[WPF]GridView或DataGrid中自定义样式:依据某一列设定其对应行的样式(背景色,字体等)

附效果照一张:

本方法使用StyleSelector来 获得依据自定义逻辑的style。

①

class ConditionalStyleSelector : StyleSelector
    {
        public override Style SelectStyle(object item,DependencyObject container)
        {
            object conditionValue = this.ConditionConverter.Convert(item, null, null, null);
            foreach (ConditionalStyleRule rule in this.Rules)
            {
                if (Equals(rule.Value, conditionValue))
                {
                    return rule.Style;
                }
            }

            return base.SelectStyle(item, container);
        }

        List<ConditionalStyleRule> _Rules;
        public List<ConditionalStyleRule> Rules
        {
            get
            {
                if (this._Rules == null)
                {
                    this._Rules = new List<ConditionalStyleRule>();
                }

                return this._Rules;
            }
        }

        IValueConverter _ConditionConverter;
        public IValueConverter ConditionConverter
        {
            get
            {
                return this._ConditionConverter;
            }
            set
            {
                this._ConditionConverter = value;
            }
        }
    }

    public class ConditionalStyleRule
    {
        object _Value;
        public object Value
        {
            get
            {
                return this._Value;
            }
            set
            {
                this._Value = value;
            }
        }

        Style _Style;
        public Style Style
        {
            get
            {
                return this._Style;
            }
            set
            {
                this._Style = value;
            }
        }
    }

其中，object conditionValue = this.ConditionConverter.Convert(item, null, null, null);这句话是俺用来进行条件转换的，将输入的条件转换成true或false。（可以转换成各种各样的东西，只要你能在后边拿他来与你定义的样式判断就好）

foreach是俺用来寻找转换后的结果有没有对应样式的

②上面就是主菜，下面说说配菜：

List<ConditionalStyleRule> _Rules;样式的键值对，这个我是在前台xaml里给他赋值的，后边再表。

IValueConverter _ConditionConverter;将输入条件经逻辑判断后返回一个东西来与键值对比较的东西（脱了裤子放屁的设计哈，屎量比较小不怕弄坏裤子的可以放弃他，不用这封装的东西直接与键值对比较）。

public class ConditionalStyleRule{...}这个不用说了吧，封装数据结构的。

③配菜也说完了，嗯，也没大说完，那个IValueConverter还没说：

 class COMStateConverter : IValueConverter
    {
#region IValueConverter Members
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            COM tempCOM = value as COM;

if (tempCOM != null)
            {
return tempCOM.StateCode == "0" ? true : false;
            }

return null;
        }
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
throw new NotImplementedException();
        }
#endregion

就是一IValueConverter接口，实现了源数据类型以及目标数据类型之间的转换。具体咋回事度娘去吧。

④最后说一下前台xaml的使用

    <UserControl.Resources>
<Style x:Key="HighUnitPriceStyle"
                   TargetType="GridViewRow">
<Setter Property="Background" Value="red" />
<Setter Property="Foreground" Value="blue" />
</Style>
<Style x:Key="LowUnitPriceStyle" TargetType="GridViewRow"/>
<cc:COMStateConverter x:Key="Convert" />
<cc:ConditionalStyleSelector x:Key="selector" ConditionConverter="{StaticResource Convert}">
<cc:ConditionalStyleSelector.Rules>
<cc:ConditionalStyleRule Style="{StaticResource HighUnitPriceStyle}">
<cc:ConditionalStyleRule.Value>
<sys:Boolean>True</sys:Boolean>
</cc:ConditionalStyleRule.Value>
</cc:ConditionalStyleRule>
<cc:ConditionalStyleRule Style="{StaticResource LowUnitPriceStyle}">
<cc:ConditionalStyleRule.Value>
<sys:Boolean>False</sys:Boolean>
</cc:ConditionalStyleRule.Value>
</cc:ConditionalStyleRule>
</cc:ConditionalStyleSelector.Rules>
</cc:ConditionalStyleSelector>
</UserControl.Resources>

然后在DataGrid或GridView中塞进RowStyleSelector="{StaticResource selector}"就好了。上面的代码样式我随便塞了个红蓝进去，具体样式自己整吧。哈