Question

我有一个数据的数据网格视图，数据行是彩色的（仅文本着色）如下：红色，橙色和黑色例如：

private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
  switch (e.Value.ToString())
            {
                case "SDP":
                    e.Value = "Schedule Departure";
                    this.dataGridView1.Rows[e.RowIndex].DefaultCellStyle.ForeColor = Color.Red;
                    break;
                case "CKN":
                    e.Value = "Check-In";
                    this.dataGridView1.Rows[e.RowIndex].DefaultCellStyle.ForeColor = Color.Orange;
                    break;
                case "P2G":
                    e.Value = "Proceed to Gate";
                    this.dataGridView1.Rows[e.RowIndex].DefaultCellStyle.ForeColor = Color.Black;
                    break;
}

我还创建了包含少量单选按钮的Groupbox来更改支持

    private void radioButton1_CheckedChanged(object sender, EventArgs e)
    {
        ListSortDirection direction;
        direction = ListSortDirection.Ascending;
        dataGridView1.Sort(arrTimeDataGridViewTextBoxColumn,direction);
    }

但问题是：如何根据文本的颜色更改排序，例如：RED，ORANGE然后是Black？

Answer 1

在datagridview中创建一个列，您可以在其中保留一些ForeColor。例如：

列将命名为dataGridView_ForeColorNum，值将显示为下一个：

RED = 1
ORANGE = 2
BLACK = 3

然后在处理程序dataGridView1_CellFormatting中设置此值同时更改行的ForeColor

cswitch (e.Value.ToString())
{
    case "SDP":
        e.Value = "Schedule Departure";
        this.dataGridView1.Rows[e.RowIndex].DefaultCellStyle.ForeColor = Color.Red;
        this.dataGridView1.Rows[e.RowIndex].Cells[dataGridView_ForeColorNum.Name].Value = 1;     
        break;
    case "SKN":
        e.Value = "Check-In";
        this.dataGridView1.Rows[e.RowIndex].DefaultCellStyle.ForeColor = Color.Orange;
        this.dataGridView1.Rows[e.RowIndex].Cells[dataGridView_ForeColorNum.Name].Value = 2;
        break;
    case "P2G":
        e.Value = "Proceed to gate";
        this.dataGridView1.Rows[e.RowIndex].DefaultCellStyle.ForeColor = Color.Black;
        this.dataGridView1.Rows[e.RowIndex].Cells[dataGridView_ForeColorNum.Name].Value = 3;            break;


}

排序将正常，但用于对具有ForeColor的数字的新列进行排序：

 private void radioButton1_CheckedChanged(object sender, EventArgs e)
 {
     ListSortDirection direction;
     direction = ListSortDirection.Ascending;
     dataGridView1.Sort(dataGridView_ForeColorNum,direction);
 }

对于数据绑定DataGridView以前的解决方案将无法工作，因为预定义列的属性IsDataBound = False。 MSDN:datagridview.Sort

在这种情况下，我想到的第一个解决方案是：

在您的SQL查询中添加一个列，您可以使用ForeColor语句设置CASE WHEN号码：

CASE yourValueColumn
WHEN 'SDP' THEN 1
WHEN 'SKN' THEN 2
WHEN 'P2G' THEN 3
ELSE 0 END AS ForeColor

在datagridview的预定义列dataGridView_ForeColorNum中，设置属性DataProperty = "ForeColor"和datagridview_CellFormatting处理程序将如下所示：

{
    if(this.datagridview1.Columns[e.ColumnIndex].Name != this.dataGridView_ForeColorNum.Name)
        return;
    //if column is ForeColumn then set a ForeColor independent on the column value
    switch ((int)e.Value)
    {
        case 1: //SDP
            e.Value = "Schedule Departure";
            this.dataGridView1.Rows[e.RowIndex].DefaultCellStyle.ForeColor = Color.Red;     
            break;
        case 2: //SKN
            e.Value = "Check-In";
            this.dataGridView1.Rows[e.RowIndex].DefaultCellStyle.ForeColor = Color.Orange;
            break;
        case 3: //P2G
            e.Value = "Proceed to gate";
            this.dataGridView1.Rows[e.RowIndex].DefaultCellStyle.ForeColor = Color.Black;
            break;
    }
}

按Fore Text Color排序dataGridView列

1 个答案: