/// <summary>
/// 打开窗体
/// </summary>
/// <param name="mdiChildTypeString"></param>
/// <returns></returns> private void ShowWindow(string mdiChildTypeString)
{
Form currentMdiChild = null;
if (!IsMDIChildFormExist(mdiChildTypeString))
{
Assembly assembly = Assembly.GetExecutingAssembly();
Type typForm = assembly.GetType(mdiChildTypeString);
//关于InvokeMember用法,不明白的可以查看:http://msdn.microsoft.com/zh-cn/library/de3dhzwy(VS.80).aspx
Object mdiChild = typForm.InvokeMember(
null,
BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.CreateInstance,
null,
null,
null);
if (mdiChild != null)
{
currentMdiChild = mdiChild as Form;
currentMdiChild.MdiParent = this;
currentMdiChild.WindowState = FormWindowState.Maximized;
currentMdiChild.Show();
currentMdiChild.Focus();
}
}
}
/// <summary>
/// 检查MDI子窗体是否存在
/// </summary>
/// <param name="mdiChildTypeString"></param>
/// <returns></returns>
private bool IsMDIChildFormExist(string mdiChildTypeString)
{
Form currentMDIChild = null;
foreach (Form mdiChildFrm in this.MdiChildren)
{
if (mdiChildFrm.GetType().ToString() == mdiChildTypeString)
{
currentMDIChild = mdiChildFrm;
break;
}
}
if (currentMDIChild != null)
{
if (currentMDIChild.WindowState == FormWindowState.Minimized)
{
currentMDIChild.WindowState = FormWindowState.Normal;
}
currentMDIChild.TopMost = true;
currentMDIChild.Activate();
currentMDIChild.Focus();
return true;
}
else
{
return false;
}
}
//调用方法如下
private void toolStripButton1_Click(object sender, EventArgs e)
{
ShowWindow(typeof(Form1).ToString());
}
private void toolStripButton2_Click(object sender, EventArgs e)
{
ShowWindow(typeof(Form2).ToString());
}