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Automatically equalise datagrid columns

This is one method to resize datagrid columns so that they are all of equal size, and fill up the entire client area of the DataGridView

Submitted By: Nayana

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Views: 4,361

Language: C#

Last Modified: January 20, 2008

Instructions: This function assumes that we have are using the System.Windows.Forms name space.

Just paste into the form of choice, or change it to public and put it somewhere else.

To make use of it, call it from the SizeChanged event on the DataGridView, and whenever changes are made to the number or visibility of columns.

e.g.
private void dgvTest_SizeChanged(object sender, EventArgs e) {
EqualizeColumns(dgvTest);
}

And the columns will be resized whenever the DataGridView is resized. E.g. if it is docked, or anchored to opposite sides, it will resize when it's owner Control is resized.

Snippet

private void EqualizeColumns(DataGridView dgv) {
int n = dgv.Columns.Count; // Number of columns
// Reduce n to number of VISIBLE columns
for(int i = 0; i < dgv.Columns.Count; i++)
if(!dgv.Columns[i].Visible) n--;
/* Resize columns, taking into account the size of the row header, the client area of the
* DataGridView and the size of the scroll bar. I don't know how to check whether or not
* the scroll bar is currently visible. */
for(int i = 1; i < dgv.Columns.Count; i++)
dgv.Columns[i].Width = dgv.Columns[i].Visible
? (dgv.ClientSize.Width - (dgv.RowHeadersVisible ? dgv.RowHeadersWidth : 0)
- SystemInformation.VerticalScrollBarWidth - 2) / n
: 0; /* set invisible columns to 0, so if they are set to visible, they won't be shown unless
* they are explicitly resized. */
}