A question about dataSource under Edit style

[madis_xsy]

The series' datasource I used in the teechart is "text file" under "Edit" style, but when I update the data in the text file, the chart does not change at the same time. so I want to know how to realize the synchronous changes?

the version we used is "TeeChart2.0 for .net" and the control in asp.net we used is "WebChart".

Thanks a lot and looking forward the answer!!

[Narcís]

Hi madis_xsy,

You can try updating your series data using:

Code: Select all

WebChart1.Chart[0].CheckDataSource();

[madis_xsy]

I try the sentence "this.WebChart1.Chart[0].CheckDataSource();",but it still doesn't work, the chart is not update. i paste the code below, please check it for me ,thanks!

Code: Select all

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 System.IO;
using Steema.TeeChart;


namespace _20060210CsChart
{
	/// <summary>
	/// test 的摘要说明。
	/// </summary>
	public class test : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Button Button1;
		protected Steema.TeeChart.Styles.Bar bar1;
		protected Steema.TeeChart.Data.TextSource textSource1;
		protected Steema.TeeChart.Web.WebChart WebChart1;
		
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
			this.WebChart1.Visible=false;
			this.WebChart1.Chart[0].CheckDataSource();
			
			

		}

		


		#region Web 窗体设计器生成的代码
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.bar1 = new Steema.TeeChart.Styles.Bar();
			this.textSource1 = new Steema.TeeChart.Data.TextSource();
			this.Button1.Click += new System.EventHandler(this.Button1_Click);
			// 
			// bar1
			// 
			// 
			// bar1.Brush
			// 
			this.bar1.Brush.Color = System.Drawing.Color.Red;
			this.bar1.DataSource = this.textSource1;
			// 
			// bar1.Pen
			// 
			this.bar1.Pen.Color = System.Drawing.Color.FromArgb(((System.Byte)(153)), ((System.Byte)(0)), ((System.Byte)(0)));
			this.bar1.Title = "bar1";
			// 
			// bar1.XValues
			// 
			this.bar1.XValues.DataMember = "X";
			this.bar1.XValues.Order = Steema.TeeChart.Styles.ValueListOrder.Ascending;
			// 
			// bar1.YValues
			// 
			this.bar1.YValues.DataMember = "Bar";
			// 
			// textSource1
			// 
			this.textSource1.DecimalSeparator = '.';
			this.textSource1.Fields.AddRange(new Steema.TeeChart.Data.TextField[] {
																					  new Steema.TeeChart.Data.TextField(2, "Text"),
																					  new Steema.TeeChart.Data.TextField(0, "X"),
																					  new Steema.TeeChart.Data.TextField(1, "Bar")});
			this.textSource1.FileName = "C:\\Inetpub\\wwwroot\\20060210CsChart\\DataBar.txt";
			this.textSource1.HeaderLines = 2;
			this.textSource1.Series = this.bar1;
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void Button1_Click(object sender, System.EventArgs e)
		{	
			this.bar1.CheckDataSource();
			this.WebChart1.Visible=true;
		
			

			
		}
	}
}

[Narcís]

Hi madis_xsy,

You should do something like this:

Code: Select all

		private void button1_Click(object sender, System.EventArgs e)
		{
			TeeChart.Data.TextSource ts = new TeeChart.Data.TextSource(textBox2.Text);
			try
			{
				Cursor = Cursors.WaitCursor;
				if (ts.IsURL())
				{
					ts.HeaderLines = 2;
					ts.Separator = ',';
					ts.Fields.Add(0,"X");
					ts.Fields.Add(1,"Bar");
					ts.Fields.Add(2,"Text");
					bar1.DataSource = ts;
				}
			}
			finally
			{
				Cursor = Cursors.Default;
			}
		}