//显示增加联系人窗体，并将其父窗体设置为当前窗体
private void 增加联系人SToolStripMenuItem_Click(object sender, EventArgs e)
{
frmAddUser users = new frmAddUser();
users.MdiParent = this;
users.Show();
}
//双击查看联系人详细信息并修改
private void dgvAllUser_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
{
string Name = this.dgvAllUser.SelectedCells[1].Value.ToString();
string Type = this.dgvAllUser.SelectedCells[2].Value.ToString();
string Num = this.dgvAllUser.SelectedCells[3].Value.ToString();
frmAddUser frmadduser = new frmAddUser();
frmadduser.LinkmanName = Name;
frmadduser.Type = Type;
frmadduser.Num = Num;
frmadduser.Text = "修改联系人";
frmadduser.ShowDialog();
}