C#迭代DataGridView并更改行颜色

Question

我有一个由多行和多列组成的datagridview.我想迭代每一行并检查特定列的内容.如果该列包含单词"NO",我想将整行的前景颜色更改为红色.到目前为止,这是对某些代码的尝试,但它肯定不起作用,开始怀疑我是否需要迭代每个单元格？

码:

foreach (DataGridViewRow dgvr in dataGridView1.Rows)
        {
            if (dgvr.Cells["FollowedUp"].Value.ToString() == ("No"))
            {
                dgvr.DefaultCellStyle.ForeColor = Color.Red;
            }
        }

Answer 1

挂起OnRowDataBound事件然后做东西

ASPX(网格):

    <asp:.... OnRowDataBound="RowDataBound"..../>

代码背后:

    protected void RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowIndex == -1)
        {
            return;
        }

        if(e.Row.Cells[YOUR_COLUMN_INDEX].Text=="NO"){
             e.Row.BackColor=Color.Red;   
        }
    }

对于WinForms:

hook the **DataBindingComplete** event and do stuff in it:

     private void dataGridView1_DataBindingComplete(object sender, 
                       DataGridViewBindingCompleteEventArgs e)
    {
        if (e.ListChangedType != ListChangedType.ItemDeleted)
        {
            DataGridViewCellStyle red = dataGridView1.DefaultCellStyle.Clone();
            red.BackColor=Color.Red;

            foreach (DataGridViewRow r in dataGridView1.Rows)
            {
                if (r.Cells["FollowedUp"].Value.ToString()
                       .ToUpper().Contains("NO"))
                {
                    r.DefaultCellStyle = red;
                }
            }
        }
    }

Answer 2

在DataGridView上,处理CellFormatting事件:

dataGridView1.CellFormatting += new DataGridViewCellFormattingEventHandler(dataGridView1_CellFormatting);

您的事件处理程序可能如下所示:

private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{       
    if(dataGridView1.Columns[e.ColumnIndex].Name == "FollowedUp" && e.Value != null && e.Value.ToString() == "No")
        dataGridView1.Rows[e.RowIndex].DefaultCellStyle.ForeColor = Color.Red;  
}

通过这种方式,您不会在行上"迭代" - 只需更改它们在网格中可见(因此需要格式化)时绘制/绘制的颜色.

Answer 3

public void ColourChange()
    {
        DataGridViewCellStyle RedCellStyle = null;
        RedCellStyle = new DataGridViewCellStyle();
        RedCellStyle.ForeColor = Color.Red;
        DataGridViewCellStyle GreenCellStyle = null;
        GreenCellStyle = new DataGridViewCellStyle();
        GreenCellStyle.ForeColor = Color.Green;


        foreach (DataGridViewRow dgvr in dataGridView1.Rows)
        {
            if (dgvr.Cells["FollowedUp"].Value.ToString().Contains("No"))
            {
                dgvr.DefaultCellStyle = RedCellStyle;
            }
            if (dgvr.Cells["FollowedUp"].Value.ToString().Contains("Yes"))
            {
                dgvr.DefaultCellStyle = GreenCellStyle;
            }
        }
    }