Winforms Interface Development DevExpress v19.2: Map, Pivot Grid and other enhancements

DevExpress Winforms Controls built more than 140 UI controls and libraries, build perfect and smooth, beautiful and easy to use application. Whether it is Office-style interface, or analyze business data processing in large quantities, DevExpress WinForms can easily do the job! DevExpress Winforms v19.2日前正式发布啦! The new release enhances Map, Pivot Grid and the Range control functions, immediately download experience welcome oh!

DevExpress Winforms v19.2 full version download

Map

FIG thermodynamic data provider

v19.2 includes a new mapping visualization options - Thermal FIG. To create a heat map, please use the link to the geographical location data (latitude and longitude) of new data provider (HeatmapProvider), and use ChoroplethColorizer defined heatmap colors architecture.

You can also change the following heatmap options: color gradient, opacity and radius of data points.

Memory image collage Provider

ImageTileDataProvider allows you to display custom slice image, without the need to save it locally. You almost can load image tiles created at runtime from any source, do this to create a bitmap index based on each tile.

ColorScaleLegend gradient mode

This release includes a new EnableGradientScale property, set this property to true and create a gradient blend between the color legend item.

Pivot Grid

Any level of aggregation

This release includes the Pivot Grid computing engine optimized for WinForms, WPF and ASP.NET, this new engine provides a summary of the more general expression functions, the scope of this function is unbound field. Aggr function using a specific function summary summary data for a specific set of dimensions, you can (you can easily create the desired level of aggregation in the Pivot Grid Control) required nested Aggr function.

Aggr function has the following syntax: Aggr (summaryExpression, dimension1, dimension2, ...)

第一个参数是针对数据源字段计算的摘要表达式，紧随其后的是一组维，这些维的值被分组来计算第一个参数的汇总。

Window计算

现在，您可以指定以下window计算选项：

Running Totals
Moving Calculation
Rank
Difference
Percent Of Total
Custom Window Expression

新对象模型包括以下类：

RunningTotalBinding
MovingCalculationBinding
RankBinding
DifferenceBinding
PercentOfTotalBinding
WindowExpressionBinding

当新的优化计算引擎被激活时，这些增强功能才可用。

客户端模式下的直接数据访问

数据引擎将数据加载到本地内存中，该本地存储针对使用类型化数据集的频繁计算进行了优化，并保证了数据完整性。一些大的数据集，但是可能需要太大的内存空间（可反过来降低应用程序）。

在此版本中，添加DirectDataAccessInClientMode选项。启用DirectDataAccessInClientMode选项后，计算引擎不会将源数据上传到临时存储中，这样可以避免在处理大量数据时（以及不必要进行频繁的重新计算时）客户端模式下的性能下降。

如果在传统模式下使用PivotGrid，则不能使用此选项。

MRU过滤器列表

WinForms Pivot Grid的过滤器面板包含一个下拉列表，该列表显示最近应用于透视数据的过滤器。要显示最近使用的过滤器，请单击MRU过滤器按钮或单击过滤条件。

Range Control

Range Control的日期时间范围客户端

全新的Date-Time Range客户端允许您可以在WinForms Range Control中可视化并选择日期时间间隔，新客户端支持多个标尺、外观自定义选项，并提供自定义绘制事件。

To be used in the design of Date-Time Client, please call the Add Date-Time Client Smart Tags command, use RangeControl.Client property to specify the client at runtime.