richTextBox＋openFileDialog+saveFileDialog的使用方法

打开：
[align=left]if(this.openFileDialog.ShowDialog(this) == DialogResult.OK)[/align]
[align=left] {[/align]
[align=left] string tempFilePath = this.filePath;[/align]
[align=left] try[/align]
[align=left] {[/align]
[align=left] this.filePath = this.openFileDialog.FileName;[/align]
[align=left] this.historyTextBox.Clear();[/align]
[align=left] this.loadFile();[/align]
[align=left] }[/align]
[align=left] catch(Exception)[/align]
[align=left] {[/align]
[align=left] MessageBox.Show("Sorry! Can't open file!");[/align]
[align=left] this.filePath = tempFilePath;[/align]
[align=left] }[/align]
}
保存：
[align=left]if(this.saveFileDialog.ShowDialog(this) == DialogResult.OK)[/align]
[align=left] {[/align]
[align=left] try[/align]
[align=left] {[/align]
[align=left] System.IO.File.Delete(this.saveFileDialog.FileName); FileStream fs = new FileStream(this.saveFileDialog.FileName,FileMode.OpenOrCreate , FileAccess.Write,FileShare.ReadWrite);[/align]
[align=left] StreamWriter sw = new StreamWriter(fs);[/align]
[align=left] sw.Write(this.historyTextBox.Text);[/align]
[align=left] sw.Close();[/align]
[align=left] fs.Close();[/align]
[align=left] }[/align]
[align=left] catch(Exception)[/align]
[align=left] {[/align]
[align=left] MessageBox.Show("Sorry! Can't save file!");[/align]
[align=left] }[/align]
}

[align=left]判断当控件不获取焦点时自动关闭[/align]
[align=left]System.Drawing.Rectangle rect = this.ClientRectangle;[/align]
[align=left] if(e.X < rect.X || e.X > rect.X+rect.Width || e.Y <rect.Y || e.Y > rect.Y+rect.Height)[/align]
[align=left] {[/align]
[align=left] this.Close();[/align]
}
获取某一位置上的控件
Control ct = this.GetChildAtPoint(new Point(e.X,e.Y));
string name = ct.Name;