如何在DataGridView中突出显示搜索文本?

时间:2016-08-05 12:00:05

标签: c# winforms datagridview highlighting

我想在DataGridView中突出显示给定的搜索文本。我已尝试使用cellFormatting事件来查找searchtext的边界并绘制FillRectangle,但我无法准确获取搜索文本的边界。

enter image description here

在添加的图像中,我试图突出显示文字“o”,但它也突出显示其他字符。

任何人都可以与我分享如何绘制完美的矩形以突出显示搜索到的文本。

此致 Amal Raj。

1 个答案:

答案 0 :(得分:3)

您需要使用CellPainiting事件。试试这段代码:

string keyValue = "Co"; //search text

    private void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
    {
        if (e.Value == null) return;

        StringFormat sf = StringFormat.GenericTypographic;
        sf.FormatFlags = sf.FormatFlags | StringFormatFlags.MeasureTrailingSpaces | StringFormatFlags.DisplayFormatControl;
        e.PaintBackground(e.CellBounds, true);

        SolidBrush br = new SolidBrush(Color.White);
        if (((int)e.State & (int)DataGridViewElementStates.Selected) == 0)
            br.Color = Color.Black;

        string text = e.Value.ToString();
        SizeF textSize = e.Graphics.MeasureString(text, Font, e.CellBounds.Width, sf);

        int keyPos = text.IndexOf(keyValue, StringComparison.OrdinalIgnoreCase);
        if (keyPos >= 0)
        {
            SizeF textMetricSize = new SizeF(0, 0);
            if (keyPos >= 1)
            {
                string textMetric = text.Substring(0, keyPos);
                textMetricSize = e.Graphics.MeasureString(textMetric, Font, e.CellBounds.Width, sf);
            }

            SizeF keySize = e.Graphics.MeasureString(text.Substring(keyPos, keyValue.Length), Font, e.CellBounds.Width, sf);
            float left = e.CellBounds.Left + (keyPos <= 0 ? 0 : textMetricSize.Width) + 2;
            RectangleF keyRect = new RectangleF(left, e.CellBounds.Top + 1, keySize.Width, e.CellBounds.Height - 2);

            var fillBrush = new SolidBrush(Color.Yellow);
            e.Graphics.FillRectangle(fillBrush, keyRect);
            fillBrush.Dispose();
        }
        e.Graphics.DrawString(text, Font, br, new PointF(e.CellBounds.Left + 2, e.CellBounds.Top + (e.CellBounds.Height - textSize.Height) / 2), sf);
        e.Handled = true;

        br.Dispose();
    }