private void 评估费计算ToolStripMenuItem_Click(object sender, EventArgs e) { Form f = Application.OpenForms["Pinggufei"]; //查找是否打开过Form1窗体 if (f == null) //没打开过 { Pinggufei pinggufei = new Pinggufei(); pinggufei.MdiParent = this; pinggufei.Show(); } else { f.Focus(); //打开过就让其获得焦点 } //////////////////////// }
private void 评估费计算ToolStripMenuItem_Click(object sender, EventArgs e) { Form f = Application.OpenForms["Pinggufei"]; //查找是否打开过Form1窗体 if (f == null) //没打开过 { Pinggufei pinggufei = new Pinggufei(); pinggufei.MdiParent=this; pinggufei.Show(); } else { f.Focus(); //打开过就让其获得焦点 } //////////////////////// }