Sql query count/groupe | get integer out of query | display to chart C#

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Hi to everybody,

first let me describe what i want to do:

I want to display the frequency of the entries in a mysql datatable to a chart
(bar graph).

For example the table contains the entries: 5 times entry1, 8 times entry2 and 15 times entrie3. I want to display that to a chart(bar graph). I think you can image how it would look like. The X-Axis contains the names of each entry and the height of the bar represents the frequency of that entry. I need to sort the bars by frequency (most recorded entry first)

Can somebody tell me if there is an easy way to do this? I dont know if the best way is to count the entries and extract the count number to an integer. Anyway i have no clue how to do this. Maybe there is a direct way to connect a chart to a mysql database and display the data in the desired way?

I would appreciate it if somebody would give ma a suggestion, Thanks a lot.

What I have tried:

sql statements: Count, Groupe by, DESC
Reading about Charts in C#

Posted 17-Nov-16 1:57am

Member 12341536

Updated 17-Nov-16 2:27am

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OriginalGriff · Accepted Answer · 2016-11-17T02:27:00

Solution 1

Try:

SQL

SELECT Frequency, COUNT(*) FROM MyTable GROUP BY Frequency

Load that into a DataTable via an SqlDataAdapter, and pass that to your chart, or convert it to a collection of objects which contains the X and Y data.
This may help: Using a Chart With Multiple Lines From A Collection[^]

Posted 17-Nov-16 2:27am

OriginalGriff

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Member 12341536 17-Nov-16 9:29am

Hi thank you for answering,

well these are a lot of steps obviously. Would you give me an example code on how to pass information to the chart? this is my biggest problem.. :(

Member 12341536 17-Nov-16 14:09pm

I have figuered it out myself, thanks anyway for the suggestion.

OriginalGriff 17-Nov-16 14:19pm

Well done! You're welcome!