> For the complete documentation index, see [llms.txt](https://docs.wisej.com/extensions/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wisej.com/extensions/extensions/smoothiechart/api/wisej.web.ext.smoothiechart.smoothiechart.md).
# SmoothieChart
Namespace: **Wisej.Web.Ext.SmoothieChart**
Assembly: **Wisej.Web.Ext.SmoothieChart** (3.2.0.0)
* [Control](https://docs.wisej.com/api?q=wisej.web.control)
* [SmoothieChart](/extensions/extensions/smoothiechart/api/wisej.web.ext.smoothiechart.smoothiechart.md)
Implements the SmoothieChart (). A JavaScript charting library for streaming data.
{% tabs %}
{% tab title="C#" %}
```csharp
public class SmoothieChart : Control
```
{% endtab %}
{% tab title="VB.NET" %}
```visual-basic
Public Class SmoothieChart
Inherits Control
```
{% endtab %}
{% endtabs %}
## Constructors
### SmoothieChart()
constructor
## Properties
### BackColor
[Color](https://docs.microsoft.com/en-us/dotnet/api/system.drawing.color): Returns or sets the background color for the control. (Default: `Color [Black]`)
### BorderStyle
[BorderStyle](https://docs.wisej.com/api?q=wisej.web.borderstyle): Indicates the border style for the control. (Default: `None`)
### DataFrequency
[Int32](https://docs.microsoft.com/en-us/dotnet/api/system.int32): DataFrequency in milliseconds. It is the interval between data requests. (Default: `500`)
### FontSize
[Int32](https://docs.microsoft.com/en-us/dotnet/api/system.int32): Returns or sets the text color for the control. (Default: `10`)
### ForeColor
[Color](https://docs.microsoft.com/en-us/dotnet/api/system.drawing.color): Returns or sets the text color for the control. (Default: `Color [White]`)
### GidLineSize
[Int32](https://docs.microsoft.com/en-us/dotnet/api/system.int32): Returns or sets the size of the grid lines. (Default: `1`)
### GridLineColor
[Color](https://docs.microsoft.com/en-us/dotnet/api/system.drawing.color): Returns or sets the color of the grid lines. (Default: `Color [White]`)
### Interpolation
[InterpolationType](/extensions/extensions/smoothiechart/api/wisej.web.ext.smoothiechart.interpolationtype.md): Returns or sets the type of interpolation to use when drawing this time series. (Default: `Bezier`)
### MaxValue
[Nullable\](https://docs.microsoft.com/en-us/dotnet/api/system.nullable): Returns or sets the maximum value. Leave null to let the chart dynamically adjust the maximum value. (Default: `null`)
### MinValue
[Nullable\](https://docs.microsoft.com/en-us/dotnet/api/system.nullable): Returns or sets the minimum value. Leave null to let the chart dynamically adjust the minimum value. (Default: `null`)
### ScrollSpeed
[Int32](https://docs.microsoft.com/en-us/dotnet/api/system.int32): ScrollSpeed in milliseconds/pixel. (Default: `20`)
### ShowMinMaxLabels
[Boolean](https://docs.microsoft.com/en-us/dotnet/api/system.boolean): Returns or sets whether the control displays the minimum and maximum labels. (Default: `True`)
### ShowTimeStamps
[Boolean](https://docs.microsoft.com/en-us/dotnet/api/system.boolean): Returns or sets whether the control displays the time stamp labels. (Default: `True`)
### TimeLineSpacing
[Int32](https://docs.microsoft.com/en-us/dotnet/api/system.int32): Returns or sets the distance between the vertical grid lines in milliseconds/line. (Default: `1000`)
### TimeSeries
[TimeSeriesCollection](/extensions/extensions/smoothiechart/api/wisej.web.ext.smoothiechart.timeseriescollection.md): Returns or sets the [TimeSeries](/extensions/extensions/smoothiechart/api/wisej.web.ext.smoothiechart.timeseries.md) lines to display in the chart.
### UpdateDelay
[Int32](https://docs.microsoft.com/en-us/dotnet/api/system.int32): UpdateDelay in milliseconds. It is the time lag between the data received from the server and the screen update. (Default: `1000`)
### VerticalSections
[Int32](https://docs.microsoft.com/en-us/dotnet/api/system.int32): Returns or sets the number of vertical sections marked out by horizontal grid lines. (Default: `2`)
## Methods
### GetData()
Returns the data requested by the widget.
**Returns:** [Object](https://docs.microsoft.com/en-us/dotnet/api/system.object).
### Start()
Starts the data streaming.
### Stop()
Stops the data streaming.
## Events
### DataNeeded
[DataNeededEventHandler](https://docs.wisej.com/api?q=wisej.web.ext.smoothiechart.dataneededeventhandler) Fired when the chart needs a data point.
---
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