How to Save Various Charts in WPF?

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I need to save an image of a chart in WPF so that the chart can be viewed without running my application. How would I do this?

[OP to supply the details of the charting component he's using]

Posted 16-May-12 23:02pm

sankar6664

Updated 17-May-12 0:22am

Pete O'Hanlon

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Pete O'Hanlon · Answer 1 · 2012-05-16T23:28:00

Solution 1

You don't save the charts, you save the data that is used to make the charts. There's no need to save the actual chart because it is simply a visual representation of the data.

Posted 16-May-12 23:28pm

Pete O'Hanlon

Comments

sankar6664 17-May-12 5:32am

I want to store the Chart also...

Pete O'Hanlon 17-May-12 5:36am

Why? What business problem are you trying to solve? If you save the data, you can simply recreate the chart the next time you open it.

sankar6664 17-May-12 5:39am

I am doing my project work in a private company.
In that project work,I am going to show that chart as a image.

Pete O'Hanlon 17-May-12 5:50am

Is this in hard copy, or still in the Silverlight window? If it's hard copy, just take a screen shot.

sankar6664 17-May-12 5:57am

It is in the format of chart in wpf window

Pete O'Hanlon 17-May-12 6:05am

Let me see if I can explain this simply for you. You have a chart that is made up of data. That chart is displayed in a window. When you reopen that window, the chart will still be made up of the data. Your alternative is to save a bitmap of that chart, but then you can do nothing with it - other than display it as an image where the chart should be. Why do this when you can simply redisplay the chart?

What I am trying to tell you here is, forget the idea of saving the chart. The chart is just a visual version of the data. Save the data and redisplay the chart from the data. If you can display the chart once off the data, you can do it more than once.

sankar6664 17-May-12 6:11am

I Understand Your Point,But I want to Store that Chart as a image.
So Only I want to show the image without running the program eachtime.

In your Point of view,Each time you want to see the chart,eachtime you want to run the project.

That's Why...I want to save the file

Pete O'Hanlon 17-May-12 6:21am

This is the detail you should have put in your question, rather than having to go through a series of painful back and forths to finally get to your requirement. When I asked what business problem you were trying to solve, this is the answer you should have given.

The simple answer then is that you need to save your chart as a Bitmap. As I have no idea which particular chart control you are using, I can't get anymore specific than that.

sankar6664 17-May-12 6:24am

consider a website which retrieves data from database and creates a pie chart.I need to store that pie chart as a image(.jpg or in some format).what will be the solution?

Pete O'Hanlon 17-May-12 6:27am

Are you even reading my replies? What chart component are you using? Where did this website suddenly come from? Edit your question and detail ALL the parts of the question don't just add parts as you go along. Quite frankly, the question you started off with bears very little relation to this question now.

Pete O'Hanlon 17-May-12 6:23am

I have updated your question to show what you should have said. All you have to do is edit it to supply the chart component you are using.

sankar6664 17-May-12 6:36am

I get the values from excel file and i want to get a image file from that inputs.
How do I get that?

Pete O'Hanlon 17-May-12 6:41am

Lord preserve me from wanting to throttle you. Would it help if I type slowly? WHAT CHART COMPONENT ARE YOU USING TO DISPLAY THE CHART?

How can I tell you to save the image if I don't know what you are using? Just answer this simple question. It's not a hard one to answer.

sankar6664 17-May-12 7:33am

chart component meant i really don't know.

Pete O'Hanlon 17-May-12 7:36am

If you have the code in front of you, and you don't know what chart component you are using, then how can we be expected to help you?

sankar6664 17-May-12 7:40am

You can take any of the code which is having chart(in wpf),now how to save that chart into image file?

Pete O'Hanlon 17-May-12 8:01am

From this, I take it that you haven't actually written ANY code to display a chart in the first place.

Wendelius 17-May-12 8:43am

Now I understand your comment to my question on the other thread :) 5 for this.

Pete O'Hanlon 17-May-12 8:59am

Thanks Mika. It's exasperating to say the least.

Wendelius 17-May-12 9:03am

I can imagine :)

Pete O'Hanlon · Answer 2 · 2012-05-17T01:52:00

Saints preserve us. OK, as you haven't specified a chart component, and given that my previous answer to you lead to a conversation that was an exercise in complete futility, here's the code I would use to save a visual element out to file.

C#

int chartWidth = (int)chart.ActualWidth;
int chartHeight = (int)chart.ActualHeight;
double resolution = 96d;
RenderTargetBitmap bmp = new RenderTargetBitmap(chartWidth, chartHeight, resolution, resolution, PixelFormats.Pbgra32);
bmp.Render(chart);
BmpBitmapEncoder encoder = new BmpBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bmp));
encoder.Save(...my file stream ...);

I've left out the code for creating the stream - you really should be able to figure that one out for yourself, and I've made assumptions that you want a 96x96 DPI image.