Re: System.Windows.Forms.DataVisualization.Charting - C# Discussion Boards

Upin L wrote:
confused

Why? Most all programming languages allow switching on various data types.

Hi,

I am developing a Work Load Analysis platform and there I use System.Windows.Forms.DataVisualization.Charting. The problem i have is, Xaxis is not updated when switching between different value types in runtime.
Here is the code, which i use to update chart from DateTime valuetype to int.

Here _EndWeek and _StartWeek are integer parameters pass to this method.

C#

List<int> _Weeks = new List<int>();
int _Week_Difference = _EndWeek - _StartWeek;

for (int i = 0; i <= _Week_Difference; i++)
{
    _Weeks.Add(_StartWeek+ i);
}

chart_Utilization.Series[0].Points.Clear();
chart_Utilization.Series[1].Points.Clear();
chart_Utilization.Series[2].Points.Clear();

chart_Utilization.Series[0].XValueType = ChartValueType.Int32;
chart_Utilization.Series[1].XValueType = ChartValueType.Int32;
chart_Utilization.Series[2].XValueType = ChartValueType.Int32;

chart_Utilization.ChartAreas[0].AxisX.Interval = 1;
chart_Utilization.ChartAreas[0].AxisX.IntervalType = DateTimeIntervalType.Number;
chart_Utilization.ChartAreas[0].AxisX.IntervalOffsetType = DateTimeIntervalType.Number;

chart_Utilization.ChartAreas[0].AxisX.LabelStyle.Format = "{0:0}";
chart_Utilization.ChartAreas[0].AxisX.Minimum = 1;
chart_Utilization.ChartAreas[0].AxisX.Maximum = 53;

chart_Utilization.Update();

I would be glad, if some could help me in this case.

You cleared all your points; I don't see you adding any back in.

chart_Utilization.Series[0].Points.Clear();
chart_Utilization.Series[1].Points.Clear();
chart_Utilization.Series[2].Points.Clear();

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

The data is added in a loop after this piece of code. Data is added, but the X-Axis labelling is wrong. They are still in Datetime format.

The x-axis usually is "time" in a time-series. You've provided no new information.

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

I want to change the XAxis Value type to Int. How can i change it in runtime?
Because, the XAxis value type is dynamically changed according to the filter inputs from the user.

Then add "int" (object) points after your delete the previous points.

DataPointCollection.AddXY Method (System.Web.UI.DataVisualization.Charting) | Microsoft Docs

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

Thanks a lot for your reply. I created sample application with same code here for your reference.
This method is called when form is loaded.

C#

private void Format_Chart()
{

    ChartArea _Area = new ChartArea("Utilization");
    _Area.AlignmentOrientation = AreaAlignmentOrientations.Vertical;
    _Area.AlignmentStyle = AreaAlignmentStyles.All;
    chart_Utilization.ChartAreas.Add(_Area);
    chart_Utilization.ChartAreas["Utilization"].Position = new ElementPosition(0, 10, 100, 90);

    chart_Utilization.Series.Clear();

    Series _Series_Current_Utilization = new Series("Current Utilization");
    _Series_Current_Utilization.ChartArea = _Area.Name;
    _Series_Current_Utilization.XValueType = ChartValueType.Date;
    _Series_Current_Utilization.YValueType = ChartValueType.Double;
    _Series_Current_Utilization.YValuesPerPoint = 1;
    _Series_Current_Utilization.ChartType = SeriesChartType.StackedColumn;
    _Series_Current_Utilization.Color = Color.FromArgb(200, 20, 191, 154);

    Series _Series_Over_Utilization = new Series("Over Utilization");
    _Series_Over_Utilization.ChartArea = _Area.Name;
    _Series_Over_Utilization.XValueType = ChartValueType.Date;
    _Series_Over_Utilization.YValueType = ChartValueType.Double;
    _Series_Over_Utilization.YValuesPerPoint = 1;
    _Series_Over_Utilization.ChartType = SeriesChartType.StackedColumn;
    _Series_Over_Utilization.Color = Color.Red;//Color.FromArgb(80, 255, 0, 0);

