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this.dataGridView1.RowHeadersWidth = 100; //自定义
this.dvInfo.AllowUserToResizeColumns = true;
this.dvInfo.Columns[0].Resizable = DataGridViewTriState.True;
this.dvInfo.Columns[0].Width = 100 * 2; //自定义
//this.dvInfo.Columns[0].Resizable = DataGridViewTriState.False;
//this.dvInfo.AllowUserToResizeColumns = false;
this.dataGridView1.Columns[0].Width = 200;