MFC combox控件文本太长 如何换行显示

combox通过addstring("")添加内容，问题是，添加的各个选项的内容文字都很多，而在资源里的combox的长度不能再长了，如何让下拉的选项里的内容换行？ 
  
有什么方法可以实现？谢谢  必须自汇么？谁有源码给看下  

20 个解决方案

#1

http://blog.csdn.net/visualeleven/article/details/6072404

#2

开发环境是VS2010 

#3

不是可以用自绘实现吗，我也在找这和方法

#4

引用 1 楼 VisualEleven 的回复:

http://blog.csdn.net/visualeleven/article/details/6072404

你好 ，我试了下  程序运行到下面的地方时会报错，程序崩溃，为什么呢
CMulitLineListBox m_listBox; // 成员变量  
  
#define IDC_LISTBOX 0x11  
    CRect rc;  
    GetClientRect(&rc);  
    rc.bottom -= 35;  
    rc.DeflateRect(CSize(10, 10));  
     m_listBox.Create(WS_CHILD | WS_VISIBLE | WS_BORDER | WS_HSCROLL | WS_VSCROLL |  
        LBS_OWNERDRAWVARIABLE | LBS_HASSTRINGS, rc, this, IDC_LISTBOX); 

#5

引用 1 楼 VisualEleven 的回复:

http://blog.csdn.net/visualeleven/article/details/6072404

你好，这个是LISTBOX的  能给个Combox的吗   

#6

"文字都很多"
 多到什么程度 ？

#7

Quote: 引用 6 楼 schlafenhamster 的回复:

"文字都很多"
 多到什么程度 ？[/quote

200多字符

#8

“而在资源里的combox的长度不能再长了” 200 不算长吧

#9

在 资源中 加 数据 220 也没问题
“qaqaqaqaqaqaqaqaqaqaqaqaqaqaqaqaqaqasxcasdccccccccccccccccccccccccccccccccccccccccccasdawssssssssssssssssssaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxssssssssssssssssssszzzzzzzzzzzzzzaaaasdc”
这样也行  214 个
m_ComboTest.AddString("qaqaqaqaqaqaqaqaqaqaqewdfereterthgerthefgefertherewwwwwwwwwwwwwwwwwwwwcccccccccccccccwrtgerrgefrvgerfgezzzzzzzzzzzzzzzzqaqaqaqaqaqaqaqaqaqaqewdfereterthgerthefgefertherewrtgerrgefrvgerfgezzzzzzzzzzzzzzzzxxxx");
m_ComboTest.AddString("qaqaqaqaqaqaqaqaqaqaqyhertherthyrtujrnjyhjjerthqaqadddddddddddddddqaqaqaqaqaqaqaqaqewdfereterthgerthefgefertherewrtgerrgefrvgerfgezzzzzzzzzzzzzzzzgerthertheyhnyjnuyecevrghzzzzzddddddddddddddddddddzzzzzzzzzzz");

#10

引用 9 楼 schlafenhamster 的回复:

在 资源中 加 数据 220 也没问题
“qaqaqaqaqaqaqaqaqaqaqaqaqaqaqaqaqaqasxcasdccccccccccccccccccccccccccccccccccccccccccasdawssssssssssssssssssaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxssssssssssssssssssszzzzzzzzzzzzzzaaaasdc”
这样也行  214 个
m_ComboTest.AddString("qaqaqaqaqaqaqaqaqaqaqewdfereterthgerthefgefertherewwwwwwwwwwwwwwwwwwwwcccccccccccccccwrtgerrgefrvgerfgezzzzzzzzzzzzzzzzqaqaqaqaqaqaqaqaqaqaqewdfereterthgerthefgefertherewrtgerrgefrvgerfgezzzzzzzzzzzzzzzzxxxx");
m_ComboTest.AddString("qaqaqaqaqaqaqaqaqaqaqyhertherthyrtujrnjyhjjerthqaqadddddddddddddddqaqaqaqaqaqaqaqaqewdfereterthgerthefgefertherewrtgerrgefrvgerfgezzzzzzzzzzzzzzzzgerthertheyhnyjnuyecevrghzzzzzddddddddddddddddddddzzzzzzzzzzz");

200多个是没问题，我的问题是框体长度只能留100个字符的长度，太长了都显示到外面了   需要重载，让里面字符换行显示

#11

有一种叫 “TitleTip”（请搜索） 方法 可以 用 Tip 展开 combo 中的 内容

#12

1. http://blog.csdn.net/visualeleven/article/details/6072404
里 ‘'\' 写反了（/r/n)； 应该是 
strText = _T("Hello, World!\r\nHello, World!"); 
2. 有了这个 CMulitLineListBox 就 可以 把 combo 里 Listbox 替换 为 CMulitLineListBox

#13

另外即使 Combo 的 list 可以 多行， 那么 combo 的 edit 怎么 多行 ？

#14

引用 12 楼 schlafenhamster 的回复:

