主题：[求助]请教，有没有办法把目录树导出为一个图片或其他可见的文件

[求助]请教，有没有办法把目录树导出为一个图片或其他可见的文件

参考代码

 

Dim trv As WinForm.TreeView = e.Form.Controls("TreeView1")
Dim doc As New PrintDoc '定义一个报表
For Each nd As WinForm.TreeNode In trv.AllNodes
    Dim rt As New prt.RenderText '定义一个文本对象
    rt.Text = "".PadLeft(nd.Level * 8) & nd.Text
    doc.Body.Children.Add(rt) '将文本对象加入到报表
Next
doc.Preview() '预览

 

http://www.foxtable.com/webhelp/scr/2450.htm

 

再请教下，能不能这些连线也打出来吗？

可以用截屏的方式，参考

 

Dim trv = e.Form.Controls("Treeview1").BaseControl
Dim point As Point = e.Form.Panel.PointToScreen(trv.Bounds.Location)
Dim myGraphics As Graphics = basemainform.CreateGraphics()

Dim s As new Size(trv.width, trv.height) '截取的大小

Dim bit As New Bitmap(s.Width, s.Height, myGraphics)
Dim memoryGraphics As Graphics = Graphics.FromImage(bit)
memoryGraphics.CopyFromScreen(point.x, point.y, 0, 0, s) '截取的开始位置,坐标(100, 200)

bit.save("d:\test.jpg")

bit.dispose

可以用截屏的方式，如果连续截个600张图片，则后来越来越慢。一说明memoryGraphics.在不断地吃内存，没有释放系统资源，且多次连续执行大约200来次就会报GDI 一般性错误。如果优化代码，如何回收系统资源

忘记了，要注销掉

 

Dim trv = e.Form.Controls("Treeview1").BaseControl
Dim point As Point = e.Form.Panel.PointToScreen(trv.Bounds.Location)
Dim myGraphics As Graphics = basemainform.CreateGraphics()
Dim s As new Size(trv.width, trv.height) '截取的大小
Dim bit As New Bitmap(s.Width, s.Height, myGraphics)
Dim memoryGraphics As Graphics = Graphics.FromImage(bit)
memoryGraphics.CopyFromScreen(point.x, point.y, 0, 0, s) '截取的开始位置,坐标(100, 200)
bit.save("d:\test.jpg")
memoryGraphics.dispose
myGraphics.dispose
bit.dispose

大师，我要在程序运行后，截当前窗口为图片，上述代码如何修改？

Dim point As Point = e.Form.Panel.PointToScreen(new point(e.form.left,e.form.top))
Dim myGraphics As Graphics = basemainform.CreateGraphics()
Dim s As new Size(e.form.width, e.form.height) '截取的大小
Dim bit As New Bitmap(s.Width, s.Height, myGraphics)
Dim memoryGraphics As Graphics = Graphics.FromImage(bit)
memoryGraphics.CopyFromScreen(point.x, point.y, 0, 0, s) '截取的开始位置,坐标(100, 200)
bit.save("d:\test.jpg")
memoryGraphics.dispose
myGraphics.dispose
bit.dispose

截图？目录树过大怎么办？专业报表或者绘图板，遍历、定位、划线生成报表或自动绘图才行！

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