gridView1.OptionsView.ColumnAutoWidth = false;
for (int I = 0; I < gridView1.Columns.Count; I++){this.gridView1.BestFitColumns();this.gridView1.Columns[I].BestFit();//自动列宽}[转]DevExpress.XtraGrid.GridControl gridView自动列宽代码
原文：http://www.cnblogs.com/lzh_527/p/5782507.html