Form1 : Form 
{ 
    ArrayList Table1; 
    ArrayList Table2; 
    bool isSaved = false; 
    public Form1() 
    { 
     InitializeComponent(); 
     Table1 = new ArrayList(); 
     Table2 = new ArrayList(); 

     Table1.Add("Value1"); 
     Table1.Add("Value2"); 
     Table1.Add("Value3"); 
     Table1.Add("Value4"); 
     Table1.Add("Value5");   
    } 
    private void populateListBox1() { 
     for (int i = 0; i < Table1.Count;i++) 
     { 
      listBox1.Items.Add(Table1[i]); 
     } 
    } 
    private void Form1_Load(object sender, EventArgs e) 
    { 
     populateListBox1();   
    } 
    private void refreshListBox1() { 
     listBox1.Items.Clear(); 
     populateListBox1(); 
    } 
    private void addToRight() { 
     try 
     { 
      listBox2.Items.Add(Table1[listBox1.SelectedIndex]); 
      Table1.RemoveAt(listBox1.SelectedIndex); 
     } 
     catch 
     { 
      MessageBox.Show("You have to select an item first !"); 
     } 

     refreshListBox1(); 
    } 
    private void removeFromRight(){ 
     if (isSaved) 
     { 
      try 
      { 
       listBox1.Items.Add(Table2[listBox2.SelectedIndex]); 
       Table1.Add(Table2[listBox2.SelectedIndex]); 
       isSaved = false; 
      } 
      catch 
      { 
       MessageBox.Show("You have to select an item first !"); 
       isSaved = true; 
      } 
      try 
      { 
       Table2.RemoveAt(listBox2.SelectedIndex); 
       listBox2.Items.RemoveAt(listBox2.SelectedIndex); 
       isSaved = false; 
      } 
      catch 
      { 
       if(listBox2.Items.Count==0) 
       MessageBox.Show("This list is an empty list"); 
       isSaved = true; 
      } 

     } 
     else { 
      MessageBox.Show("You have to click save button first !"); 
     } 

    } 
    private void saveToTable2() { 
     for (int i = 0; i < listBox2.Items.Count;i++) 
     { 
      Table2.Add(listBox2.Items[i].ToString()); 
     } 
     MessageBox.Show("Saved !"); 
     isSaved=true;   
    } 
    private void btn_add_Click(object sender, EventArgs e) 
    { 
     addToRight(); 
    } 

    private void btn_save_Click(object sender, EventArgs e) 
    { 
     saveToTable2();   
    } 

    private void btn_remove_Click(object sender, EventArgs e) 
    { 
     removeFromRight(); 
    } 
} 

}