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Syncfusion Feedback

DateTimeAxis Chart ruins my page

Thread ID:





127631 Nov 29,2016 12:08 PM UTC Dec 2,2016 09:48 AM UTC ASP.NET Web Forms 4
Tags: Chart
Asked On November 29, 2016 12:08 PM UTC

Hello again.

Found new problem n my code. Help me please. I use https://help.syncfusion.com/file-formats/xlsio/working-with-charts + http://asp.syncfusion.com/demos/web/chart/datetimeaxis.aspx in 1 page. First time i added button with XlsxIO logic and it works well. But then i add DateTimeAxis Chart like in example and now it is not working. Chart builds well, but when i want to export data in xlsx i get a error page:

[HttpRequestValidationException (0x80004005): Обнаружено потенциально опасное значение Request.Form, полученное от клиента (MainContent_Chart1_hidden_model="...point.x#  <br/> Profit : #poin...").]
   System.Web.HttpRequest.ValidateString(String value, String collectionKey, RequestValidationSource requestCollection) +9809832
   System.Web.<>c__DisplayClass280_0.<ValidateHttpValueCollection>b__0(String key, String value) +22
   System.Web.HttpValueCollection.EnsureKeyValidated(String key) +9807829 ...
Source file:  C:\Users\sobolevis\AppData\Local\Temp\Temporary ASP.NET Files\root\dc0da1df\e0565dbe\App_Web_k244sp53.3.cs    Строка:  0             


Chart code:

        <script type="text/javascript" src="../Scripts/ChartData.js"></script>
        <ej:WaitingPopup runat="server" ID="waitingpopup" ShowOnInit="false"></ej:WaitingPopup>
        <ej:Chart ID="Chart1" runat="server" Width="970" Height="600" IsResponsive="true" OnClientLoad="onChartLoad">
            <PrimaryXAxis ValueType="Datetime" LabelFormat="MM-dd HH:mm" IntervalType="Hours" Title-Text="Datetime" /> 
            <PrimaryYAxis LabelFormat="{value}°С" Title-text="Temperature" />
               <ej:Series EnableAnimation="True" Type="Line" Name="Sales" XName="Xvalue" YName="YValue1" 
                   Border-Width="3" Marker-Visible="true" Marker-Size-Height="10"  Marker-Size-Width="10" Tooltip-Visible="true" 
                   Tooltip-Format="Date : #point.x#  &lt;br/> Profit : #point.y#"></ej:Series>
            <Legend Visible="true"></Legend>

Project in attachment. I tied to use validateRequest="false" but it does not work.

Attachment: Holod_r_1_syncfusion_d0e2aa31.7z

Replied On November 29, 2016 12:12 PM UTC

Try to translate 1st yellow string: Founded potentional danger value Request.Form, received from client  (MainContent_Chart1_hidden_model="...point.x# <br/> Profit : #poin...").]

And add the aspx.cs code:

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using Syncfusion.XlsIO;
using System.Data.OleDb;
using System.IO;
using System.Drawing;
using System.Collections;

namespace Holod_r_1
    public partial class _Default : Page
        protected void Page_Load(object sender, EventArgs e)
            //Setting Range for PrimaryXAxis
            this.Chart1.PrimaryXAxis.Range.Min = new DateTime(2000, 06, 06, 23, 55, 00);
            this.Chart1.PrimaryXAxis.Range.Max = new DateTime(2000, 06, 10, 01, 10, 34);
            this.Chart1.PrimaryXAxis.Range.Interval = 6;

            System.Collections.Generic.List<DatetimeData> data = new System.Collections.Generic.List<DatetimeData>();

            data.Add(new DatetimeData(new DateTime(2000, 06, 07, 23, 55, 00), 10));
            data.Add(new DatetimeData(new DateTime(2000, 06, 08, 01, 10, 05), -30));
            data.Add(new DatetimeData(new DateTime(2000, 06, 08, 02, 25, 59), 15));
            data.Add(new DatetimeData(new DateTime(2000, 06, 08, 03, 40, 45), -65));
            data.Add(new DatetimeData(new DateTime(2000, 06, 08, 04, 55, 44), 90));
            data.Add(new DatetimeData(new DateTime(2000, 06, 08, 05, 10, 34), 85));
            data.Add(new DatetimeData(new DateTime(2000, 06, 08, 06, 55, 00), 10));
            data.Add(new DatetimeData(new DateTime(2000, 06, 09, 08, 10, 05), -30));
            data.Add(new DatetimeData(new DateTime(2000, 06, 09, 10, 25, 59), 15));
            data.Add(new DatetimeData(new DateTime(2000, 06, 09, 12, 40, 45), -65));
            data.Add(new DatetimeData(new DateTime(2000, 06, 09, 15, 55, 44), 90));
            data.Add(new DatetimeData(new DateTime(2000, 06, 09, 18, 10, 34), 85));

