Hi,
I need to calculate the height of a datagridview row before it is created, but I can't figure out how to do it. I am trying to fill a datagridview with only as many rows as will fit. In order to do that I need to know how tall the rows are going to be.
I guess I could create the first row and then measure it, but I figured there had to be a more elegant way to do it.
Thanks in advance.
Lee
I tried that and it didn't seem to work. Using the default font, font size and other settings, I know that the row height should be 20 but the RowTemplate.Height shows 22. When I change the font size to a much larger font, the RowTemplate.Height stays at 22.
Am I missing a step when I initialize the DataGridView? Is there something I need to do to force the DataGridView to update the RowTemplate to reflect the current font and other settings? I have tried modifying DataGridView.Font, DataGridView.DefaultCellStyle.Font and DataGridView.RowTemplate.DefaultCellStyle.Font.
Lee
as Column).width), MakeFromCellStyle(mainDataGridView.DefaultCellStyle)) + 5; You'll note there's a fudge factor (5) added as the text height includes neither vertical margins nor the cell border.
Hope this helps
Mike
PS: here's the code to generate the TextFormatFlags needed for MeasureTextHeight
// generate TextFormatFlags from a DataGridViewCellStyle // found at http://mnow.wankuma.com/cs2005_datagridview_control7.html (text in Japanese except for code) private TextFormatFlags MakeFromCellStyle(DataGridViewCellStyle style){
TextFormatFlags flags = new TextFormatFlags(); switch (style.Alignment){
case DataGridViewContentAlignment.TopLeft: flags |= TextFormatFlags.Top | TextFormatFlags.Left; break; case DataGridViewContentAlignment.TopCenter: flags |= TextFormatFlags.Top | TextFormatFlags.HorizontalCenter; break; case DataGridViewContentAlignment.TopRight: flags |= TextFormatFlags.Top | TextFormatFlags.Right; break; case DataGridViewContentAlignment.MiddleLeft: flags |= TextFormatFlags.HorizontalCenter | TextFormatFlags.Left; break; case DataGridViewContentAlignment.MiddleCenter: flags |= TextFormatFlags.HorizontalCenter | TextFormatFlags.HorizontalCenter; break; case DataGridViewContentAlignment.MiddleRight: flags |= TextFormatFlags.HorizontalCenter | TextFormatFlags.Right; break; case DataGridViewContentAlignment.BottomLeft: flags |= TextFormatFlags.Bottom | TextFormatFlags.Left; break; case DataGridViewContentAlignment.BottomCenter: flags |= TextFormatFlags.Bottom | TextFormatFlags.HorizontalCenter; break; case DataGridViewContentAlignment.BottomRight: flags |= TextFormatFlags.Bottom | TextFormatFlags.Right; break;}
if (style.WrapMode == DataGridViewTriState.True) flags |= TextFormatFlags.WordBreak; return flags;}
Actually, I don't want to set the row height. I want to determine what it is. For example, if the user selects a really large font then a minimum row height of 23 is not going to work. I want the datagridview to continue calculating the appropriate row height based on the font size and other settings. I just want to know what that calculated value it.
Lee
