DataGridView changing cell background color

Question

I have the following code    private void dgvStatus DataBindingComplete object sender  DataGridViewBindingCompleteEventArgs e        foreach  DataGridViewRow row in dgvStatus Rows                row Cells color Index  Style BackColor   Color FromArgb   GesTest dsEssais FMstatusAnomalieRow row DataBoundItem  iColor             I am trying to set the background color of each cell from the background color column  this doesn t work the color never change  Any idea of why   I ve been looking around but didn t found anything usefull

User · Answer

dataGridView1 row  col  Style BackColor   System Drawing Color Red

User · Answer

protected void grdDataListeDetay RowDataBound object sender  GridViewRowEventArgs e        if  e Row RowType    DataControlRowType DataRow                if  e Row Cells 3  Text     0                         for  int i   0  i  lt   e Row Cells Count - 1  i                                  e Row Cells i  BackColor   System Drawing Color Beige

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int rowscount   dataGridView1 Rows Count            for  int i   0  i  lt  rowscount  i                      if    dataGridView1 Rows i  Cells 8  Value    null                 dataGridView1 Rows i  Cells 8  Style BackColor   Color LightGoldenrodYellow

User · Answer

Similar as shown and mentioned   Notes  Take into consideration that Cells will change their color  only  after the DataGridView Control is Visible  Therefore one practical solution would be using the      VisibleChanged Event   In case you wish to keep your style when creating new Rows  also subscribe the      RowsAdded Event   Example bellow       lt summary gt  Instantiate the DataGridView Control   lt  summary gt  private DataGridView dgView   new DataGridView       lt summary gt  Method to configure DataGridView Control   lt  summary gt  private void DataGridView Configuration            In this case the method just contains the VisibleChanged event subscription       dgView VisibleChanged    DgView VisibleChanged          Uncomment line bellow in case you want to keep the style when creating new rows         dgView RowsAdded    DgView RowsAdded         lt summary gt  The actual Method that will re-design  Paint  DataGridView Cells   lt  summary gt   private void DataGridView PaintCells           int nrRows   dgView Rows Count       int nrColumns   dgView Columns Count       Color green   Color LimeGreen           Iterate over the total number of Rows      for  int row   0  row  lt  nrRows  row                       Iterate over the total number of Columns          for  int col   0  col  lt  nrColumns  col                                Paint cell location  column  row               dgView col  row  Style BackColor   green                            lt summary gt  The DataGridView VisibleChanged Event   lt  summary gt  private void DataGridView VisibleChanged object sender  EventArgs e        DataGridView PaintCells            lt summary gt  Occurrs when a new Row is Created   lt  summary gt       lt param name  sender  gt  lt  param gt       lt param name  e  gt  lt  param gt  private void DataGridView RowsAdded object sender  DataGridViewRowsAddedEventArgs e         DataGridView PaintCells         Finally  Just call the DataGridView Configuration    method  i e  Form Load Event

User · Answer

I finally managed to get it working  Here the code    private void dgvStatus CellFormatting object sender  DataGridViewCellFormattingEventArgs e        if  e ColumnIndex    color Index          return       e CellStyle BackColor   Color FromArgb int Parse   DataRowView dgvStatus Rows e RowIndex  DataBoundItem  Row 4  ToString          if anyone know a better to do this please don t hesitate to post it  I m open to suggestion

User · Answer

Simply create a new DataGridViewCellStyle object  set its back color and then assign the cell s style to it       DataGridViewCellStyle style   new DataGridViewCellStyle        style BackColor   Color FromArgb   GesTest dsEssais FMstatusAnomalieRow row DataBoundItem  iColor       style ForeColor   Color Black      row Cells color Index  Style   style

User · Answer

You can use the VisibleChanged event handler   private void DataGridView1 VisibleChanged object sender  System EventArgs e        var grid   sender as DataGridView      grid Rows 0  Cells 0  Style BackColor   Color Yellow

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dataGridView1 Rows i  Cells 7  Style BackColor   Color LightGreen

User · Answer

try the following  in RowDataBound method of GridView      protected void GridViewUsers RowDataBound object sender  GridViewRowEventArgs e           this will only change the rows backgound not the column header       if  e Row RowType    DataControlRowType DataRow                e Row Cells 0  BackColor   System Drawing Color LightCyan    first col         e Row Cells 1  BackColor   System Drawing Color Black     second col

User · Answer

If you are still intrested in why this didn t work for you at first   The reason you don t see changes you ve made to the cell s style is because you do these changes before the form was shown  and so they are disregarded   Changing cell styles in the events suggested here will do the job  but they are called multiple times causing your style changes to happen more times than you wish  and so aren t very efficient   To solve this  either change the style after the point in your code in which the form is shown  or subscribe to the Shown event  and place your changes there  this is event is called significantly less than the other events suggested

[c#] DataGridView changing cell background color

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