使用列过滤器时如何保留 DataGridView 颜色信息（单元格和文本）？

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如何解决使用列过滤器时如何保留 DataGridView 颜色信息（单元格和文本）？？

我在我的项目中使用 AdvancedDataGrIDVIEw。我可以使用右键菜单更改我想要的单元格（和文本）颜色，但是当我使用列过滤器时，所有这些颜色信息都丢失了。即使我移除过滤器，这些颜色信息也不会回到原来的位置。 我设计了一个类，用于在打开/退出应用程序时保存/加载 DGV 颜色信息：

      public static voID WriteDataGrIDVIEwSetTings(System.windows.Forms.DataGrIDVIEw dgv)
    {
        XmlTextWriter writer = new XmlTextWriter(Application.StartupPath + @"\MyGrIDcolor.xml",null);
        writer.WriteStartdocument();
        writer.WriteStartElement(dgv.Name);
        int LastRow = dgv.Rows.Count;
        for (int i = 0; i < LastRow; i++)
        {
            writer.WriteStartElement("Row");
            writer.WriteStartElement("Cellcolor");
            writer.WriteString(dgv.Rows[i].DefaultCellStyle.BACkcolor.ToArgb().ToString());
            writer.WriteEndElement();
            writer.WriteStartElement("Textcolor");
            writer.WriteString(dgv.Rows[i].DefaultCellStyle.Forecolor.ToArgb().ToString());
            writer.WriteEndElement();
            writer.WriteEndElement();
        }
        writer.WriteEndElement();
        writer.WriteEnddocument();
        writer.Close();
    }

    public static voID ReadDataGrIDVIEwSetTings(System.windows.Forms.DataGrIDVIEw dgv)
    {
        Xmldocument xmldoc = new Xmldocument();
        XmlNodeList xmlnode;
        fileStream fs = new fileStream(Application.StartupPath + @"\MyGrIDcolor.xml",fileMode.open,fileAccess.Read);
        xmldoc.Load(fs);
        xmlnode = xmldoc.GetElementsByTagname("Row");
            for (int i = 0; i <= xmlnode.Count-1; i++)
            {
                int cellcolor = int.Parse(xmlnode[i].ChildNodes.Item(0).InnerText.Trim());
                int textcolor = int.Parse(xmlnode[i].ChildNodes.Item(1).InnerText.Trim());
                if (cellcolor != 0)
                {
                    dgv.Rows[i].DefaultCellStyle.BACkcolor = color.FromArgb(Convert.ToInt32(cellcolor));
                    dgv.Rows[i].DefaultCellStyle.Forecolor = color.FromArgb(Convert.ToInt32(textcolor));
                }
                else
                {
                    dgv.Rows[i].DefaultCellStyle.BACkcolor = color.White;
                    dgv.Rows[i].DefaultCellStyle.Forecolor = color.black;
                }
            }
        fs.Close();
    }

因为上面提到的问题，我在使用过滤器退出应用程序后不小心丢失了我的颜色信息。

解决方法

public partial class Form1 : Form
{
    Bindingsource _bs = new Bindingsource();
    
    //If you want to store associated colours for each row
    //expand this to whatever data structure you prefer
    List<int> _colourRows = new List<int>();

    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender,EventArgs E)
    {
        //This is the normal data from,for example,a database
        DataTable table = ExampleData();

        //Now add an extra column and put some unique numbers in the datatable
        //We do it to the underlying data
        //If your data already has a unique index or sequence you don't need to do this
        table.columns.Add("sequencecolumn",typeof(int));
        for (int i = 0; i <= table.Rows.Count - 1; i++)
        {
            table.Rows[i]["sequencecolumn"] = i;
        }

        //Bind data to the UI
        _bs.Datasource = table;
        dgv.Datasource = _bs;

        //Hide this column from UI
        dgv.columns["sequencecolumn"].Visible = false;
        dgv.SELEctionMode = DataGridViewSELEctionMode.FullRowSELEct;
    }

    private void setColourToolStripMenuItem_Click(object sender,EventArgs E)
    {
        foreach (DataGridViewRow dr in dgv.SELEctedRows)
        {
            //Add it to the list and also update it immediately
            _colourRows.Add((int)dr.Cells["sequencecolumn"].value);
            dr.DefaultCellStyle.BACkColor = Color.Red;
        }
    }

    private void dgv_RowPrePaint(object sender,DataGridViewRowPrePaintEventArgs E)
    {
        //The key is that this isn't the rows position index (which could change with filtering sorTing)
        //it is just a value we've added to a new column for each row
        int rowColourSequence = (int)dgv.Rows[e.RowIndex].Cells["sequencecolumn"].Value;

        if (_colourRows.Contains(rowColourSequencE))
        {
            dgv.Rows[e.RowIndex].DefaultCellStyle.BACkColor = Color.Red;
        }
    }

    private DataTable ExampleData()
    {
        DataTable table = new DataTable();
        table.columns.Add("Animal",typeof(String));
        table.columns.Add("Count",typeof(int));

        table.Rows.Add("Cat",15);
        table.Rows.Add("Dog",10);
        table.Rows.Add("Ferret",2);
        table.Rows.Add("Mouse",0);

        return table;
    }
}

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