C#迭代的DataGridView和更改行的颜色(C# Iterate Over DataGridV

2019-06-24 22:11发布

我有多个行和列组成一个DataGridView。 我想通过每一行迭代和检查特定列的内容。 如果该列包含单词“NO”,我想改变整行红色的前景色。 下面是一些代码的尝试,但迄今为止它肯定不是工作,开始不知道如果我需要每一个细胞遍历?

码:

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,然后做的东西

ASPX(网格):

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

后面的代码:

    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的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:

在您的DataGridView,处理CellFormatting事件:

dataGridView1.CellFormatting += new DataGridViewCellFormattingEventHandler(dataGridView1_CellFormatting);

然后,您的事件处理程序看起来是这样的:

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;  
}

这样在你行不“迭代” - 简单地改变与它们涂上颜色/绘制时,他们变得可见(因此需要格式化)在网格中。



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:

是否有可能有空格或其它字符的单元格的值的一部分? 如果是这样尝试使用包含方法,而不是直接的平等。

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


Answer 5:

这是的WinForms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:

此代码工作正常,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;
    }
}

除了铸造作为一个字符串,而不是调用toString我真的不看任何区别,因此可能是一个大小写错误。 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;
}


文章来源: C# Iterate Over DataGridView & Change Row Color