Draw cell by event. How change the row height according the drawing result?

[Matanya Cohen]

A

Draw cell by event BeginCellLayout. How change the row height according the drawing result?

B:

Also from your doc not clear when used with BeginCellLayout and when with  EndCellLayout

Thanks.

[Jeyalakshmi Thangamarippandian]

Hi Matanya,

Draw cell by event BeginCellLayout. How change the row height according the drawing result?

We can define the row height in a PDF grid before calling the BeginCellLayout event, but it can't be modified the row height. For example, to draw text in a PDF document, you can measure the size of a string using the PdfFont.MeasureString method and then set the row height accordingly. Please refer to the UG and API documentations for further details: Working with Text | Syncfusion Working with Tables using PdfGrid | Syncfusion PdfGrid Class - C# PDF Library API Reference | Syncfusion PdfGrid Class - C# PDF Library API Reference | Syncfusion

Also from your doc not clear when used with BeginCellLayout and when with  EndCellLayout

BeginCellLayout: This event is triggered before the cell content is drawn. It is used to customize or measure the cell content before it is rendered. You can adjust properties such as cell height, width, or content alignment within this event. EndCellLayout: This event is triggered after the cell content has been drawn. It is used to perform any additional drawing or adjustments needed after the cell content has been rendered

Regards,

Jeyalakshmi T

[Matanya Cohen]

BeginCellLayout: This event is triggered before the cell content is drawn. It is used to customize or measure the cell content before it is rendered. You can adjust properties such as cell height, width, or content alignment within this event.

I try it:

static PdfDocument pdfExmpl4()

{
    PdfDocument document = new PdfDocument();
    PdfPage page = document.Pages.Add();
    PdfGraphics graphics = page.Graphics;


    PdfGrid grd = new PdfGrid();


    grd.BeginCellLayout += PdfGrid_BeginCellLayout;
    grd.Columns.Add(1);


    grd.Headers.Add(1);
    grd.Headers[0].Cells[0].Value = "Header";


    grd.Rows.Add(); grd.Rows[0].Cells[0].Value = "Petel";
    grd.Rows.Add(); grd.Rows[1].Cells[0].Value = "Kabul";
    grd.Rows.Add(); grd.Rows[2].Cells[0].Value = "Titan";


    PdfLayoutResult result;
    result = grd.Draw(page, new Syncfusion.Drawing.PointF(3, 3));
    return document;
}


private static void PdfGrid_BeginCellLayout(object sender, PdfGridBeginCellLayoutEventArgs args)
{
    if (args.RowIndex!=1 || args.IsHeaderRow) { return; }

    PdfGrid grd = (PdfGrid)sender;
    grd.Rows[args.RowIndex].Height = 80;
   
    PdfFont font = new PdfStandardFont(PdfFontFamily.Helvetica, 15);
    RectangleF rec = new RectangleF(args.Bounds.X, args.Bounds.Y, args.Bounds.Width, 200);
    args.Graphics.DrawString("Hello World! ", font, PdfBrushes.Black, rec);
}
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The result not seem work, the row height not e:

[Jeyalakshmi Thangamarippandian]

Hi Matanya,

We have modified a sample for replacing the text in a PDF grid. The sample is attached for your reference. We kindly request you to try it out and let us know if you require any further assistance.

Code snippet:

static void PdfGrid_BeginCellLayout(object sender, PdfGridBeginCellLayoutEventArgs args)

{

   if (args.RowIndex != 1 || args.IsHeaderRow) { return; }

 

   PdfGrid grd = (PdfGrid)sender;

   grd.Rows[args.RowIndex].Cells[args.CellIndex].Value = string.Empty;

  

   PdfFont font = new PdfStandardFont(PdfFontFamily.Helvetica, 12);

   RectangleF rec = new RectangleF(args.Bounds.X, args.Bounds.Y, args.Bounds.Width, 200);

   args.Graphics.DrawString("Hello World!", font, PdfBrushes.Black, rec);

}

 

Sample link:

https://www.syncfusion.com/downloads/support/directtrac/general/ze/F189314_F189359_Sample-1432711168

Regards,

Jeyalakshmi T

[Matanya Cohen]

Thanks answer how remove original value.

But My q why the row height not change by the line:

PdfGrid grd = (PdfGrid)sender;

grd.Rows[args.RowIndex].Height = 80;
 Copy

Did you say that line height cannot be change within the event?

(I mention again. you wrote above: You can adjust properties such as cell height, width, or content alignment within this event. )

Thanks

[Jeyalakshmi Thangamarippandian]

Hi Matanya,

Sorry for the miscommunication. We are unable to change the row height, cell height, width, or alignment of the grid cell. However, we do have the option to skip rendering the cell content. This allows us to customize the cell area as needed. Please note that we can only assign or modify the row height before drawing the grid on the document, and we cannot make changes during the cell event.

Regards,

Jeyalakshmi T

[Matanya Cohen]

Thanks.

Here my work around after I realize that height cannot be change.

May consider some solution for situation with string not fit to column width. And we don't want  wrapping, or we want limit the wrapping for two lines. And also we want add some clue that the text is only the part of big one(...).

Indeed we can loop over all text and fields, and check it prior Grid.Draw with 

PdfStringLayouter
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And set the height of each row accordingly. But the grid meant to free us from kind work around.

Also, I realize that have another issue (Did you know about it?). Wen we ask for cell: No-Wrap (StringFormat.WordWrap), It's any way increase the row height even there no second text line! It's seem that Grid calculate the row height before apply the StringFormat.

So, Even we want just stop wrapping the text. we still need to Set the row height manually.

[Moorthy Karunanithi]

Hi Matanya,

Thank you for the update.

We are currently looking into this and will provide further details on July 25, 2024.

Regards,

Moorthy K

[Jeyalakshmi Thangamarippandian]

Hi Matanya,

Thank you for your patience,

 

Here my work around after I realize that height cannot be change.   May consider some solution for situation with string not fit to column width. And we don't want   wrapping, or we want limit the wrapping for two lines. And also we want add some clue that the text is only the part of big one(...).   Indeed we can loop over all text and fields, and check it prior Grid.Draw with   PdfStringLayouter

We have prepared a sample to meet the requirement of measuring a string with a line limit of two lines using `PdfStringLayouter` before drawing the grid.   Sample Link: https://www.syncfusion.com/downloads/support/directtrac/general/ze/GridSample-1429022256.zip

And set the height of each row accordingly. But the grid meant to free us from kind work around. Also, I realize that have another issue (Did you know about it?). Wen we ask for cell: No-Wrap (StringFormat.WordWrap), It's any way increase the row height even there no second text line! It's seem that Grid calculate the row height before apply the StringFormat. So, Even we want just stop wrapping the text. we still need to Set the row height manually.

We attempted to replicate the problem by providing text to fit within the row width, but we did not experience the reported issue. Even when there is no second line of text, increasing the row height did not solve the problem. We have shared a sample for your reference. When the text is not wrapped [No-Wrap], it will be drawn in a single line with the available width.   Sample: https://www.syncfusion.com/downloads/support/directtrac/general/ze/GridSample325573168.zip

Regards,

Jeyalakshmi T