StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
text
Body
copied!<p>I figured I should post my current solution. It seems to work perfectly fine. Thank you Chris and Ants to the hints on how to go about doing this.</p> <pre><code>/// <summary> /// Reads a TextRange (DataFormats.Rtf) from the stream. /// </summary> /// <param name="stream">The stream to be read from.</param> /// <returns>The TextRange (DataFormats.Rtf) that was read from the stream.</returns> public static TextRange ReadTextRange(FileStream stream) { long startPos = stream.Position; int length = -1; int count = 0; int previousByte = 0; int currentByte = 0; //set previousByte to give the current one something to compare to previousByte = stream.ReadByte(); //parse the file counting the { and } to find the end of the rtf portion of the file. while (count > 0 || length < 1) { length++; stream.Position = startPos + length; currentByte = stream.ReadByte(); if (previousByte != 92) // not '\' so check to see if '{' or '}' is currentByte { if (currentByte == 123) // '{' increase count count++; else if (currentByte == 125) // '}' decrease count count--; } previousByte = currentByte; } //save finish position to move to later long finishPos = stream.Position; //reset stream position to start at beginning of rtf stream.Position = startPos; //read the rtf portion of the file into a byte[] byte[] content = new byte[length]; stream.Read(content, 0, length); //put the byte[] into a memory stream MemoryStream memStream = new MemoryStream(content); FlowDocument doc = new FlowDocument(); TextRange range = new TextRange(doc.ContentStart, doc.ContentEnd); //have the TextRange read from the memorystream range.Load(memStream, System.Windows.DataFormats.Rtf); memStream.Close(); //set the position to after the rtf portion of the file stream.Position = finishPos; return range; } </code></pre> <p>This ReadTextRange Method is in a StreamHelper class I defined for helping read from a FileStream. So all of this is to load a TextRange that is saved to the FileStream like this...</p> <pre><code>//save query (TextRange) Query.Save(stream, System.Windows.DataFormats.Rtf); </code></pre> <p>I hope that someone finds this useful if/when they come to a similar problem! :D</p> <p>EDIT:</p> <p>I used a profiler and found that this code was not very efficient so I have changed this code to be much more efficient in a few ways.</p> <ol> <li><p>Instead of using the TextRange and use a byte[] which holds the contents of MemoryStream memStream. This cuts out range.Load which consumes a lot of CPU.</p></li> <li><p>I took out the line stream.Position = startPos + length because I realized it was useless after the first run and also took up a decent amount of CPU. I placed stream.Position--; after the line previousByte = stream.ReadByte();</p></li> </ol> <p>Also I realized I was being a bad coder and wasn't following MVC by having TextRange, UI element, inside of my data class. Now it has a byte[], which is MUCH better.</p> <p>EDIT AGAIN:</p> <p>After a few minutes of having the byte[] instead of the TextRange I realized I had the size of the byte[] so I didn't need to parse it. So instead I save write the byte[] size and then the byte[]. This makes it extremely fast and can read a very large file nearly instantly.</p>

Querying!

Guidance

An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload