Question

我有一个由多行和多列组成的数据网格视图。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？

CODE：

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

Answer 1

挂钩 OnRowDataBound 事件，然后执行操作

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;   
        }
    }

FOR 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;
            }
        }
    }

Answer 4

是否可能有空格或其他字符作为单元格值的一部分？如果是这样，请尝试使用Contains方法而不是直接相等。

if (dgvr.Cells["FollowedUp"].Value.ToString().Contains("No"))

Answer 5

这是Winforms的解决方案：

private void HighlightRows()
{
    DataGridViewCellStyle GreenStyle = null;

    if (this.dgridv.DataSource != null)
    {
        RedCellStyle = new DataGridViewCellStyle();
        RedCellStyle.BackColor = Color.Red;

        for (Int32 i = 0; i < this.dgridv.Rows.Count; i++)
        {
            if (((DataTable)this.dgridv.DataSource).Rows[i]["col_name"].ToString().ToUpper() == "NO")
            {
                this.dgridv.Rows[i].DefaultCellStyle = RedCellStyle;
                continue;
            }
        }
    }
}

Answer 6

此代码适用于我：


foreach (DataGridViewRow row in dataGridView1.Rows)
{
    if ((string)row.Cells["property_name"].Value == UNKNOWN_PROPERTY_NAME)
    {
        row.DefaultCellStyle.BackColor = Color.LightSalmon;
        row.DefaultCellStyle.SelectionBackColor = Color.Salmon;
    }
}

除了作为字符串进行强制转换而不是调用ToString之外我没有真正看到任何差异所以它可能是一个区分大小写的错误。尝试使用：

dgvr.Cells["FollowedUp"].Value.ToString().ToUpper() == "NO"

Answer 7

private void Grd_Cust_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
    colorCode == 4 ? Color.Yellow : Color.Brown;
    if (e.RowIndex < 0 || Grd_Cust.Rows[e.RowIndex].Cells["FollowedUp"].Value == DBNull.Value)
        return;
    string colorCode = Grd_Cust.Rows[e.RowIndex].Cells["FollowedUp"].Value.ToString();
    e.CellStyle.BackColor = colorCode == "NO" ? Color.Red : Grd_Cust.DefaultCellStyle.BackColor;
}

C＃迭代DataGridView＆amp;更改行颜色

7 个答案: