按鈕點擊打開richTextBox並顯示讀取文件

Question

我有2個按鈕，當我點擊這些按鈕時我讀取了不同的文件。由於文件很大，所以我使用MsgBox來顯示讀取文件，所以我想在richTextBox中顯示它。

如何打開richTextBox並顯示read file當我點擊這些按鈕中的任何一個？

private void button1_Click(object sender, EventArgs e) 
{ 
    DisplayFile(FileSelected);//DisplayFile is the path of the file 
    var ReadFile = XDocument.Load(FileSelected); //Read the selected file to display 

    MessageBox.Show("The Selected" + " " + FileSelected + " " + "File Contains :" + "\n " + "\n " + ReadFile); 
    button1.Enabled = false; 
} 

private void button2_Click(object sender, EventArgs e) 
{ 
    FileInfo file = (FileInfo)comboBox2.SelectedItem; 
    StreamReader FileRead = new StreamReader(file.FullName); 
    string FileBuffer = FileRead.ReadToEnd(); //Read the selected file to display 

    //MessageBox.Show("The Selected" + " " + file + " " +"File Contains :" + "\n " + "\n " + FileBuffer); 
    // richTextBox1.AppendText("The Selected" + " " + file + " " + "File Contains :" + "\n " + "\n " + FileBuffer); 
    //richTextBox1.Text = FileBuffer; 
} 

有沒有其他方法可以做到這一點？

Answer 1

這裏是一個簡單的例子（基於代碼的表單設計）。這是更好，如果你通過GUI設計器創建表單：

private void button1_Click(object sender, EventArgs e) 
{ 
    //test call of the rtBox 
    ShowRichMessageBox("Test", File.ReadAllText("test.txt")); 
} 

/// <summary> 
/// Shows a Rich Text Message Box 
/// </summary> 
/// <param name="title">Title of the box</param> 
/// <param name="message">Message of the box</param> 
private void ShowRichMessageBox(string title, string message) 
{ 
    RichTextBox rtbMessage = new RichTextBox(); 
    rtbMessage.Text = message; 
    rtbMessage.Dock = DockStyle.Fill; 
    rtbMessage.ReadOnly = true; 
    rtbMessage.BorderStyle = BorderStyle.None; 

    Form RichMessageBox = new Form(); 
    RichMessageBox.Text = title; 
    RichMessageBox.StartPosition = FormStartPosition.CenterScreen; 

    RichMessageBox.Controls.Add(rtbMessage); 
    RichMessageBox.ShowDialog(); 
}