            //Binding Datasource to Chart
            this.Chart1.DataSource = data;

        protected void Button1_Click(object sender, EventArgs e)
            ExcelEngine excelEngine = new ExcelEngine();

            IApplication application = excelEngine.Excel;

            application.DefaultVersion = ExcelVersion.Excel2013;

            IWorkbook workbook = application.Workbooks.Create(1);

            IWorksheet sheet = workbook.Worksheets[0];

            //Inserts the sample data for the chart

            sheet.Range["A1"].Text = "Month";

            sheet.Range["B1"].Text = "Product A";

            sheet.Range["C1"].Text = "Product B";


            sheet.Range["A2"].Text = "Jan";

            sheet.Range["A3"].Text = "Feb";

            sheet.Range["A4"].Text = "Mar";

            sheet.Range["A5"].Text = "Apr";

            sheet.Range["A6"].Text = "May";

            //Create a random Data

            Random r = new Random();

            for (int i = 2; i <= 6; i++)

                for (int j = 2; j <= 3; j++)
                    sheet.Range[i, j].Number = r.Next(0, 500);

            IChartShape chart = sheet.Charts.Add();

            //Set chart type

            chart.ChartType = ExcelChartType.Line;

            //Set Chart Title

            chart.ChartTitle = "Product Sales comparison";

            //Set first serie

            IChartSerie productA = chart.Series.Add("ProductA");

            productA.Values = sheet.Range["B2:B6"];

            productA.CategoryLabels = sheet.Range["A2:A6"];

            //Set second serie

            IChartSerie productB = chart.Series.Add("ProductB");

            productB.Values = sheet.Range["C2:C6"];

            productB.CategoryLabels = sheet.Range["A2:A6"];

            workbook.SaveAs("chart.xlsx", ExcelSaveType.SaveAsXLS, Response, ExcelDownloadType.PromptDialog);


    public class DatetimeData
        public DatetimeData(DateTime xval, double yvalue1)
            this.Xvalue = xval;
            this.YValue1 = yvalue1;
        public DateTime Xvalue
        public double YValue1

Dharanidharan Dharmasivam [Syncfusion]
Replied On November 30, 2016 08:44 AM UTC

Hi Ilya, 

Thanks for using Syncfusion product. Kindly find the response for your queries below. 

Query 1 & 2:  when i want to export data in xlsx i get a error page & Try to translate 1st yellow string 
Response: We have analyzed your query with the provided sample. The error is due to usage of <br> tag in the tooltip format property. For security purpose in ASP, html tags are blocked. To overcome this, we have logged feature request for this and will be available in any of our upcoming Essential Studio release. For better follow up regarding the feature, we have created branch incident (#168324) under your account, so follow up with incident 168324.  
Also your requirement for tooltip can be achieved by using Tooltip-Template property. By using this property, you will not get any errors as you mentioned and also you can export as excel format. Kindly find the code snippet. 

<div id="Tooltip" style="display: none; color: white; margin-left: 1px;"> 
        <div id="efpercentage">Date: #point.x#</div> 
        <div id="ef">Profit: #point.y#</div> 
<ej:Chart ID="Chart1" runat="server"> 
             <ej:Series Tooltip-Visible="true" Tooltip-Template="Tooltip"> 

For your reference we have attached the sample. Kindly find the sample from below location, 


Replied On December 1, 2016 06:58 AM UTC

Thank you. Now it works well. But this error is in example:  Example . I wish you will edit it)

Dharanidharan Dharmasivam [Syncfusion]
Replied On December 2, 2016 09:48 AM UTC

Hi Ilya, 
Thanks for your update.  
As mentioned in the previous update, if you perform any action in server side with html tags, the issue will occur due to security purpose in ASP, html tags are blocked. In the sample which you have mentioned, we didn’t perform server side operation, so this will not cause issue.  


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