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47IT技术

vb6.0程序移植到VB.NET后提示“未声明变量“Vaptr””讲了一堆 ， 看的头晕，勉强看懂了，能不能好好表达自己的问题啊 。废话一堆，其实有个标题就好了 。vb.net不再使用VarPtr来返回变量的地址了，其实是net不提倡使用指针和地址 。
net有了一个新的叫做托管的概念，建议了解一下，net里面的变量地址都是不确定的，生存周期也不确定 ， 是由托管机制来管理内存，程序员不必再纠结于内存的管理而浪费精力 。
解决方法：可以使用byref声明为整型变量直接将变量地址传过去就好，不用声明为什么指针的 。
或者可以试试下面这个：
GCHandle类的AddressOfPinnedHandle方法可以提供类似的功能.
vb.net 怎么调用cmd执行多行语句shell "cmd /c dir c:\*.*",1
msgbox("执行完毕")
另外CMD窗口是无法隐藏执行的，当然，你可以换另外一个思路，就是启用一个新线程，然后将线程后台执行CMD语句，这样前台就看不到CMD窗口了
请参考下面的示例
shell "cmd /c dir",1'/c表示执行完即关闭窗口
shell "cmd /k dir",1'/k表示执行完停留
shell "cmd /c dirpause",1'多条语句可用连接
关于cmd的具体用法可以在命令提示符下敲入cmd/?看看
太多了 ， 只列举一些典型的：
CMD [/A | /U] [/Q] [/D] [/E:ON | /E:OFF] [/F:ON | /F:OFF] [/V:ON | /V:OFF]
[[/S] [/C | /K] string]
/C执行字符串指定的命令然后终断
/K执行字符串指定的命令但保留
/S在 /C 或 /K 后修改字符串处理(见下)
/Q关闭回应
/D从注册表中停用执行 AutoRun 命令(见下)
/A使向内部管道或文件命令的输出成为 ANSI
/U使向内部管道或文件命令的输出成为 Unicode
/T:fg设置前景/背景颜色(详细信息，请见 COLOR /?)
/E:ON启用命令扩展(见下)
/E:OFF停用命令扩展(见下)
/F:ON启用文件和目录名称完成字符 (见下)
/F:OFF停用文件和目录名称完成字符(见下)
/V:ON将 ! 作为定界符启动延缓环境变量扩展 。如: /V:ON 会
允许 !var! 在执行时允许 !var! 扩展变量 var 。var 语法
在输入时扩展变量，这与在一个 FOR 循环内不同 。
/V:OFF停用延缓的环境扩展 。
网页高手来看看我查了下代码、用的是.NET
A href="https://www.04ip.com/Member.aspx?id=23002" target=_blank福建省人民政府第九办公室厦门工作站/ANOBR[A style="COLOR: blue" onclick="voidZoomToPoint('厦门市全部特征点','23002')" href="https://www.04ip.com/post/#"地图/A
这是js 。被加密了 。你看看 。
SCRIPT language=JavaScript
//定位到特征对象
void function voidZoomToPoint(sLayer, sFid) {
voidZoomToFeature("point", sLayer, sFid);
}
//定位到特征对象
void function voidZoomToFeature(sType, sLayer, sFid) {
var strExpression = "g_oWebGisClnt.doMapChange('zoomtofeature', '"sType";"sLayer";"sFid";true;true', false)";
window.opener.voidExecScriptAtMain(strExpression);
}
//定位到特征对象
void function voidZoomToFeatureByName(sLayer, sName) {
var strExpression = "g_oWebGisClnt.doMapChange('zoomtofeaturebyname','"sLayer";"sName";true;true;true')"
window.opener.voidExecScriptAtMain(strExpression);
}
//测试是否整数
function testNumInput(input) {
if(!isNaN(input)) {
if(!/\D/.test(input)) {
return true;
} else {//小数
return false;
}
}
else {//非数字
return false;
}
}
function blnOnFormSubmit(oForm)
{
var sLine = oForm.txtPageSize.value.trim();
if (sLine == "")
{
window.alert("请输入行数 。行数应为10－200之间的整数");
return false;
}
else if (!testNumInput(sLine))
{
window.alert("请输入10-200之间的整数");
