I have a function that has a bitmap instance in windows form application. I want this bitmap instance to be converted into png and save the png into given folder in server.
Following is my piece of code:
public void uploadLayerIcon()
{
Bitmap icon = new Bitmap("C:\\Users\\HP\\Desktop\\mun.jpg");
icon.Save("http://192.168.1.30/muneem/erp/u.png",System.Drawing.Imaging.ImageFormat.Png);
}
I am getting error invalid uri format.
How to upload this bitmap to server from windows form application?
I just made a TestApplication to check, and the only thing is not working is just the URI of the destination. If you use something like this it should work:
icon.Save(#"\\192.168.1.30\muneem\erp\u.png", System.Drawing.Imaging.ImageFormat.Png);
Issue resolved.
I convert bitmap image to base64encoded string and send that string to php script. Now php script decode that string and write content to file which is placed in the given location provided by user.
Related
I try to save my images on my server, but I can't let my server save file and virus because of that I want to get image content as pixels of rgb and after that I create image by myself.
I can't use bitmap (or other type in C# like bitmapImage, ... etc) and I don't know how I can do this with sixlabors.ImageSharp.
I have some code that I tried but I can't implement the exact logic that I want (code shown here):
[HttpPost("[action]")]
public async Task<IActionResult> Get([FromForm] ImageFormat file)
{
await using var memoryStream = new MemoryStream();
await file.File.CopyToAsync(memoryStream);
IImageFormat format;
using (var image = Image.Load(memoryStream.ToArray(), out format))
{
using (var output = new MemoryStream())
{
image.Save(output, format);
var responseType = format.Name.ToLower();
return File(output.ToArray(), "application/octet-stream", file.File.FileName);
}
}
return null;
}
Can anybody help me with this problem?
i don't see a reason to convert image into image: there are several format zip-algorythms etc.wich you have to support in that case. example jpg is not bitmap, there is convertion issue - quality of image becomes less each conversion time. Image itself is not executable - it can be used only as container for virus body, can't harm your OSystem itself, another executable part should works somewhere.
But even if you would like to store images on disk, in other format - you can convert image to base64 text (one line of code, like example) - it less harmful and well known way to work with any file type. you can zip image by cszip, you can change file name and extension to hide file type.
I don't see a reasson to convert one image to another for this scenario/task.
I have a large number of images on a Web server that need to be cropped. I would like to automate this process.
So my thought is to create a routine that, given the URL of the image, downloads the image, crops it, then uploads it back to the server (as a different file). I don't want to save the image locally, and I don't want to display the image to the screen.
I already have a project in C#.Net that I'd like to do this in, but I could do .Net Core if I have to.
I have looked around, but all the information I could find for downloading an image involves saving the file locally, and all the information I could find about cropping involves displaying the image to the screen.
Is there a way to do what I need?
It's perfectly possible to issue a GET request to a URL and have the response returned to you as a byte[] using HttpClient.GetByteArrayAsync. With that binary content, you can read it into an Image using Image.FromStream.
Once you have that Image object, you can use the answer from here to do your cropping.
//Note: You only want a single HttpClient in your application
//and re-use it where possible to avoid socket exhaustion issues
using (var httpClient = new HttpClient())
{
//Issue the GET request to a URL and read the response into a
//stream that can be used to load the image
var imageContent = await httpClient.GetByteArrayAsync("<your image url>");
using (var imageBuffer = new MemoryStream(imageContent))
{
var image = Image.FromStream(imageBuffer);
//Do something with image
}
}
I've written a program that can create digital art. Images like the Mandelbrot Set and the Julia Set. But I'm looking to save these images as PNGs. At present, in Java, I'm generating the images in an application window and then taking a screen shot of the display. However, I lose the finer detail of these images. Plus, this method also reduces the physical size of the images as well. I want to potentially be able to make a big poster out of these pictures.
In C#, I'm using the following:
Bitmap myimage = new Bitmap("image.png"); and: myimage.SetPixel(x,y, Color.FromArgb(255*colors[x,y], 255*colors[x,y], 255*colors[x,y]); where colors[,] is some value between 0 and 1.
The code runs fine, minus the Bitmap declaration. My understanding is that new Bitmap(filepath); allows you to edit and manipulate the PNG image. Am I right to think that? How do I create/edit a PNG file in C#?
(edit)PS: The PNG file, "image.png", does exist in the solution folder.
Firstly you have to know the step by step process in creating the PNG file.
Setup Aspose.Imaging for .NET package from Nuget.org.
Include reference to following two namespaces: Aspose.Imaging,
Aspose.Imaging.ImageOptions.
Specify license using SetLicense method before converting.
Read BMP file into an Image object.
Set attributes for output PNG image using PngOptions class.
Save the output PNG image with the specified PNG options.
