Autofit Row Height of Merged Cell in EPPlus

问题

I'm using EPPlus and C# and trying to autosize/autofit the height of a row to accommodate the height needed to show all of the contents of a merged cell with text wrapping. However no matter what I try the text always truncates. Since I'm repeating this process with various text sizes on various worksheets, I don't want to hard code the row height (except to enforce a minimum height for the row). If possible I'd like to do this within EPPlus/C#.

With the cells A2:E2 merged and WrapText = true:

Cell with Text Truncated

Here's what it should look like with desired Cell Height

Here's my relevant and short C# code

Int32 intToCol;
intToCol = 5;
eppWorksheet.Cells[2, 1, 2, intToCol].Merge = true;
eppWorksheet.Cells[2, 1].Style.WrapText = true; 
//Check if at the minimum height. If not, resize the row
if (eppWorksheet.Row(2).Height < 35.25)
{
    eppWorksheet.Row(2).Height = 35.25;
}

I've looked at Autofit rows in EPPlus and it didn't seem to directly answer my question unless I'm reading it wrong.

回答1:

Here is the solution in a reusable method. Pass in the text value, font used for the cell, summed width of the columns merged, and receive back the row height. Set the row height with the result.

Use of Method

eppWorksheet.Row(2).Height = MeasureTextHeight(cell.Value, cell.Style.Font, [enter the SUM of column widths A-E]);

Reuseable Method

    public double MeasureTextHeight(string text, ExcelFont font, int width)
    {
        if (string.IsNullOrEmpty(text)) return 0.0;
        var bitmap = new Bitmap(1, 1);
        var graphics = Graphics.FromImage(bitmap);

        var pixelWidth = Convert.ToInt32(width * 7.5);  //7.5 pixels per excel column width
        var drawingFont = new Font(font.Name, font.Size);
        var size = graphics.MeasureString(text, drawingFont, pixelWidth);

        //72 DPI and 96 points per inch.  Excel height in points with max of 409 per Excel requirements.
        return Math.Min(Convert.ToDouble(size.Height) * 72 / 96, 409);
    }

回答2:

I have used a workaround for this and I a had print area A:Q.

I copied merged cells value to column z.
set width of column z to merge cells width.
Then set auto row height true in format.
Hide the z column.
Set print area A:Q

Cons: There are duplicate data. But we are okay since report is printing and not print z column.

Pros: Row height works correctly not like calculation method.

回答3:

Had to tweak the code a little bit by removing the multiplication factor at the return line. May be because i am using this code to get the width of the column.

ws1.Column(colIndx).Width * 7

The multiplication factor is the number of columns been merged.

来源：https://stackoverflow.com/questions/41639278/autofit-row-height-of-merged-cell-in-epplus

标签

excel

epplus