' Copyright 2011 ESRI
' 
' All rights reserved under the copyright laws of the United States
' and applicable international laws, treaties, and conventions.
' 
' You may freely redistribute and use this sample code, with or
' without modification, provided you include the original copyright
' notice and use restrictions.
' 
' See the use restrictions.
' 

Imports Microsoft.VisualBasic
Imports System
Namespace CustomTools
  ' Shows how to retrieve arguments from callbacks and postbacks
  Public Class CustomArgumentsTool
        Implements ESRI.ArcGIS.ADF.Web.UI.WebControls.Tools.IMapServerToolAction
    #Region "IMapServerToolAction Members"

    Private Sub ServerAction(ByVal toolEventArgs As ESRI.ArcGIS.ADF.Web.UI.WebControls.ToolEventArgs) Implements ESRI.ArcGIS.ADF.Web.UI.WebControls.Tools.IMapServerToolAction.ServerAction
      Dim nameValueCollectionInsideArg As System.Collections.Specialized.NameValueCollection = Nothing

      ' Check whether the page request was issued using a callback or a postback.  A callback is used if no
      ' ScriptManager is on the page containing the tool.  Otherwise, a partial postback is used.
      If toolEventArgs.Control.Page.IsCallback Then
        ' Get the callback arguments from the __CALLBACKPARAM argument of the page request parameters
        Dim callbackArguments As String = toolEventArgs.Control.Page.Request.Params("__CALLBACKPARAM")
        nameValueCollectionInsideArg = ESRI.ArcGIS.ADF.Web.UI.WebControls.CallbackUtility.ParseStringIntoNameValueCollection(callbackArguments)

        ' Get the value of the DropDownList1 server control, which has been manually added to the tool's
        ' arguments via JavaScript in AddArgumentsToTool.aspx
        Dim dropDownListValue As String = nameValueCollectionInsideArg("DropDownList1")

        ' Get the value of the custom argument created via JavaScript in AddArgumentsToTool.aspx
        Dim inlineValue As String = nameValueCollectionInsideArg("inlineArgument")
      Else
        ' Get the value of the DropDownList1 server control, which is automatically included in postbacks
        ' (partial postbacks included) due to its being a server control
        Dim dropDownListValue As String = toolEventArgs.Control.Page.Request.Params("DropDownList1")

        ' Get the postback event arguments from the __EVENTARGUMENT argument of the page request parameters
        Dim postbackEventArguments As String = toolEventArgs.Control.Page.Request.Params("__EVENTARGUMENT")
        nameValueCollectionInsideArg = ESRI.ArcGIS.ADF.Web.UI.WebControls.CallbackUtility.ParseStringIntoNameValueCollection(postbackEventArguments)

        ' Get the value of the custom argument created via JavaScript in AddArgumentsToTool.aspx
        Dim inlineValue As String = nameValueCollectionInsideArg("inlineArgument")
      End If
    End Sub

    #End Region
  End Class
End Namespace