我可以告訴標籤上點擊了哪個字符嗎？

Question

我有一個帶有標籤（或另一個控件，我打開選項）的窗體顯示外國字符。

我想要做的是，當用戶點擊其中一個字符時，它應該打開一個有關該字符信息的模式對話框。

標籤框可以知道標籤的哪個部分或哪個字符被點擊了嗎？

Answer 1

我會使用FlowLayoutPanel並將每個字符單獨添加爲LinkLabel。

Answer 2

您可以自行獲取此信息，並在您的標籤上使用MouseEvent之一。結合Graphics.MeasureString,MouseEventArgs.Location，請記住可能的Control.Padding值，並且您可能會接近您的需要。

但是，這可能不是達到目標的最佳方式（查看所有需要獲取此簡單信息的內容）。就我個人而言，我會去Chris' answer。

Answer 3

嘗試這個

private void label_MouseClick(object sender, MouseEventArgs e) 
    { 
     Label lbl = sender as Label; 
     string s = ""; 
     foreach (char c in lbl.Text) 
     { 
      s += c.ToString(); 
      var x = TextRenderer.MeasureText(s, lbl.Font, lbl.Size, TextFormatFlags.TextBoxControl); 
      Rectangle txtRec = new Rectangle(-lbl.Margin.Left, -lbl.Margin.Top, x.Width, x.Height); 
      if (txtRec.Contains(e.Location)) 
      { 
       MessageBox.Show("You clicked " + c.ToString()); 
       break; 
      } 
     } 
    } 

Answer 4

public partial class Form1 : Form 
{ 
    CharInfo[] charinfo; 
    int selectedChar = -1; 

    public Form1() 
    { 
     InitializeComponent(); 
     charinfo = CharInfo.MeasureCharacters(label1); 
     label1.BackColor = Color.Transparent; 
    } 

    protected override void OnPaint(PaintEventArgs e) 
    { 
     if (selectedChar >= 0) 
     { 
      Rectangle highlightRect = Rectangle.Round(charinfo[selectedChar].charBounds); 
      highlightRect.Offset(label1.Location); 
      e.Graphics.FillRectangle(SystemBrushes.Highlight, highlightRect); 
     } 
     base.OnPaint(e); 
    } 

    private void label1_MouseMove(object sender, MouseEventArgs e) 
    { 
     for (int i = 0; i < charinfo.Length; i++) 
     { 
      if (charinfo[i].charBounds.Contains(e.Location)) 
      { 
       if (selectedChar != i) 
       { 
        selectedChar = i; 
        Invalidate(label1.Bounds); 
       } 
       break; 
      } 
     } 
    } 

    class CharInfo 
    { 
     public RectangleF charBounds; 
     public int charIndex; 
     CharInfo(RectangleF rect, int index) 
     { 
      charBounds = rect; 
      charIndex = index; 
     } 

     public static CharInfo[] MeasureCharacters(Label lbl) 
     { 
      using (Graphics g = Graphics.FromHwnd(lbl.Handle)) 
      { 
       StringFormat sf = new StringFormat(); 
       List<CharInfo> result = new List<CharInfo>(); 
       for (int curIndex = 0; lbl.Text.Length > curIndex; curIndex += 32) 
       { 
        int nextGroup = Math.Min(lbl.Text.Length, curIndex + 32); 
        CharacterRange[] ranges = new CharacterRange[nextGroup - curIndex]; 
        for (int i = curIndex; i < nextGroup; i++) 
         ranges[i % 32] = new CharacterRange(i, 1); 
        sf.SetMeasurableCharacterRanges(ranges); 
        Region[] charRegions = g.MeasureCharacterRanges(lbl.Text, lbl.Font, lbl.ClientRectangle, sf); 
        for (int i = 0; i < charRegions.Length; i++) 
         result.Add(new CharInfo(charRegions[i].GetBounds(g), i)); 
        foreach (Region r in charRegions) 
         r.Dispose(); 
       } 
       sf.Dispose(); 
       return result.ToArray(); 
      } 
     } 
    } 

    private void label1_MouseClick(object sender, MouseEventArgs e) 
    { 
     if (selectedChar >= 0) 
      MessageBox.Show("You clicked " + label1.Text[selectedChar]); 
    } 
}