vc 控制項接收托拽檔案詳細說明

以Edit接收檔案為例

首先，edit屬性中accept files,mutiline兩項為true

.h檔案

#pragma once

// CDropEdit

class CDropEdit : public CEdit
{
DECLARE_DYNAMIC(CDropEdit)

public:
CDropEdit();
virtual ~CDropEdit();

protected:
afx_msg void OnDropFiles(HDROP hDropInfo);
CString strText;

DECLARE_MESSAGE_MAP()

};

.cpp

// DropEdit.cpp : 實現檔案
//

#include "stdafx.h"
#include "CMoveListBox.h"
#include "DropEdit.h"

// CDropEdit

IMPLEMENT_DYNAMIC(CDropEdit, CEdit)

CDropEdit::CDropEdit()
{
strText = "";
}

CDropEdit::~CDropEdit()
{
}

BEGIN_MESSAGE_MAP(CDropEdit, CEdit)
ON_WM_DROPFILES()
END_MESSAGE_MAP()

// CDropEdit 訊息處理常式

void CDropEdit::OnDropFiles(HDROP hDropInfo)
{
// TODO: 在此添加訊息處理常式代碼和/或調用預設值
UINT count;
char filePath[200];

count = DragQueryFile(hDropInfo, 0xFFFFFFFF, NULL, 0);
if(count)
{        
for(UINT i=0; i<count; i++)
{
GetWindowText(strText);
strText +="\r\n";
int pathLen = DragQueryFile(hDropInfo, i, filePath, sizeof(filePath));
strText +=filePath;

SetWindowText(strText);
}
}

SetWindowText(strText);
DragFinish(hDropInfo);

CEdit::OnDropFiles(hDropInfo);
}

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