    Series _Series_Target_Utilization = new Series("Target Utilization");
    _Series_Target_Utilization.ChartArea = _Area.Name;
    _Series_Target_Utilization.XValueType = ChartValueType.Date;
    _Series_Target_Utilization.YValueType = ChartValueType.Double;
    _Series_Target_Utilization.YValuesPerPoint = 1;
    _Series_Target_Utilization.ChartType = SeriesChartType.Line;
    _Series_Target_Utilization.Color = Color.FromArgb(200, 20, 191, 154);

    chart_Utilization.Series.Add(_Series_Current_Utilization);
    chart_Utilization.Series.Add(_Series_Over_Utilization);
    chart_Utilization.Series.Add(_Series_Target_Utilization);

    chart_Utilization.Legends[_Series_Current_Utilization.Legend].Docking = Docking.Top;
    chart_Utilization.Legends[_Series_Current_Utilization.Legend].Alignment = StringAlignment.Center;

    chart_Utilization.Legends[_Series_Target_Utilization.Legend].Docking = Docking.Top;
    chart_Utilization.Legends[_Series_Target_Utilization.Legend].Alignment = StringAlignment.Center;

    chart_Utilization.Legends[_Series_Over_Utilization.Legend].Docking = Docking.Top;
    chart_Utilization.Legends[_Series_Over_Utilization.Legend].Alignment = StringAlignment.Center;

    chart_Utilization.ChartAreas[0].AxisX.LabelStyle.Format = "yyyy-MM-dd";
    chart_Utilization.ChartAreas[0].AxisX.Interval = 1;
    chart_Utilization.ChartAreas[0].AxisX.IntervalType = DateTimeIntervalType.Days;
    chart_Utilization.ChartAreas[0].AxisX.IntervalOffset = 1;

    chart_Utilization.ChartAreas[0].AxisY.Maximum = (double)(120);
    chart_Utilization.ChartAreas[0].AxisY.Minimum = (double)(0);
}

There are two button click events to change the value type of XAxis.

1. To change to ChartValueType.Date

C#

private void btnDates_Click(object sender, EventArgs e)
        {
            List<double> _Values = new List<double>();
            int _Count = 1;

            for(int i = 0; i < 10; i++)
            {
                _Values.Add(i * 2.5d);
            }
            chart_Utilization.Series["Current Utilization"].Points.Clear();
            chart_Utilization.Series["Over Utilization"].Points.Clear();
            chart_Utilization.Series["Target Utilization"].Points.Clear();

            chart_Utilization.Series["Current Utilization"].XValueType = ChartValueType.Date;
            chart_Utilization.Series["Over Utilization"].XValueType = ChartValueType.Date;
            chart_Utilization.Series["Target Utilization"].XValueType = ChartValueType.Date;

            chart_Utilization.ChartAreas[0].AxisX.Interval = 1;
            chart_Utilization.ChartAreas[0].AxisX.IntervalType = DateTimeIntervalType.Days;
            chart_Utilization.ChartAreas[0].AxisX.IntervalOffset = 1;

            foreach(double _dval in _Values)
            {
                var _point_current = new DataPoint(chart_Utilization.Series["Current Utilization"]);
                var _point_target = new DataPoint(chart_Utilization.Series["Target Utilization"]);
                var _point_over = new DataPoint(chart_Utilization.Series["Over Utilization"]);

                _point_current.SetValueXY(new DateTime(DateTime.Now.Year, DateTime.Now.Month, _Count), _dval);
                _point_target.SetValueXY(new DateTime(DateTime.Now.Year, DateTime.Now.Month, _Count), _dval);
                _point_over.SetValueXY(new DateTime(DateTime.Now.Year, DateTime.Now.Month, _Count), _dval);

                chart_Utilization.Series["Current Utilization"].Points.Add(_point_current);
                chart_Utilization.Series["Target Utilization"].Points.Add(_point_target);
                chart_Utilization.Series["Over Utilization"].Points.Add(_point_over);

                _Count++;
            }
        }

2. To change to ChartValue type to Int

C#

private void btnInt_Click(object sender, EventArgs e)
        {
            List<double> _Values = new List<double>();
            int _Count = 1;

            for (int i = 0; i < 10; i++)
            {
                _Values.Add(i * 5d);
            }

            chart_Utilization.Series[0].Points.Clear();
            chart_Utilization.Series[1].Points.Clear();
            chart_Utilization.Series[2].Points.Clear();

            chart_Utilization.Series[0].XValueType = ChartValueType.Int32;
            chart_Utilization.Series[1].XValueType = ChartValueType.Int32;
            chart_Utilization.Series[2].XValueType = ChartValueType.Int32;

            chart_Utilization.ChartAreas[0].AxisX.Interval = 1;
            chart_Utilization.ChartAreas[0].AxisX.IntervalType = DateTimeIntervalType.NotSet;
            chart_Utilization.ChartAreas[0].AxisX.IntervalOffsetType = DateTimeIntervalType.NotSet;

