WPF saves canvas

Since the UI of WPF is expressed in XAML, we can use this advantage to save the XAML element in WPF as a variety of files. In many cases, this operation is not required. Save the XAML as an image, string, and XPS. Here I have written some methods for your reference.

Note: Before saving the following, make sure that the canvas in the parameter is high and wide.

1. Save canvas as a text file

 
1: using system. Windows. markup;
 

 
2: using system. IO;
 

 
1: Public void Export (URI path, canvas surface)
 

 
2 :{
 

 
3: If (Path = NULL) return;
 

 
4: If (surface = NULL) return;
 

 
5:
 

 
6: String XAML = xamlwriter. Save (surface );
 

 
7: file. writealltext (path. localpath, XAML );
 

 
8 :}
 

2. Save the canvas as An XPS file. The XPs namespace is in reachframework. dll.

 
1: using system. Io. packaging;
 

 
2: using system. Windows. XPS;
 

 
3: using system. Windows. XPS. packaging;
 

4: using system. IO;
 

 
1: Public void Export (URI path, canvas surface)
 

 
2 :{
 

 
3: If (Path = NULL) return;
 

 
4:
 

 
5: Transform transform = surface. layouttransform;
 

 
6: surface. layouttransform = NULL;
 

 
7:
 

 
8: size = new size (surface. Width, surface. Height );
 

 
9: surface. Measure (size );
 

 
10: surface. Arrange (New rect (size ));
 

 
11:
 

 
12: Package package = package. Open (path. localpath, filemode. Create );
 

 
13: xpsdocument Doc = new xpsdocument (Package );
 

 
14: xpsdocumentwriter writer = xpsdocument. createxpsdocumentwriter (DOC );
 

15: writer. Write (surface );
 

 
16: Doc. Close ();
 

 
17: package. Close ();
 

 
18:
 

 
19: surface. layouttransform = transform;
 

 
20 :}
 

3. Save the canvas as an image

 
1: Public void exporttopng (URI path, canvas surface)
 

 
2 :{
 

 
3: If (Path = NULL) return;
 

 
4:
 

 
5: Transform transform = surface. layouttransform;
 

 
6: surface. layouttransform = NULL;
 

 
7:
 

 
8: size = new size (surface. Width, surface. Height );
 

 
9: surface. Measure (size );
 

 
10: surface. Arrange (New rect (size ));
 

 
11:
 

12: rendertargetbitmap renderbitmap =
 

 
13: New rendertargetbitmap (
 

 
14: (INT) size. Width,
 

 
15: (INT) size. height,
 

 
16: 96d,
 

 
17: 96d,
 

 
18: pixelformats. pbgra32 );
 

 
19: renderbitmap. Render (surface );
 

 
20:
 

 
21: Using (filestream outstream = new filestream (path. localpath, filemode. Create ))
 

 
22 :{
 

 
23: pngbitmapencoder encoder = new pngbitmapencoder ();
 

 
24: encoder. frames. Add (bitmapframe. Create (renderbitmap ));
 

 
25: encoder. Save (outstream );
 

 
26 :}
 

 
27: surface. layouttransform = transform;
 

28 :}
 

Conclusion:

These are all used in WPF for win, hoping to help you.