public static sjkglForm Create() { if (sjkgl == null) { sjkgl = new sjkglForm(); } return(sjkgl); }
private void 数据库管理ToolStripMenuItem_Click(object sender, EventArgs e) { if (!FilterClass.sjkgl()) { MessageBox.Show("无权操作!"); return; } sjkglForm sjkgl = sjkglForm.Create(); sjkgl.Show(); sjkgl.Focus(); }
private void sjkglForm_FormClosed(object sender, FormClosedEventArgs e) { sjkgl = null; }