CList GetNext() 访问冲突

[LJJComeOn]

CString code=str.Mid(8,4);
CString tempstr;
POSITION vpos=tempStr.GetHeadPosition();
while(vpos!=NULL)
{
tempstr=tempStr.GetNext(vpos); CString codes=tempstr.Mid(0,4);
if (0==code.Compare(codes))
{
strlist[m].AddTail(str);
break;
}
}

循环到第二次时发生访问冲突。

[向立天]

单步跟踪一下
看看变量值的变化

[LJJComeOn]

CList<CString,CString> tempStr;
long m;
int count=0;
POSITION testpos;
for(int i=4;i<=20;i++)
{
str=(CString)range.GetItem(COleVariant(long(i)),COleVariant(long(3)));
m=strtol((char*)(str.GetBuffer(0)),NULL,10);
if(m>0)
{
strs=range.GetItem(COleVariant(long(i)),COleVariant(long(2)));
strs+=",";
strs+=range.GetItem(COleVariant(long(i)),COleVariant(long(1)));
strs+=",";
strs+=str;
testpos=tempStr.AddTail(strs);
++count;
}
}
单步跟踪了vpos的值和原来的temppos的值都是一样的啊！

[VC_ZSY]

第二次时是不是得到的tempstr长度小于4啊

[LJJComeOn]

tempstr=tempStr.GetNext(vpos);
运行词句第一次没有问题，取出的值也正常，运行第二次报错
完整代码如下
CString str,strs;
CList<CString,CString> tempStr;
long m;
int count=0;
POSITION testpos;
for(int i=4;i<=20;i++)
{
str=(CString)range.GetItem(COleVariant(long(i)),COleVariant(long(3)));
m=strtol((char*)(str.GetBuffer(0)),NULL,10);
if(m>0)
{
strs=range.GetItem(COleVariant(long(i)),COleVariant(long(2)));
strs+=",";
strs+=range.GetItem(COleVariant(long(i)),COleVariant(long(1)));
strs+=",";
strs+=str;
testpos=tempStr.AddTail(strs);
++count;
}
}


//统计制卡文件
CList<CString,CString> *strlist;
strlist=new CList<CString,CString>[count];
CStdioFile iofile;
CString filename;
for (int k=0;k<m_ListBox.GetCount();k++)
{
m_ListBox.GetText(k,filename.GetBuffer(0));
iofile.Open(filename,CStdioFile::modeRead);
CString str;
while (iofile.ReadString(str))
{
CString code=str.Mid(8,4);
CString tempstr;
POSITION vpos=tempStr.GetHeadPosition();
for(int m=0;m<count;m++)
{
tempstr=tempStr.GetNext(vpos);
CString codes=tempstr.Mid(0,4);
if (0==code.Compare(codes))
{
strlist[m].AddTail(str);
break;
}
}
}
iofile.Close();
}

[LJJComeOn]

CString str,strs;
CList<CString,CString> tempStr;
long m;
int count=0;
POSITION testpos;
for(int i=4;i<=20;i++)
{
str=(CString)range.GetItem(COleVariant(long(i)),COleVariant(long(3)));
m=strtol((char*)(str.GetBuffer(0)),NULL,10);
if(m>0)
{
strs=range.GetItem(COleVariant(long(i)),COleVariant(long(2)));
strs+=",";
strs+=range.GetItem(COleVariant(long(i)),COleVariant(long(1)));
strs+=",";
strs+=str;
testpos=tempStr.AddTail(strs); ++count;
}
}
testpos=NULL;


//统计制卡文件
CList<CString,CString> *strlist;
strlist=new CList<CString,CString>[count];
CStdioFile iofile;
CString filename;
for (int k=0;k<m_ListBox.GetCount();k++)
{
m_ListBox.GetText(k,filename.GetBuffer(0));
iofile.Open(filename,CStdioFile::modeRead);
CString str;
while (iofile.ReadString(str))
{
CString code=str.Mid(8,4);
CString tempstr;
POSITION vpos=tempStr.GetHeadPosition();
for(int m=0;m<count;m++)
{
tempstr=tempStr.GetNext(vpos); CString codes=tempstr.Mid(0,4);
if (0==code.Compare(codes))
{
strlist[m].AddTail(str);
break;
}
}
}
iofile.Close();
}