public static frmClass Instacne()
{
if (_Instance == null)
{
_Instance = new frmClass();
}
return(_Instance);
}
private void 班级信息ToolStripMenuItem_Click(object sender, EventArgs e)
{
frmClass f = frmClass.Instacne();
f.MdiParent = this;
f.Show();
f.Focus();
}
private void metroTile2_Click(object sender, EventArgs e)
{
frmClass f = frmClass.Instacne();
//f.MdiParent = this;
f.Show();
f.Focus();
}
private void metroTile3_Click(object sender, EventArgs e)
{
try
{
ChangeEnabledState();
this.Validate();
this.classBindingSource.EndEdit();
this.tableAdapterManager.UpdateAll(this.student_Manage_DB);
}
catch (Exception ex)
{
DialogResult result = MessageBox.Show("对不起，该班级已存在", "操作提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Information);
frmClass f = new frmClass();
this.Close();
f = new frmClass();
f.Show();
f.Focus();
return;
}
}
