Re: Converting image to Base64? - C# Discussion Boards

Re: how can we bind datagrid with custom collection

20-Nov-06 22:58

By setting the data source of the data grid.

Christian Graus - C++ MVP

333soori20-Nov-06 23:34

333soori

20-Nov-06 23:34

sorry thats not my question

wht is custom collection?how can we do that.

soori

Re: how can we bind datagrid with custom collection

A T I F21-Nov-06 2:57

A T I F

21-Nov-06 2:57

Although the question is very vague on what you want to do let see if this helps.

You can create a custom collection by implementing IList, IEnumerable etc interfaces or extending a CollectionBase class to store whatever object you want to specialize to.

In order to sent a Custom Collection to a DataGrid it should be one of the following

A DataTable
A DataView
A DataSet
A DataViewManager
Any component that implements the IListSource interface
Any component that implements the IList interface

CustomCollection implements IList interface so it will work as a DataSource to DataGrid. Hope this helps.

Converting image to Base64?

Support12320-Nov-06 22:14

20-Nov-06 22:14

Hi All,

Please could someone give me a code snippet on how to convert an image into Base64. I think i could use it in this segment myXmlTextWriter.WriteElementString("ImagePath", Convert.ToString(ps.ImagePath)); , Convert the image into Base64 in C# before writing it into xml file. The reason why i need to do this is to embed an image into the xml so that it is embedded into my HTML after the xslDoc.Transform(xmlPath, ExamplePath+"\\Example.html",resolver); .

Actually you can display base-64 images inline, using the data url format -
see the spec. at http://www.ietf.org/rfc/rfc2397.txt[^] .

I read up on this topic and came across the following: <IMG SRC="data:image/gif,base64;[...]">where the [...] contains your base-64
string

"Many of life's failures are people who did not realize how close they were to success when they gave up." Thomas A. Edison

Guffa20-Nov-06 23:44

Guffa

20-Nov-06 23:44

If you have an Image object, save it to a MemoryStream to get a byte array.

If you have an image file, load it into a byte array.

Use the Convert.ToBase64String method to make the conversion.

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b { font-weight: normal; }

Support12321-Nov-06 0:02

21-Nov-06 0:02

Hi,

I came across this example...

//Serialization: image to XML (base64)<br />
	Image srcImage = new Bitmap(txtGIFImageFile.Text);<br />
	MemoryStream memStream = new MemoryStream();<br />
	srcImage.Save(memStream, System.Drawing.Imaging.ImageFormat.Gif);<br />
<br />
	StringBuilder strBuilder = new StringBuilder();<br />
	StringWriter writerSerialized = new StringWriter(strBuilder);<br />
	XmlTextWriter writerXMLText = new XmlTextWriter(writerSerialized);<br />
<br />
	XmlSerializer serializerXML = new XmlSerializer(memStream.GetBuffer().GetType());<br />
	serializerXML.Serialize(writerXMLText, memStream.GetBuffer());<br />
	<br />
	writerXMLText.Close();<br />
	txtSerializedText.Text = strBuilder.ToString();

would it be possible to insert a path with the file name (like for example: "C:\img\img123.jpg" ) in the Image srcImage = new Bitmap(txtGIFImageFile.Text); part?

Thank you in advance.
Nico

"Many of life's failures are people who did not realize how close they were to success when they gave up." Thomas A. Edison

Guffa21-Nov-06 0:31

Guffa

21-Nov-06 0:31

NarutoFan#1 wrote:
would it be possible to insert a path with the file name (like for example: "C:\img\img123.jpg" ) in the Image srcImage = new Bitmap(txtGIFImageFile.Text); part?

I take it that you have no clue how the code really works?

The new Bitmap() part is loading the image from the file specified in the text box. Of course you can use any string you like instead of reading a string from a text box.

Are you going to convert the image from one format to anohter? Otherwise there is no reason to load the image and then save it again.

