Develop Reference

MigraDoc - Get height of section

What I'm trying to achieve is to have the same content twice on the page, separated by a dotted line, with padding so that the one copy is on the top-half and the second is on the bottom half. Something like firstSection.SpaceAfter = (height of page / 2) - (height of first section)
tl;dr: How do I calculate the height of the first section after everything is added?
I have this, which has the copied content and the dotted line, but I need the padding.
Document document = new Document();
document.Info.Title = "Testing";
Style style = document.Styles["Normal"];
style.Font = new Font("Times New Roman", 12);
Section section = document.AddSection();
section.PageSetup = document.DefaultPageSetup.Clone();
Paragraph paragraph = section.AddParagraph("Hello");
paragraph = section.AddParagraph("World");
paragraph = section.AddParagraph();
paragraph.Format.Borders.Bottom = new Border
{
Width = "1pt",
Color = Colors.Black,
Style = BorderStyle.DashLargeGap
};
paragraph = section.AddParagraph("Hello");
paragraph = section.AddParagraph("World");

To answer your question:
The content only has a height when you render it to some output format (e.g. PDF).
Let the PDF Renderer prepare the document and then you will be able to query position and height for every object in the document.
Alternative solutions:
My attempt #1 would be: create a Table and set the height of the first row to cover the top half of the page; add the contents for the lower half of the page to the second row; hide the borders to make the table invisible.
My attempt #2 would be: create a TextFrame at an absolute position for the lower half of the page; add the contents normally to the section and also add them to the TextFrame.
In both cases you must make sure the contents fit into a half page.

Align two charts-areas one on top of the other [duplicate]

I have one Chart and three ChartArea that are aligned in view, zoom, cursor:
this is my related previous post. All things works well except that the three ChartArea are not aligned at the beginning. Following an image of the problem:
I think it depends from the digit's number of Y values axis. From some research I try the following configuration:
// selezione e zoom
dlChart.ChartAreas[VOLTAGE_AREA].CursorX.Interval = 1;
dlChart.ChartAreas[VOLTAGE_AREA].CursorX.IsUserEnabled = true;
dlChart.ChartAreas[VOLTAGE_AREA].CursorX.IsUserSelectionEnabled = true;
// generale
dlChart.ChartAreas[VOLTAGE_AREA].AxisX.LabelStyle.Format = "dd/MM/yy - HH:mm:ss.fff";
dlChart.ChartAreas[VOLTAGE_AREA].AxisX.ScaleView.Zoomable = true;
dlChart.ChartAreas[VOLTAGE_AREA].AxisY.LabelStyle.Format = "D5";
In witch the last row:
dlChart.ChartAreas[VOLTAGE_AREA].AxisY.LabelStyle.Format = "D5";
should specifies always five digits. This mitigate in some way the problem but it doesn't desappers. Furthermore with this row the program starts to throws very lots exceptions of form below any time I scroll the graph:
Generate exception: 'System.FormatException' in mscorlib.dll
Does anyone knows the solution for this problem? Thanks in advance.

You may want to take control of the size of the InnerPlotPosition.
(But Baddack's solution is simpler and more flexible!)
Here is an example:
After setting up a Chart with three CharAreas, setting Minima and Maxima as well as adding one DataPoint to each we get this :
Your issue is showing clearly.
After setting the InnerPlotPosition to a fixed percentage it looks like this:
Here is how to set the InnerPlotPosition size:
ca1.InnerPlotPosition = new ElementPosition(10, 5, 80, 90);
ca2.InnerPlotPosition = new ElementPosition(10, 5, 80, 90);
ca3.InnerPlotPosition = new ElementPosition(10, 5, 80, 90);
Note that both ChartArea.Position and ChartArea.InnerPlotPosition are called 'Position' but really are areas of percentages referring to the respective containers!
So my example has a Left distance of 10%, a Top space of 5% and Width of 80% and Height of 90%. Which leaves 10% space at the Bottom and 5% at the Right. Note: All are referring to the ChartAreas not the ClientArea of the Chart! (Which are still at Auto, which maximizes the size.)
This was my initial setup:
ChartArea ca1 = chart.ChartAreas[0];
ChartArea ca2 = chart.ChartAreas[1];
ChartArea ca3 = chart.ChartAreas[2];
Series s1 = chart.Series[0];
Series s2 = chart.Series.Add("Series2");
Series s3 = chart.Series.Add("Series3");
s2.ChartArea = ca2.Name;
s3.ChartArea = ca3.Name;
s1.Points.AddXY(1, 7);
s2.Points.AddXY(1, 777);
s3.Points.AddXY(1, Math.PI);

