错误延伸AdvancedDataGridRenderer

当我已经设置的itemRenderer包那样：错误延伸AdvancedDataGridRenderer

包myrenderers { 进口mx.controls.advancedDataGridClasses.AdvancedDataGridItemRenderer;

public class theHeaderRenderer extends AdvancedDataGridItemRenderer 
{ 
    public function theHeaderRenderer() 
    { 
     super(); 
     setStyle("verticalAlign","middle"); 
    } 
}

}

但是当我包括我的AdvancedDataGridColumn标签以下行，

  <fx:Component> 
       <myrenderers:theHeaderRenderer"/> 
      </fx:Component> 

     </mx:headerRenderer>

  <fx:Component> 
       <renderers:someotherrenderer/> 
      </fx:Component> 

     </mx:itemRenderer>

我得到以下错误：

TypeError: Error #1034: Type Coercion failed: cannot convert mx.controls.dataGridClasses::[email protected] to mx.controls.advancedDataGridClasses.AdvancedDataGridListData. at mx.controls.advancedDataGridClasses::AdvancedDataGridItemRenderer/set listData()[E:\dev\4.x\frameworks\projects\datavisualization\src\mx\controls\advancedDataGridClasses\AdvancedDataGridItemRenderer.as:232] at mx.controls::DataGrid/http://www.adobe.com/2006/flex/mx/internal::calculateHeaderHeight()[E:\dev\4.x\frameworks\projects\framework\src\mx\controls\DataGrid.as:2182] at mx.controls.dataGridClasses::DataGridHeader/measure()[E:\dev\4.x\frameworks\projects\framework\src\mx\controls\dataGridClasses\DataGridHeader.as:201] at mx.core::UIComponent/measureSizes()[E:\dev\4.x\frameworks\projects\framework\src\mx\core\UIComponent.as:8216] at mx.core::UIComponent/validateSize()[E:\dev\4.x\frameworks\projects\framework\src\mx\core\UIComponent.as:8140] at mx.managers::LayoutManager/validateSize()[E:\dev\4.x\frameworks\projects\framework\src\mx\managers\LayoutManager.as:617] at mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\4.x\frameworks\projects\framework\src\mx\managers\LayoutManager.as:709] at mx.managers::LayoutManager/doPhasedInstantiationCallback()[E:\dev\4.x\frameworks\projects\framework\src\mx\managers\LayoutManager.as:1072]

任何人都可以建议我怎么会遇到这个问题？

谢谢

来源

2011-03-28 flexyBoy

首先，我建议你从AdvancedDataGridHeaderRenderer而不是AdvancedDataGridItemRenderer延长您的自定义的HeaderRenderer。

其次，它看起来像你在混合mx:DataGrid和mx:AdvancedDataGrid。我想这是你的类型强制错误的原因。确保你的MXML看起来像这样：

<mx:AdvancedDataGrid> 
    <mx:columns> 
     <mx:AdvancedDataGridColumn dataField="foo" headerRenderer="myrenderers.theHeaderRenderer"/> 
    </mx:columns> 
</mx:AdvancedDataGrid>

来源

2011-03-28 13:17:43

错误延伸AdvancedDataGridRenderer

回答

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