拖放在C＃Winforms应用程序中不起作用 [英] Drag and Drop not working in C# Winforms Application

问题描述

我正在尝试创建一个Windows窗体，可以在其中放置文件/文件夹。

I am trying to create a windows form onto which I can drop a file/folder.

我在WinForms应用中具有以下代码

I have the following code in a WinForms app

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_DragEnter(object sender, DragEventArgs e)
    {
        Debug.Print("DragEnter");
    }

    private void Form1_DragDrop(object sender, DragEventArgs e)
    {
        MessageBox.Show("Dropped!");
    }
}

我已将AllowDrop属性设置为true。
我尝试在Visual Studio中的调试中运行该应用程序。
基于对其他类似问题的回答，我尝试以管理员身份运行编译的exe。
我尝试以管理员身份运行编译的exe not 。

I have set the AllowDrop property to true. I've tried running the application in debug within Visual Studio. Based on answers to other similar questions, I've tried running the compiled exe as administrator. I've tried running the compiled exe not as administrator.

但是无论如何，我都无法获得DragDrop事件火。但是，将引发DragEnter事件 。我缺少什么？

But whatever I do, I cannot get the DragDrop event to fire. The DragEnter event does fire, however. What am I missing?

推荐答案

您的 DragDropEffect 设置正确吗？尝试将其放置在DragEnter事件处理程序方法中：

Is your DragDropEffect set appropriately? Try placing this in the DragEnter Event Handler Method:

    private void Form1_DragEnter(object sender, DragEventArgs e)
    {
        Console.WriteLine("DragEnter!");
        e.Effect = DragDropEffects.Copy;
    }

默认情况下，它设置为 DragDropEffects.None ，因此不会触发Drop事件。

By default it was set to DragDropEffects.None so the Drop event wouldn't fire.

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