this.dataGridView1.RowsDefaultCellStyle.WrapMode = DataGridViewTriState.True;//换行
this.dataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.AllCells;//自动行高
foreach (DataGridViewColumn c in this.dataGridView1.Columns)
c.AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCellsExceptHeader;//行动列宽
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