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LegendItem.ToolTip Property

Gets or sets the tooltip of the legend item.

Namespace:  System.Web.UI.DataVisualization.Charting
Assembly:  System.Web.DataVisualization (in System.Web.DataVisualization.dll)

public string ToolTip { get; set; }

Property Value

Type: System.String
A string value that represents the tooltip for the legend item.



If you set the ToolTip property, a client-side image map will automatically be created. A map area will also be created with its Title attribute set to the specified tooltip string. The map area will use the dimensions that correspond to the title. For example, if the ToolTip property is set for a data point, then HTML code similar to the following will be generated at run time:

<MAP NAME="Chart1ImageMap"><AREA SHAPE="rect" Title="First Data Value = 19" COORDS="69,120,106,309"></MAP>

Setting this property will have no effect if the IsMapEnabled property is set to false. The default value is true.

Important   To create an image map in this manner, the RenderType property of the Chart object must be set to ImageTag. It is possible to create an image map when using binary streaming, but another technique must be used. For more information, see Chart Image Rendering (Chart Controls).

This property allows you to set special keywords to display different types of chart-related data. For more information, see Keywords (Chart Controls).

To create image maps that have user-defined coordinates, use the MapAreas property of the root Chart object.


This property is applicable to the entire LegendItem.

.NET Framework

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.