<%
REM 首先我们设计一个ShowCart函数，其中
REM aValues 是一个数值数组
REM aLables 是横坐标的标号
REM strTitle是这个统计图的标题
REM strXAxisLable X轴的标签
REM strYAxisLable Y轴的标签
Sub ShowChart(ByRef aValues, ByRef aLabels, ByRef strTitle, ByRef strXAxisLabel, ByRef strYAxisLabel)
" 你可以随便改变的图形常数
" 单位是屏幕像素点
Const GRAPH_WIDTH = 450 " 图形宽度
Const GRAPH_HEIGHT = 250 " 图形
Const GRAPH_BORDER = 5 " 坐标线宽度
Const GRAPH_SPACER = 2 " 统计条之间的距离
Const TABLE_BORDER = 0
" 变量声明
Dim I
Dim iMaxValue
Dim iBarWidth
Dim iBarHeight
" 取得aValues最大值
iMaxValue = 0
For I = 0 To UBound(aValues)
If iMaxValue < aValues(I) Then iMaxValue = aValues(I)
Next "I
" 计算每条图形的宽度
iBarWidth = (GRAPH_WIDTH \ (UBound(aValues) + 1)) - GRAPH_SPACER
" 开始绘图
%>
<TABLE BORDER="<%= TABLE_BORDER %>" CELLSPACING="0" CELLPADDING="0">
<TR>
<TD COLSPAN="3" ALIGN="center"><H2><%= strTitle %></H2></TD>
</TR>
<TR>
<TD VALIGN="center"><B><%= strYAxisLabel %></B></TD>
<TD VALIGN="top">
<TABLE BORDER="<%= TABLE_BORDER %>" CELLSPACING="0" CELLPADDING="0">
<TR>
<TD ROWSPAN="2"><IMG SRC="./images/spacer.gif" BORDER="0" WIDTH="1" HEIGHT="<%= GRAPH_HEIGHT %>"></TD>
<TD VALIGN="top" ALIGN="right"><%= iMaxValue %> </TD>
</TR>
<TR>
<TD VALIGN="bottom" ALIGN="right">0 </TD>
</TR>
</TABLE>
</TD>
<TD>
<TABLE BORDER="<%= TABLE_BORDER %>" CELLSPACING="0" CELLPADDING="0">
<TR>
<TD VALIGN="bottom"><IMG SRC="./images/spacer_black.gif" BORDER="0" WIDTH="<%= GRAPH_BORDER %>" HEIGHT="<%= GRAPH_HEIGHT %>"></TD>
<%
" 对数组所有数值进行循环，绘制条形图!
For I = 0 To UBound(aValues)
iBarHeight = Int((aValues(I) / iMaxValue) * GRAPH_HEIGHT)
" 因为浏览器会忽略0高度的条形图，所以用1代替!
If iBarHeight = 0 Then iBarHeight = 1
%>
<TD VALIGN="bottom"><IMG SRC="./images/spacer.gif" BORDER="0" WIDTH="<%= GRAPH_SPACER %>" HEIGHT="1"></TD>
<TD VALIGN="bottom"><IMG SRC="./images/spacer_red.gif" BORDER="0" WIDTH="<%= iBarWidth %>" HEIGHT="<%= iBarHeight %>" ALT="<%= aValues(I) %>"></A></TD>
<%
Next "I
%>
</TR>
<TR>
<TD COLSPAN="<%= (2 * (UBound(aValues) + 1)) + 1 %>"><IMG SRC="./images/spacer_black.gif" BORDER="0" WIDTH="<%= GRAPH_BORDER + ((UBound(aValues) + 1) * (iBarWidth + GRAPH_SPACER)) %>" HEIGHT="<%= GRAPH_BORDER %>"></TD>
</TR>
<% " 检查横坐标数组是否有效! %>
<% If IsArray(aLabels) Then %>
<TR>
<TD><!-- 留点空间 --></TD>
<% For I = 0 To UBound(aValues) %>
<TD><!-- 留点空间 --></TD>
<TD ALIGN="center"><FONT SIZE="1"><%= aLabels(I) %></FONT></TD>
<% Next "I %>
</TR>
<% End If %>
</TABLE>
</TD>
</TR>
<TR>
<TD COLSPAN="2"><!-- 使下一个TD元素居中--></TD>
<TD ALIGN="center"><BR><B><%= strXAxisLabel %></B></TD>
</TR>
</TABLE>
<%
End Sub
%>
<%
" 一个带有横坐标的条形图
ShowChart Array(6, 10, 12, 18, 23, 26, 27, 28, 30, 34, 37, 45, 55), _
Array("P1", "P2", "P3", "P4", "P5", "P6", "P7", "P8", "P9", _
"P10", "P11", "P12", "P13"), "连续几个月的销售额", "X 轴", "Y 轴"
" 空行
Response.Write "<BR>" & vbCrLf
Response.Write "<BR>" & vbCrLf
Response.Write "<BR>" & vbCrLf
" 构造一个由随机数组成的数组
Dim I
Dim aTemp(49)
Randomize
For I = 0 to 49
aTemp(I) = Int((50 + 1) * Rnd)
Next "I
" 由随机数组生成的条形图
ShowChart aTemp, "这不是一个数组!", "随机条形图", "序号", "随机数"
%> （出处：http://www.vipcn.com）
|
精品推荐