CODEWITHSUNDEEP
c#winformsvisual-studiodevexpress
poudigne
poudigne

Reputation: 1766

how to change Devexpress Grid Row color without event

I have a form with a UserControl containing a grid of a vehicle list and I want to pass a List of vehicle IDs and a color to method and in that method I want to find each Index of the Datasource where the Vehicle ID is in the DataSource.

With those index I want to get the RowHandle (or directly the row object) and change the backcolor with the color I passed in the parameters.

private void ApplyColorRow(List<int> vehicleID, Color color)
{
  var Index = 0;
  // foreach view the Datasource 
  foreach (var View in this.VehicleViewList)
  {
    // if the list of VehicleID contains the vehicleID
    if (vehicleID.Contains(View.VehicleData.VehicleID))
    {
      // find the Row handle corresping to the datasource index
      var RowHandle = this.gvVehicle.GetRowHandle(Index);
      // Get the row object
      // This return an object corresponding to the View (VehicleView in my case)
      // But I need the Row object to change the appearance.
      var Row = this.gvVehicle.GetRow(RowHandle); 
      // Row.BackColor = color;
    }
    Index++;
  }
}

Upvotes: 1

Views: 6360

Answers (2)

Hambone
Hambone

Reputation: 16377

If you have finite number of conditions, you can actually do this without any events (even RowCellStyle), using the format conditions within the Grid designer. If you enter design mode and select "Appearance," and then "Format Conditions," you can add a series of format conditions and their corresponding effect.

There is a property for each format condition called "Apply To Row," where you define a condition for a single column, but the format can either apply only to that column, to other columns or the entire row.

The disadvantage is for each color you need one format condition, unless you hijack the designer code into your form code (which is not necessarily a bad idea).

If System.Color is actually the datatype of one of your properties, and you have an indefinite (or large) number of possibilities, then the RowCellStyle event is the way to go.

By the way, per your last comment, you can always disable RowCellStyle during load and renable it after the Shown event completes.

Upvotes: 0

Jason Z
Jason Z

Reputation: 874

Unless you handle the GridView RowStyle event, any changes you attempt to make will be immediately undone once the grid refreshes itself.

Is there a reason you don't want to use an event to set the row color? You could simply cache what the color of each vehicleID should be, and then set the appropriate color in the RowStyle event.

Here's the DevExpress documentation that outlines customizing row appearances: https://documentation.devexpress.com/#WindowsForms/CustomDocument758

Upvotes: 2

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