defaultcs.aspx.cs

Telerik是很大的第三方软件制造商

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

namespace Telerik.ChartExamplesCS.Gradients
{
	/// <summary>
	/// Summary description for _Default.
	/// </summary>
	public class DefaultCS: XhtmlPage
	{
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.Button Button1;
		protected System.Web.UI.WebControls.Label Label2;
		protected System.Web.UI.WebControls.Label Label3;
		protected System.Web.UI.WebControls.DropDownList ddlMainColor;
		protected System.Web.UI.WebControls.DropDownList ddlSecondColor;
		protected System.Web.UI.WebControls.DropDownList ddlGradientFillStyle;
		protected System.Web.UI.WebControls.Label Label6;
		protected System.Web.UI.WebControls.TextBox txtBoxGradientFocus;
		protected System.Web.UI.WebControls.CheckBox cbGammaCorrection;
		protected System.Web.UI.WebControls.Label Label4;
		protected System.Web.UI.WebControls.RangeValidator RangeValidator1;
		protected System.Web.UI.WebControls.Label Label5;
		protected Telerik.WebControls.RadChart RadChart1;
		protected System.Web.UI.WebControls.DropDownList ddlChartElement;

		private System.Collections.Hashtable chartElementsHash;

		string[] keyNames = { "Background", "Plot area", "Title", "Legend", "Series 1", "Series 2", "Item 1", "Item 2" };

		private void 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);            
		}

		private void Page_Load(object sender, System.EventArgs e)
		{   
			BuildHashTable();

			if (!Page.IsPostBack)
			{
				InitControls();
				SetControlValues();
			}			
		}

		private void InitControls()
		{
			string[] valueNames;

			// Init Colors
			valueNames = Enum.GetNames(typeof(KnownColor));

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

			foreach (string s in valueNames)
			{
				ddlMainColor.Items.Add(s);
				ddlSecondColor.Items.Add(s);
			}

			// Init gradient fill styles:
			valueNames = Enum.GetNames(typeof(GradientFillStyle));

			ddlGradientFillStyle.Items.Clear();

			foreach (string s in valueNames)
			{
				ddlGradientFillStyle.Items.Add(s);
			}

			ddlChartElement.Items.Clear();

			foreach (string s in keyNames)
			{
				ddlChartElement.Items.Add(s);
			}
		}

		private void SetControlValues()
		{
			ChartRectShape appearance = GetCurrentAppearance();

			if (appearance != null)
			{
				ddlMainColor.SelectedIndex          = ddlMainColor.Items.IndexOf(ddlMainColor.Items.FindByText(appearance.MainColor.ToKnownColor().ToString()));
				ddlSecondColor.SelectedIndex        = ddlSecondColor.Items.IndexOf(ddlSecondColor.Items.FindByText(appearance.SecondColor.ToKnownColor().ToString()));
				ddlGradientFillStyle.SelectedIndex  = ddlGradientFillStyle.Items.IndexOf(ddlGradientFillStyle.Items.FindByText(appearance.GradientFillStyle.ToString()));
				cbGammaCorrection.Checked           = appearance.GammaCorrection;                
				txtBoxGradientFocus.Text            = appearance.GradientFocus.ToString();
			}            
		}

		private ChartRectShape GetCurrentAppearance()
		{
			return (ChartRectShape) chartElementsHash[ddlChartElement.SelectedItem.Value];
		}
		

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		///		Required method for Designer support - do not modify
		///		the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.ddlChartElement.SelectedIndexChanged += new System.EventHandler(this.ddlChartElement_SelectedIndexChanged);
			this.Button1.Click += new System.EventHandler(this.Button1_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void Button1_Click(object sender, System.EventArgs e)
		{
			ChartRectShape elementAppearance = GetCurrentAppearance();
                                               
			if (elementAppearance != null)
			{
				elementAppearance.MainColor             = Color.FromName(ddlMainColor.SelectedItem.Value);
				elementAppearance.SecondColor           = Color.FromName(ddlSecondColor.SelectedItem.Value);
				elementAppearance.GradientFillStyle     = (GradientFillStyle) Enum.Parse(typeof(GradientFillStyle), ddlGradientFillStyle.SelectedItem.Value, true);                
				try
				{
					elementAppearance.GradientFocus         = float.Parse(txtBoxGradientFocus.Text);                    
				}
				catch
				{
					txtBoxGradientFocus.Text = "Value must be between 0 and 1";
				}
				elementAppearance.GammaCorrection       = cbGammaCorrection.Checked;
				elementAppearance.FillStyle             = FillStyle.Gradient;
			}                                                                                                 
            
		}

		private void ddlChartElement_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			SetControlValues();
		}
			
	}
}