Most of the examples I see say to put it on the clipboard and use paste, but that doesn't seem to be very good because it overwrites the clipboard.
I did see one method that manually put the image into the RTF using a pinvoke to convert the image to a wmf. Is this the best way? Is there any more straightforward thing I can do?
The most straightforward way would be to modify the RTF code to insert the picture yourself.
In RTF, a picture is defined like this:
'{' \pict (brdr? & shading? & picttype & pictsize & metafileinfo?) data '}'
A question mark indicates the control word is optional.
"data" is simply the content of the file in hex format. If you want to use binary, use the \bin control word.
For instance:
{\pict\pngblip\picw10449\pich3280\picwgoal5924\pichgoal1860 hex data}
{\pict\pngblip\picw10449\pich3280\picwgoal5924\pichgoal1860\bin binary data}
\pict = starts a picture group,
\pngblip = png picture
\picwX = width of the picture (X is the pixel value)
\pichX = height of the picture
\picwgoalX = desired width of the picture in twips
So, to insert a picture, you just need to open your picture, convert the data to hex, load these data into a string and add the RTF codes around it to define a RTF picture. Now, you have a self contained string with picture data which you can insert in the RTF code of a document. Don't forget the closing "}"
Next, you get the RTF code from your RichTextBox (rtbBox.Rtf), insert the picture at the proper location, and set the code of rtbBox.Rtf
One issue you may run into is that .NET RTB does not have a very good support of the RTF standard.
I have just made a small application* which allows you to quickly test some RTF code inside a RTB and see how it handles it. You can download it here:
RTB tester (http://your-translations.com/toys).
You can paste some RTF content (from Word, for instance) into the left RTF box and click on the "Show RTF codes" to display the RTF codes in the right RTF box, or you can paste RTF code in the right RTB and click on "Apply RTF codes" to see the results on the left hand side.
You can of course edit the codes as you like, which makes it quite convenient for testing whether or not the RichTextBox supports the commands you need, or learn how to use the RTF control words.
You can download a full specification for RTF online.
NB It's just a little thing I slapped together in 5 minutes, so I didn't implement file open or save, drag and drop, or other civilized stuff.
I use the following code to first get the data from clipboard, save it in memory, set the image in clipboard, paste it in Rich Text Box and finally restore the data in Clipboard.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
OpenFileDialog1.Filter = "All files |*.*"
OpenFileDialog1.Multiselect = True
Dim orgdata = Clipboard.GetDataObject
If OpenFileDialog1.ShowDialog = Windows.Forms.DialogResult.OK Then
For Each fname As String In OpenFileDialog1.FileNames
Dim img As Image = Image.FromFile(fname)
Clipboard.SetImage(img)
RichTextBox1.Paste()
Next
End If
Clipboard.SetDataObject(orgdata)
End Sub
The OpenFileDailog1, RichTextBox1 and Button1 are Open File Dialog, Rich Text Box and button controls respectively.
private void toolStripButton1_Click(object sender, EventArgs e)
{
FileDialog fDialog = new OpenFileDialog();
fDialog.CheckFileExists = true;
fDialog.CheckPathExists = true;
fDialog.RestoreDirectory = true;
fDialog.Title = "Choose file to import";
if (fDialog.ShowDialog() == DialogResult.OK)
{
string lstrFile = fDialog.FileName;
Bitmap myBitmap = new Bitmap(lstrFile);
// Copy the bitmap to the clipboard.
Clipboard.SetDataObject(myBitmap);
DataFormats.Format format = DataFormats.GetFormat(DataFormats.Bitmap);
// After verifying that the data can be pasted, paste
if(top==true && this.rtTop.CanPaste(format))
{
rtTop.Paste(format);
}
if (btmLeft == true && this.rtBottomLeft.CanPaste(format))
{
rtBottomLeft.Paste(format);
}
if (btmCenter == true && this.rtBottomCenter.CanPaste(format))
{
rtBottomCenter.Paste(format);
}
if (btmRight == true && this.rtBottomRight.CanPaste(format))
{
rtBottomRight.Paste(format);
}
}
}
Here is what I do to hack the rich text control:
Insert the required image in wordpad or MS-WORD. Save the file as 'rtf'. Open the rtf file in notepad to see the raw rtf code. Copy the required tags & stuff to the 'rtf' property of your Rich Text Box (append to existing text).
There is some trial and error involved but works.
With C#, I use place holder StringBuilder objects with the necessary rtf code. Then I just append the image path.
This is a workaround for not having to learn the RTF syntax.
My own version that I posted in a new thread, apparently I should have searched and posted it here. Anyway, using the clipboard again, very easy.
private void button1_Click(object sender, EventArgs e)
{
openFileDialog1.Filter = "Images |*.bmp;*.jpg;*.png;*.gif;*.ico";
openFileDialog1.Multiselect = false;
openFileDialog1.FileName = "";
DialogResult result = openFileDialog1.ShowDialog();
if (result == DialogResult.OK)
{
Image img = Image.FromFile(openFileDialog1.FileName);
Clipboard.SetImage(img);
richTextBox1.Paste();
richTextBox1.Focus();
}
else
{
richTextBox1.Focus();
}
}
}
If you were in C++, the way to do it is thru OLE. More specifically, if you search Google for ImageDataObject it will show C++ code how to insert a HBITMAP into the RTF Control. One link is here.