Have you tried using the chart area alignment options? I would try something like:
//define inner plot position of the chart areas
dlChart.ChartAreas[0].InnerPlotPosition.Auto = true;
dlChart.ChartAreas[1].InnerPlotPosition.Auto = true;
dlChart.ChartAreas[2].InnerPlotPosition.Auto = true;
//set our second chart area's alignments to match our first chart area
dlChart.ChartAreas[1].AlignmentOrientation = AreaAlignmentOrientations.Vertical;
dlChart.ChartAreas[1].AlignmentStyle = AreaAlignmentStyles.All;
dlChart.ChartAreas[1].AlignWithChartArea = dlChart.ChartAreas[0].Name;
//set our third chart area's alignments to match our first chart area
dlChart.ChartAreas[2].AlignmentOrientation = AreaAlignmentOrientations.Vertical;
dlChart.ChartAreas[2].AlignmentStyle = AreaAlignmentStyles.All;
dlChart.ChartAreas[2].AlignWithChartArea = dlChart.ChartAreas[0].Name;

Chart : displaying boolean flags in a time plot as filled rectangles (instead of as lines)

I use the C# Chart in WinForms to plot a variety of variables in real time using the "line" chart type. That works well for analog values, but it's less than ideal for on/off flags.
I'd like to plot multiple flags as horizontal bars that are filled when the value is '1" and clear when the value is '0'.
Before I start coding a solution from scratch, do you have any suggestion on how I could take advantage of any features of the "chart" object to implement this more effectively?
EDIT: I am playing with the Area type, and it seems to be promising.
EDIT 2: That didn't work, because the area in the Area type always starts at the bottom of the chart, hiding the other rows. I am now trying the Range Column type

There are several ways to tackle this.: StackedBars, AreaChart, Annotations but I think by far the simplest is using a LineChartType.
The first issue is: How to create the gaps? The simplest way is to draw them as lines but with Color.Transparent. So instead of using the flag value as our y-value we use it to set the color..
So we could use a function like this:
void AddFlagLine(Chart chart, int series, int flag, int x)
{
Series s = chart.Series[series];
int px = s.Points.AddXY(x, series);
s.Points[px].Color = s.Color;
if (px > 0) s.Points[px - 1].Color = flag == 1 ? s.Color : Color.Transparent;
}
It takes the index of your Series and uses the flag to determine the color; note that the color of a line segment is controlled by the color of the end point.
So if you want to have the line going out from the new point to have its flag color, you need to set it when adding the next one..
This is simple enough and for lines as thick as 1-10 it works fine. But if you want larger widths things get a bit ugly..:
The rounded caps start to get bigger and bigger until they actually touch, flling the gaps more or less.
Unfortunately there seems to be no way to controls the caps-style of the lines. There are many CustomAttributes including DashStyles but not this one. So we have to resort to owner-drawing. This is rather simple for line charts. Here is an example:
The xxxPaint event looks like this:
private void chart_PostPaint(object sender, ChartPaintEventArgs e)
{
Graphics g = e.ChartGraphics.Graphics;
Axis ax = chart.ChartAreas[0].AxisX;
Axis ay = chart.ChartAreas[0].AxisY;
for (int si = 0; si < chart.Series.Count; si++ )
{
Series s = chart.Series[si];
for (int pi = 1; pi < s.Points.Count - 1; pi++)
{
DataPoint dp = s.Points[pi];
int y = (int) ay.ValueToPixelPosition(dp.YValues[0]+1); ///*1*
int x0 = (int)ax.ValueToPixelPosition(ax.Minimum);
int x1 = (int)ax.ValueToPixelPosition(s.Points[pi-1].XValue); ///*2*
int x2 = (int)ax.ValueToPixelPosition(dp.XValue);
x1 = Math.Max(x1, x0);
x2 = Math.Max(x2, x0);
using (Pen pen = new Pen(dp.Color, 40) ///*3*
{ StartCap = System.Drawing.Drawing2D.LineCap.Flat,
EndCap = System.Drawing.Drawing2D.LineCap.Flat })
{
g.DrawLine(pen, x1, y, x2, y);
}
}
}
A few notes:
1 : I have decided to move the the series up by one; this is up to you just as using or turning off the y-axis labels or replacing them by custom labels..
2 : Here we use the previous point's x-position!
3 : Note that instead of hard coding a width of 40 pixels you really should decide on a calculated width. This is an example that almost fills up the area:
int width = (int)( ( ay.ValueToPixelPosition(ay.Minimum) -
ay.ValueToPixelPosition(ay.Maximum)) / (chart7.Series.Count + 2));
You can twist is to fill more or less by adding less or more than 2.
I have turned all BorderWidths to 0 so only the drawn lines show.

I got it:
It turned out to actually be pretty easy; I used the Range Column type.
A) Set-up (done once):
plotChart.Series[chanNo].ChartType = SeriesChartType.RangeColumn;
plotChart.Series[chanNo].CustomProperties = "PointWidth=" + noOfFlags;
PointWidth is required to set the relative width of each rectangle so that it fills the entire width of one data point (if too small, there are gaps in the horizontal bar; if too large, there is overlap). noOfFlags is the number of flags shown (in the example shown above, noOfFlags = 4). (By the way the MSDN documentation is wrong: PointWidth is not limited to 2.)
B) Plotting (done for each new data point):
baseLine--;
int barHeight = flagHigh ? 1 : 0;
plotChart.Series[chanNo].Points.AddXY(pointX, baseLine, baseLine + barHeight);
flagHigh is a bool that is equal to the flag being monitored.
baseLine is decremented for each trace. In the example above, baseLine starts at 4, and is decremented down to 0.
Note that for each data point, RangeColumn requires 2 "Y" values: one for the bottom of the rectangle, one for the top; in the code, I set the bottom Y to the bottom of the row that I use for that particular flag, and the top to 1 above the bottom, to give me a height of 1.

