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DATAGRIDVIEW GROUP ROWS CODE

It's important to mention that if a suppress group is defined, no other group may be created.

The last sample will create a suppress group.

DATAGRIDVIEW GROUP ROWS CODE

The repeating values are suppressed, and a summary operation is performed on the other columns.īelow we can see the code and the grid appearance for the composite group: The second defines a suppress group, that has the same behavior of the sql GROUP BY clause. With a few more lines of code we can improve the visual aspect of the grid: If the summary is automatic the event occurs after the summary row be added and after the summary values be placed in the row. Occurs after the general summaries be calculated. The event is not triggered if the group is not automatic, but will be triggered if the group is a suppression group (will be seen later on). Occurs when the summary row is generated for the group. The event is not triggered if the group is not automatic. Occurs when an automatic header row is added for the group. Occurs when a new group starts, it means, when new values are found in the group column. GridViewHelper has events to allow easy implementation of visual or functional adjusts.

Visualization is compromised when there is more than one group. In this example, rows which belong to a group are joined visually using cells merged vertically - instead of using classical horizontal group rows. It's possible to create more than one group in the grid, simulating a hierarchical grouping, as seen below: You could try using the functionality of MSFlexGrid's MergeCells property of vertical cell merging instead of row grouping as explained in this article DataGridView Grouping in C/VB.NET: Two Recipes. We need just one more line to register the summary to the group: Let's make something more interesting, let's add a summary to the created group. In case of group summaries, generation of all cells or only the needed cells is a group attribute. Using the footer, all the cells are created. When a new row is added to the grid, only the required cells to display the summarized columns are created. Another option is to use the footer row to display the summary instead of creating a new one. In this sample a new line was added to display the summary.

You can freely customize the style and add as many group headers as you want.To create a summary for the ItemTotal column we need only the promised 2 lines of code:.

Addresses this "disappearing" header problem upon scrolling horizontally.

Those examples are good BUT it doesn't give you the flexibility of adding more columns under specific "GROUP HEADERS".įurthermore, all those examples exhibit this weird scrolling problem where the painted new header disappears if the default child column disappears from the horizontal scrolling view:

Adds datacolumns having same names, and then merge those columns having similar names or,.

I needed to add customizable "group headers" that spans above their "child" column headers, as well as having the flexibility to add more child or group columns. I have searched online for a solution to create dual or multiple headers for the DataGridView control and so far, they don't suit my requirements. DataGridView (Dual Headers) - Creating Group HeadersĬreate Dual Headers or Group Headers in your DataGridView control