Changing BaseStyle in Realtime

[Aaron Jackson]

Greetings,

Excuse my post if it seems a bit simplistic, I''m new to this toolkit. My application sets up a number of BaseStyles that represent my formatting options. The application runs fine the first time through the configuration code block and generates the right StyleInfo (as I can see it displaying properly in the application). Later, I change some "configurable" items and try to apply them to the base styles and I get a NullReferenceException. I cant see that I''m doing anything odd, but here is the code block (it is used the first time [which works] and second time [which fails]).

PreferencesModel model = AppMain.AppPreferencesModel ;
PreferencesModel.FormatState format_state = model.Format ;

m_dataGrid.BeginUpdate() ;

foreach( DictionaryEntry entry in format_state.Attributes )
{
Rule rule = entry.Key as Rule ;
FormatAttributes attributes = entry.Value as FormatAttributes ;
Font font = attributes.Font ;

string ident = rule.m_filter.Ident ;

GridBaseStyle base_style = m_dataGrid.BaseStylesMap[ ident ] ;
GridFontInfo font_info = new GridFontInfo() ;
font_info.Bold = font.Bold ;
font_info.Italic = font.Italic ;
font_info.Facename = font.FontFamily.Name ;
font_info.Size = font.Size ;
font_info.Strikeout = font.Strikeout ;
font_info.Underline = font.Underline ;

base_style.StyleInfo.BeginUpdate() ;
base_style.StyleInfo.BackColor = attributes.Background ;
base_style.StyleInfo.TextColor = attributes.Foreground ;
base_style.StyleInfo.Font = font_info ;
base_style.StyleInfo.EndUpdate() ;
}

m_dataGrid.Model.ResetVolatileData() ;
m_dataGrid.EndUpdate() ;

Here is the exception:

System.NullReferenceException: Object reference not set to an instance of an object.
at Syncfusion.Styles.StyleInfoStore.get_IsEmpty()
at Syncfusion.Styles.StyleInfoBase.get_IsEmpty()
at Syncfusion.Styles.StyleInfoIdentityBase.GetBaseStyleNotEmptyExpandable(IStyleInfo thisStyleInfo, StyleInfoProperty sip)
at Syncfusion.Windows.Forms.Grid.GridStyleInfo.get_GdipFont()
at Syncfusion.Windows.Forms.Grid.GridStaticCellRenderer.OnDraw(Graphics g, Rectangle clientRectangle, Int32 rowIndex, Int32 colIndex, GridStyleInfo style)
at Syncfusion.Windows.Forms.Grid.GridCellRendererBase.Draw(Graphics g, Rectangle cellRectangle, Int32 rowIndex, Int32 colIndex, GridStyleInfo style)
at Syncfusion.Windows.Forms.Grid.GridStaticCellRenderer.Draw(Graphics g, Rectangle cellRectangle, Int32 rowIndex, Int32 colIndex, GridStyleInfo style)
at Syncfusion.Windows.Forms.Grid.GridControlBase.OnDrawItem(Graphics g, Int32 rowIndex, Int32 colIndex, Rectangle rectItem, GridStyleInfo style)
catched at Syncfusion.Windows.Forms.Grid.GridControlBase.OnDrawItem(Graphics g, Int32 rowIndex, Int32 colIndex, Rectangle rectItem, GridStyleInfo style) in :line 0
catched at Syncfusion.Windows.Forms.Grid.GridControlBase.OnDrawItem(Graphics g, Int32 rowIndex, Int32 colIndex, Rectangle rectItem, GridStyleInfo style) in :line 0

[Administrator]

Instead of

GridFontInfo font_info = new GridFontInfo();

try using

GridFontInfo font_info = base_style.StyleInfo.Font;

Ie., modify the fontinfo object present in the basestyle, and not set a new (almost empty with a some default properties set) that loses some ID settings.

[Aaron Jackson]

Thank you for the quick response, that fixed my issue.