Is it possible to use System.Drawing.Image in an RDLC Image Control?
All I have been reading were 3 methods:
database
embeded resource
external file
Thank you thank you.
EDIT:
Following up from this .NET or C# library for CGM (Computer Graphics Metafile) format? I now got the image in System.Drawing.Image format and want to display it as part of the report (as an image) --- that's what I want to do.
Not sure if this is what you are looking for, but if you have an image in code and you want to show it in the report, create a wrapper object that has a property that returns the image as a byte array and give then an instance of this wrapper-class with the valid image to the report as a ReportDataSource.
Something like:
ReportDataSource logoDataSource = new ReportDataSource();
logoDataSource.Name = "LogoDS";
logoDataSource.Value = new List<LogoWrapper>() { yourLogoWrapper };
localReport.DataSources.Add(logoDS);
In the report you then you can the image as it were from the database
=First(Fields!LogoByteArrayProperty.Value, "LogoDS")
The wrapper looks something like:
class LogoWrapper{
...
public byte[] LogoByteArrayProperty{
get{
// Return here the image data
}
}
}
I use this quite often. It has the advantage that I don't have to add the image to the db or add it as a resource of every report. And furthermore, the app can say which image should be used.
Please note, the given image format must be known from the rdlc-engine.
The last question would be, how to convert a system.drawing.image to a byte array. I work with WPF and therefore, I dont known. But I'm sure google will respond to this question very reliable.
You Can use the 'Database' Source Option along with Parameters to Dynamically set Image Source from Byte Arrays.
Code Behind:
var param2 = new ReportParameter()
{
Name = "CompanyLogo",
Values = { Convert.ToBase64String(*ByteArrayImageObject*) }
};
ReportViewer1.LocalReport.SetParameters(param2);
rdlc File:
1- Add Text Parameters 'CompanyLogo' and 'MIMEType'
2- Set the Value Property of the Image to =System.Convert.FromBase64String(Parameters!CompanyLogo.Value)
3- Set MIME Type Property to
=Parameters!MIMEType.Value
4- Use 'Database' As Source
How can I render a PNG image (as a memory stream) onto a .NET ReportViewer report surface
i am not quite sure what do you want to do with this but in general it is not possible.Image Control is just a image holder in the RDLC files.These 3 options specify the location from where the image control takes the image which to display from- database, embeded resource or external file. If you give me more info on what do you want to achieve i can give you some kind of solution.
Best Regards,
Iordan
Related
How I can get the image that the user just uploaded to display in another element on the same page? I'm using the storeAsFile property within the filePond options.
As note, I'm currently displaying the image with ImagePreview plugin within the filepond input instance, but i want to show this image on another part of the page. Hope i'm being clear enough.
Found the solution,
pondPhoto.on('addfile', (error, file) => {
// this object contains the file info
console.log(file.file)
// you can construct a blob object
const imageSrc = URL.createObjectURL(file.file)
// then you may attach it to any image in your DOM
document.querySelector('img').setAttribute('src', imageSrc)
})
Currently, I am Working on image editor that allows me to crop an image and apply a filter.
I am using fabric js version 1.7.22.
I want to implement crop functionality.
so my cropping flow is like Below :
crop image using a plugin and ger base64 of the cropped image.
generate blobUrl from base64 which help to display image in fabric js canvas.
After Cropping the image, I Just replace old image src with new One.
It works fine when an image has no filter.
but when I try to set a filter in the image first then try to replace src using setSrc() function.
It throws an error like Below
filter.applyTo is not a function
I have created one fiddle for demonstrating to replace src after the apply filter.
https://jsfiddle.net/Mark_1998/98gLhcb4/1/
And I Can't upgrade my fabric js version. If any patch Available then
Please Help Me.
The problem lies in this piece of code:
canvas.getActiveObject().setSrc('http://fabricjs.com/assets/pug_small.jpg', function(){
canvas.renderAll();
}, canvas.getActiveObject().toObject());
You're passing canvas.getActiveObject().toObject() as an options object, which is assigned to your image in setSrc() -> setElement() -> _initConfig().
toObject() serializes your fabric.Image, and filters array no longer contains the actual fabric.Filter, but rather a serialized version of it. So, it does not have a prototype with applyTo() method on it, hence the error filter.applyTo is not a function when fabric tries to reapply filters to your image after setSrc().
