Datagridview group rows code#
Datagridview group rows free#

Vertical cell merging instead of row grouping And one more bad thing regarding drawing: you can notice some glitches when drawing the cell contents, especially in the last row.

To overcome this, you should modify the original source code. They are drawn using the whole width of the grid, even if the total width of all columns is less than the width of the control. The drawing of group rows in this DataGridView grouping is odd a little bit. Another significant restriction is the ability to group the grid only by the values from one column. it should display data from a data source specified in the DataSource property. The main of them is that the target DataGridView control should be data-bound, i.e. This grouping approach is good but has some serious restrictions though. They are used to draw the contents of group rows inside the target DataGridView.

The idea of the DataGridView grouping functionality implemented in the class is based on the RowPrePaint/ RowPostPaint events of the DataGridView control. It also triggers useful events like GroupingChanged or DisplayGroup so you can be notified about what's happening and even enhance the contents of group rows in your DataGridView using C# or VB.NET. If the class is compiled as a component and added to a VB.NET or C# project, you drop it on a form and link to the target DataGridView using the property of the same name.ĭataGridViewGrouper provides you with some settings you can use to adjust the DataGridView grouping process. From code, you just need two lines like the following ones to attach the class to a DataGridView and group it by the specified column: var grouper = new DataGridViewGrouper(dataGridView1) Here is an example of how it looks if we attach the component to a WinForms DataGridView with some test data:Īs you can see from the picture, this helper class automatically adds group rows to a DataGridView, and the user can even collapse/expand them using the plus-minus buttons inside group rows. The DataGridViewGrouper component can be compiled as a standalone assembly to implement DataGridView grouping in C# and VB.NET or any other popular. This component is a class that can be attached to a DataGridView in any existing form to add the grouping functionality to DataGridView.

Datagridview group rows free#

If you search the Internet using a query like winforms datagridview grouping, most likely, you will find the following free open-source project in the top search results: DataGridViewGrouper. DataGridViewGrouper component: adding group rows to WinForms DataGridView At the end of this article you will also find a brief description of the grouping functionality in our DataGridView-like control named iGrid.NET.

Datagridview group rows code#

We analyzed existing source code solutions of this problem and place our overview of two of them below.

NET Framework does not give the developers any native ability to create group rows in WinForms DataGridView. The popularity of this topic is due to the fact that the. DataGridView Grouping in C#/VB.NET: Two Recipesīy Igor Katenov, the lead developer at 10TecĭataGridView grouping is a very popular topic on many forums and websites dedicated to WinForms controls.