c# - Add and remove CssClass ASP.NET -

i have weird behavior asp.net application. want change color of current selected row in grid view.

my gridview defined :

<asp:gridview [..] onselectedindexchanged="supresultlist_selectedindexchanged">     [..]     <rowstyle cssclass="datagriditem" />     <alternatingrowstyle cssclass="datagridalternateitem" /> </asp:gridview> 

in code-behind, have :

protected void supresultlist_selectedindexchanged(object sender, eventargs e) {     gridview grid = sender gridview;      // remove class "selected" older row     foreach (gridviewrow row in grid.rows)     {         row.cssclass = row.cssclass.replace("adminrowselected", string.empty);     }      grid.selectedrow.cssclass = string.join(" ", grid.selectedrow.cssclass, "adminrowselected"); } 

may there better way want ?

anyway, when gridview first rendered, rows have classes. when select row , enter in supresultlist_selectedindexchanged, row.cssclass empty (so result of row.cssclass.replace("adminrowselected", string.empty) "" , string.join(" ", grid.selectedrow.cssclass, "adminrowselected"); "adminrowselected"). after processing lose original class , rows become white (except selected row).

i tried instead of loop failed :

grid.rowstyle.cssclass = "datagriditem"; grid.alternatingrowstyle.cssclass = "datagridalternateitem"; 

do have idea of happening (and how correct ^^) ?

thanks in advance !

have tried selectedrowstyle?

http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.gridview.selectedrowstyle.aspx