Instead of passing the whole serialized object as options, you'll need to pick the properties you actually want to be passed. As I'm not sure about what your requirements are, I tried replacing the above code with the following and it worked for me:
var options = canvas.getActiveObject().toObject();
delete options.filters;
options.crossOrigin = true;
canvas.getActiveObject().setSrc('http://fabricjs.com/assets/pug_small.jpg', function(){
canvas.renderAll();
}, options);
Note the options.crossOrigin = true - you won't be able to apply filters without it.
Here is my scenario: On my main view I am loading a list of items. Each item has an imageURL property. I am binding an Image component to the ImageURL property. Everything works well, but the image takes an extra second or two to load during which time the Image component is collapsed. Once the image is loaded, the Image component is displayed properly. This creates an undesirable shift on the page as the image is rendered.
The same images are going to be rendered on 2 other views.
What is the best practice to handle this scenario? I tried loading the base 64 string instead of the image url, which worked, but it slowed down the loading of the initial view significantly.
How can I pre-fetch the images and reuse them as I navigate between the views? I was looking at the image-cache module which seems to be addressing the exact scenario, but the documentation is very vague and the only example I found (https://github.com/telerik/nativescript-sample-cuteness/blob/master/nativescript-sample-cuteness/app/reddit-app-view-model.js) did not really address the same scenario. If I understood the code correctly, this is more about the virtual scrolling. In my case, I will have only 2-3 items, so the scrolling is not really a concern.
I would appreciate any advise.
Thank you.
Have you tried this?
https://github.com/VideoSpike/nativescript-web-image-cache
You will likely want to use a community plugin for this. You can also take a look at this:
https://docs.nativescript.org/cookbook/ui/image-cache
So after some research I came up with a solution that works for me. Here is what I did:
When the app start I created a global variable that contained a list of observable objects
then I made the http call to get all the objects and load them into the global variable
In the view I displayed the image as (the image is part of a Repeater item template):
<Image loaded="imageLoaded" />
in the js file I handled the imageLoaded events as:
var imageSource = require("image-source");
function imageLoaded(args) {
var img = args.object;
var bc = img.bindingContext;
if (bc.Loaded) {
img.imageSource = bc.ImageSource;
} else {
imageSource.fromUrl(bc.ImageURL).then(function (iSource) {
img.imageSource = iSource;
bc.set('ImageSource', iSource);
bc.set('Loaded', true);
});
}
}
So, after the initial load I am saving the imageSource as part of the global variable and on every other page I am getting it from there with the fallback of loading it from the URL is the image source is not available for this item.
I know this may raise some concerns about the amount of memory I am using to store the images, but since in my case, I am talking about no more than 2-3 images, I thought that this approach would not cause any memory issues.
I would love to hear any feedback on how to make this approach more efficient or if there is a better approach altogether.
You could use the nativescript-fresco plugin-in. It is an {N} plugin that is wrapping the popular Fresco library for managing images on Android. The plugin exposes functionality like: setting fade-in length, placehdler images, error images (when download is unsuccessful), corner rounding, dinamic sizing via aspect ration etc. for the full list of the advanced attributes you can refer this section of the readme. Also the plugin exposes some useful events that you can use to add custom logic when images are being retrieved from remote source.
In order to use the plugin simply initialize it in the onLaunch event of the application and call the .initialize() function:
var application = require("application");
var fresco = require("nativescript-fresco");
if (application.android) {
application.onLaunch = function (intent) {
fresco.initialize();
};
}
after that simply place the FrescoDrawee somewhere in your page and set its imageUri:
<Page
xmlns="http://www.nativescript.org/tns.xsd"
xmlns:nativescript-fresco="nativescript-fresco">
<nativescript-fresco:FrescoDrawee width="250" height="250"
imageUri="<uri-to-a-photo-from-the-web-or-a-local-resource>"/>
</Page>
I a working on a simple window phone application. In which I have two filed Name and Images.
I want to save this item and want to view all saved data.
Now My query How to select images to save? and How to save images and also get images to view.
I also used PhotoChooserTask but How to save selected image and how to get saved images?
I know about how to save image file in Isolated storage. But how to save selected images and get all data?
Thanks,
Hitesh.
