将委托从 C# 转换为 vb.net
我在将 C# 委托转换为 VB.NET 时遇到问题。
这怎么能做到呢？
public MainForm()
{
InitializeComponent();
_twain = new Twain(new WinFormsWindowMessageHook(this));
_twain.TransferImage += delegate(Object sender, TransferImageEventArgs args)
{
if (args.Image != null)
{
pictureBox1.Image = args.Image;
widthLabel.Text = "Width: " + pictureBox1.Image.Width;
heightLabel.Text = "Height: " + pictureBox1.Image.Height;
}
};
_twain.ScanningComplete += delegate
{
Enabled = true;
};
}
I'm having trouble converting a C# delegate to VB.NET.
How can this be done?
public MainForm()
{
InitializeComponent();
_twain = new Twain(new WinFormsWindowMessageHook(this));
_twain.TransferImage += delegate(Object sender, TransferImageEventArgs args)
{
if (args.Image != null)
{
pictureBox1.Image = args.Image;
widthLabel.Text = "Width: " + pictureBox1.Image.Width;
heightLabel.Text = "Height: " + pictureBox1.Image.Height;
}
};
_twain.ScanningComplete += delegate
{
Enabled = true;
};
}
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评论（1）
这些方法似乎都没有在构造函数本身中使用任何上下文，因此我会将每个匿名方法转换为 VB 代码中的“正常”方法（这应该很简单），然后在构造函数中使用类似的
方法 ：应该与他们正在处理的事件具有相同的签名。
Neither of those methods seem to use any context in the constructor itself, so I would convert each anonymous method into a "normal" method in your VB code (which should be straightforward), and then use something like this in your constructor:
The methods should have the same signature as the events they're handling.