📄 dropdown_explain.aspx

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💻 ASPX
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<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.OleDb" %>
<%@ Import Namespace="System.Web" %>
<%@ Import Namespace="System.Web.UI" %>
<%@ Import Namespace="System.Web.UI.WebControls" %>

<HTML>
<script language="VB" runat="server">

Public DDLColumn(10) as string
Public CodeField(10) as string
Public DisplayField(10) as string
Public DDLSql(10) as string
Public s as String

Sub page_load(sender As Object, e As EventArgs)
	ParseDropDown
end sub

Sub set1_Click(Sender As Object, E As EventArgs)
	Dim i as integer
	i = GetDDLindex("1")
	s= "DDLColumn = " + DDLColumn(i)
	s = s + " CodeField=" +CodeField(i)
	s = s + " DisplayField=" +DisplayField(i)
	s = s + " DDLSQL=" +DDLSQL(i)
	response.write(s)

End Sub


Sub set2_Click(Sender As Object, E As EventArgs)
	Dim i as integer
	i = GetDDLindex("a")
	s= "DDLColumn = "  +DDLColumn(i)
	s = s + " CodeField=" +CodeField(i)
	s = s + " DisplayField=" +DisplayField(i)
	s = s + " DDLSQL=" +DDLSQL(i)
	response.write(s)
End Sub

Sub set3_Click(Sender As Object, E As EventArgs)
	Dim i as integer
	i = GetDDLindex("p")
	s= "DDLColumn = "  +DDLColumn(i)
	s = s + " CodeField=" +CodeField(i)
	s = s + " DisplayField=" +DisplayField(i)
	s = s + " DDLSQL=" +DDLSQL(i)
	response.write(s)

End Sub

Function GetDDLIndex(vDDLColumn as string) as integer
	'Pass in the column where a drop down list must apper
	' this function returns the row where its details are
	' stored in the array

	Dim i as integer, vKey as integer
	For i= 0 to UBound(DDlColumn)
	 If DDlColumn(i) = vDDLColumn
	  vKey = i
	 End if
	Next
	Return vKey
End Function

Function ParseDropDown()
	Dim strChar As Object
	Dim s As String
	Dim j As Integer
	Dim count As Integer
	Dim idx as integer
	count = 1
	idx = 0
	strChar = Split("1;2;3;4;a;b;c;d;p;q;r;s;", ";")

     	For j = 0 To UBound(strChar)
          If Len(strChar(j)) = 0 Then
            Else
              s = CStr(strChar(j))
              
             	 If count = 1 then
             	
             		DDLColumn(idx) = s
              
              	 Elseif count = 2 then
              		
              		CodeField(idx) = s
              		
              	 elseif count = 3 then
              	 	
              	 	DisplayField(idx) = s
              
              	 elseif count = 4 then
              	 
              	 	DDLSql(idx) = s
              	 	count = 0
              	 	idx = idx + 1
              	 
              	           	 	
              	End if
             	count = count + 1 
                
             End If
        Next
End Function





</script>
<form runat = "server" >
<BODY>
 <asp:button text="Set1(1;2;3;4)" Onclick="set1_Click" runat=server/>
  <asp:button text="Set2(a;b;c;d)" Onclick="set2_Click" runat=server/>
  <asp:button text="Set3(p;q;r;s)" Onclick="set3_Click" runat=server/>
</form>
</BODY>
</HTML>
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