How can I drag the column width of a DataGridView on the designer page when using a custom designer with DesignSurface in a Windows Forms application?

Question

I am currently using DesignSurface to create a custom designer. I want to enable dragging the column widths of a DataGridView on the designer page and record the changes, similar to how it works at runtime. How can I achieve this?

I used IDesignerHost to create a root component for the designer. I created the DataGridView using the approach:

IComponent newComp = host.CreateComponent(typeof(TControl));

Now I want to enable dragging column widths on the designer page.

Alparslan ŞEN · Accepted Answer · 2025-09-18 21:30:25Z

1

Enable the AllowUserToResizeColumns property. Normally, to allow resizing columns in a DataGridView by dragging, you need to set:

dataGridView.AllowUserToResizeColumns = true;

This property must also be enabled when working inside the designer, otherwise the user will not be able to drag and resize the columns on the design surface

answered Sep 18 at 21:30

Alparslan ŞEN

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