16,548
社区成员
发帖
与我相关
我的任务
分享GetBufferSetLength后需要ReleaseBuffer吗
GetBufferSetLength后需要ReleaseBuffer吗？比如
CString test="China";
test.GetBufferSetLength(3); 返回应该是Chi，这样的话，是否需要ReleaseBuffer吗？ 我知道GetBuffer后需要，
CString test="China";
test.GetBufferSetLength(3); 返回应该是Chi，这样的话，是否需要ReleaseBuffer吗？ 我知道GetBuffer后需要，
...全文
请发表友善的回复…
发表回复
MagicFuzzX 2011-06-12
- 打赏
- 举报
最好都realse下吧
MagicFuzzX 2011-06-12
- 打赏
- 举报
GetBuffer修改了缓冲区的数据就要Realse下，要是没修改的话不需要Realse
信阳毛尖 2011-06-12
- 打赏
- 举报
调用了GetBuffer或者GetBufferSetLength方法并且修改了缓冲区里的内容之后，如果要调用其它的方法，就要先调用ReleaseBuffer或者ReleaseBufferSetLength方法
kyotrue 2011-06-11
- 打赏
- 举报
不管是GetBufferSetLength还是GetBuffer，完了都必须要ReleaseBuffer。
DrSmart 2011-06-10
- 打赏
- 举报
晕，楼上有分歧，算了，我还是用Mid吧，就我这个情况，接下来test的不会变，如果用GetBufferSetLength到底用不用release啊，直接说明白，我也会google，就求真相
wocow3 2011-06-10
- 打赏
- 举报
CString有个成员专门保存了字符串的长度，所以一旦你直接操作并修改了字符串缓冲区，就必须调用ReleaseBuffer重新计算字符串长度更新这个成员
zyrr159487 2011-06-10
- 打赏
- 举报
LS说的很清楚了
Dreadnought 2011-06-10
- 打赏
- 举报
The address returned by GetBufferSetLength may not be valid after the call to ReleaseBuffer since additional CString operations may cause the CString buffer to be reallocated.
http://msdn.microsoft.com/en-us/library/aa300459(v=vs.60).aspx
http://msdn.microsoft.com/en-us/library/aa300459(v=vs.60).aspx
hurryboylqs 2011-06-10
- 打赏
- 举报
需要ReleaseBuffer
GetBuffer不一定需要，只要你不修改缓冲区数据
GetBuffer不一定需要，只要你不修改缓冲区数据
Eleven 2011-06-10
- 打赏
- 举报
If you use the pointer returned by GetBufferSetLength to change the string contents, you may need to call ReleaseBuffer before using any other CSimpleStringT member methods.
The address returned by GetBufferSetLength may not be valid after the call to ReleaseBuffer because additional CSimpleStringT operations can cause the CSimpleStringT buffer to be reallocated. The buffer is not reassigned if you do not change the length of the CSimpleStringT.
The address returned by GetBufferSetLength may not be valid after the call to ReleaseBuffer because additional CSimpleStringT operations can cause the CSimpleStringT buffer to be reallocated. The buffer is not reassigned if you do not change the length of the CSimpleStringT.
