c# - TeeChart RedCross Error Continued -

this post corresponds answer on previous post...

before upload simple project you, let me try else: noticed when swap points series colorgrid series same thing happens, but, when (with colorgrid series) use "mycolorgrid.yvalues[gridposition] = val" instead of mycolorgrid.add(x, y, z) works. there way can use points series in same way, ie, allocate points first time, , use xvalues[idx] = x, , yvalues[idx] = y update points? problem seems happen when use add method, clear method. when update values xvalues , yvalues etc. problem seems solved! thing is, can not work on points series...it easy colorgrid series:

            (int r = 0; r < 128; r++)             {                 (int d = 0; d < 128; d++)                 {                                    mycolorgrid.yvalues[d * 128 + r] = some_value;                 }             }              mycolorgrid.beginupdate();             mycolorgrid.endupdate(); 

question 1: how achieve same points series? question 2: if succeed, how clear/delete points, without again having "add(x, y)" them afterwards? question 3: best way use beginupdate/endupdate? whats difference? in general, differences between available update methods, , how choose correct one? few examples:

mycolorgrid.refreshseries mycolorgrid.repaint mytchart.refresh mytchart.autorepaint 

regards

jd

question 1: how achieve same points series?

i suggest use similar code next works in correct way when update points.

steema.teechart.styles.points points1;  steema.teechart.tchart tchart1; random rnd;  public form1() {     initializecomponent();      tchart1 = new steema.teechart.tchart();     this.controls.add(tchart1);     tchart1.aspect.view3d = false;     tchart1.height = 400;     tchart1.width = 500;     tchart1.dock = dockstyle.bottom;     points1 = new steema.teechart.styles.points(tchart1.chart);     rnd = new random();     initializechart(); }  private void initializechart() {      (int = 0; < 128; i++)     {         points1.add(i, rnd.next(100));       }     tchart1.refresh(); }  private void button1_click(object sender, eventargs e) {     (int = 0; < 128; i++)     {         points1.xvalues[i] = i+1;         points1.yvalues[i] = rnd.next(100);      }     points1.beginupdate();     points1.endupdate();  } 

question 2: if succeed, how clear/delete points, without again having "add(x, y)" them afterwards?

i suggest use method setnull() make null point don't want. can same next line of code:

points1.setnull(3);  

question 3: best way use beginupdate/endupdate? whats difference? in general, differences between available update methods, , how choose correct one? few examples:

about beginupdate/endupdate:

the beginupdate method recalculates function 1 time, when finished adding points , endupdate method necessary used .beginupdate recalculate function once when finished adding points. therefore, must use both methods when decide use beginupdate update series.

about other methods:

the differences between methods explained definition found in documentation , can see in next lines:

series.refreshseries: refreshseries method notifies dependent series recalculate points again. each series has datasource property. when datasource valid series or dataset component, series point values datasource , adds them series points. refreshseries method forces series clear , points again datasource component. refreshing process traverses series tree recursively

series.repaint: series method forces whole parent chart repaint. don't call repaint directly. can used within derived tchartseries components when changing properties internally .

tchart.refresh: forces control invalidate client area , redraw , child controls.

tchart.autorepaint: use autorepaint false disable chart repainting whilst (for example) adding large number of points chart series. avoids repainting of chart whilst points added. autorepaint may re-enabled, followed manual repaint command when points added.

i hope helps. if have questions please let me know.

thanks,