[Solved] Changing row colors in RowLoaded event not working

[Barry]

 

Hello,

I am currently modifying row colors in my Grid when the row content meets the specific text that I want. The code works perfectly when the data is not that big. But if I have sufficient number of rows that triggers a scroll bar, every time I scroll down, the color gets assigned randomly to the new rows even if the row did not meet the criteria.

Below is the code.


private void gvMain_RowLoaded(object sender, RowLoadedEventArgs e)

 

{

 

 

var a = e.Row as GridViewRow;

 

 

if (a != null)

 

{

 

if ((a.Cells[0].Content.ToString() == "Tittle1") || (a.Cells[0].Content.ToString() == "Tittle2") || (a.Cells[0].Content.ToString() == "Tittle3")||(a.Cells[0].Content.ToString()=="Tittle4"))

 

{

a.Height = 35;

a.Background =

new SolidColorBrush(Colors.LightGray);

 

a.FontSize = 15;

a.FontWeight=

FontWeights.Bold;

 

}

 

else if

 

 

//Set row color of cells

 

((a.Cells[0].Content.ToString() ==

"Private") || (a.Cells[0].Content.ToString() == "Public"))

 

{

a.Height = 25;

a.Background =

new SolidColorBrush(Colors.Blue);

 

a.FontSize = 12;

a.FontWeight =

FontWeights.Bold;

 

}

 

else

 

{

a.FontWeight =

FontWeights.Bold;

 

}

 

}

 

}


Please advice

[Yavor Georgiev]

Hello Barry,

 This happens because of virtualization - in order to preserve memory, rows are recycled so that if you set an explicit property on a row and this row is recycled, the property won't be cleared. I suggest you use the RowStyleSelector property of RadGridView with a custom StyleSelector.

Greetings,
Yavor Georgiev
the Telerik team

[JR]

Hello Yavor, 

    Are there other ways to go around the issue other than using the RowStyleSelector property? I'm asking because im using an older version of the control. Base from http://blogs.telerik.com/vladimirenchev/posts/10-04-01/conditional_styles_and_templates_with_radgridview_for_silverlight_and_wpf.aspx, StyleSelector was added Q1 2010 Service Pack 1.

Thanks in Advance.

[Yavor Georgiev]

Hello JR,

 You can use RowLoaded to set the color, but you have to reset the Background property first. Example:

var row = e.Row as GridViewRow;
row.Background = null;

if (myPredicate)
{
   row.Background = myBrush;
}

Regards,
Yavor Georgiev
the Telerik team

[JR]

I made i little modification and the code worked. For some reason i need to check if the row is not null otherwise it will encounter a nullexception error. Thanks Yavor for the help.

var a = e.Row as GridViewRow;

if (a != null)
{
    a.Background = null;
    if(myPredicate)
    {
         row.Background = myBrush;
    }
}