private bool LogIn()
{
LogIn LogIn = new LogIn();
if(LogIn.ShowDialog(this) == DialogResult.OK)
{
LogIn.Dispose();
return true;
}
else
{
LogIn.Dispose();
return false;
}
} private void MDIMain_Load(object sender, System.EventArgs e)
{
this.ShowInTaskbar = false;
if(LogIn() == false)
{
this.Hide();
Application.Exit();
return;
}
lblAdminName.Text = lblAdminName.Text.Replace("name",AdminUserName);
this.WindowState = System.Windows.Forms.FormWindowState.Maximized;
this.ShowInTaskbar = true;
}
{
LogIn LogIn = new LogIn();
if(LogIn.ShowDialog(this) == DialogResult.OK)
{
LogIn.Dispose();
return true;
}
else
{
LogIn.Dispose();
return false;
}
} private void MDIMain_Load(object sender, System.EventArgs e)
{
this.ShowInTaskbar = false;
if(LogIn() == false)
{
this.Hide();
Application.Exit();
return;
}
lblAdminName.Text = lblAdminName.Text.Replace("name",AdminUserName);
this.WindowState = System.Windows.Forms.FormWindowState.Maximized;
this.ShowInTaskbar = true;
}
this.Close();在LogIn窗体的确定按钮里写这两句
//主窗体Global
static void Main()
{
if((new Login()).ShowDialog() == DialogResult.OK) Application.Run(new Global());
}//登陆窗体Login
private void btnLogin_Click(object sender, System.EventArgs e)
{
//身份验证
if(ture)
{
this.DialogResult = DialogResult.OK;
}
else MessageBox.Show("用户名或密码错误","错误");
}
A C# Application from Inspiration to Implementation
清华大学出版社
本书适用于有一定C#编程基础,并希望了解应用程序开发全过程的读者!!!!本书完整讲解创建一个商业应用程序(库存应用程序)全过程
1.设计应用程序
2.设计用户界面 (MDI)
3.构建数据库
4.设计规范
5.编写应用程序
6.实现数据库
7.自定义控件
8.用户界面
9.打印报表
10.添加帮助系统
11创建安装程序英文版下载(含源码下载)
http://support.apress.com/books.asp?bID=186100754x&s=0&Go=Select+Book//在主窗体下(Global类)
// 子窗体打开标志,判断ChildFormOpen子窗体是否已打开
public static bool ChildFormOpen = false;private void mnuOpen_Click(object sender, System.EventArgs e)
{
//如果ChildForm没有打开,则创建ChildForm窗体的一个新实例
if (ChildFormOpen == false)
{
ChildForm child = new ChildForm();
child.MdiParent = this;
child.Show();
ChildFormOpen = true;//窗体状态设为已打开
}
//如果ChildForm窗口已打开,把ChildForm窗口带到前面显示给客户。
else
{
for (int i = 0; i < MdiChildren.Length; i++)
{
if (MdiChildren[i].Name == "ChildForm")
{
MdiChildren[i].BringToFront();
}
}
}
}/*在MDI窗体的一个子窗体如何打开/关闭另一个子窗体?*/
//打开
if (Global.ChildFormOpen == false)
{
ChildForm child = new ChildForm();
child.MdiParent = this.MdiParent;
child.Show();
Global.ChildFormOpen = true;
}
else
{
for (int i = 0; i < this.MdiParent.MdiChildren.Length; i++)
{
if (this.MdiParent.MdiChildren[i].Name == "ChildForm")
{
this.MdiParent.MdiChildren[i].BringToFront();
}
}
}
//关闭
for (int i = 0; i < this.MdiParent.MdiChildren.Length; i++)
{
if (this.MdiParent.MdiChildren[i].Name == "ChildForm")
{
this.MdiParent.MdiChildren[i].Close();
}}
/*当激活一个子窗体时执行*/
(Global类)
private void Global_MdiChildActivate(object sender, System.EventArgs e)
{
if(ActiveForm.ActiveMdiChild == null)
{
initializeGlobal();//当没有子窗体打开时,设置窗体默认值 略
}
else
{
switch(ActiveForm.ActiveMdiChild.Name)
{
case"ChildForm":
initializeChildForm();
//如果激活的子窗体为ChildForm,
//设置主窗体(如MDI父窗体中菜单栏、工具栏那些按钮禁用/启用)
//略
break;
}
}
}
private void mnuLogout_Click(object sender, System.EventArgs e)
{
//关闭所有打开的MDI子窗体
while(this.MdiChildren.Length != 0)
{
this.MdiChildren[0].Close();
}
//隐藏主窗体
this.Hide();
//显示登陆窗体
if((new Login()).ShowDialog() == DialogResult.OK)this.Show();
//退出程序
else Application.Exit();
}