edit控件实现拖拽

1、c++版 cedit控件

.h

#pragma once
#include "afxwin.h"

// CMyEdit

class CMyEdit : public CEdit
{
 DECLARE_DYNAMIC(CMyEdit)

public:
 CMyEdit();
 virtual ~CMyEdit();

protected:
 DECLARE_MESSAGE_MAP()

public:
 afx_msg void OnDropFiles(HDROP hDropInfo);

};

 

.cpp

// MyEdit.cpp : 实现文件
//

#include "stdafx.h"
#include "MyEdit.h"

// CMyEdit

IMPLEMENT_DYNAMIC(CMyEdit, CEdit)

CMyEdit::CMyEdit()
{
}

CMyEdit::~CMyEdit()
{
}

BEGIN_MESSAGE_MAP(CMyEdit, CEdit)
 ON_WM_DROPFILES()
END_MESSAGE_MAP()

 

// CMyEdit 消息处理程序

void CMyEdit::OnDropFiles(HDROP hDropInfo)
{
 if (hDropInfo)
 {
  CString strPath;
  int nDrag = 0; //拖拽文件的数量
  nDrag = DragQueryFile(hDropInfo, 0xFFFFFFFF, NULL, 0);
  
  for (int i = 0; i < nDrag; i++)
  {
   // 被拖拽的文件的文件名
   TCHAR Path[MAX_PATH + 1] = { 0 };

   int len = DragQueryFile(hDropInfo, i, Path, MAX_PATH);
   // 得到被拖拽的文件名与长度
   
   CString str = Path;
   CString xml = _T(".xml");
   CString fix = str.Mid(len - 4, 4);
   if (fix.CompareNoCase(xml) == 0)
   {
    strPath += Path;
    strPath += _T("\r\n");
   }
  }
  
  SetWindowText(strPath);
 }
 DragFinish(hDropInfo);
 CEdit::OnDropFiles(hDropInfo);
}

2、c#版 textBox控件

textBoxRePath.DragDrop += textBoxRePath_DragDrop;

 

/// <summary>
        /// 拖拽事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void textBoxRePath_DragDrop(object sender, DragEventArgs e)
        {
            string path = ((System.Array)e.Data.GetData(DataFormats.FileDrop)).GetValue(0).ToString();//GetValue(0) 为第1个文件全路径
            if (string.Compare(Path.GetExtension(path), ".xml", true) == 0)
            {
               textBoxRePath.Text = path;
            }
            this.textBoxRePath.Cursor = System.Windows.Forms.Cursors.IBeam; //还原鼠标形状
        }