private void 新建ToolStripMenuItem_Click(object sender, EventArgs e) { Class3ChildForm chd = new Class3ChildForm(); chd.MdiParent = this; chd.Show(); }
private void 打开ToolStripMenuItem_Click(object sender, EventArgs e) { OpenFileDialog openFileDialog = new OpenFileDialog(); openFileDialog.Filter = "富文本文件(*.ustb)|*.ustb"; if (openFileDialog.ShowDialog() == DialogResult.OK) { Class3ChildForm childForm = new Class3ChildForm(); childForm.MdiParent = this; childForm.Show(); childForm.richTextBox1.LoadFile(openFileDialog.FileName); childForm.filePath = openFileDialog.FileName; } }