Thanks for your reply. I knew about photoChooserTask. I also save my image file in isolated storage. But I dont know what is the images path to save images path in database and how to display all those images in datagrid. I have a table which have fields like ID, Name and Image path. I dont know what to save in imagepath filed if I saved image in isolated storage and how to display all data in datagrid.I used following code to save data into database. IN below code please correct the image path if I was wrong.
CategoryVO newCategory = new CategoryVO()
{
Name = txtCategoryName.Text,
ImagePath = txtCategoryName.Text.Trim() + ".jpg"
};
Expdb.Category.InsertOnSubmit(newCategory);
Expdb.SubmitChanges();
Using the PhotoChooserTask you can actually launch the photo chooser application and handle the selected image.
If you want to integrate this in your application, create the instance of the PhotoChooserTask and call the Show() method. If you want to handle the user’s selection, register the Completed event which will give you handle of the chosen photo.
var photoChooserTask = new PhotoChooserTask();
photoChooserTask.Completed += PhotoChooserTaskCompleted;
photoChooserTask.Show();
In the completed event implementation, you can get the chosen image as PhotoResult and set the image to your Image control or can use it in other places.
void PhotoChooserTaskCompleted(object sender, PhotoResult e)
{
switch (e.TaskResult)
{
case TaskResult.OK:
imageChooser.Source = new BitmapImage(new Uri(e.OriginalFileName));
break;
}
}
Source: http://www.codeproject.com/Articles/350126/How-to-use-the-PhotoChooserTask-to-Launch-the-Medi
Using Coldfusion 8 has anyone been able to either embed images into a excel spreadsheet (xlsx) or link them via img src?
Some background info: The cf server will pickup an excel document with product rows. Based on the product id and style etc, I be able to find or create an image that gets added as the first column into the existing excel doc.
I know coldfusion 9 has a function called SpreadsheetAddImage, unfortunately I'm on cf 8 with no chance to upgrade.
I am not sure what you are currently using to manipulate the xlsx files. However, the spreadsheet functionality in CF9 utilizes POI, which can obviously be used from CF8 as well. It just requires a little more low level code.
Pre-requisites:
Though POI is bundled with CF8, it is an old version. You need a newer version to manipulate .xlsx files. You can either use the javaLoader -OR- replace the existing jars in {cf_root}\lib folder. Note, I do not know if replacing the jars has any negative side effects.
Adding Images:
Excel does not really support <img> tags, only hyperlinks. However, you can embed images within the workbook like SpreadsheetAddImage does. As outlined in the POI's Busy Developers Guide, the basic process is:
Load the xlsx file with the WorkBookFactory
Grab the binary of each image and add it to the workbook
Anchor each image to the desired cells
Save the modified workbook to back to disk
Example:
<cfscript>
// ..
// load the xlsx file with the javaLoader
factory = loader.create("org.apache.poi.ss.usermodel.WorkbookFactory");
input = loader.create("java.io.FileInputStream").init( "c:/path/to/someFile.xlsx" );
workbook = factory.create( input );
input.close();
// get the desired sheet and load helper objects (once)
sheet = workbook.getSheet("Your Sheet Name");
patriarch = sheet.createDrawingPatriarch();
helper = workbook.getCreationHelper();
// add the image to the workbook
imageBytes = fileReadBinary( "c:/path/to/someImage.jpg" );
imageIndex = workbook.addPicture( imageBytes, workbook.PICTURE_TYPE_JPEG );
// anchor the picture to the first cell ie A1
anchor = helper.createClientAnchor();
anchor.setRow1( javacast("int", 0) ); // row of first cell (zero based)
anchor.setCol1( javacast("int", 0) ); // column of first cell (zero based)
picture = patriarch.createPicture( anchor, imageIndex );
picture.resize(); // only supported for jpg and png
// save it back to disk
outstream = loader.create("java.io.FileOutputStream").init( "c:/path/to/outFile.xlsx"" );
workbook.write( outstream );
outstream.flush();
outstream.close();
</cfscript>
New Columns
Ironically, inserting a new column is trickier than adding an image. Last I checked, POI still lacked a built in function for inserting new columns. So you would need to shift all existing cells to the right before inserting the images into the first column. The tricky part is maintaining cell formats, merged cells, etcetera.