共0页 | 上一页 1 下一页
用反射实现的MDI子窗体只运行一个实例
分享首先是通过子窗体类型名来判断是否打开新的子窗体，还是把原有的子窗体进行显示。
using System.Reflection;
/// <summary>
/// Open child window
/// </summary>
/// <param name="ChildTypeString"></param>
private void OpenWindow( string ChildTypeString )
{
Form myChild = null;
if( !ContainMDIChild( ChildTypeString ) )
{
// Get current process assembly
Assembly assembly = Assembly.GetExecutingAssembly();
// Create data type using type string
Type typForm = assembly.GetType( ChildTypeString );
// Create object using type's "InvokeMember" method
Object obj = typForm.InvokeMember(
null,
BindingFlags.DeclaredOnly |
BindingFlags.Public | BindingFlags.NonPublic |
BindingFlags.Instance | BindingFlags.CreateInstance,
null,
null,
null );
// Show child form
if( obj != null )
{
myChild = obj as Form;
myChild.MdiParent = this;
myChild.Show();
myChild.Focus();
}
}
}
/// <summary>
/// Search mdi child form by specific type string
/// </summary>
/// <param name="ChildTypeString"></param>
/// <returns></returns>
private bool ContainMDIChild( string ChildTypeString )
{
Form myMDIChild = null;
foreach(Form f in this.MdiChildren)
{
if( f.GetType().ToString() == ChildTypeString )
{
// found it
myMDIChild = f;
break;
}
}
// Show the exist form
if( myMDIChild != null)
{
myMDIChild.TopMost = true;
myMDIChild.Show();
myMDIChild.Focus();
return true;
}
else
return false;
}
如：
//Open a mdi child form which type named "MDIChild"
OpenWindow( typeof( MDIChild ).ToString() );
uxspy共0页 | 上一页 1 下一页
