Radgrid cell formatting problem

[Karthik]

Hi Telerik,
I have assigned some cols as read only in the radgrid(radform) and i used cell formatting to apply colors like this by name:

DTURradGridView.Columns["dtuct0"].ReadOnly = true;
          DTURradGridView.Columns["dtuct1"].ReadOnly = true;
          DTURradGridView.Columns["dtuct2"].ReadOnly = true;
          DTURradGridView.Columns["dtuct3"].ReadOnly = true;
          DTURradGridView.Columns["dtuy"].ReadOnly = true;

if (e.CellElement.ColumnInfo is GridViewDataColumn)
            {
                if (e.CellElement.ColumnInfo.FieldName == "dtuct0" )
                {
                    e.CellElement.DrawFill = true;
                    e.CellElement.NumberOfColors = 1;
                    e.CellElement.BackColor = Color.LightSlateGray;
                    e.CellElement.GradientStyle = GradientStyles.Linear;
                }
                if (e.CellElement.ColumnInfo.FieldName == "dtuct1")
                {
                    e.CellElement.DrawFill = true;
                    e.CellElement.NumberOfColors = 1;
                    e.CellElement.BackColor = Color.LightSlateGray;
                    e.CellElement.GradientStyle = GradientStyles.Linear;
                }
                if (e.CellElement.ColumnInfo.FieldName == "dtuct2")
                {
                    e.CellElement.DrawFill = true;
                    e.CellElement.NumberOfColors = 1;
                    e.CellElement.BackColor = Color.LightSlateGray;
                    e.CellElement.GradientStyle = GradientStyles.Linear;
                }
                if (e.CellElement.ColumnInfo.FieldName == "dtuct3")
                {
                    e.CellElement.DrawFill = true;
                    e.CellElement.NumberOfColors = 1;
                    e.CellElement.BackColor = Color.LightSlateGray;
                    e.CellElement.GradientStyle = GradientStyles.Linear;
                }
                if (e.CellElement.ColumnInfo.FieldName == "dtuy")
                {
                    e.CellElement.DrawFill = true;
                    e.CellElement.NumberOfColors = 1;
                    e.CellElement.BackColor = Color.LightSlateGray;
                    e.CellElement.GradientStyle = GradientStyles.Linear;
                }
            }

Then i want to hide/unhide based on the selection like this:

private void normalToolStripMenuItem_Click(object sender, EventArgs e)//Normal View
        {
            DTURradGridView.Columns["dtuct0"].IsVisible = false;
            DTURradGridView.Columns["dtuct1"].IsVisible = false;
            DTURradGridView.Columns["dtuct2"].IsVisible = false;
            DTURradGridView.Columns["dtuct3"].IsVisible = false;
            DTURradGridView.Columns["dtuy"].IsVisible = false;

        }



        private void advancedToolStripMenuItem_Click(object sender, EventArgs e) //Advanced View
        {
            DTURradGridView.Columns["dtuct0"].IsVisible = true;
            DTURradGridView.Columns["dtuct1"].IsVisible = true;
            DTURradGridView.Columns["dtuct2"].IsVisible = true;
            DTURradGridView.Columns["dtuct3"].IsVisible = true;
            DTURradGridView.Columns["dtuy"].IsVisible = true;


        }

When i Click on Normal Mode function, it applies colors to other cols. This is really strange for me. Please help me, thank you.

[Emanuel Varga]

Hello,

Because the grid view's cells are virtualized, the grid reuses cell, so you need to reset the colors of the cell if none of the conditions match your case.

// previous code from cell formatting
if (...)
{
     ...
}
else
{
      e.CellElement.ResetValue(LightVisualElement.BackColorProperty, ValueResetFlags.Local);
      // and also reset any other value you have set manually
}

If you have any other questions, please let me know.


Best Regards,
Emanuel Varga
Winforms MVP