代码：
            //对每个字段的栏位大小优化
            dataGrid1.TableStyles.Clear();//要先清除之前格式,不然多次讀入數據時有問題
            DataGridTableStyle Datadt = new DataGridTableStyle();
            Datadt.MappingName = ds2.Tables[0].TableName;
            //第零列    以0开始
            DataGridColumnStyle pda_tag = new DataGridTextBoxColumn();
            //DataGridColumnStyle pda_tag = new DataGridCheckBoxColumn();    此样式出错
            //DataGridColumnStyle pda_tag = new DataColumn("pda_tag", typeof(bool)); //DataGridCheckBoxColumn(); 此样式出错
            pda_tag.MappingName = "pda_tag";
            pda_tag.HeaderText = "PDA";
            pda_tag.Width = 28;
            Datadt.GridColumnStyles.Add(pda_tag);

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