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I am trying to change the top border of a table in PowerPoint via OpenXml, but it has not worked for me. The cell currently has a left, right, and bottom border, but when I try to copy the bottom border and add it to the top border, PowerPoint does not reflect the change.

What do I need to change or am I doing wrong to make it work?

I currently have the following code to copy the bottom border and replace it.

 BottomBorderLineProperties btp = (BottomBorderLineProperties)celda.TableCellProperties.BottomBorderLineProperties.CloneNode(true); TopBorderLineProperties tbp = new TopBorderLineProperties() { Alignment = btp.Alignment, CapType = btp.CapType, CompoundLineType = btp.CompoundLineType, MCAttributes = btp.MCAttributes, Width = btp.Width }; foreach(OpenXmlElement element in btp.ChildElements) { tbp.Append(element.CloneNode(true)); } celda.TableCellProperties.TopBorderLineProperties = tbp;

Thanks!

PS: Sorry for my english

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1 Answer 1

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In order to set the top border of a cell in the middle of a PowerPoint table, you have to complete 2 steps:

Step 1: set the bottom border of the cell directly above the cell in question and

Step 2: set the top border of the cell in question (you have that part)

I determined this by using the OpenXML Productivity Tool. I took a simple 1 slide PowerPoint file named Before.pptx with a table cell that had the left, bottom and right borders.

enter image description here

Then I added the top border (using PowerPoint 2016) and saved the file as After.pptx. I then used the Productivity Tool to diff the 2 files and reverse engineer the C# code required to make Before.pptx look like After.pptx. The important code you need is displayed here:

 //STEP 1 CODE STARTS HERE A.Table table1=graphicData1.GetFirstChild<A.Table>(); A.TableRow tableRow1=table1.GetFirstChild<A.TableRow>(); A.TableRow tableRow2=table1.Elements<A.TableRow>().ElementAt(1); A.TableCell tableCell1=tableRow1.Elements<A.TableCell>().ElementAt(2); A.TableCellProperties tableCellProperties1=tableCell1.GetFirstChild<A.TableCellProperties>(); A.BottomBorderLineProperties bottomBorderLineProperties1 = new A.BottomBorderLineProperties(){ Width = 12700, CapType = A.LineCapValues.Flat, CompoundLineType = A.CompoundLineValues.Single, Alignment = A.PenAlignmentValues.Center }; A.SolidFill solidFill1 = new A.SolidFill(); A.SchemeColor schemeColor1 = new A.SchemeColor(){ Val = A.SchemeColorValues.Text1 }; solidFill1.Append(schemeColor1); A.PresetDash presetDash1 = new A.PresetDash(){ Val = A.PresetLineDashValues.Solid }; A.Round round1 = new A.Round(); A.HeadEnd headEnd1 = new A.HeadEnd(){ Type = A.LineEndValues.None, Width = A.LineEndWidthValues.Medium, Length = A.LineEndLengthValues.Medium }; A.TailEnd tailEnd1 = new A.TailEnd(){ Type = A.LineEndValues.None, Width = A.LineEndWidthValues.Medium, Length = A.LineEndLengthValues.Medium }; bottomBorderLineProperties1.Append(solidFill1); bottomBorderLineProperties1.Append(presetDash1); bottomBorderLineProperties1.Append(round1); bottomBorderLineProperties1.Append(headEnd1); bottomBorderLineProperties1.Append(tailEnd1); tableCellProperties1.Append(bottomBorderLineProperties1); //STEP 1 CODE ENDS HERE //STEP 2 CODE STARTS HERE A.TableCell tableCell2=tableRow2.Elements<A.TableCell>().ElementAt(2); A.TableCellProperties tableCellProperties2=tableCell2.GetFirstChild<A.TableCellProperties>(); A.BottomBorderLineProperties bottomBorderLineProperties2=tableCellProperties2.GetFirstChild<A.BottomBorderLineProperties>(); A.TopBorderLineProperties topBorderLineProperties1 = new A.TopBorderLineProperties(){ Width = 12700, CapType = A.LineCapValues.Flat, CompoundLineType = A.CompoundLineValues.Single, Alignment = A.PenAlignmentValues.Center }; A.SolidFill solidFill2 = new A.SolidFill(); A.SchemeColor schemeColor2 = new A.SchemeColor(){ Val = A.SchemeColorValues.Text1 }; solidFill2.Append(schemeColor2); A.PresetDash presetDash2 = new A.PresetDash(){ Val = A.PresetLineDashValues.Solid }; A.Round round2 = new A.Round(); A.HeadEnd headEnd2 = new A.HeadEnd(){ Type = A.LineEndValues.None, Width = A.LineEndWidthValues.Medium, Length = A.LineEndLengthValues.Medium }; A.TailEnd tailEnd2 = new A.TailEnd(){ Type = A.LineEndValues.None, Width = A.LineEndWidthValues.Medium, Length = A.LineEndLengthValues.Medium }; topBorderLineProperties1.Append(solidFill2); topBorderLineProperties1.Append(presetDash2); topBorderLineProperties1.Append(round2); topBorderLineProperties1.Append(headEnd2); topBorderLineProperties1.Append(tailEnd2); tableCellProperties2.InsertBefore(topBorderLineProperties1,bottomBorderLineProperties2);

I ran the code above against my Before.pptx file and the border was complete.

enter image description here

In an effort to double check that the two steps are necessary, I commented out the Step 1 code and ran it against a fresh version of Before.pptx file and the top border was missing. This verifies the problem you were seeing. Therefore, the two steps are necessary to paint the one border.

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I was able to try it out and it works. it looks like the bottomborderline and topborderline goes in pair. If I missed one I am getting a blank slide.

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