Code to create PNG image from BMP
using System;
//Use following namespaces to create PNG image
using Aspose.Imaging;
using Aspose.Imaging.ImageOptions;
namespace CreatePNGImage
{
class Program
{
static void Main(string[] args)
{
//Set license before creating PNG image from BMP
Aspose.Imaging.License AsposeImagingLicense = new Aspose.Imaging.License();
AsposeImagingLicense.SetLicense(#"c:\asposelicense\license.lic");
//load input BMP image
Image BmpToPngImage = Image.Load("InputBMPImage.bmp");
//set attributes of the output PNG file
PngOptions PNGImageOptions = new PngOptions();
PNGImageOptions.ResolutionSettings = new ResolutionSetting(300, 300);
PNGImageOptions.CompressionLevel = 6;
//save converted output PNG image
BmpToPngImage.Save("OutputPNGImage.png", PNGImageOptions);
}
}
}
Try this to create the PNG file out of c#.
I am developing an Android App using Xamarin Studio in order to capture a picture and then send it to a web service.
The steps are:
Capture the picture and store it on the phone.
The web service receives an object as argument. This object contains the image in Base64. This is achieved in the following line:
oImagenFace.ImagenDocumento =(string)Base64ToBitmapDrawableConverter.ConvertBack(BitmapFactory.DecodeFile (imagepath));
At this point I am getting an Out of Memory Exception, but I can not resize the image (as explained here http://developer.android.com/training/displaying-bitmaps/load-bitmap.html) because I need it with the original size. The images are about 200Kb.
Did you tried to skip the BitmapFactory.DecodeFile, and convert the whole file into Base64?
Sg. like this:
oImagenFace.ImagenDocumento =(string)Base64ToBitmapDrawableConverter.ConvertBack(imagepath);
If that won't help, I would try to read the file by chunks and convert that parts to Base64.
Upload Image on Web Server using Android / C# {Xamarin}
This is Just Small Piece of Code. it can send any image from Android to your Web
Server.
System.Net.WebClient Client = new System.Net.WebClient();
Client.Headers.Add("Content-Type", "binary/octet-stream");
byte[] result = Client.UploadFile("localhost/FolderName/upload.php", "POST", path);
string s = System.Text.Encoding.UTF8.GetString(result, 0, result.Length);
Here is the PHP Code {upload.php}. Create a Folder name { Uploads } in
your Application.
<?php
$uploads_dir = 'uploads/'; //Directory to save the file that comes from client application.
if ($_FILES["file"]["error"] == UPLOAD_ERR_OK)
{
$tmp_name = $_FILES["file"]["tmp_name"];
$name = $_FILES["file"]["name"];
move_uploaded_file($tmp_name, "$uploads_dir/$name");
}
?>
In my project we need to save the image taken from webcam in a default path using flex 4.6 but giving a default path in flex(saving the image in a default path like C:\temp..) is not possible so we are passing the byte array of that captured image from flex to .ashx page in .net here,image is saving in a default path but imagebytes is not saving(showing that no data in image).If any body knows please let me know.
Finally i got the succeeded in passing the imagebytes from flex to ashx page like below
//Declare a string in script tag(Initialize a string before init() )
[Bindable]public var str64enc:String="";
//creating object for bytearray
[Bindable]public var imgbytes:ByteArray=new ByteArray();
//creating object for bitmapdata
[Bindable]public var picture1:BitmapData=new BitmapData(103,103,true);
**In your code**
var png:PNGEncoder=new PNGEncoder();
imgbytes=png.encode(picture1);
var base64enc:Base64Encoder=new Base64Encoder();
base64enc.encodeBytes(imgbytes);
str64enc=base64enc.toString();
STEP-BY-STEP PROCEDURE:-------
1-Take a base64encoder and encode the bytearray as below:
var base64enc:Base64Encoder=new Base64Encoder();
base64enc.encodeBytes(imgbytes);
2-then assign that base64 encoder object(In this case" base64enc") to string
3-In HTTPSERVICE u need to pass that string like:
<mx:HTTPService id="savepcktdata" method="POST"
url="ur's destination path like..(axis/security/security.aspx)"
result="savepcktdata_resultHandler(event)"
resultFormat="text">
<mx:request>
<Operation>savepcktdata</Operation>
<bytes>
{str64enc}
</bytes>
</mx:request>
</mx:HTTPService>
4- In .aspx page u need to retrieve like:
string str = Convert.ToString(Request.Form["bytes"]);
cocnclusion:In order to pass the image bytes from flex(flash builder 4.6) to dotnet
(visual studio) you need to pass through the base64 string like above code.
Below is the useful link related to this issue
How to pass image from a flex application to a asp net c# web service? asp-net-c-sharp-web-service