Autofit Row Height of Merged Cell in EPPlus

I'm using EPPlus and C# and trying to autosize/autofit the height of a row to accommodate the height needed to show all of the contents of a merged cell with text wrapping. However no matter what I try the text always truncates. Since I'm repeating this process with various text sizes on various worksheets, I don't want to hard code the row height (except to enforce a minimum height for the row). If possible I'd like to do this within EPPlus/C#.
With the cells A2:E2 merged and WrapText = true:
Cell with Text Truncated
Here's what it should look like with desired Cell Height
Here's my relevant and short C# code
Int32 intToCol;
intToCol = 5;
eppWorksheet.Cells[2, 1, 2, intToCol].Merge = true;
eppWorksheet.Cells[2, 1].Style.WrapText = true;
//Check if at the minimum height. If not, resize the row
if (eppWorksheet.Row(2).Height < 35.25)
{
eppWorksheet.Row(2).Height = 35.25;
}
I've looked at Autofit rows in EPPlus and it didn't seem to directly answer my question unless I'm reading it wrong.

Here is the solution in a reusable method. Pass in the text value, font used for the cell, summed width of the columns merged, and receive back the row height. Set the row height with the result.
Use of Method
eppWorksheet.Row(2).Height = MeasureTextHeight(cell.Value, cell.Style.Font, [enter the SUM of column widths A-E]);
Reuseable Method
public double MeasureTextHeight(string text, ExcelFont font, double width)
{
if (text.IsNullOrEmpty()) return 0.0;
var bitmap = _bitmap ?? (_bitmap = new Bitmap(1, 1));
var graphics = _graphics ?? (_graphics = Graphics.FromImage(bitmap));
var pixelWidth = Convert.ToInt32(width * 7); //7 pixels per excel column width
var fontSize = font.Size * 1.01f;
var drawingFont = new Font(font.Name, fontSize);
var size = graphics.MeasureString(text, drawingFont, pixelWidth, new StringFormat { FormatFlags = StringFormatFlags.MeasureTrailingSpaces });
//72 DPI and 96 points per inch. Excel height in points with max of 409 per Excel requirements.
return Math.Min(Convert.ToDouble(size.Height) * 72 / 96, 409);
}

I have used a workaround for this and I a had print area A:Q.
I copied merged cells value to column z.
set width of column z to merge cells width.
Then set auto row height true in format.
Hide the z column.
Set print area A:Q
Cons:
There are duplicate data. But we are okay since report is printing and not print z column.
Pros:
Row height works correctly not like calculation method.

Had to tweak the code a little bit by removing the multiplication factor at the return line. May be because i am using this code to get the width of the column.
ws1.Column(colIndx).Width * 7
The multiplication factor is the number of columns been merged.

Custom X/Y grid line in MSChart control

I have a C# windows form with a simple 2D line chart that I want to add custom X or Y axis markers to, and draw a custom grid line (in a highlighted color, dotted line for example). I have looked at the customLabels property, but this seems to override the default grid, which I still want to display. This is to illustrate something like a threshold or a cutoff. How can I do this with the MSChart control?
Many thanks

Could you achieve what you want with striplines?
In the ms chart samples (get it here http://archive.msdn.microsoft.com/mschart), inside the "Using Custom Labels" section, they use striplines on the Y axis which are quite effective at highlighting ranges of values. They also do not affect the grid ... I checked that by changing the sample code a little so I could easily move the boundaries of the striplines around (see below).
double low_med = 17; // was 30
double med_hi = 92; // was 70
// Set Y axis custom labels
axisY.CustomLabels.Add(0, low_med, "Low");
axisY.CustomLabels.Add(low_med, med_hi, "Medium");
axisY.CustomLabels.Add(med_hi, 100, "High");
StripLine stripLow = new StripLine();
stripLow.IntervalOffset = 0;
stripLow.StripWidth = low_med;
stripLow.BackColor = Color.FromArgb(64, Color.Green);
StripLine stripMed = new StripLine();
stripMed.IntervalOffset = low_med;
stripMed.StripWidth = med_hi - low_med;
stripMed.BackColor = Color.FromArgb(64, Color.Orange);
StripLine stripHigh = new StripLine();
stripHigh.IntervalOffset = med_hi;
stripHigh.StripWidth = 100 - med_hi;
stripHigh.BackColor = Color.FromArgb(64, Color.Red);
axisY.StripLines.Add(stripLow);
axisY.StripLines.Add(stripMed);
axisY.StripLines.Add(stripHigh);