UWP RichEditBox 禁用图像大小调整 [英] UWP RichEditBox disable image resize
问题描述
我正在尝试构建一个本机编辑器,在其中我有一个丰富的编辑框,我可以在其中插入图像.我可以从编辑器调整图像大小,如何禁用调整大小.Al那么我怎样才能取回插入的图像.
我可以从编辑器调整图像大小,如何禁用调整大小
如果您想保持图像原始大小并插入到RichEditBox
,您可以使用 获取图像
如下所示.PixelWidth
和PixelHeight
值BitmapImage
Windows.Storage.Pickers.FileOpenPicker open = new Windows.Storage.Pickers.FileOpenPicker();open.SuggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.DocumentsLibrary;open.FileTypeFilter.Add(".png");Windows.Storage.StorageFile 文件 = await open.PickSingleFileAsync();如果(文件!= null){使用 (IRandomAccessStream fileStream = await file.OpenAsync(Windows.Storage.FileAccessMode.Read)){BitmapImage image = new BitmapImage();等待 image.SetSourceAsync(fileStream);Test.Document.Selection.InsertImage(image.PixelWidth, image.PixelHeight, 0, VerticalCharacterAlignment.Baseline, "img", fileStream);}}
<块引用>
还有我怎样才能得到插入的图像
从这个案例回复,您可以从您选择的 rtf 文本中解析图片数据.然后使用正则表达式过滤可用数据.下面是完整的代码,可以直接使用.
private async void GetImage(object sender, RoutedEventArgs e){字符串 rtf = "";Test.Document.Selection.GetText(TextGetOptions.FormatRtf, out rtf);字符串 imageDataHex = "";var r = new Regex(@"pict[\s\S]+?[\r\n](?[\s\S]+)[\r\n]\}\\par",RegexOptions.None);var m = r.Match(rtf);如果(m.成功){imageDataHex = m.Groups["imagedata"].Value;}byte[] imageBuffer = ToBinary(imageDataHex);StorageFile tempfile = await ApplicationData.Current.LocalFolder.CreateFileAsync("temppic.png", CreationCollisionOption.ReplaceExisting);等待 FileIO.WriteBufferAsync(tempfile, imageBuffer.AsBuffer());}public static byte[] ToBinary(string imageDataHex){//这个函数完全取自://http://www.codeproject.com/Articles/27431/Writing-Your-Own-RTF-Converterif (imageDataHex == null){throw new ArgumentNullException("imageDataHex");}int hexDigits = imageDataHex.Length;int dataSize = hexDigits/2;字节[] imageDataBinary = 新字节[数据大小];StringBuilder hex = new StringBuilder(2);int dataPos = 0;for (int i = 0; i
I'm trying to build a native editor in which i have a rich edit box in which i insert an image. I'm able to resize the image from the editor, how can I disable resizing. Also how can i get the inserted image back.
I'm able to resize the image from the editor, how can I disable resizing
If you want to keep image original size and insert to RichEditBox
, you could get the image PixelWidth
and PixelHeight
value with BitmapImage
like the follow.
Windows.Storage.Pickers.FileOpenPicker open = new Windows.Storage.Pickers.FileOpenPicker();
open.SuggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.DocumentsLibrary;
open.FileTypeFilter.Add(".png");
Windows.Storage.StorageFile file = await open.PickSingleFileAsync();
if (file != null)
{
using (IRandomAccessStream fileStream = await file.OpenAsync(Windows.Storage.FileAccessMode.Read))
{
BitmapImage image = new BitmapImage();
await image.SetSourceAsync(fileStream);
Test.Document.Selection.InsertImage(image.PixelWidth, image.PixelHeight, 0, VerticalCharacterAlignment.Baseline, "img", fileStream);
}
}
Also how can i get the inserted image
Derive from this case reply, you could parse picture data from your selected rtf text. Then use regular expression to filter available data. The follow is a complete code that you could use directly.
private async void GetImage(object sender, RoutedEventArgs e)
{
string rtf = "";
Test.Document.Selection.GetText(TextGetOptions.FormatRtf, out rtf);
string imageDataHex = "";
var r = new Regex(@"pict[\s\S]+?[\r\n](?<imagedata>[\s\S]+)[\r\n]\}\\par", RegexOptions.None);
var m = r.Match(rtf);
if (m.Success)
{
imageDataHex = m.Groups["imagedata"].Value;
}
byte[] imageBuffer = ToBinary(imageDataHex);
StorageFile tempfile = await ApplicationData.Current.LocalFolder.CreateFileAsync("temppic.png", CreationCollisionOption.ReplaceExisting);
await FileIO.WriteBufferAsync(tempfile, imageBuffer.AsBuffer());
}
public static byte[] ToBinary(string imageDataHex)
{
//this function taken entirely from:
// http://www.codeproject.com/Articles/27431/Writing-Your-Own-RTF-Converter
if (imageDataHex == null)
{
throw new ArgumentNullException("imageDataHex");
}
int hexDigits = imageDataHex.Length;
int dataSize = hexDigits / 2;
byte[] imageDataBinary = new byte[dataSize];
StringBuilder hex = new StringBuilder(2);
int dataPos = 0;
for (int i = 0; i < hexDigits; i++)
{
char c = imageDataHex[i];
if (char.IsWhiteSpace(c))
{
continue;
}
hex.Append(imageDataHex[i]);
if (hex.Length == 2)
{
imageDataBinary[dataPos] = byte.Parse(hex.ToString(), System.Globalization.NumberStyles.HexNumber);
dataPos++;
hex.Remove(0, 2);
}
}
return imageDataBinary;
}
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