Now, how this translates into .Net code, I don't know. I currently don't have the time to work thru the details.
I was also looking for something for this same task and found this ->
http://sourceforge.net/projects/netrtfwriter/
You can generate any type of RTF text that you would want and then use it however you wish. Very well structured example which will auto sense the image type being used (jpg/jpeg/png etc) and worked for the image files I have been using. If you are in a hurry then this is a great RTF generator!
All I did was make a small pictureBox control in c# and made sure it was hidden behind another object big enough to hide it. Then I made a button to insert a picture, and it loaded the pictureBox with the image then it puts it in the richTextBox then it clears the pictureBox control.
Here is the code.
private void InsertPicture_Click(object sender, EventArgs e)
{
{
if (openFileDialog4.ShowDialog() == DialogResult.OK)
{
// Show the Open File dialog. If the user clicks OK, load the
// picture that the user chose.
pictureBox2.Load(openFileDialog4.FileName);
Clipboard.SetImage(pictureBox2.Image);
pictureBox2.Image = null;
this.richTextBox1.Paste();
}
}
}
After inserting the code to do it with the clipboard, type in Clipboard.Clear();. It works well and it doesn't clear everything, only the item last added to the clipboard.
Full Code:
private void addPictureToRTB()
{
using (OpenFileDialog ofd = new OpenFileDialog() { Filter = "Pictures|*.png" })
{
if (ofd.ShowDialog() == DialogResult.OK)
{
ClipBoard.SetImage(Image.FromFile(ofd.FileName));
richTextBox.Paste();
Clipboard.Clear();
}
}
}
Then reference this function where you need to.
Several hours surfing for solution to insert image without loosing quality and fixed the gray background with transparent image/png
// assuming the image is in your Resources
var img = Resources.ImageWithTransparentBckgrnd;
var g = Graphics.FromImage(img);
using (var ms = new MemoryStream())
{
img.Save(ms, ImageFormat.Png);
IntPtr ipHdc = g.GetHdc();
Metafile mf = new Metafile(ms, ipHdc);
g = Graphics.FromImage(mf);
g.FillEllipse(Brushes.White, 0, 0, 16, 16); // size you want to fill in
g.Dispose();
mf.Save(ms, ImageFormat.Png);
IDataObject dataObject = new DataObject();
dataObject.SetData("PNG", false, ms);
Clipboard.SetDataObject(dataObject, false);
richTextBox1.Paste();
SendKeys.Send("{RIGHT}");
richTextBox1.Focus();
}
Related
I am writing the code editor in C# and i want to make the saving with keyboard shorcut CTRL + S this is my saving file code
private void saveToolStripMenuItem1_Click(object sender, EventArgs e)
{
var di = new SaveFileDialog();
di.Filter = "Text Files|*.txt";
di.FileName = "Txt" + ".txt";
var result = di.ShowDialog();
if (result == DialogResult.OK)
{
File.WriteAllText(di.FileName, textBox1.Text);
}
}
I want the tip how to solve it or piece of code that will work.
Select the Save menu strip item:
Open the properties window and set the keyboard shortcut:
Note that your code is only saving the rich text (rich = formatted) as plain text, so your file will not have that formatting. If you want to save as rich text, use
richTextBox1.SaveFile("whatever.rtf");
So I made code again about saving files (you can select file name)
here:
private void button3_Click(object sender, EventArgs e)
{
SaveFileDialog saveFileDialog1 = new SaveFileDialog();
if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
using (Stream s = File.Open(saveFileDialog1.FileName, FileMode.CreateNew))
using (StreamWriter sw = new StreamWriter(s))
{
sw.Write(fastColoredTextBox1.Text);
}
}
}
the problem is I want to have 2 selectable extensions:
-.txt
-.md
because the code I wrote can save to any type of file(and if you didn't put anything I will save as . FILE) and I just want only 1 save file type.
Save dialog
You need to set the dialog's Filter property according to the pattern:
Text to show|Filter to apply|Text to show 2|Filter to apply 2|...
For example in your case, where you seem to be saying you want the save dialog to have a combo dropdown containing two things, one being Text and the other being Markdown, your Filter has 4 things:
.Filter = "Text files|*.txt|Markdown files|*.md";
It is typical to put the filter you will apply into the text you will show too, so the user can see what you mean by e.g. "Text files" but I've left that out for clarity.
For example you might choose to make it say Text files(*.txt)|*.txt - the text in the parentheses has no bearing on the way the filter works, it's literally just shown to the user, but it tells them "files with a .txt extension"
Footnote, you may have to add some code that detects the extension from the FileName if you're saving different content per what the user chose e.g.:
var t = Path.GetExtension(saveFileDialog.FileName);
if(t.Equals(".md", StringComparison.OrdinalIgnoreCase))
//save markdown
else
//save txt
You can just use the filter of your dialog to set the allowed extensions:
// Filter by allowed extensions
saveFileDialog1.Filter = "Allowed extensions|*.txt;*.md";
I am using a MessageBox to output a string that I want to be able to copy the text from and paste elsewhere.
