如何將光標移動到C＃中富文本框中的下一個單詞＃

Question

在C＃中，如何將光標移動到富文本框中的下一個單詞？例如

給出的句子

「他是個男孩」

讓我們假設，目前「他」，我想之前將其移動到的位置之後，前「是」，即光標定位「一」即在「是」之後。

可以richtextbox.SelectionStart用於執行此類操作嗎？

Answer 1

，如果你不介意使用的SendKeys然後TEH下面的例子將實現您的要求

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

    private void button1_Click(object sender, EventArgs e) 
    { 
     richTextBox1.Focus(); 
     SendKeys.SendWait("^{LEFT}"); 
    } 

    private void button2_Click(object sender, EventArgs e) 
    { 
     richTextBox1.Focus(); 
     SendKeys.SendWait("^{RIGHT}"); 
    } 
} 

Answer 2

您應該嘗試使用.Find（Char）方法找到下一個空格的位置。

int x = richtextbox.Find(' '); 
richtextbox.SelectionStart = x; 
richtextbox.Focus(); 

沒有測試它的可能性，但我應該工作。

Answer 3

這應該工作：

int curr = richTextBox1.SelectionStart; 

int x = Regex.Match(richTextBox1.Text.Substring(curr), @"\s[^\s]").Index; 

if (x != 0) 
    richTextBox1.SelectionStart = x + curr + 1; 

richTextBox1.Focus(); 

Answer 4

如果你的目的是爲了尋找一個字;突出顯示並將光標移動到找到的單詞： 注意：搜索按鈕的工作方式爲「每次點擊」;所以每次點擊它將搜索richtextBox文本文件中的下一個匹配詞。

// Search text and Highlight it (Per Click) 
    // Manually add the "FindText" 
    public int FindText(string txtToSearch, int searchStart, int searchEnd) 
    { 
     // Unselect the previously searched string 
     if (searchStart > 0 && searchEnd > 0 && IndexOfSearchText >= 0) 
     { rtb.Undo(); } 

     // Set the return value to -1 by default. 
     int retVal = -1; 

     // A valid starting index should be specified. 
     // if indexOfSearchText = -1, the end of search 
     if (searchStart >= 0 && IndexOfSearchText >= 0) 
     { 
      // A valid ending index 
      if (searchEnd > searchStart || searchEnd == -1) 
      { 
       // Find the position of search string in RichTextBox 
       IndexOfSearchText = rtb.Find(txtToSearch, searchStart, searchEnd, RichTextBoxFinds.None); 
       // Determine whether the text was found in richTextBox1. 
       if (IndexOfSearchText != -1) 
       { 
        // Return the index to the specified search text. 
        retVal = IndexOfSearchText; 
       } 
      } 
     } 
     return retVal; 
    } 

    // Button to Perform the Search (By Click) 
    private void btn_Search_Click(object sender, EventArgs e) 
    { 
     int startIndex = 0; 

     if (txt_Search.Text.Length > 0) startIndex = FindText(txt_Search.Text.Trim(), start, rtb.Text.Length); 

     // If string was found in the RichTextBox, highlight it 
     if (startIndex >= 0) 
     { 
      int x = rtb.Find(txt_Search.Text); 
      rtb.SelectionStart = x; 
      rtb.Focus(); 
      // Set the highlight color as red 
      rtb.SelectionBackColor = Color.LightYellow; // Remove to avoid minor Bug 
      rtb.SelectionColor = Color.Black;   // Remove to avoid Minor Bug 
      // Find the end index. End Index = number of characters in textbox 
      int endindex = txt_Search.Text.Length; 
      // Highlight the search string 
      rtb.Select(startIndex, endindex); 
      // mark the start position after the position of 
      // last search string 
      start = startIndex + endindex; 
     } 

    } 

    // TextBox to Search 
    private void txt_Search_TextChanged(object sender, EventArgs e) 
    { 
     start = 0; 
     IndexOfSearchText = 0; 
    } 
} 

}

希望這有助於。