CODEWITHSUNDEEP
c#asp.netcharts
sd_dracula
sd_dracula

Reputation: 3896

.net chart clear and re-add

I have a chart and I need to clear it in order to populate it with different values. The chart has 3 series, all defined in the .aspx page.

The problem is when I call

chart.Series.Clear();

and then re-add the series like:

chart.Series.Add("SeriesName");

It doesn't keep any of the attributes of the 3 initial series. How to just clear the values and keep the series attributes?

Upvotes: 19

Views: 84606

Answers (5)

ajinkya
ajinkya

Reputation: 362

I Faced kind of problem(but for windows form Application). So can you please tell me when are you passing the datasource to the charts.

I Used incorrect order while passing the data to the chart control

At first time I did this :

chart1.Series["Series1"].XValueType = System.Windows.Forms.DataVisualization.Charting.ChartValueType.Auto;

chart1.DataSource = sqlChartTabel; //sqlChartTable is my DataTable
// Assigning new Data to the charts
chart1.Series.Clear();   // clearing chart series (after the DataTable is assigned with data)
chart1.Series.Add("Violations");
chart1.Series["Series1"].XValueMember = "Month_name";
chart1.Series["Series1"].YValueMembers = "Salary";
chart1.ChartAreas["ChartArea1"].AxisX.Title = "Months";
chart1.ChartAreas["ChartArea1"].AxisY.Title = "Salary";
chart1.DataBind();
chart1.Visible = true;

So, then I realized, I am Assigning the data before clearing the chart so I just changed my statement order, And It Worked :

My Working code :

chart1.Series.Clear();   // changed position of clear(before Assigning the datatable)
chart1.Series.Add("Violations");
chart1.Series["Series1"].XValueType = System.Windows.Forms.DataVisualization.Charting.ChartValueType.Auto;
chart1.DataSource = sqlChartTabel;   //sqlChartTable is my DataTable

// Assigning new Data to the charts
chart1.Series["Series1"].XValueMember = "Month_name";
chart1.Series["Series1"].YValueMembers = "Salary";
chart1.ChartAreas["ChartArea1"].AxisX.Title = "Months";
chart1.ChartAreas["ChartArea1"].AxisY.Title = "Salary";
chart1.DataBind();
chart1.Visible = true;

Upvotes: 1

user3939328
user3939328

Reputation: 1

This works for me

foreach(var series in chart.Series)
{
    series.Points.Clear();
}
reloadData();
this.chart.DataBind();

Upvotes: 0

GÖKAY GÖK
GÖKAY GÖK

Reputation: 81

This should work

 chartnameHERE.Series["SeriesNameHERE"].Points.Clear();

Upvotes: 8

user2954518
user2954518

Reputation: 309

This will actually completely remove the series from the chart (not just remove the points from the series). 

while (chart1.Series.Count > 0) { chart1.Series.RemoveAt(0); }

Upvotes: 3

James Hill
James Hill

Reputation: 61792

This should work:

foreach(var series in chart.Series) {
    series.Points.Clear();
}

Upvotes: 45

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