blazor-devexpress-dot-blazor-dot-charttooltipshowingeventargs.md
Returns information about the tooltip that is about to appear.
Namespace : DevExpress.Blazor
Assembly : DevExpress.Blazor.v25.2.dll
NuGet Package : DevExpress.Blazor
public ChartTooltipData TooltipInfo { get; }
| Type | Description |
|---|---|
| ChartTooltipData |
An object that stores information about a tooltip.
|
The following code snippet disables tooltips for series points that correspond to the specified series:
<DxChart Data="@SalesData"
TooltipShowing="@OnTooltipShowing">
<DxChartLineSeries Name="2017"
Filter="@((SaleInfo s) => s.Date.Year == 2017)"
ArgumentField="@(s => s.City)"
ValueField="@(s => s.Amount)"
SummaryMethod="Enumerable.Sum" />
<DxChartLineSeries Name="2018"
Filter="@((SaleInfo s) => s.Date.Year == 2018)"
ArgumentField="@(s => s.City)"
ValueField="@(s => s.Amount)"
SummaryMethod="Enumerable.Sum" />
<DxChartLegend AllowToggleSeries="true"
Orientation="Orientation.Vertical"
Position="RelativePosition.Outside"
HorizontalAlignment="HorizontalAlignment.Right">
<DxChartTitle Text="Years" />
</DxChartLegend>
<DxChartTooltip Enabled="true" />
</DxChart>
@code {
void OnTooltipShowing(ChartTooltipShowingEventArgs e) {
if (e.TooltipInfo.Series.Name == "2017")
e.Cancel = true;
}
IEnumerable<SaleInfo> SalesData;
protected override async Task OnInitializedAsync() {
SalesData = await Sales.GetSalesAsync();
}
}
public class Sales {
static IList<SaleInfo> dataSource;
public class SaleInfo {
public int OrderId { get; set; }
public string Region { get; set; }
public string Country { get; set; }
public string City { get; set; }
public int Amount { get; set; }
public DateTime Date { get; set; }
}
static Sales() {
CreateDataSource();
}
public static Task<IQueryable<SaleInfo>> GetSalesAsync() {
return Task.FromResult(dataSource.AsQueryable());
}
static void CreateDataSource() {
dataSource = new List<SaleInfo> {
new SaleInfo {
OrderId = 10248,
Region = "North America",
Country = "United States",
City = "New York",
Amount = 1740,
Date = DateTime.Parse("2017/01/06")
},
new SaleInfo {
OrderId = 10249,
Region = "North America",
Country = "United States",
City = "Los Angeles",
Amount = 850,
Date = DateTime.Parse("2017/01/13")
},
new SaleInfo {
OrderId = 10250,
Region = "North America",
Country = "United States",
City = "Denver",
Amount = 2235,
Date = DateTime.Parse("2017/01/07")
},
new SaleInfo {
OrderId = 10251,
Region = "North America",
Country = "Canada",
City = "Vancouver",
Amount = 1965,
Date = DateTime.Parse("2017/01/03")
},
new SaleInfo {
OrderId = 10252,
Region = "North America",
Country = "Canada",
City = "Edmonton",
Amount = 880,
Date = DateTime.Parse("2017/01/10")
},
new SaleInfo {
OrderId = 10253,
Region = "South America",
Country = "Brazil",
City = "Rio de Janeiro",
Amount = 5260,
Date = DateTime.Parse("2017/01/17")
},
new SaleInfo {
OrderId = 10254,
Region = "South America",
Country = "Argentina",
City = "Buenos Aires",
Amount = 2790,
Date = DateTime.Parse("2017/01/21")
},
new SaleInfo {
OrderId = 10255,
Region = "South America",
Country = "Paraguay",
City = "Asuncion",
Amount = 3140,
Date = DateTime.Parse("2017/01/01")
},
new SaleInfo {
OrderId = 10256,
Region = "Europe",
Country = "United Kingdom",
City = "London",
Amount = 6175,
Date = DateTime.Parse("2017/01/24")
},
new SaleInfo {
OrderId = 10257,
Region = "Europe",
Country = "Germany",
City = "Berlin",
Amount = 4575,
Date = DateTime.Parse("2017/01/11")
},
new SaleInfo {
OrderId = 10517,
Region = "North America",
Country = "United States",
City = "New York",
Amount = 7710,
Date = DateTime.Parse("2018/01/18")
},
new SaleInfo {
OrderId = 10518,
Region = "North America",
Country = "United States",
City = "Los Angeles",
Amount = 7975,
Date = DateTime.Parse("2018/01/10")
},
new SaleInfo {
OrderId = 10519,
Region = "North America",
Country = "United States",
City = "Denver",
Amount = 3285,
Date = DateTime.Parse("2018/01/13")
},
new SaleInfo {
OrderId = 10520,
Region = "North America",
Country = "Canada",
City = "Vancouver",
Amount = 2580,
Date = DateTime.Parse("2018/01/22")
},
new SaleInfo {
OrderId = 10521,
Region = "North America",
Country = "Canada",
City = "Edmonton",
Amount = 2160,
Date = DateTime.Parse("2018/01/26")
},
new SaleInfo {
OrderId = 10522,
Region = "South America",
Country = "Brazil",
City = "Rio de Janeiro",
Amount = 1100,
Date = DateTime.Parse("2018/01/25")
},
new SaleInfo {
OrderId = 10523,
Region = "South America",
Country = "Argentina",
City = "Buenos Aires",
Amount = 4425,
Date = DateTime.Parse("2018/01/21")
},
new SaleInfo {
OrderId = 10524,
Region = "South America",
Country = "Paraguay",
City = "Asuncion",
Amount = 1360,
Date = DateTime.Parse("2018/01/22")
},
new SaleInfo {
OrderId = 10525,
Region = "Europe",
Country = "United Kingdom",
City = "London",
Amount = 3250,
Date = DateTime.Parse("2018/01/14")
},
new SaleInfo {
OrderId = 10526,
Region = "Europe",
Country = "Germany",
City = "Berlin",
Amount = 5550,
Date = DateTime.Parse("2018/01/21")
},
};
}
}
See Also
ChartTooltipShowingEventArgs Class