具有WrapMode的TextCell上DataGridView中的TextHighlight [英] TextHighlight in DataGridView on TextCell with WrapMode

问题描述

在WinForm上的DataGridView中，我有:

in a DataGridView on WinForm i have :

dataGridViewAnzeige.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.DisplayedCells;
dataGridViewAnzeige.DefaultCellStyle.WrapMode = DataGridViewTriState.True;

要绘制背景，我要在CellPainting上绘制它，我的搜索执行拆分搜索"过滤更多结果

to paint the background i do it at the CellPainting, my search doing a "split search" to filter more results

但是包装文字的测量失败了，有什么主意吗?

but the measuring of the Wraped Text is faild, any ideas ?

第二行的位置失败..

the position on the second line fails ..

private void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
    {
     if (e.RowIndex > -1 && e.ColumnIndex > -1 && dataGridView1.Columns[e.ColumnIndex].Name != "Id")
            {
                var suchtext = searchStringTextBox.Split(null);
                List<Rectangle> rectangleList = new List<Rectangle>();

                // Check data for search  
                if (!String.IsNullOrWhiteSpace(searchStringTextBox.Trim()))
                {
                    foreach (var txtSuche in suchtext)
                    {
                        String gridCellValue = e.FormattedValue.ToString();
                        // check the index of search text into grid cell.  
                        int startIndexInCellValue = gridCellValue.ToLower().IndexOf(txtSuche.Trim().ToLower());
                        // IF search text is exists inside grid cell then startIndexInCellValue value will be greater then 0 or equal to 0  
                        if (startIndexInCellValue >= 0)
                        {
                            e.Handled = true;
                            e.PaintBackground(e.CellBounds, true);
                            //the highlite rectangle  
                            Rectangle hl_rect = new Rectangle();
                            hl_rect.Y = e.CellBounds.Y + 2;
                            
                            //find the size of the text before the search word in grid cell data.  
                            String sBeforeSearchword = gridCellValue.Substring(0, startIndexInCellValue);
                            //size of the search word in the grid cell data  
                            String sSearchWord = gridCellValue.Substring(startIndexInCellValue, txtSuche.Trim().Length);
                            Size s1 = TextRenderer.MeasureText(e.Graphics, sBeforeSearchword, e.CellStyle.Font, e.CellBounds.Size, TextFormatFlags.TextBoxControl);
                            Size s2 = TextRenderer.MeasureText(e.Graphics, sSearchWord, e.CellStyle.Font, e.CellBounds.Size, TextFormatFlags.TextBoxControl);
                            if (s1.Width > 5)
                            {
                                hl_rect.X = e.CellBounds.X + s1.Width - 5;
                                hl_rect.Width = s2.Width - 6;
                            }
                            else
                            {
                                hl_rect.X = e.CellBounds.X + 2;
                                hl_rect.Width = s2.Width - 6;
                            }

                            //fail on textalign in middle
                            hl_rect.Height = s2.Height;

                            rectangleList.Add(hl_rect);

                        }
                    }

                }
                //color for showing highlighted text in grid cell
                SolidBrush hl_brush;
                hl_brush = new SolidBrush(Color.Yellow);
                //paint the background behind the search word 
                foreach(var recto in rectangleList)
                {
                    e.Graphics.FillRectangle(hl_brush, recto);
                }
                
                hl_brush.Dispose();
                e.PaintContent(e.CellBounds);

            }
        }

要绘制背景，我会在CellPainting上进行绘制，我的搜索会进行拆分搜索"，过滤更多结果

to paint the background i do it at the CellPainting, my search doing a "split search" to filter more results

但是包装文字的测量失败了，有什么主意吗?

but the measuring of the Wraped Text is faild, any ideas ?

第二行的位置失败..

the position on the second line fails ..

推荐答案

我有解决方案，请更正或显示更好的解决方案

I've got a solution, please correct or show the better solution

if (s1.Width > 5)
                            {

                                hl_rect.X = e.CellBounds.X + s1.Width - 5;
                                hl_rect.Width = s2.Width - 6;

                                if (s1.Height > s2.Height)
                                {
                                    String breakWord = gridCellValue.Substring(indexOfN, startIndexInCellSecondeRowValue);
                                    Size s3 = TextRenderer.MeasureText(e.Graphics, breakWord, e.CellStyle.Font, e.CellBounds.Size, TextFormatFlags.TextBoxControl);
                                    hl_rect.X = e.CellBounds.X + 2 + s3.Width -7; 
                                    hl_rect.Y = e.CellBounds.Y + s2.Height +2;
                                }

                            }
                            else
                            {
                                hl_rect.X = e.CellBounds.X + 2;
                                hl_rect.Width = s2.Width - 6;
                            }

在我的情况下有效...

it works in my case...

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