showing multiple labels on graph using ms chart controls

I would just use the dates to scale the X-Axis, then the counters as Y-Axis and then make two colums with different colours to represent done and undone.

It should be much easier and probably easier to understand too.

example:

                                       __20__
20                                     |     |                   U = Undone
              __15__                   |     |                   D = Done
15            |     |                  |     |                   X = Status number 3
     __10__   |     |         __11__   |     |                   Y = Status number 4
10   |     |  |     |         |     |  |     |                   ... and so on
     |     |  |     |         |     |  |     |
5    |     |  |     |         |     |  |     |
     |  U  |  |  D  |         |  U  |  |   D |
------------------------------------------------------------------------------------
         19/08/2014               20/08/2014

Do you get the idea?

If you don't want it like that, then please explain better what you want to do.

addition after OP's comment
Then make 6 different bars for each day. Where is the problem?

I can understand that you prefer to put the count at top of bar because between 10 and 11 or close numbers won't be really easy to see the difference on the lenght of the bar.

If the MS-Chart doesn't allow you to put the labels there (but I think it should be possible), then you can think on a workaround creating your own labels and moving them to the right places. It will need a bit maths but it should be not so difficult.

Example:
Each status bar is 20 pixels wide and each +1 in the counter is 5 pixels high.

You could get the window-pos of the chart drawing area and then something like:

Don't forget this is just an example so you see how it could be done as a workaround

Label 1 X = 
50 pixels for Y-Axis legends and a bit empty space to the first bar
+ 
2 or 3 pixels so that the label is centered in the bar
+
(20 pixels * (which bar - 1) //// in case of 6 stati, you would have 0 to 5 as values
+
(40 pixels * (Which day position - 1)) /// in your case 19.08 would give 0, 20.08 would give 1

and

Label 1 Y = 
Height of the chart 
-  ///minus if the 0,0 coordinates are in top-left corner as usual, if not... then just adapt
(
40 pixels for the X-Axis legends /// you don't need more because 0 counter is in X-Axis itself
+
(5 pixels/unit * (Counter + 1)) /// counter + 1 because you want a bit space from the bar to the label
)

Once you have your position, then just write your own counter label there.

To put what represents each bar is easier if you just do it as I did, you can wirte below the chart what each is. The Y-Axis value would be fixed and the X-Axis values would be the same as for the counter


On the other hand...
To be honest, if you have 6 bars a day, you are going to be out of space very fast. In that case I would recommend you to use a linear grafic where each status get a line and a colour.

I mean the art of graphic like

   .___.     .      .
  /     \   / \.__./
 /       \./
/

It will give you much more place to draw more days, keeping it readable, and simplifying it, because you have only one X-Coordinate each day, only need to calculate the Y-Coordinate for each status (just in case the MS-Chart doesn't do it automatically for you).