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b { font-weight: normal; }

Support12323-Nov-06 3:48

23-Nov-06 3:48

Yes, i need to convert the image to Base64, this is the format i operantly need to be able to embed an image into the xml to be able to embed it in the html.

"Many of life's failures are people who did not realize how close they were to success when they gave up." Thomas A. Edison

Guffa23-Nov-06 7:59

Guffa

23-Nov-06 7:59

You can't convert an image into base 64 format, as base 64 is not an image format. Converting from one image format to another is for example converting a GIF image into a JPEG image. What you convert into base 64 is the image file data, not the image itself.

If you want to send the image data in the current format, there is no need to unpack it into an Image object only to re-pack it back to the same format. All you do is use a lot of processing time for nothing, and possibly cause degradation of the image quality.

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b { font-weight: normal; }

Support12323-Nov-06 20:23

23-Nov-06 20:23

Okay thank you for your time. But would it be a good idea to convert the image file data to base64 or would it be a better idea to just redo the xml and xsl and just use FOP to create a pdf file with the image embedded onto that?

"Many of life's failures are people who did not realize how close they were to success when they gave up." Thomas A. Edison

Support12324-Nov-06 0:42

24-Nov-06 0:42

okay, i just redid the whole report. Thank you for your time. Smile | :)

Enjoy your day.

Thank goodness it's Friday. Big Grin | :-D

"Many of life's failures are people who did not realize how close they were to success when they gave up." Thomas A. Edison

daniel9920-Nov-06 21:51

daniel99

20-Nov-06 21:51

How can I send a email with the standard email-program in windows. Who can help me with an example

Re: Email

Christian Graus20-Nov-06 21:54

20-Nov-06 21:54

You need a MAPI wrapper to do this, there are several on the web, type 'C# MAPI' in to google.

Christian Graus - C++ MVP

Re: Email

~~_{lost in transition}~~ 21-Nov-06 4:42

~~_{lost in transition}~~

21-Nov-06 4:42

Send an email with two lines of code:
Using System.Net.Mail;

namespace Email
{
class EmailMe
{
void SendEmail()
{
string SmtpSrv = "mail.Hotmail.com";
SmtpClient _SC = new SmtpClient(SmtpSrv);
_SC.Send(string "From", string "To", string "Subject", string "Body")
}
}
}

3D in c#

amin saffari20-Nov-06 21:16

amin saffari

20-Nov-06 21:16

hi how can i use 3d in c# (.net3) (i wana a object that can rotate , view and etc of common 3d action )

########################

Christian Graus20-Nov-06 21:55

20-Nov-06 21:55

Easiest way, download DirectX SDK and look at the C# samples.

Christian Graus - C++ MVP

lmoelleb20-Nov-06 22:38

lmoelleb

20-Nov-06 22:38

Using DirectX would be a rather painful way to do something extremely simple - and in return it would not be as easy to use as part of other controls as the simple solution. Smile | :)

I have previously posted an example on another forum[^] - notice this is just an evenings hack, so consider it a starting point, not "best practices". Obviosly you would need your own domain specific way to load the 3D model to display (I think WPF might be able to load some formats, I didn't investigate it as I did not need it).

I won't promise the downloadable will execute (they where build for the beta) but I do beleive the source code posted 07-10-2006, 09:54 will still work, or at least get you started Smile | :)

amin saffari20-Nov-06 23:38

amin saffari

20-Nov-06 23:38

heeh and more

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How can we disable individual nodes in a treeview in .Net?

klanglieferant20-Nov-06 23:54

klanglieferant

20-Nov-06 23:54

I think its quite easy to use the TAO OpenGL framework.
The installation provides libaries enabling c# for OpenGL. The installation comes with the NeHe examples.
Just don't know where it works for .net3

TinyTin20-Nov-06 21:01

TinyTin

20-Nov-06 21:01

Hi,
How can we disable individual nodes in a treeview in .Net?

Tin

Re: How can we disable individual nodes in a treeview in .Net?

Christian Graus20-Nov-06 21:55