DataGridView 添加统计行

文章有点潦草，不过应该看的懂，，，，

2种方式：

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方式一：（数据直接绑定）

缺点：列值运输的值  直接写死的，如果需要添加写列值，完全需要重写绑定下，就这点有些不好，暂时也就这样弄了；
这个希望多交流交流，，，

列头排序

添加两个事件，点击列头排序

定义集合 记录排序数

 private List<object[]> list_obj = new List<object[]>();

  //点击排序
        private void dgvSubbill_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            if (e.RowIndex >= 0 || this.dgvSubbill.Rows.Count == 0)
                return;
            if (list_obj.Count == 0)
            {
                colindex = e.ColumnIndex;
                int RowIndex = this.dgvSubbill.Rows.Count - 1;
                list_obj.Add(((DataTable)dgvSubbill.DataSource).Rows[RowIndex].ItemArray);
                this.dgvSubbill.Rows.Remove(dgvSubbill.Rows[this.dgvSubbill.Rows.Count - 1]); //移除
            }
        }
        //排序后
        string direction = "DESC";
        private void dgvSubbill_Sorted(object sender, EventArgs e)
        {
            if (list_obj.Count == 0)
                return;
            if (this.dgvSubbill.Rows.Count > 0)
            {
                DataTable dt = ((DataTable)dgvSubbill.DataSource);
                DataView View = dt.DefaultView;
                if (direction == "ASC")
                {
                    View.Sort = dt.Columns[colindex].ColumnName; //ASC DESC  默认升序
                    direction = "DESC";
                }
                else
                {
                    View.Sort = dt.Columns[colindex].ColumnName + " " + "" + direction + ""; //DESC 降序
                    direction = "ASC";
                }

                dt = View.ToTable();
                dt.Rows.Add(list_obj[0]);
                list_obj.Clear();
                dgvSubbill.DataSource = dt;
                this.dgvSubbill.Rows[this.dgvSubbill.Rows.Count - 1].DefaultCellStyle.BackColor = Color.Cyan;
            }
        }

统计行：

dgvSubbill.DataSource = dtSubbill; //数据绑定

if (this.dgvSubbill.Rows.Count > 0)
    {

 for (int i = 0; i < this.dgvSubbill.Rows.Count; i++)
                {

//运算 列值……

}

}

  //添加合计行(追加绑定行)
int RowIndex = this.dgvSubbill.Rows.Count;
DataRow dr = ((DataTable)dgvSubbill.DataSource).NewRow();

dr[0] = ""; dr[7] = ""; dr[8] = ""; dr[9] = "";

………………

………………

  ((DataTable)dgvSubbill.DataSource).Rows.Add(dr);
this.dgvSubbill.Rows[RowIndex].DefaultCellStyle.BackColor = Color.Cyan;  //合计行颜色 

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 方式二：

手动绑定

 private List<DataGridViewRow> list_row = new List<DataGridViewRow>();

  //合计行
                DataGridViewRow dgv_row = new DataGridViewRow();
                object[] objs = { "合计", "", "", dgv_TotalCharge, dgv_CostPackingList, dgv_TransportCost,""};

　　　　　　dgv_row.CreateCells(this.dgvbsn_Subbill, objs);
                dgv_row.DefaultCellStyle.BackColor = Color.Cyan;
                dgvbsn_Subbill.Rows.Add(dgv_row);

  //排序后发生
        private void dgvbsn_Subbill_Sorted(object sender, EventArgs e)
        {
            if (this.dgvbsn_Subbill.Rows.Count > 0)
            {
                this.dgvbsn_Subbill.Rows.Add(list_row[0]);
                this.list_row.Clear();
            }
        }
        //用户点击时发生
        private void dgvbsn_Subbill_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            if (e.RowIndex >= 0 || this.dgvbsn_Subbill.Rows.Count == 0)
                return;
            if (list_row.Count <= 0)
            {
                int RowIndex = this.dgvbsn_Subbill.Rows.Count - 1;
                list_row.Add(this.dgvbsn_Subbill.Rows[RowIndex]);
                this.dgvbsn_Subbill.Rows.RemoveAt(RowIndex);
            }
        }

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  //其他操作选择统计行之后的阻止（或 批量处理）　　　　　int RowIndex = dgvSubbill.Rows.Count - 2;
                int RowsCount = this.dgvSubbill.SelectedRows[0].Index - 1;
                if (RowsCount == RowIndex)
                    return;