//自适应列宽

this.dgvBaoming.AutoSizeColumnsMode = System.Windows.Forms.DataGridViewAutoSizeColumnsMode.AllCells;

 //平铺均分列宽 
this.dgvBaoming.AutoSizeColumnsMode = System.Windows.Forms.DataGridViewAutoSizeColumnsMode.Fills;

C# dataGridView根据数据内容调整列宽