根据条件单元格的值改变单元格的显示色块和文字颜色等属性。

#region 设置单元格样式(设置背景色)
/// <summary>
/// 设置单元格样式(设置背景色)
/// </summary>
/// <param name="gridView"></param>
/// <param name="fieldName">"States"；"OrderStatus"</param>
/// <param name="color">Color.Green；Color.FromArgb(30, 119, 194)</param>
/// <param name="expression">表达式(条件)，如[LowPrice] > [PrevPrice]；"AuditStatus=='已审核'"；[Name] != ?</param>
public static void SetStyleFormatCondition(this GridView gridView, string fieldName, Color color, string expression)
{
GridColumn gc = gridView.Columns[fieldName];
StyleFormatCondition condition1 = new DevExpress.XtraGrid.StyleFormatCondition();
condition1.Column = gc;
condition1.Appearance.BackColor = color;
condition1.Appearance.Options.UseBackColor = true;
condition1.Condition = FormatConditionEnum.Expression;
condition1.Expression = expression;
gridView.FormatConditions.Add(condition1);
}
/// <summary>
/// 设置单元格样式(设置背景色)
/// </summary>
/// <param name="gridView"></param>
/// <param name="fieldName">"States"；"OrderStatus"</param>
/// <param name="color">Color.Green；Color.FromArgb(30, 119, 194)</param>
/// <param name="condition">FormatConditionEnum.Equal；None,Equal,NotEqual,Between,NotBetween,Less,Greater,GreaterOrEqual,LessOrEqual,Expression,</param>
/// <param name="conditionValue1">0；"已提交"</param>
/// <param name="conditionValue2">用于两个值取区间</param>
public static void SetStyleFormatCondition(this GridView gridView, string fieldName, Color color, FormatConditionEnum condition, object conditionValue1, object conditionValue2)
{
GridColumn gc = gridView.Columns[fieldName];
StyleFormatCondition condition1;
if (conditionValue2 == null)
{
condition1 = new DevExpress.XtraGrid.StyleFormatCondition(condition, gc, null,
conditionValue1);
}
else
{
condition1 = new DevExpress.XtraGrid.StyleFormatCondition(condition, gc, null,
conditionValue1, conditionValue2);
}
condition1.Appearance.BackColor = color;
condition1.Appearance.Options.UseBackColor = true;
gridView.FormatConditions.Add(condition1);
}
#endregion

#region 设置单元格(字体颜色)
/// <summary>
/// 设置单元格(字体颜色)
/// </summary>
/// <param name="gridView"></param>
/// <param name="fieldName">"States"；"OrderStatus"</param>
/// <param name="color">Color.Green；Color.FromArgb(30, 119, 194)</param>
/// <param name="expression">表达式(条件)，如[LowPrice] > [PrevPrice]；"AuditStatus=='已审核'"；[Name] != ?</param>
public static void SetStyleFormatFontCondition(this GridView gridView, string fieldName, Color color, string expression)
{
GridColumn gc = gridView.Columns[fieldName];
StyleFormatCondition condition1 = new DevExpress.XtraGrid.StyleFormatCondition();
condition1.Column = gc;
condition1.Appearance.ForeColor = color;
condition1.Appearance.Options.UseForeColor = true;
condition1.Appearance.Options.UseTextOptions = true;
condition1.Condition = FormatConditionEnum.Expression;
condition1.Expression = expression;
gridView.FormatConditions.Add(condition1);
}
/// <summary>
/// 设置单元格(字体颜色)
/// </summary>
/// <param name="gridView"></param>
/// <param name="fieldName">"States"；"OrderStatus"</param>
/// <param name="color">Color.Green；Color.FromArgb(30, 119, 194)</param>
/// <param name="condition">FormatConditionEnum.Equal;FormatConditionEnum.GreaterOrEqual</param>
/// <param name="conditionValue1">0；"已提交"</param>
/// <param name="conditionValue2">用于与conditionValue1求区间范围</param>
public static void SetStyleFormatFontCondition(this GridView gridView, string fieldName, Color color, FormatConditionEnum condition, object conditionValue1,object conditionValue2 = null)
{
GridColumn gc = gridView.Columns[fieldName];
StyleFormatCondition condition1;
if (conditionValue2 == null)
{
condition1 = new DevExpress.XtraGrid.StyleFormatCondition(condition, gc, null,
conditionValue1);
}
else
{
condition1 = new DevExpress.XtraGrid.StyleFormatCondition(condition, gc, null,
conditionValue1, conditionValue2);
}
condition1.Appearance.ForeColor = color;
condition1.Appearance.Options.UseForeColor = true;
condition1.Appearance.Options.UseTextOptions = true;
gridView.FormatConditions.Add(condition1);
}
#endregion

设置列背景色 https://www.cnblogs.com/MuNet/p/5736172.html Devexpress GridView 数据根据不同条件格式化显示色块和文字颜色 http://www.zhimengzhe.com/asp_netjiaocheng/161557.html Devexpress Winform Gridcontrol 中根据条件单元格的值改变单元格的颜色等属性。 http://www.lxway.com/668495256.htm
condition1.Expression = "[Name] != ?"; //Name字段不为空

cn.Appearance.BackColor = Color.Green;