剪贴板:复制并接收数组

Question

在Winform应用程序中，我有一个如下格式的数组：

浮动[][，]

我需要通过剪贴板将其复制到另一个Winform应用程序。我怎样才能做到这一点？感谢

Answer 1

简短回答：使用System.Windows.Forms.Clipboard很简单。

使用Clipboard.SetData("CustomDataName", nonStandardData);将自定义数据放在剪贴板上，使用var clipboardData = (float[][,])Clipboard.GetData("CustomDataName");将自定义数据从剪贴板中取出。您应该使用Clipboard.ContainsData("CustomDataName")检查剪贴板上的数据是否可用

注意：默认情况下，Windows剪贴板只包含一个条目一段时间；图像"文本"；或"；自定义数据"；。通过将剪贴板上的自定义数据剪贴板将不见了。

剪贴板最适合在不相关的程序，例如可以粘贴到网络浏览器或图像编辑器中的图像。csv值的网格，可以粘贴到不同的数据捕获和电子表格程序中。float[][,]对您的软件没有任何实际意义。

长答案(这里是一个例子(：

// A Format/"Type" name for your clipboard data
static readonly string JOE_SOAP_DATA_V1 = 
"JOE_SOAP_DATA_V1 {F1193E97-0B29-4ACD-935C-835A8EDFBB9D}";
// Some dummy data used to demonstrate
private readonly float[][,] JoeSoapData = new float[3][,]
{
new float[,]{{54,90},{34,56}},
new float[,]
{
{
// random values to create some variation
// will be different each time program is started
(float)new Random().NextDouble() * 2, 
(float)new Random().NextDouble() * 6  
},
{
(float)new Random().NextDouble() * 4,
(float)new Random().NextDouble() * 7
},
{
(float)new Random().NextDouble() * 4,
(float)new Random().NextDouble() * 7
}
},
new float[,]{{54,90},{34,56}}
};
private string JoeSoapDataToString(float[][,] data)
{
var sb = new StringBuilder();
foreach(var x in data)
{
foreach (var y in x)
sb.Append(y).Append(", ");
sb.Append('n');
}
return sb.ToString();
}
private void BtnCopyToClipboard_Click(object sender, EventArgs e)
{
// On button click add the dummy data to the clipboard
Clipboard.SetData(JOE_SOAP_DATA_V1, JoeSoapData);
}
private void BtnPasteFromClipboard_Click(object sender, EventArgs e)
{
// Check if the clipboard contains our unique Format and notify the user if it does not
if (!Clipboard.ContainsData(JOE_SOAP_DATA_V1))
{
MessageBox.Show($"No {nameof(JOE_SOAP_DATA_V1)} clipboard data found :(");
return;
}
// extract the clipboard data and show the user
var clipboardData = (float[][,])Clipboard.GetData(JOE_SOAP_DATA_V1);
// show the copied data
LblFromClipboard.Text = "Data from clipboardn" + JoeSoapDataToString(clipboardData);
}

private void Form1_Load(object sender, EventArgs e)
{
LblDataToCopy.Text = "Data that will be copied to the clipboardn"
+ JoeSoapDataToString(JoeSoapData);
}

Answer 2

您可以将AddClipboardFormatListener(用于侦听剪贴板更新消息(与clipboard类结合使用来复制数据。

接收器应用程序：

public partial class ReceiverAppMainForm : Form
{
public ReceiverAppMainForm()
{
InitializeComponent();
}
protected override void OnLoad(EventArgs e)
{
ClipboardWrapper.AddClipboardFormatListener(Handle);
base.OnLoad(e);
}
protected override void OnClosing(CancelEventArgs e)
{
ClipboardWrapper.RemoveClipboardFormatListener(Handle);
base.OnClosing(e);
}
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
if (m.Msg == ClipboardWrapper.WM_CLIPBOARDUPDATE)
{
var data = Clipboard.GetDataObject();
if (data != null && data.GetDataPresent("clipboard-demoapp-data"))
{
var array = (float[][,])data.GetData("clipboard-demoapp-data");
// TODO: use the shared data
}
}
}
internal static class ClipboardWrapper
{
[DllImport("user32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
internal static extern bool AddClipboardFormatListener(IntPtr hwnd);
[DllImport("user32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
internal static extern bool RemoveClipboardFormatListener(IntPtr hwnd);
internal const int WM_CLIPBOARDUPDATE = 0x031D;
}
}

发件人应用程序：

public partial class SenderAppMainForm : Form
{
// ... ignored for brevity
private static void CopyAppDataToClipboard(float[][,] data)
{
// variant #1 (to avoid duplication)
var dataObject = new DataObject();
dataObject.SetData("clipboard-demoapp-data", data);
Clipboard.SetDataObject(dataObject, false, 10, 100);
// variant #2 (the event is sending twice on my computer running Win10)
//Clipboard.SetData("cliboard-demoapp-data", data);
}
}