portsupdating - Datagridview rowvalidating vs cellvalidating

Programmatic resizing is useful to avoid performance penalties with continuous resizing. When you programmatically resize columns that have Inherited Auto Size Mode property values of Fill, however, the calculated content-based widths are used to proportionally adjust the column Fill Weight property values, and the actually column widths are then calculated according to these new proportions so that all columns fill the available display area of the control.

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This is sometimes called "mixed mode" and is useful for displaying things like calculated values or user-interface (UI) controls. For example, you can use virtual mode to implement a just-in-time data loading mechanism that retrieves only as much data from a networked database as is necessary for optimal performance.

Because unbound columns are outside the data source, they are ignored by the data source's sorting operations. This scenario is particularly useful when working with large amounts of data over a slow network connection or with client machines that have a limited amount of RAM or storage space.

Virtual mode is necessary only when you need to supplement or replace bound mode.

In bound mode, you set the Data Source property and the control automatically loads the data from the specified source and submits user changes back to it.

Enable Resizing; Data Grid View 列宽和行高自动调整的设定: // 设定包括Header和所有单元格的列宽自动调整 Data Grid View1. Selected。 5.5滚动(滚动) Data Grid View中毫无疑问地会提供对水平和垂直滚动条的支持,它同时也支持使用鼠标滚轮进行垂直滚动。水平方向的滚动基于像素值,而垂直方向的滚动则基于行的索引,不支持垂直的Data Grid View方向的基于像素值的滚动。 5.5.1 Scroll事件 当你滚动Data Grid View的引发Scroll事件,让您被通知滚动发生。对滚动事件参数定位属性可以让你知道滚动的方向。 5.5.2滚动条 Data Grid View的滚动条可以访问,它通过保护Horizo??

event, which enables the control look up values in the data cache.

Most sections contain a Q & A section that answers common questions regarding the specific feature or area covered by the section.

Note that some questions are duplicated in multiple sections based upon the section relevancy.

Data Grid View控件 Data Grid View是用于Windows Froms 2.0的新网格控件。它可以取代先前版本中Data Grid控件,它易于使用并高度可定制,支持很多我们的用户需要的特性。 关于本文档: 本文档不准备面面俱到地介绍Data Grid View,而是着眼于深入地介绍一些技术点的高级特性。 本文档按逻辑分为5个章节,首先是结构和特性的概览,其次是内置的列/单元格类型的介绍,再次是数据操作相关的内容,然后是主要特性的综述,最后是最佳实践。 大部分章节含有一个“Q & A”部分,来回答该章节相关的一些常见问题。注意,某些问题会由于知识点的关联性重复出现在多个章节。这些问题、答案及其附带的示例代码都包含在本文档的附录部分。 内容 1 何为Data Grid View.. Excluding rows is useful to avoid a performance penalty when you are working with a large quantity of rows.

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