nearly every time I call the Delete-Method on a Line.System.NullReferenceException at Steema.TeeChart.Styles.Series.Delete(Int32 index)
I'm using TeeChart v1.1.1544.23908 and CLRv1.1.4322.573 and the following works as expected here:The error occurs since I use the registered version of TeeChart, v1.1.1544.23908. With the trial version I had before, v1.0.1197.1065, I had no problems.
Can someone tell me if there's a fix for this problem?
Code: Select all
private: System::Void Form1_Load(System::Object * sender, System::EventArgs * e)
{
line1->FillSampleValues();
}
private: System::Void button1_Click(System::Object * sender, System::EventArgs * e)
{
line1->Delete(2);
}Code: Select all
#pragma once
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
namespace WindowsApplication3
{
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
/// <summary>
/// Summary for Form1
///
/// WARNING: If you change the name of this class, you will need to change the
/// 'Resource File Name' property for the managed resource compiler tool
/// associated with all .resx files this class depends on. Otherwise,
/// the designers will not be able to interact properly with localized
/// resources associated with this form.
/// </summary>
public __gc class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void)
{
InitializeComponent();
this->timer1->Enabled = true;
this->timer1->Interval = 100;
}
protected:
void Dispose(Boolean disposing)
{
if (disposing && components)
{
components->Dispose();
}
__super::Dispose(disposing);
}
private: Steema::TeeChart::TChart * tChart1;
private: Steema::TeeChart::Styles::Line * line1;
private: System::Windows::Forms::Button * button1;
private: System::Windows::Forms::Timer * timer1;
private: System::ComponentModel::IContainer * components;
private:
/// <summary>
/// Required designer variable.
/// </summary>
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
void InitializeComponent(void)
{
this->components = new System::ComponentModel::Container();
this->tChart1 = new Steema::TeeChart::TChart();
this->line1 = new Steema::TeeChart::Styles::Line();
this->button1 = new System::Windows::Forms::Button();
this->timer1 = new System::Windows::Forms::Timer(this->components);
this->SuspendLayout();
//
// tChart1
//
//
// tChart1.Header
//
System::String* __mcTemp__1[] = new System::String*[1];
__mcTemp__1[0] = S"TeeChart";
this->tChart1->Header->Lines = __mcTemp__1;
this->tChart1->Location = System::Drawing::Point(32, 24);
this->tChart1->Name = S"tChart1";
this->tChart1->Series->Add(this->line1);
this->tChart1->TabIndex = 0;
//
// line1
//
//
// line1.Brush
//
this->line1->Brush->Color = System::Drawing::Color::Red;
//
// line1.Pointer
//
//
// line1.Pointer.Brush
//
this->line1->Pointer->Brush->Color = System::Drawing::Color::Red;
this->line1->Pointer->Style = Steema::TeeChart::Styles::PointerStyles::Rectangle;
this->line1->Title = S"line1";
//
// line1.XValues
//
this->line1->XValues->Order = Steema::TeeChart::Styles::ValueListOrder::Ascending;
//
// button1
//
this->button1->Location = System::Drawing::Point(448, 272);
this->button1->Name = S"button1";
this->button1->TabIndex = 1;
this->button1->Text = S"button1";
this->button1->Click += new System::EventHandler(this, button1_Click);
//
// timer1
//
this->timer1->Tick += new System::EventHandler(this, timer1_Tick);
//
// Form1
//
this->AutoScaleBaseSize = System::Drawing::Size(5, 13);
this->ClientSize = System::Drawing::Size(544, 310);
this->Controls->Add(this->button1);
this->Controls->Add(this->tChart1);
this->Name = S"Form1";
this->Text = S"Form1";
this->Load += new System::EventHandler(this, Form1_Load);
this->ResumeLayout(false);
}
private: System::Void Form1_Load(System::Object * sender, System::EventArgs * e)
{
}
private: System::Void button1_Click(System::Object * sender, System::EventArgs * e)
{
line1->Delete(2);
}
private: System::Void timer1_Tick(System::Object * sender, System::EventArgs * e)
{
this->refresh();
}
private: void refresh()
{
while (this->line1->Count>10)
{
//the error always occurs at this line:
this->line1->Delete(0);
}
System::DateTime now = System::DateTime::Now;
this->line1->Add(now,30);
}
};
}
Well, I think I'd understand it better if you could send me a simple VC++ .NET project that I can run "as-is" to reproduce the problem here. If you could, please post the project here:@Christopher Ireland: the code works fine, but our problem is that we do not produce the lines in a ".net Form class" but in an autonomous class.
That means, I have to show the same lines in several charts that are located in different Forms. So I just wanted to have one class that produces all lines, but does not visualize them and to add the lines to the charts in the other classes then. Strange is that it works with the evaluation version (see above) but not with the licensed version. Perhaps you can trie to call the constructor of our class quoted above in another class to reproduce the error. I hope you understand my problem!
Many thanks for the project. I've found the error and corrected it; the fix will be included into the next maintenance release due out shortly.sorry for the delay. I have posted a simple project.
I hope it helps you finding the error.