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Changing the background color of cells in a DataGrid

, 28 Apr 2002
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How to change the background color of cells in a DataGrid depending on their value
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In this article I want to show how you can change the background color of a specific cells in a datagrid. .To do this you first have to create class derived from DataGridTextBoxColumn or DataGridColumnStyle. You then have to override the Paint() method of these classes. Note that this method has three overloaded versions. 

In this method first you can check the value of cell in the column with the GetColumnValueAtRow method then set the brush you want, fill the cell rectangle then write the text with your proper font. Here is the sample code I used:

protected override void Paint(Graphics g, Rectangle Bounds, CurrencyManager Source,
                              int RowNum, Brush BackBrush, Brush ForeBrush, 
                              bool AlignToRight) 
{
    
    bool bdel = (bool) GetColumnValueAtRow(Source, RowNum);

    if(bdel == true)
        BackBrush = Brushes.Coral;
    else
        BackBrush = Brushes.White;

    g.FillRectangle(BackBrush, Bounds.X, Bounds.Y, Bounds.Width, Bounds.Height);

    System.Drawing.Font font = new Font(System.Drawing.FontFamily.GenericSansSerif, 
                                        (float)8.25 );
    g.DrawString( bdel.ToString(), font, Brushes.Black, Bounds.X, Bounds.Y);
}

Here I use column with a bool value and change the colors for true cells. Here you can change the font for them very easily too. 

You can also change the overall style of the datagrid using the DataGridTableStyle and DataGridColumnStyle classes. The function below demonstrates this:

private void CreateDataGridStyle() 
{
    DataGridColumnStyle GridDelColumn;
    DataGridColumnStyle GridSeqStyle;
    DGStyle = new DataGridTableStyle();  //DGStyle is DataGridTableStyle

    DGStyle.MappingName = "Table1";

    GridSeqStyle = new DataGridTextBoxColumn();
    GridSeqStyle.MappingName = "Column1";
    GridSeqStyle.HeaderText = "Column1";
    GridSeqStyle.Width = 100;
    DGStyle.GridColumnStyles.Add(GridSeqStyle);

    PropertyDescriptorCollection pcol = this.BindingContext[myDataSet, 
                                             "Table1"].GetItemProperties();

    GridDelColumn = new ColumnStyle(pcol["Table1"]);
    GridDelColumn.MappingName = "Column2";
    GridDelColumn.HeaderText = "Column2";
    GridDelColumn.Width = 100;
    DGStyle.GridColumnStyles.Add(GridDelColumn);

    DGStyle.AllowSorting         = true;
    DGStyle.RowHeadersVisible    = true;
}

And after that you  add the styles to datagrid:

CreateDataGridStyle();
myDataGrid.TableStyles.Add(DGStyle);

myDataGrid.SetDataBinding(myDataSet,"Table1");

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About the Author

Mazdak
Web Developer
Iran (Islamic Republic Of) Iran (Islamic Republic Of)
No Biography provided

Comments and Discussions

 
GeneralAlignment PinmemberJohan Hakkesteegt29-May-08 2:21 
QuestionChanging color of datagrid row depending upon column values Pinmemberrizwan127-Mar-08 2:35 
AnswerRe: Changing color of datagrid row depending upon column values PinmemberPeter Felgate29-May-08 2:01 
QuestionHow to fill color for one cell in datagrid with vb.net??? PinmemberMember 437798911-Mar-08 16:45 
Generalcolor from row Pinmemberchehreghany21-Sep-07 22:51 
GeneralThank you for this code Pinmemberdavidbowlby27-Apr-07 11:08 
GeneralChanging the keyboard Pinmemberzazx12-Jul-06 23:32 
Generalhighlighting only the selected text portion of cell PinmemberAnurRS13-Jun-06 1:33 
GeneralType is not defined error PinmemberTotoo1-Jun-06 4:46 
QuestionValue from another cell ? Pinmemberdurtal24-Nov-05 11:16 
AnswerRe: Value from another cell ? PinmemberIce Dragon27-Dec-05 1:13 
Generalcolor an array of rows Pinmemberxrado4-Jul-05 2:33 
General.NET Compact Framework PinmemberJonathan Dudley5-Apr-05 16:16 
GeneralRe: .NET Compact Framework Pinmembermp123418-Jan-07 1:57 
GeneralRe: .NET Compact Framework Pinmemberwebsjwans19-Mar-07 23:39 
GeneralRe: .NET Compact Framework Pinmemberhayles29-Aug-07 23:34 
GeneralAdding the row with various number of columns than the rest PinmemberIvan Milutinovic9-Mar-05 3:33 
QuestionHow to change value Pinmembermtnhan28-Jan-05 18:28 
AnswerRe: How to change value PinmemberMazdak29-Jan-05 23:36 
GeneralRe: How to change value Pinmembermtnhan30-Jan-05 15:00 
GeneralHighlight all cells in a column Pinmembertullm11-Nov-04 5:44 
Generalwin form datagrid PinmemberPradeep K V7-Sep-04 3:55 
GeneralA little abt rows PinmemberSameer Khan11-Mar-03 8:30 
GeneralRe: A little abt rows PinmemberMazdak11-Mar-03 9:35 
GeneralRe: A little abt rows PinmemberSameer Khan12-Mar-03 13:16 
GeneralRe: A little abt rows PinmemberMazdak14-Mar-03 9:56 
GeneralRe: A little abt rows PinmemberMazdak14-Mar-03 9:59 
GeneralRe: A little abt rows PinmemberSameer Khan29-Apr-03 8:39 
GeneralRe: A little abt rows PinmemberMazdak29-Apr-03 21:09 
Generalon a similar note PinmemberSameer Khan10-Mar-03 12:51 
GeneralRe: on a similar note PinmemberSameer Khan10-Mar-03 14:09 
GeneralRe: on a similar note PinmemberSameer Khan12-Mar-03 11:22 
QuestionHow to change the color of text, not the background color, please help Pinsussjasonli16-Sep-02 10:00 
AnswerRe: How to change the color of text, not the background color, please help PinmemberMazdak17-Sep-02 10:06 
AnswerRe: How to change the color of text, not the background color, please help Pinmemberalbean22-Jul-03 18:21 
GeneralSane example PineditorPaul Watson29-Jul-02 6:56 
GeneralRe: Sane example PinmemberMazdak31-Jul-02 10:05 
GeneralLink Broken!!!!!! PinmemberMazdak29-Apr-02 3:13 
GeneralRe: Link Broken!!!!!! PinmemberNish [BusterBoy]29-Apr-02 15:05 
GeneralRe: Link Broken!!!!!! PinmemberMazdak30-Apr-02 6:32 
GeneralRe: Link Broken!!!!!! PinadminChris Maunder29-Apr-02 19:06 
GeneralRe: Link Broken!!!!!! PinmemberMazdak30-Apr-02 4:51 
GeneralRe: Link Broken!!!!!! PinmemberNish [BusterBoy]30-Apr-02 7:08 
GeneralRe: Link Broken!!!!!! PinmemberMazdak30-Apr-02 9:39 
GeneralRe: Link Broken!!!!!! PinmemberNish [BusterBoy]30-Apr-02 15:00 
GeneralRe: Link Broken!!!!!! PinmemberMazdak30-Apr-02 23:07 

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