defaultvb.aspx.vb

Telerik是很大的第三方软件制造商

Imports System
Imports System.Collections
Imports System.ComponentModel
Imports System.Data
Imports System.Drawing
Imports System.Web
Imports System.Web.SessionState
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.HtmlControls
Imports Telerik.QuickStart
Imports Telerik.WebControls


Namespace Telerik.ChartExamplesVB.Configurator.Appearance.Hatches
    '/ <summary>
    '/ Summary description for _Default.
    '/ </summary>

    Public Class DefaultVB
        Inherits XhtmlPage
        Protected Label1 As System.Web.UI.WebControls.Label
        Protected ddlMainColor As System.Web.UI.WebControls.DropDownList
        Protected Label2 As System.Web.UI.WebControls.Label
        Protected ddlSecondColor As System.Web.UI.WebControls.DropDownList
        Protected Label3 As System.Web.UI.WebControls.Label
        Protected WithEvents Button1 As System.Web.UI.WebControls.Button
        Protected ddlHatchStyle As System.Web.UI.WebControls.DropDownList
        Protected Label4 As System.Web.UI.WebControls.Label
        Protected RadChart1 As Telerik.WebControls.RadChart
        Protected WithEvents ddlChartElement As System.Web.UI.WebControls.DropDownList

        Private chartElementsHash As System.Collections.Hashtable

        Private keyNames As String() = {"Background", "Plot area", "Title", "Legend", "Series 1", "Series 2", "Item 1", "Item 2"}


        Private Sub BuildHashTable()
            chartElementsHash = New System.Collections.Hashtable()
            chartElementsHash.Add(keyNames(0), RadChart1.Background)
            chartElementsHash.Add(keyNames(1), RadChart1.PlotArea)
            chartElementsHash.Add(keyNames(2), RadChart1.Title1.Background)
            chartElementsHash.Add(keyNames(3), RadChart1.Legend.Background)
            chartElementsHash.Add(keyNames(4), RadChart1.GetChartSeries(0).Appearance)
            chartElementsHash.Add(keyNames(5), RadChart1.GetChartSeries(1).Appearance)
            chartElementsHash.Add(keyNames(6), RadChart1.GetChartSeries(0).Items(0).Appearance)
            chartElementsHash.Add(keyNames(7), RadChart1.GetChartSeries(1).Items(0).Appearance)
        End Sub 'BuildHashTable


        Private Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
            BuildHashTable()

            If Not Page.IsPostBack Then
                InitControls()
                SetControlValues()
            End If
        End Sub 'Page_Load


        Private Sub InitControls()
            Dim valueNames() As String

            ' Init Colors
            valueNames = [Enum].GetNames(GetType(KnownColor))

            ddlMainColor.Items.Clear()
            ddlSecondColor.Items.Clear()

            Dim s As String
            For Each s In valueNames
                ddlMainColor.Items.Add(s)
                ddlSecondColor.Items.Add(s)
            Next s

            ' Init gradient fill styles:
            valueNames = [Enum].GetNames(GetType(System.Drawing.Drawing2D.HatchStyle))

            ddlHatchStyle.Items.Clear()

            For Each s In valueNames
                ddlHatchStyle.Items.Add(s)
            Next s

            ddlChartElement.Items.Clear()

            For Each s In keyNames
                ddlChartElement.Items.Add(s)
            Next s
        End Sub 'InitControls


        Private Sub SetControlValues()
            Dim appearance As ChartRectShape = GetCurrentAppearance()

            If Not (appearance Is Nothing) Then
                ddlMainColor.SelectedIndex = ddlMainColor.Items.IndexOf(ddlMainColor.Items.FindByText(appearance.MainColor.ToKnownColor().ToString()))
                ddlSecondColor.SelectedIndex = ddlSecondColor.Items.IndexOf(ddlSecondColor.Items.FindByText(appearance.SecondColor.ToKnownColor().ToString()))
                ddlHatchStyle.SelectedIndex = ddlHatchStyle.Items.IndexOf(ddlHatchStyle.Items.FindByText(appearance.HatchStyle.ToString()))
            End If
        End Sub 'SetControlValues


        Private Function GetCurrentAppearance() As ChartRectShape
            Return CType(chartElementsHash(ddlChartElement.SelectedItem.Value), ChartRectShape)
        End Function 'GetCurrentAppearance


#Region "Web Form Designer generated code"

        Protected Overrides Sub OnInit(ByVal e As EventArgs)
            '
            ' CODEGEN: This call is required by the ASP.NET Web Form Designer.
            '
            InitializeComponent()
            MyBase.OnInit(e)
        End Sub 'OnInit


        '/		Required method for Designer support - do not modify
        '/		the contents of this method with the code editor.
        '/ </summary>
        Private Sub InitializeComponent()
        End Sub 'InitializeComponent

#End Region


        Private Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
            Dim appearance As ChartRectShape = GetCurrentAppearance()

            appearance.MainColor = Color.FromName(ddlMainColor.SelectedItem.Value)
            appearance.SecondColor = Color.FromName(ddlSecondColor.SelectedItem.Value)
            appearance.HatchStyle = CType([Enum].Parse(GetType(System.Drawing.Drawing2D.HatchStyle), ddlHatchStyle.SelectedItem.Value, True), System.Drawing.Drawing2D.HatchStyle)
            appearance.FillStyle = FillStyle.Hatch
        End Sub 'Button1_Click


        Private Sub ddlChartElement_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ddlChartElement.SelectedIndexChanged
            SetControlValues()
        End Sub 'ddlChartElement_SelectedIndexChanged
    End Class 'DefaultCS 
End Namespace 'Telerik.ChartExamplesCS.Hatches