Silverlight 3 代码中的滚动文本块

发布于 2024-08-22 18:52:11 字数 712 浏览 7 评论 0原文

我需要滚动文本块文本。例如，文本块包含 700 个单词。这些单词从代码后面填充到文本块中，因为根据某些“内容”，它可能是不同的 700 个单词。此表单上也有一个文本框。用户将文本块中的单词键入到文本框中。当他们打字时，我会跟踪他们所在的文本块中的哪个单词。但是，并非文本块中的所有单词都适合文本块查看区域，因此我需要从代码后面滚动文本块。我该怎么做呢？

我正在使用 silverlight 3。

谢谢 shannon

将一些代码放入... 这是初学者的滚动查看器和文本块

            <ScrollViewer x:Name="svSourceText" Width="591" MaxHeight="202" VerticalScrollBarVisibility="Auto">

                <TextBlock Height="202" Width="591"  TextWrapping="Wrap" 
                x:Name="txtSource" FontSize="12" FontFamily="Fonts/Fonts.zip#Consolas" LineHeight="21.333"
                           />

        </ScrollViewer>

。当我将文本添加到 txtSource 中时，滚动查看器不会将其滚动条更改为所需的高度。

原文

i need to scroll the textblock text. For example, the textblock contains 700 words. These words are populated to the textblock from code behind as it could be a different 700 words depending on some "stuff". There is a textbox on this form as well. The user types the words in the textblock into the textbox. As they type i keep track of which word from the textblock they are on. However, not all the words in the textblock will fit in the textblock viewing area, so i need to scroll the textblock from code behind. How do i go about doing this.

I"m using silverlight 3.

Thanks shannon

might be useful to put some code in...
Here is the scrollviewer and text block

            <ScrollViewer x:Name="svSourceText" Width="591" MaxHeight="202" VerticalScrollBarVisibility="Auto">

                <TextBlock Height="202" Width="591"  TextWrapping="Wrap" 
                x:Name="txtSource" FontSize="12" FontFamily="Fonts/Fonts.zip#Consolas" LineHeight="21.333"
                           />

        </ScrollViewer>

for starters.. when i add text into the txtSource, the scroll viewer doesn't change it's scroll bar to be the height needed.

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下雨或天晴 2024-08-29 18:52:11

将 TextBlock 放入滚动查看器中。当用户在文本框中输入文本时捕获事件。检查它对于当前捕获的单词是否有效，然后滚动 TextBlock。

这是一个例子。我只是在每次用户按下空格键时滚动，您需要验证输入的单词的有效性。

XAML：

    <Grid x:Name="LayoutRoot">
    <Grid.RowDefinitions>
        <RowDefinition Height="25" />
        <RowDefinition Height="40" />
    </Grid.RowDefinitions>

    <TextBox Name="txtInput" KeyUp="TextBox_KeyUp" Width="200" Grid.Row="0" />

    <ScrollViewer Name="scrollViewer" Grid.Row="1" MaxHeight="25" MaxWidth="250" VerticalScrollBarVisibility="Visible" HorizontalScrollBarVisibility="Hidden">            
        <TextBlock>
            One
            <LineBreak />
            Two
            <LineBreak />
            Three
            <LineBreak />
            Four
            <LineBreak />
            Five
        </TextBlock>

    </ScrollViewer>


</Grid>

以及事件“KeyUp”的代码：

        private void TextBox_KeyUp(object sender, KeyEventArgs e)
    {
        if (e.Key.ToString().ToLower() == "space")
        {
            scrollViewer.ScrollToVerticalOffset(scrollViewer.VerticalOffset + 15);
        }
    }

Put the TextBlock in a scrollviewer. Capture the event when the user enters text into your TextBox. Check that it's valid for the word currently being captured and then scroll the TextBlock.

Here is an example. I'm just scrolling every time the user presses the space bar, you'd want to verify the validity of the word being entered.

XAML:

    <Grid x:Name="LayoutRoot">
    <Grid.RowDefinitions>
        <RowDefinition Height="25" />
        <RowDefinition Height="40" />
    </Grid.RowDefinitions>

    <TextBox Name="txtInput" KeyUp="TextBox_KeyUp" Width="200" Grid.Row="0" />

    <ScrollViewer Name="scrollViewer" Grid.Row="1" MaxHeight="25" MaxWidth="250" VerticalScrollBarVisibility="Visible" HorizontalScrollBarVisibility="Hidden">            
        <TextBlock>
            One
            <LineBreak />
            Two
            <LineBreak />
            Three
            <LineBreak />
            Four
            <LineBreak />
            Five
        </TextBlock>

    </ScrollViewer>


</Grid>

And the code for the event 'KeyUp':

        private void TextBox_KeyUp(object sender, KeyEventArgs e)
    {
        if (e.Key.ToString().ToLower() == "space")
        {
            scrollViewer.ScrollToVerticalOffset(scrollViewer.VerticalOffset + 15);
        }
    }

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