从 UserControl 中的资源访问代码隐藏中的变量 [英] Access variable in code-behind from Resources in UserControl

问题描述

我有以下问题:我想访问 XAML 资源中定义的这三个变量之一

I have the following problem: I want to access one of these three vars, defined in XAML Resource

<UserControl.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary Source="../../Themes/MainStyle.xaml" />
        </ResourceDictionary.MergedDictionaries>
        <System:Int32 x:Key="maxVal">500</System:Int32>
        <System:Int32 x:Key="minVal">250</System:Int32>
        <System:Int32 x:Key="actualWidth">250</System:Int32>
    </ResourceDictionary>
</UserControl.Resources>

我想像这样从代码隐藏文件中访问actualWidth"的值:

I want to access the value of "actualWidth" from Codebehind file like this:

private void MinMaxGraphicsMessageSink(bool minmax)
{
   actualWidth = minmax ? 900 : 300;
}

但这行不通.有人可以帮忙吗?

But this doesn't work. Can someone help?

推荐答案

int maxVal = (Convert.ToInt32(FindResource("maxVal")));

同样是最小值

int minVal = (Convert.ToInt32(FindResource("minVal")));

设置资源的值，你可以这样做

to set value of a resource you can do like this

var resourceDictionary = this.Resources;
resourceDictionary["actualWidth"] = somevalue;

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