1. http://blog.csdn.net/visualeleven/article/details/6072404
里 ‘'\' 写反了（/r/n)； 应该是 
strText = _T("Hello, World!\r\nHello, World!"); 
2. 有了这个 CMulitLineListBox 就 可以 把 combo 里 Listbox 替换 为 CMulitLineListBox

这个帖子是CListBox的自绘   我需要CComboBox的自绘   把CListBox改为CComboBox的话，MeasureItem函数中的GetItemRect报错，不支持这个函数

#15

引用 11 楼 schlafenhamster 的回复:

有一种叫 “TitleTip”（请搜索） 方法 可以 用 Tip 展开 combo 中的 内容

你说的是Xtreme ToolkitPro吗  我找了  没有COMBO Box的啊

#16

"CComboBox的自绘"代码如下：

void CMulitLineComBox::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)  
{  
    if(lpDrawItemStruct->CtlType==ODT_COMBOBOX)  
    {  
        CDC dc;  
        dc.Attach(lpDrawItemStruct->hDC);  
        CRect rcClient = lpDrawItemStruct->rcItem;  
        UINT state = lpDrawItemStruct->itemState;  
        CBrush br;  
        if(state&ODS_SELECTED)  
        {  
            br.CreateSolidBrush(RGB(51,153,255));  
        }  
        else  
        {  
            br.CreateSolidBrush(RGB(255,255,128));
        }  
        dc.FillRect(&rcClient,&br);  
        dc.SetBkMode(TRANSPARENT);  
        dc.SetTextColor(RGB(255,0,255));  
        //如果不是空项  
        if(lpDrawItemStruct->itemID!=(UINT)-1)  
        {  
            UINT id = lpDrawItemStruct->itemID;  
            CString strText;  
            GetLBText(id,strText);  
            rcClient.DeflateRect(1,1);  
			dc.DrawText(strText, strText.GetLength(),&lpDrawItemStruct->rcItem, DT_WORDBREAK);  
        }  
        dc.Detach();  
    }  
}  
  
void CMulitLineComBox::MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct)  
{  
    if( (lpMeasureItemStruct->CtlType==ODT_COMBOBOX)&&  
        (lpMeasureItemStruct->itemID!=(UINT)-1))  
    {  
        CString strText;  
        GetLBText(lpMeasureItemStruct->itemID,strText);
		CRect rect(0,0,100,100);
	    CDC* pDC = GetDC();   
		lpMeasureItemStruct->itemHeight = pDC->DrawText(strText, -1, rect, DT_WORDBREAK | DT_CALCRECT);   
        ReleaseDC(pDC);  
    }  
}  

不过 选择到 edit 后 多行怎么办？

#17

引用 16 楼 schlafenhamster 的回复:

"CComboBox的自绘"代码如下：

void CMulitLineComBox::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)  
{  
    if(lpDrawItemStruct->CtlType==ODT_COMBOBOX)  
    {  
        CDC dc;  
        dc.Attach(lpDrawItemStruct->hDC);  
        CRect rcClient = lpDrawItemStruct->rcItem;  
        UINT state = lpDrawItemStruct->itemState;  
        CBrush br;  
        if(state&ODS_SELECTED)  
        {  
            br.CreateSolidBrush(RGB(51,153,255));  
        }  
        else  
        {  
            br.CreateSolidBrush(RGB(255,255,128));
        }  
        dc.FillRect(&rcClient,&br);  
        dc.SetBkMode(TRANSPARENT);  
        dc.SetTextColor(RGB(255,0,255));  
        //如果不是空项  
        if(lpDrawItemStruct->itemID!=(UINT)-1)  
        {  
            UINT id = lpDrawItemStruct->itemID;  
            CString strText;  
            GetLBText(id,strText);  
            rcClient.DeflateRect(1,1);  
			dc.DrawText(strText, strText.GetLength(),&lpDrawItemStruct->rcItem, DT_WORDBREAK);  
        }  
        dc.Detach();  
    }  
}  
  
void CMulitLineComBox::MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct)  
{  
    if( (lpMeasureItemStruct->CtlType==ODT_COMBOBOX)&&  
        (lpMeasureItemStruct->itemID!=(UINT)-1))  
    {  
        CString strText;  
        GetLBText(lpMeasureItemStruct->itemID,strText);
		CRect rect(0,0,100,100);
	    CDC* pDC = GetDC();   
		lpMeasureItemStruct->itemHeight = pDC->DrawText(strText, -1, rect, DT_WORDBREAK | DT_CALCRECT);   
        ReleaseDC(pDC);  
    }  
}  

不过 选择到 edit 后 多行怎么办？

换行这个我不会写。。。  那个用tooltip显示额外文本的代码你有吗  怎么给每个下拉项用tooltip添加文本？

#18

windows 使用 “回车 \r (0x0D return; 换行\n 0x0A newline”.

#19

http://read.pudn.com/downloads80/sourcecode/windows/dialog/310130/TitleTip.cpp__.htm

#20

已解决 多谢大家

#21

• 重绘ComBox控件实现换行 当文本达到一定长度时实现换行