c＃根據點擊按鈕刪除動態創建的複選框

Question

我迷路了。我想從文本文件中刪除一個值。該值是一個checkbox.Name。我想打開一個文本文件，在文本文件中找到相應的用戶名，將其刪除，然後根據點擊按鈕保存該文件。

這裏是我得到checkbox.Name

public static void getPermText(System.Windows.Forms.Form targetForm) 
{ 
    Stream fileStream = File.Open(dataFolder + PermFile, FileMode.Open); 
    StreamReader reader = new StreamReader(fileStream); 

    string line = null; 

    line = reader.ReadToEnd(); 


    string[] parts = line.Split('\n'); 

    string user = userNameOnly(); 
    try 
    { 

     int userCount; 

     userCount = parts.Length; 

     CheckBox[] chkPerm = new CheckBox[userCount]; 
     int height = 1; 
     int padding = 10; 

     for (int i = 0; i < userCount; i++) 
     { 
      chkPerm[i] = new CheckBox(); 

      string Perm = "Perm"; 

      chkPerm[i].Name = parts[i].Trim('\r') + Perm; 

      chkPerm[i].Text = parts[i]; 

      chkPerm[i].TabIndex = i; 

      chkPerm[i].AutoCheck = true; 

      chkPerm[i].Bounds = new Rectangle(15, 40 + padding + height, 100, 22); 

      //Assigns an eventHandler to the chkPerm.CheckBox that tells you if something is clicked, then that checkBox is selected/checked. 
      //Not currently in use. 
      chkPerm[i].Click += new EventHandler(checkChangedPerm); 


      targetForm.Controls.Add(chkPerm[i]); 

      height += 22; 

      //MessageBox.Show(chkPerm[i].Name); 

     } 



    } 
    catch 
    { 

    } 
    fileStream.Close(); 

} 

我可以訪問checkbox.Name基於點擊事件，所以我知道我得到了正確的checkbox.Name

public static void checkChangedPerm(Object sender, EventArgs e) 
{ 

    CheckBox c = sender as CheckBox; 

    if (c.Name != null && c.Name != "") 
    { 
     int count = c.Name.Count(); 

     string trimmed = c.Name.ToString(); 
     string outPut = trimmed.Remove(count - 4); 


    } 
    else 
    { 

    } 


} 

我一直在尋找這個大部分的早上和整個星期五。任何人都可以向我指出正確的方向，或者可能建議一些示例代碼。請請。先謝謝你。我真的很感激它。 :-D

Answer 1

StreamReader reader; 
StreamWriter writer; 

string line, newText = null; 

using (reader = new StreamReader(@"...")) 
{ 
    while ((line = reader.ReadLine()) != null) 
    { 
     if (line != "checkbox name") 
     { 
      newText += line + "\r\n"; 
     } 
    } 
} 

newText = newText.Remove(newText.Length - 2); //trim the last \r\n 

using (writer = new StreamWriter(@"...")) //same file 
{ 
    writer.Write(newText); 
}