return false;
}
else if ((sLine10) || (sLine200))
{
window.alert("行数应为10－200之间的整数");
return false;
}
var sKey = oForm.txtKey.value;
if (!sKey.testSqlInput())
{
window.alert("您输入的查询关键字包含非法字符，请重新输入！");
return false;
}
return true;
}
/SCRIPT
SCRIPT language=JavaScript event=onkeydown for=txtKey
if (13 == event.keyCode) {
window.document.forms["Catalog"].btnKey.focus();
}
/SCRIPT
SCRIPT language=JavaScript event=onkeydown for=txtPageSize
if (13 == event.keyCode) {
window.document.forms["Catalog"].btnPageSize.focus();
}
/SCRIPT
/HEAD
BODY onclick="" bottomMargin=0 leftMargin=0 topMargin=0 rightMargin=0 ms_positioning="GridLayout"
FORM id=Catalog name=Catalog onsubmit="return blnOnFormSubmit(this);" action=List.aspx?code=a05 method=postINPUT type=hidden name=__EVENTTARGET INPUT type=hidden name=__EVENTARGUMENT INPUT type=hidden value=https://www.04ip.com/post/dDw3Mjg0NTQ1Njt0PDtsPGk8MD47PjtsPHQ8O2w8aTwwPjtpPDE O2k8Mj47aTwzPjtpPDQ O2k8NT47aTwxMj47PjtsPHQ8cDxwPGw8VGV4dDs O2w85YWx5pyJXDxiXD4zN1w8L2JcPumhueespuWQiFw8Ylw XDwvYlw 55qE5p l6K i57uT5p6c77yM5Lul5LiL5pivXDxiXD4xLTEwXDwvYlw 6aG544CCOz4 Oz47Oz47dDxAMDw7Ozs7Ozs7Ozs7Pjs7Pjt0PEAwPDs7Ozs7Ozs7Ozs Ozs O3Q8QDA8Ozs7Ozs7Ozs7Oz47Oz47dDxAMDxwPHA8bDxBbGxvd1BhZ2luZztQYWdlQ291bnQ7UGFnZVNpemU7QXV0b0dlbmVyYXRlQ29sdW1ucztBbGxvd0N1c3RvbVBhZ2luZztfIURhdGFTb3VyY2VJdGVtQ291bnQ7XyFJdGVtQ291bnQ7VmlydHVhbEl0ZW1Db3VudDtEYXRhS2V5cztDdXJyZW50UGFnZUluZGV4Oz47bDxvPHQ O2k8ND47aTwxMD47bzxmPjtvPHQ O2k8Mzc O2k8MTA O2k8Mzc O2w8PjtpPDA Oz4 Oz47O3A8bDxQYWdlQnV0dG9uQ291bnQ7UGFnZXJWaXNpYmxlO01vZGU7XyFTQjs 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SCRIPT language=javascript type=text/javascript
!--
function __doPostBack(eventTarget, eventArgument) {
var theform;
if (window.navigator.appName.toLowerCase().indexOf("microsoft")-1) {
theform = document.Catalog;
}
else {
theform = document.forms["Catalog"];
}
theform.__EVENTTARGET.value = https://www.04ip.com/post/eventTarget.split("$").join(":");
theform.__EVENTARGUMENT.value = https://www.04ip.com/post/eventArgument;
theform.submit();
}
// --
/SCRIPT
VB.NET 正则表达式 日期var reg = /(.{4}年.{2}月.{2}日|.{2}年.{2}月.{2}日|[^\-]{2}\-[^\-]{2}|[^\/]{2}\/[^\/]{2}|[^\\]{2}\\[^\\]{2})/g;
var str = "sdfasf****年**月**日 ， **年**月**日 ， **-**，**/**，**\**asdfadf";
str.match(reg);
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