技术资料 > ASP技术 > ASP应用 : 一个不需要第三方组件，可实现华简单图形的类

一个不需要第三方组件，可实现华简单图形的类

March 25,2004

通常我们做统计图的时候需要借助组件来完成例如mschart,aspchart等
但是这个类不需要任何组件，而且使用方便
clsGraph.asp
<%
Class InteliGraph

      Public Copyright, Developer, Name, Version, Web
      Public Maximum, BarWidth, BarColor, Orientation
      Private Items(), Cnt

      Private Sub Class_Initialize()
         Copyright = "?2001 Ticluse Teknologi, All rights reserved."
         Developer = "James Lind雗"
         Name = "InteliGraph"
         Version =  "1.0"
         Web = "http://www.intelidev.com"
         Cnt = 0
      End Sub

      Public Function Add( value )
         ReDim Preserve Items( Cnt )
         Items( Cnt ) = value
         data = Cnt
         Cnt = Cnt + 1
         Add = data
      End Function

      Public Function Build()
         If Cnt < 1 Then Exit Function
         If Len( Orientation ) = 0 Or LCase( Orientation ) = "horizontal" Then
            For Idx = LBound( Items ) To UBound( Items )
                  data = data & "<table height=" & BarWidth & " border=1 width=" & Maximum & " cellspacing=2>" & vbNewLine
                  data = data & vbTab & "<tr><td width=" & Items(Idx) & " bgcolor=" & BarColor & " align=center><font size=-4> </font></td>"
                  If Items(Idx) < Maximum Then
                     data = data & "<td width=" & Maximum - Items(Idx) & "></td>"
                  End If
                  data = data & "</tr>" & vbNewLine & "</table>" & vbNewLine
            Next
         ElseIf LCase( Orientation ) = "vertical" Then
            data = "<table><tr>" & vbNewLine
            For Idx = LBound( Items ) To UBound( Items )
                  data = data & "<td><table width=" & BarWidth & " border=1 height=" & Maximum & " cellspacing=2>" & vbNewLine
                  If Items(Idx) < Maximum Then
                     data = data & "<tr><td height=" & Maximum - Items(Idx) & "></td></tr>"
                  End If
                  data = data & vbTab & "<tr><td height=" & Items(Idx) & " bgcolor=" & BarColor & " align=center><font size=-4> </font></td>"
                  data = data & "</tr>" & vbNewLine & "</table>" & vbNewLine & "</td>" & vbNewLine
            Next
            data = data & "</tr></table>" & vbNewLine
         End If
         Build = data
      End Function

End Class
%>
使用方法
这个类一共有四个属性
BarWidth（图片条的尺寸）
BarColor*(图片条颜色)
Maximum（图片条最大长度）
Orientation（方向）
有两个函数
Add( value ）添加图片条到图片中
Build()建立图片
事例：

<%
Public Const vert = "vertical"
Public Const horz = "horizontal"

Dim Graph

Set Graph = New InteliGraph
Graph.BarWidth = 10
Graph.BarColor = "blue"
Graph.Maximum = 100
Graph.Orientation = horz

For Idx = 0 To 100 Step 25
  Graph.Add( Idx )
Next

Response.Write( Graph.Build() )
%>