將文本框中的URL添加到Windows窗體應用程序中的列表框中＃

Question

Iam new in programming.In Windows窗體應用程序中，我希望用戶可以在文本框中編寫URL並在列表框中添加（使用按鈕）作爲收藏夾列表，然後用戶可以單擊在列表框中，然後去瀏覽器，finaly可以保存並打開列表？缺少Microsoft Sql數據庫。我需要一個源代碼。

文本框（輸入您的網站）：www.google.com

按鈕：添加到列表框中

列表框：WWW.Google.com

按鈕：保存

按鈕：打開

Answer 1

如果不想使用數據庫，則必須將ListBox.Items保存爲純文本文件。沒有約束力，如果你開始深入研究，這個簡單的問題會變得有點討厭。這裏是你可能需要的解決方案之一：

public partial class Form1 : Form 
{ 
    public Form1() 
    { 
     InitializeComponent(); 
    } 
    int lastIndex = -1; 
    bool suppressSelectedIndexChanged; 
    //Click event handler for buttonAdd 
    private void buttonAdd_Click(object sender, EventArgs e) 
    { 
     listBox1.Items.Add(textBox1.Text); 
     suppressSelectedIndexChanged = true; 
     listBox1.SelectedIndex = listBox1.Items.Count - 1; 
     suppressSelectedIndexChanged = false; 
    } 
    //Click event handler for buttonRemove 
    private void buttonRemove_Click(object sender, EventArgs e) 
    { 
     if (listBox1.SelectedIndices.Count == 0) return; 
     int k = listBox1.SelectedIndices[0]; 
     suppressSelectedIndexChanged = true; 
     for (int i = listBox1.SelectedIndices.Count - 1; i >= 0; i--) 
      listBox1.Items.RemoveAt(listBox1.SelectedIndices[i]); 
     suppressSelectedIndexChanged = false; 
     lastIndex = -1; 
     listBox1.SelectedIndex = k < listBox1.Items.Count ? k : listBox1.Items.Count - 1; 
     if (listBox1.Items.Count == 0) textBox1.Clear(); 
    } 
    //Click event handler for buttonSave 
    private void buttonSave_Click(object sender, EventArgs e) 
    {    
     SaveFileDialog save = new SaveFileDialog(); 
     save.Filter = "URLs file|*.urls"; 
     save.FileOk += (s, ev) => 
     { 
      using (StreamWriter writer = File.CreateText(save.FileName)) 
      { 
       foreach (object item in listBox1.Items) 
       { 
        writer.WriteLine(item.ToString()); 
       } 
      } 
     }; 
     save.ShowDialog(); 
    } 
    //Click event handler for buttonOpen 
    private void buttonOpen_Click(object sender, EventArgs e) 
    { 
     OpenFileDialog open = new OpenFileDialog(); 
     open.Filter = "URLs file|*.urls"; 
     open.FileOk += (s, ev) => 
     { 
      listBox1.Items.Clear(); 
      using (StreamReader reader = File.OpenText(open.FileName)) 
      { 
       string line = ""; 
       while ((line = reader.ReadLine()) != null) 
       { 
        listBox1.Items.Add(line); 
       } 
      } 
     }; 
     open.ShowDialog(); 
    } 
    //SelectedIndexChanged event handler for listBox1 
    private void listBox1_SelectedIndexChanged(object sender, EventArgs e) 
    { 
     if (suppressSelectedIndexChanged) return; 
     if (lastIndex > -1) 
     { 
      listBox1.Items[lastIndex] = textBox1.Text;     
     }    
     lastIndex = listBox1.SelectedIndex; 
     if (listBox1.SelectedIndex > -1) 
      textBox1.Text = listBox1.Items[listBox1.SelectedIndex].ToString(); 
    } 
    //Click event handler for buttonVisit 
    private void buttonVisit_Click(object sender, EventArgs e) 
    { 
     if (listBox1.SelectedItem == null) return; 
     System.Diagnostics.Process.Start(listBox1.SelectedItem.ToString()); 
    } 
} 

這裏是GUI截屏讓你知道需要哪些控件：

Answer 2

 private void btnAdd_Click(object sender, EventArgs e) 
    { 
     string _webstring = @"http://"; 
     string _website = _webstring + textBox1.Text; 
     listBox1.Items.Add(_website); 

     using (StreamWriter w = File.AppendText("websites.txt")) 
     { 
       WriteLog(_website, w); 

     } 
     using (StreamReader r = File.OpenText("websites.txt")) 
     { 
      DisposeLog(r); 
     } 
    } 

    private void btnLaunch_Click(object sender, EventArgs e) 
    { 
     System.Diagnostics.Process.Start("iexplore.exe", listBox1.SelectedItem.ToString()); 
    } 

    private void btnSave_Click(object sender, EventArgs e) 
    { 
     using (StreamWriter w = File.AppendText("websites.txt")) 
     { 
      foreach (string items in listBox1.Items) 
      { 
       WriteLog(items, w); 
      } 
     } 
     using (StreamReader r = File.OpenText("websites.txt")) 
     { 
      DisposeLog(r); 
     } 
    } 


    public static void WriteLog(string logMessage, TextWriter w) 
    { 
     w.WriteLine(logMessage, logMessage); 
    } 

    public static void DisposeLog(StreamReader r) 
    { 
     string line; 
     while ((line = r.ReadLine()) != null) 
     { 
      Console.WriteLine(line); 
     } 
    } 

    private void btnRetrieve_Click(object sender, EventArgs e) 
    { 
     using (TextReader txtRead = File.OpenText("Websites.txt")) 
     { 
      string _text = ""; 
      string[] _textArray = null; 
      while ((_text = txtRead.ReadLine()) != null) 
      { 
       _textArray = _text.Split('\t'); 
       listBox1.Items.Add(txtRead.ReadLine()); 
      } 
      txtRead.Close(); 
     } 
    } 

希望這可以幫助..謝謝