📄 vbs131.htm

📁 VBScript 是一种脚本语言
💻 HTM
字号:
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"><HTML><HEAD><TITLE>IsDate Function</TITLE> 
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso8859-1">
<META NAME="MS.LOCALE" CONTENT="EN-US">
<META NAME="PRODUCT" CONTENT="Visual Basic Scripting Edition">
<META NAME="TECHNOLOGY" CONTENT="SCRIPTING">
<META NAME="CATEGORY" CONTENT="Language Reference">

<META NAME="Keywords" CONTENT="IsDate function,data validation,validating data,dates determining,determining Variant subtypes,Variant subtypes determining,dates,Variant subtypes"><META NAME="Description" CONTENT="IsDate Function"></HEAD><BODY BGCOLOR=FFFFFF LINK=#0033CC>
<!--TOOLBAR_START-->
<!--TOOLBAR_EXEMPT-->
<!--TOOLBAR_END-->
<FONT FACE="Verdana, Arial, Helvetica" SIZE=2>
<TABLE BORDER=0 CELLPADDING=0 CELLSPACING=0 WIDTH=100%><TR VALIGN=TOP><TD WIDTH=360>
<FONT SIZE=1 COLOR=#660033>Microsoft&#174; Visual Basic&#174; Scripting Edition</FONT><BR>
<FONT SIZE=5 COLOR=#660033><B>IsDate Function</B></FONT>

</TD>
<TD ALIGN=RIGHT>
<FONT SIZE=2>&nbsp;<A HREF="vbstoc.htm">Language&nbsp;Reference</A>&nbsp;<BR>
<A HREF="vbs16.htm">Version&nbsp;1</A>&nbsp;<P></FONT>
</TD></TR>
</TABLE> 

<FONT SIZE=2><P><A HREF="vbs132.htm">See Also</A></FONT>
<HR NOSHADE SIZE=1>

<H5>Description</H5>
<BLOCKQUOTE>Returns a Boolean value indicating whether an expression can be converted to a date.</BLOCKQUOTE>

<H5>Syntax</H5>
<BLOCKQUOTE><b>IsDate(</b><i>expression</i><b>)</b><P>
The <i>expression</i> argument can be any <A HREF="vbs0.htm#defDateExpression">date expression</A> or <A HREF="vbs0.htm#defStringExpression">string expression</A> recognizable as a date or time.</BLOCKQUOTE>

<H5>Remarks</H5>
<BLOCKQUOTE><b>IsDate</b> returns <b>True</b> if the expression is a date or can be converted to a valid date; otherwise, it returns <b>False</b>. In Microsoft Windows, the range of valid dates is January 1, 100 A.D. through December 31, 9999 A.D.; the ranges vary among operating systems.</BLOCKQUOTE>

<hr noshade size=1>
<p align=center><em><a href="../../common/colegal.htm">&copy; 1997 by Microsoft Corporation. All rights reserved.</a></em></p> 


</FONT></BODY></HTML>
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -