📄 command_paramcount.html
字号:
<html><head><meta name="KEYWORDS" content=" library, C++, Oracle, SQLServer, DB2, Sybase, Informix, InterBase, SQLBase, ODBC,
SQL, server, client, database, programming, development, software,
Win32, Windows, Linux, Unix, Solaris,
Microsoft, Borland, Centura, Gupta, IBM"><meta name="DESCRIPTION" content=
"SQLAPI++ is C++ library for accessing SQL databases (Oracle, SQLServer, Sybase, DB2, InterBase, SQLBase, Informix, ODBC).
It uses native APIs, provides low-level access to database-specific features."><title>SQLAPI++ Library - Online Documentation - SACommand::ParamCount</title></head><body bgcolor="#ffffff" BACKGROUND="../images/bg.gif" text="#000000"><!--GlbHdr--> <table WIDTH=600 height=40 frame=hsides BORDER="2" BORDERCOLOR="#004fcd" align="right" cellpadding="0" cellspacing="2" id="TABLE1">
<tr><!--class="GlbDefault"-->
<td width=70 bgcolor=#000094 bordercolor=black align=middle><A href="../index.html" style="TEXT-DECORATION: none" >
<font color=white size=3 face=sans-serif>
<b>Home</b></font></A></td></TD>
<td width=70 bgcolor=#000094 bordercolor=black align=middle><A href="../HowTo/index.html" style="TEXT-DECORATION: none" > <font color=white size=3
face=sans-serif>
<b>How To</b></font></A></td><!--class="GlbActive"-->
<td width=70 bgcolor=#00bb00 bordercolor=black align=middle><A href="../OnLineDoc/index.html" style="TEXT-DECORATION: none" > <font color=white size=3
face=sans-serif>
<b>Online Documentation</b></font></A></td><!--class="GlbDefault"-->
<td width=70 bgcolor=#000094 bordercolor=black align=middle><A href="../Support/index.html" style="TEXT-DECORATION: none" > <font color=white size=3
face=sans-serif>
<b>Support</b></font></A></td>
<td width=70 bgcolor=#000094 bordercolor=black align=middle>
<A href="../Download/index.html" style="TEXT-DECORATION: none" >
<font color=white size=3
face=sans-serif>
<b>Download</b></font></A></td>
<td width=70 bgcolor=#000094 bordercolor=black align=middle><A href="../Order/index.html" style="TEXT-DECORATION: none" > <font color=white size=3
face=sans-serif>
<b>Order</b></font></A></td> </tr>
</table>
<p> </p>
<table width="100%">
<tr>
<td valign=top width=165><!--LeftMenu-->
<table frame=void CELLSPACING=5 width=165>
<tr><td><p> </p></td>
</tr>
<tr>
<td><img align=middle src="../images/red.gif" WIDTH="12" HEIGHT="12"> <A href="Command.html" style ="TEXT-DECORATION: none" >
<font color=white size=2 face=sans-serif>
SACommand</A> </FONT> </td>
</tr>
<tr>
<td><img align=middle src="../images/green.gif" WIDTH="12" HEIGHT="12"> <A href="Connection.html" style ="TEXT-DECORATION: none" >
<font color=white size=2 face=sans-serif>
SAConnection</A> </FONT> </td>
</tr>
<tr>
<td><img align=middle src="../images/green.gif" WIDTH="12" HEIGHT="12"> <A href="Exception.html" style ="TEXT-DECORATION: none" >
<font color=white size=2 face=sans-serif>
SAException</font></A> </td>
</tr>
<tr>
<td><img align=middle src="../images/green.gif" WIDTH="12" HEIGHT="12"> <A href="Field.html" style ="TEXT-DECORATION: none" >
<font color=white size=2 face=sans-serif>
SAField</A> </FONT> </td>
</tr>
<tr>
<td><img align=middle src="../images/green.gif" WIDTH="12" HEIGHT="12"> <A href="Param.html" style ="TEXT-DECORATION: none" >
<font color=white size=2 face=sans-serif>
SAParam</A> </FONT> </td>
</tr>
<tr><td><hr></td></tr>
<tr>
<td><img align=middle src="../images/green.gif" WIDTH="12" HEIGHT="12">
<A href="String.html" style ="TEXT-DECORATION: none" >
<font color=white size=2 face=sans-serif>
SAString</A> </FONT> </td>
</tr>
<tr>
<td><img align=middle src="../images/green.gif" WIDTH="12" HEIGHT="12">
<A href="DateTime.html" style ="TEXT-DECORATION: none" >
<font color=white size=2 face=sans-serif>
SADateTime</A> </FONT> </td>
</tr>
</table>
</td><!--empty column-->
<td width=20>
<p> </p>
</td><!--Content-->
<td valign=top align=left>
<table width="100%" cellspacing=2 cellpadding=2>
<tr>
<td align=left > <A href="Command_Usage.html" style ="TEXT-DECORATION: none"><h3>Usage</h3></A>
</td>
<td align=left > <A href="Command.html" style ="TEXT-DECORATION: none"><h3>Class Members</h3></A>
</td>
<td align=left > <A href="Command_Examples.html#ParamCount" style ="TEXT-DECORATION: none"><h3>Examples</h3></A>
</td>
</tr>
<tr>
<td colspan=3><h1>SACommand::ParamCount</h1></td>
</tr>
</table>
<P><font face="Arial"><B>int ParamCount( );<BR>throw
(SAException);</B></font></P>
<P>Returns the number of parameters associated
with the <STRONG>SACommand</STRONG> object.
</P>
<h3>Remarks</h3>
<P><STRONG>ParamCount</STRONG>
method returns
the number of parameters created explicitly by using <A
href="Command_CreateParam.html">CreateParam</A>
method or (if parameters were not created before) creates them
implicitly (can query native API if needed and therefore can throw
exception on
error) and returns the number of created parameters.
</P>
<P>Command parameter is represented by
<STRONG>SAParam</STRONG> object. You can look
<STRONG>SAParam</STRONG>
objects through and assign their values
with <A href="Command_Param.html" >Param</A>
and
<A href="Command_ParamByIndex.html" >ParamByIndex</A>
methods. Values for the
input parameters can also be supplied by <A
href="Command_operator_bind.html"
>operator <<</a>
.
</P>
<H3>Server specific notes</H3>
<P>No specific information.</P>
<H3>See also</H3>
<P> <A href="Command_setCommandText.html">setCommandText</A>,
<A href="Command_CreateParam.html" target="" >CreateParam</A>, <A
href="Command_Param.html">Param</A>,
<A
href="Command_ParamByIndex.html">ParamByIndex</A>
</P>
<P> <A href="Param.html" >SAParam</A>
</P>
<p><A href="../HowTo/errors.html" >Error
handling</A> </p>
<H3>Problems and Questions</H3>
<P> If
you don't find the answer to you questions or
have some problems on using the Library, please, send e-mail to <A
href="mailto:howto@sqlapi.com">howto@sqlapi.com</A>.
</P>
</td>
<tr></tr>
</table>
</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 + -