            chart_Utilization.ChartAreas[0].AxisX.LabelStyle.Format = "{0:0}";
            chart_Utilization.ChartAreas[0].AxisX.Minimum = 1;
            chart_Utilization.ChartAreas[0].AxisX.Maximum = 53;

            chart_Utilization.Update();

            foreach (double _dval in _Values)
            {
                var _point_current = new DataPoint(chart_Utilization.Series["Current Utilization"]);
                var _point_target = new DataPoint(chart_Utilization.Series["Target Utilization"]);
                var _point_over = new DataPoint(chart_Utilization.Series["Over Utilization"]);

                _point_current.SetValueXY(_Count, _dval);
                _point_target.SetValueXY(_Count, _dval);
                _point_over.SetValueXY(_Count, _dval);

                chart_Utilization.Series["Current Utilization"].Points.AddXY(_Count, _dval);
                chart_Utilization.Series["Target Utilization"].Points.AddXY(_Count, _dval);
                chart_Utilization.Series["Over Utilization"].Points.AddXY(_Count, _dval);

                _Count++;
            }
        }

When i switch from Date to Int, the XAxis labelling still apears as DateTime value type. This is my issue.
Please let me know in which way i can solve this issue.

I solved the problem by myself.

It is by setting IsXValueIndexed = true for each series allocated for the chart area.

Good to hear.

Samples Environments for Microsoft Chart Controls in C#, HTML

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food

I want to load an Excel file which contains my data, then create pivot table and pivot chart based on that file. Is there any library (free one) that can do this without limitation? Confused | :confused:

Alex Dunlop wrote:
Is there any library ...

That is a question for Google. The generally useful libraries for accessing Excel data are in Microsoft.Office.Interop.Excel Namespace | Microsoft Docs[^], and the Microsoft Access Database Engine 2016 Redistributable from Official Microsoft Download Center[^].

How to change data by using a removable disk in C Sharp language

You're going to have to be a lot clearer about what your problem is: we cannot work out from that little what you are trying to do.
Remember that we can't see your screen, access your HDD, or read your mind - we only get exactly what you type to work with.

"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
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I have a database designed in C Sharp, and I have to modify this data via the Internet remotely. I want a way to modify the data by means of a removable disk so that the user takes the disk and inserted it into his device and then the modification is done

You can't do that automatically anymore - at least not without getting the user to change his settings, and that dangerous: Using AutoPlay and AutoRun in Windows 10 (Article from SamLogic)[^]
It's dangerous because it means any executable disk that's inserted will autorun, and it was disabled because of virus / trojan activity using it. Certainly, I wouldn't enable it on my systems!

So you would have to run an app on the client computer that either processes the data, or which detects a removable disk being inserted - this may help: Detecting USB Drive Removal in a C# Program[^]

"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
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You don't understand what I mean yet

I have a database of 500 employees
And I have another device with the same employee database that I have. I want in the event that I change the employee's data, then transfer the update to the disk and give it to the user to get the update on the data of his employees

So what part of that do you need help with?

"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
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I want to update the data via the removable disk

And what part of that is proving difficult?

Seriously, I can't read your mind - so repeating the lack of information you didn't give us in the first place doesn't help anybody!

"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!

La base de données est dans mon appareil et je souhaite apporter des modifications au niveau de la base de données client à partir de mon appareil car je suis le seul autorisé à apporter des modifications aux données car je suis l'administrateur

Google Tranlate:
The database is in my device and I want to make changes at the customer database level from my device because I am the only one allowed to make changes to the data because I am the administrator

modified 15-Jan-21 7:32am.

Veuillez utiliser l'anglais ici. J'ai traduit votre message pour vous cette fois

For the third time:

Quote:
And what part of that is proving difficult?

What have you tried?
Where are you stuck?
What help do you need?

I'm not trying to be difficult, but you aren't telling us anything!

Quote:
Et quelle partie de cela s'avère difficile?

Qu'avez-vous essayé?
Où es-tu coincé?
Quelle aide avez-vous besoin?

Je n'essaye pas d'être difficile, mais tu ne nous dis rien!

"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!

As OG said this cannot be done automatically. There should be an application that uses the database, you need to write an update process in that application to read the data from the removable drive and update the database.

In other words YOUR USER has to initiate the process somehow and you need to write the process.

Never underestimate the power of human stupidity -
RAH
I'm old. I know stuff - JSOP

I want an example in C Sharp