WPF Canvas ScrollViewer [英] WPF Canvas ScrollViewer

问题描述

我正在尝试将画布控件放入滚动查看器。 canvas控件是动态的，这意味着我在运行时使用c＃代码创建子代。

Hi,

I am trying to put a canvas control into a scrollviewer. The canvas control is dynamic, that means i am creating their children in c# code during runtime.

<ScrollViewer Grid.Row="1">
    <Canvas Name="cvHeats" VerticalAlignment="Stretch" HorizontalAlignment="Stretch"/>
</ScrollViewer>

我的问题是，滚动条显示，但它们被禁用。如何使用动态内容使得scrollviewer适用于具有动态内容的画布？



提前致谢，

Manu

My problem is, that the scrollbars are displayed, but they are disabled. How
can i make the scrollviewer work for a canvas with dynamic content?

Thanks in advance,
Manu

推荐答案

此链接可以帮助您：

stackoverflow.com/questions/3061400/scrollbars-are-not-visible-after-changing-positions-of-controls-inside-a- canvas

尝试给 Canvas 一个大小。类似于：

<ScrollViewer Grid.Row="1">
    <Canvas Name="cvHeats" VerticalAlignment="Stretch" HorizontalAlignment="Stretch"

            Width="1000" Height="1000" />
</ScrollViewer>

您可以按如下方式在xaml中设置控件：

You can set your controls up in xaml as follows:

<scrollviewer scrollviewer.horizontalscrollbarvisibility="Auto">
                 ScrollViewer.VerticalScrollBarVisibility="Auto">
                <canvas x:name="canMain" xmlns:x="#unknown">
                    <image x:name="imgMain" />
                </canvas>
            </scrollviewer>

然后订阅内部控件大小更改事件。在我的情况下，我正在使用图像，但您可以根据自己的需要更换它。

Then subscribe to the inner controls size changed event. In my case I'm using a image but you can replace it what ever suits your needs.

imgMain.SizeChanged += ImgMain_SizeChanged;

然后将画布的宽度和高度设置为图像的新尺寸。

Then in the set the width and height of your canvas to the new sizes of you image.

private void ImgMain_SizeChanged(object sender, SizeChangedEventArgs e)
        {
            canMain.Height = e.NewSize.Height;
            canMain.Width = e.NewSize.Width;
        }

这篇关于WPF Canvas ScrollViewer的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！