Hi Manuel,
Thank you for your interest in Syncfusion Products.
The column with can be set using the Width property referred from the GridColumnDescriptor collections. Refer any one of the way to set the Width for the Grid columns.
[ASPX]
[C#]
//To set the width uniformly for all the columns.
foreach (GridColumnDescriptor gcd in this.GridGroupingControl1.TableDescriptor.Columns)
{
gcd.Width = 90;
}
//To set it for individual columns.
this.GridGroupingControl1.TableDescriptor.Columns[0].Width = 50;
this.GridGroupingControl1.TableDescriptor.Columns[1].Width = 50;
Please let me know if these snippets helps you out.
Thanks,
Rekha