How to add Annotations for winform using mschart?My codes doesn't work

Question

4.50/5 (2 votes)

See more:

I want the effect like this picture https://www.yousendit.com/download/UW15WmdrdGpsUi9OUjhUQw[^],My code is :

C#

chart1.Series.ElementAt(0).LegendText = "日期数量";
           chart1.ChartAreas[0].AxisX.LabelStyle.Format = "MM-dd HH" + "时";
           chart1.Series[0].XValueType = ChartValueType.DateTime;
           chart1.Series.ElementAt(0).ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Point;
           foreach (var item in Data)
           {
               DataPoint dp = new DataPoint();
               dp.SetValueXY(item.Key, item.Value);
               chart1.Series.ElementAt(0).Points.Add(dp);
           }

           LineAnnotation a = new LineAnnotation();
         a.Name = "lineAnnotation";
           a.ToolTip = "放批注";
           a.X = 1;
           a.Y = 1;
           a.Visible = true;
           chart1.Annotations.Add(a);
           //放批注
           chart1.Annotations[0].AnchorDataPoint = chart1.Series[0].Points[1];

I draw a line ,and want to give the second point annotations,but is seems failed?Can you tell me what is wrong?

Posted 21-Jan-13 4:47am

PEIYANGXINQU

Add a Solution

3 solutions

Solution 1

Just add another line before your foreach

chart1.Series.ElementAt(0).ChartType = SeriesChartType.Column;

Posted 21-Jan-13 12:35pm

Grasshopper.iics

Comments

PEIYANGXINQU 21-Jan-13 20:45pm

I have do this in the code up at line four,but it do not work
chart1.Series.ElementAt(0).ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Point;

Grasshopper.iics 21-Jan-13 20:47pm

You have set SeriesChartType.Point, it should be SeriesChartType.Column

PEIYANGXINQU 21-Jan-13 21:59pm

Thank you! I have change the type,but it still does not work.Can you give me a example??

[no name] 30-Apr-14 16:50pm

Thank you! I have change the type,

Solution 2

Check this code with a button click.

private void button1_Click(object sender, EventArgs e)
{

chart1.Series.ElementAt(0).LegendText = "Something";
chart1.ChartAreas[0].AxisX.LabelStyle.Format = "MM-dd HH" + "extra";
chart1.Series[0].XValueType = ChartValueType.DateTime;
chart1.Series.ElementAt(0).ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Point;
List<datapoint> Data = new List<datapoint>();
Data.Add(new DataPoint(1, 10));
Data.Add(new DataPoint(2, 20));
Data.Add(new DataPoint(3, 30));

chart1.Series.ElementAt(0).ChartType = SeriesChartType.Column;
foreach (var item in Data)
{
//DataPoint dp = new DataPoint();
//dp.SetValueXY(item.Key, item.Value);
chart1.Series.ElementAt(0).Points.Add(item);
chart1.Series.ElementAt(0).MarkerColor = Color.Red;
chart1.Series.ElementAt(0).ShadowColor = Color.Green;

chart1.Series.ElementAt(0).LabelBackColor = Color.Green;
}

LineAnnotation a = new LineAnnotation();
a.Name = "lineAnnotation";
a.ToolTip = "checking";
a.X = 1;
a.Y = 10;
a.Visible = true;
chart1.Annotations.Add(a);
//放批注
chart1.Annotations[0].AnchorDataPoint = chart1.Series[0].Points[1];
}

C#

Posted 21-Jan-13 17:20pm

Grasshopper.iics

Comments

PEIYANGXINQU 22-Jan-13 0:24am

Do you have run the code?I run,but it still do not work.This is the result:https://www.yousendit.com/download/UW13blR1Z2pWRC80WjlVag

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Grasshopper.iics · Accepted Answer · 2013-01-21T18:49:00

Hello. See the problem was, your Annotation style was LineAnnotation which does not display the text.

Now look the new snippet for annotation.

C#

CalloutAnnotation a = new CalloutAnnotation();
           a.Text = "My Annotation";
           a.ToolTip = "Annotation tool tip";
           a.ForeColor = Color.Green;
           //a.
           a.AnchorDataPoint = chart1.Series[0].Points[0];
           a.Visible = true;

           chart1.Annotations.Add(a);
           //放批注

           a.LineWidth = 2;

Now it's perfectly annotating, drawing Bar chart and also upon mouse hover over annotation point displaying the tooltip. Do let me know if it is working now. Should work.