/// <summary>
/// 初始化
/// </summary>
public FrmManagerStudents()
{
InitializeComponent();
this.comboBox1.DataSource = studentClassService.getAll();
this.comboBox1.DisplayMember = "className";
this.comboBox1.SelectedIndex = -1;
this.comboBox1.ValueMember = "id";
// 添加事件
this.comboBox1.SelectedValueChanged += new System.EventHandler(this.comboBox1_SelectedValueChanged);
}
public FrmAddStudent()
{
InitializeComponent();
// 设置班级下拉选择
this.comboBox1.DataSource = studentClassService.getAll();
this.comboBox1.DisplayMember = "className";
this.comboBox1.ValueMember = "id";
this.comboBox1.SelectedIndex = -1; // -1 表示没有选中数值，默认为 1
// Picturebox控件大小不变，图片自动调整大小以适应控件的大小，图片完全显示，且图片长宽比例与控件长宽比例一致。
this.pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
}