Question

我想弄清楚如何制作一个长文本框。我知道一旦文本框大于2048就会出现问题。但是如果你撰写的电子邮件大于那个没有问题的电子邮件。电子邮件使用什么类型的控件？

<ScrollViewer>
    <TextBox />
</ScrollViewer>

Answer 1

此blog post涵盖了此问题的解决方案。基本上你必须在多个TextBlocks之间拆分文本，然后将它们添加到StackPanel。

private void ParseText(string value)
{
     if (this.stackPanel == null)
     {
         return;
     }
     // Clear previous TextBlocks
     this.stackPanel.Children.Clear();
     // Calculate max char count
     int maxTexCount = this.GetMaxTextSize();

     if (value.Length < maxTexCount)
     {
         TextBlock textBlock = this.GetTextBlock();
         textBlock.Text = value;
         this.stackPanel.Children.Add(textBlock);
     }
     else
     {
         int n = value.Length / maxTexCount;
         int start = 0;
         // Add textblocks
         for (int i = 0; i < n; i++)
         {                    
             TextBlock textBlock = this.GetTextBlock();
             textBlock.Text = value.Substring(start, maxTexCount);
             this.stackPanel.Children.Add(textBlock);
             start = maxTexCount;
         }

         // Pickup the leftover text
         if (value.Length % maxTexCount > 0)
         {
             TextBlock textBlock = this.GetTextBlock();
             textBlock.Text = value.Substring(maxTexCount * n, value.Length - maxTexCount * n);
             this.stackPanel.Children.Add(textBlock);                   
         }
     }
 }

windows phone 8长文本框控件

1 个答案: