chart exports in pdf only the first page

Question

I'm using blazor server 19.3.0.43 and I need to export a charts in pdf (see attachment) which has two series as below, but regardless the number of bars, only one page is exported in pdfHow can I export all the pages of the complete chart ? And how can I remove the margins of the pdf to use the whole A4 page space ? Attachment: Grafico_prodotti_(1)_336d1a4d.zip

Durga Gopalakrishnan · Answer

Hi Walter,

Thanks for using Syncfusion products.

We have analyzed your queries with provided snippet. We request you to specify the Height and Width for chart to export in required size. We have prepared sample based on your requirement. Please check with below snippet and sample.

Exported PDF

Sample : https://www.syncfusion.com/downloads/support/directtrac/general/ze/ChartPDF-1519847696.zip

Please let us know if you have any concerns.

Regards,

Durga G

Walter Martin · Answer

Thanks for the answerUsing your width and height the export in pdf is now correct as you can see in the attachment, but the chart is resized to stay in only one page so it's almost unreadableFor this reason I tried to change the height value to have the increase the bar's height but in this way the chart is truncated.Is there any option to split the chart in more than one pdf's page ?Attachment: Grafico_prodotti_(7)_645d1c1c.zip

Durga Gopalakrishnan · Answer

Hi Walter, 

We have validated your required scenario. As of now we don’t have an option to split the chart into multiple pages. You can split the datasource and provide it for two separate charts to view the bar width as high when assigning large data. 

Kindly revert us if you have any concerns. 

Regards,  Durga G

Walter Martin · Answer

Do you have any sample on how can I create a sfchart totally from code behind ?

If I have to split the data in several charts I need to create them from code behind and then export them in several pdf

I tried to create a sfchart unsuccessfully because I think it's necessary to specify the ChartPrimaryXAxis but I don't find the syntax to add it to the sfchart

Durga Gopalakrishnan · Answer

Hi Walter, 

As of now, we don’t have support to create the chart totally from code behind. Please let us know if you have any concerns. 

Regards, 
Durga G

Walter Martin · Answer

I have about 160 items in my datasource so to have a "visible" chart, I have to keep about 15 items every page so this lead to export 160/15 = 11 pdf files To do that, I tried to use a for loop to load in one only sfchart 15 items at a time and then export it Something like... DatiProdottiParziali = DatiProdotti;int

enloop

= DatiProdotti.Count / 15;for (int i = 0; i < enloop; i++){DatiProdotti = DatiProdottiParziali.Skip(i * 15).Take(15).ToList();chartInstance.Export(ExportType.PDF, "Grafico prodotti");}but this approach doesn't work because all the pdf pages exported have the first 15 itemsIt seems to be that the datasource of the

chartInstance doesn't change before exporting it ... is there a way to force  a refresh of chartInstance ?

chartInstance.Refresh() does nothing

Durga Gopalakrishnan · Answer

Hi Walter, 
  
We are analyzing your reported scenario. We will update the status within one business day(26th October, 2021). We appreciate your patience until then. 
  
Regards, 
Durga G

Durga Gopalakrishnan · Answer

Hi Walter, 

We have analyzed your query with provided snippet. We request you to call StateHasChanged method after changing the chart series datasource and Task.Delay for 1 second before exporting the chart with new changes. We have prepared sample based on your requirement. Please check with below and sample. 





public int Length = 5; 
    protected override void OnInitialized() 
    { 
        Data = ChartPoints.Take(Length).ToList(); 
    } 
public async void ExportChart(Microsoft.AspNetCore.Components.Web.MouseEventArgs args) 
    { 
        var count = ChartPoints.Count / Length; 
        for (int i = 0; i < count; i++) 
        { 
            Data = ChartPoints.Skip(i * Length).Take(Length).ToList(); 
            this.StateHasChanged(); 
            await Task.Delay(1000); 
            await chartInstance.ExportAsync(ExportType.PDF, "Chart"); 
        } 
    } 

Sample : https://www.syncfusion.com/downloads/support/directtrac/general/ze/MultipleExport1026785245.zip 

Kindly revert us if you have any concerns. 

Regards,  Durga G

Walter Martin · Answer

Thanks, it worls in this wayI hope the option to split the data in several pages but in one only pdf will be available one day

Durga Gopalakrishnan · Answer

Hi Walter, 

We are not clear about your exact query. If you split datasource in odd count, for example among 11 datapoints, need to display first 5 datapoints in 1st pdf and next 5 datapoints in 2nd pdf, then remaining 1 datapoint will be displayed in 3rd pdf. Whether you are mentioning this case? Please share more details about your requirement so that it will be helpful for further analayis. 

Regards,  Durga G

Walter Martin · Answer

I have in my datasource 148 records to show in a chartIf I simply export them they are exported  in one page of one pdf file

and they're truncated  so the bars are  almost unreadableUsing your suggestion, I changed the chart height and I get only 15 records at a time to show them in a more readable way as in my attachment but of course I exported  in this way 10 pdf files made up of one page onlyI'd like to export instead the 148 records in 10 pages of one only pdf fileIf I've well understood, this is not possible up to now.Attachment: Grafico_prodotti_(10)_1476f8f7.zip

Durga Gopalakrishnan · Answer

Hi Walter, 
  
Sorry for the inconvenience. Currently, we don’t have support to export the chart into multiple pages. Please let us know if you have any concerns. 
  
Regards,  
Durga G