Grid单元格着色，设置GridPanel背景色

var colorRenderer = function (value, metadata, record, rowIndex, colIndex, store) {
    if (rowIndex == 1) {
        metadata.style = "background-color: red;";
    }
    return value;
};

<ext:Column runat="server" DataIndex="C_log" Text="log" Flex="1">
    <Renderer Fn="colorRenderer" />
</ext:Column>