A MessageBox does not allow you to copy the text that it displays, so I need another option that would work.
I'm using:
MessageBox.Show("Test!");
If you just want to let a User select and copy the Text from a TextBox, you could create your own Form with a TextBox inside and then show it, with .Show() or .ShowDialog().
The latter will present a Modal Form, as the Dialog created by MessageBox.Show().
You can also create it on the fly; clicking on a Button, for example:
private void button1_Click(object sender, EventArgs e)
{
ShowMyDialog("Dialog Title", "Test!");
}
private void ShowMyDialog(string title, string text)
{
var form = new Form() {
Text = title,
Size = new Size(250, 80)
};
form.Controls.Add(new TextBox() {
Font = this.Font,
Text = text,
Size = new Size(150, this.Font.Height),
Location = new Point(50, 10)
});
form.ShowDialog();
form.Controls.OfType<TextBox>().First().Dispose();
form.Dispose();
}
If you instead want to put some text in the ClipBoard, you could use ClipBoard.SetText:
Clears the Clipboard and then adds text data in the Text or
UnicodeText format, depending on the operating system.
Clipboard.SetText("My String");
Then you can paste the string (where possible) with Ctrl+V or Shift+Insert or get it back in code with Clipboard.GetText;
string fromClipBoard = Clipboard.GetText();
You can also specify a Text Format using the TextDataFormat enumerator:
Clipboard.SetText([HtmlContent], TextDataFormat.Html);
I have a WinForms application with a richTextBox. I would like to be able to cut, copy and paste formatted text in my application. Currently, my code consists of:
Cut all:
richTextBoxPrintCtrl1.Cut();
Cut Selected:
Clipboard.SetText(richTextBoxPrintCtrl1.Text);
richTextBoxPrintCtrl1.Text = "";
Copy all:
richTextBoxPrintCtrl1.Copy();
Copy Selected:
Clipboard.SetDataObject(richTextBoxPrintCtrl1.SelectedText);
Paste:
DataFormats.Format myFormat = DataFormats.GetFormat(DataFormats.Text);
richTextBoxPrintCtrl1.Paste(myFormat);
I would like it so that if I cut/copy text from the richTextBox, it keeps ALL formatting (size, font, colour etc.), and if I paste text to the richTextBox, it also keeps all formatting.
How would this be achieved?
Thanks.
Try this two function:
COPY
private void Copy()
{
Clipboard.SetText(richTextBox1.Rtf, TextDataFormat.Rtf);
}
PASTE
private void Paste()
{
if (Clipboard.ContainsText(TextDataFormat.Rtf))
{
richTextBox1.Rtf = Clipboard.GetText(TextDataFormat.Rtf);
}
}
I want to insert a picture into a RichTextBox. I add the picture in coding.
This is the major code, adding a jpg image:
MemoryStream memoryStream = new MemoryStream();
img.Save(memoryStream,System.Drawing.Imaging.ImageFormat.Jpeg);
byte[] bytes = memoryStream.ToArray();
String width = img.Width.ToString();
String height = img.Height.ToString();
String hexImgStr=BitConverter.ToString(bytes, 0).Replace("-","");
String picStr=#"{\pict\jpegblip\picw"+width+#"\pich"+height+
#"\picwgoal"+width+#"\pichgoal"+height+" "+hexImgStr+"}";
Then I insert the "picStr" to the rtf document. But the image can't be seen. I thought "hexImgStr" maybe wrong. I also generate the "hexImgStr" in another way:
FileStream fs = new FileStream(imgPath,FileMode.Open);
BinaryReader br=new BinaryReader(fs);
//byte[] bytes=new byte[fs.Length];
String hexImgStr="";
for (long i = 0; i < fs.Length; i++)
{
//bytes[i] = br.ReadByte();
hexImgStr +=Convert.ToString(br.ReadByte(),16);
}
The image can't be seen either. What's wrong with it.
Thanks a lot.
There's a high probability of failure here. It starts with inserting the RTF in the right place. The true problem is likely to be the exact format you generate. Images are embedded OLE objects for RTB, they need a metadata header that describes the object. There is no support whatsoever for this in .NET, OLE embedding went the way of the dodo a long time ago.
One thing I know that works is to get an image into an RTB through the clipboard. Like this:
private void button1_Click(object sender, EventArgs e) {
using (var img = Image.FromFile("c:\\screenshot.png")) {
Clipboard.SetImage(img);
richTextBox1.Paste();
}
}
Adjust the SelectionStart property as necessary to determine where the image gets inserted.
First add a picture to picturebox, then add below code inside the button click event
Or add picture manually.....
image.FromFile("Source");
Clipboard.SetImage(PictureBox1.Image);
this.RichTextBox1.Paste();