GridView Repeater 合并列

我们通常会遇到GridView Repeater 相邻列，值相同时合并的情况如图

今天把实现方法写一下

思路：因为GridView我们的值我们可以从后台自己获取。所以我们在得到要合并的列时，循环比较行列上下行之间的值，如果相等，改变一行Rowspan值，隐藏行一行

GridView实现：

  /// <summary>

        /// 合并行

        /// </summary>

        /// <param name="gvw"> 需要合并的GridView</param>

        /// <param name="sCol">sCol要合并开始列（从0开始）</param>

        /// <param name="eCol">eCol要合并的结束列</param>

        /// <param name="refCol">refCol以哪一列作为标准</param>

        public static void MergeRows(GridView gvw, int sCol, int eCol, int[] refCol)

        {

            for (int rowIndex = gvw.Rows.Count - 2; rowIndex >= 0; rowIndex--)

            {

               //获取相邻行的值row进行比较

                GridViewRow row = gvw.Rows[rowIndex];

                GridViewRow previousRow = gvw.Rows[rowIndex + 1];

                for (int i = sCol; i < eCol + 1; i++)

                {

                    {

                      //判断是否需要合并

                        bool isSame = true;

                        for (int j = 0; j < refCol.Length; j++)

                        {

                            if (row.Cells[refCol[j]].Text != previousRow.Cells[refCol[j]].Text)

                            {

                                isSame = false;

                                break;

                            }

                        }

                        if (!isSame)

                        {

                            continue;

                        }

                      //修改相邻两行的RowSpan的值

                        row.Cells[i].RowSpan = previousRow.Cells[i].RowSpan < 1 ? 2 : previousRow.Cells[i].RowSpan + 1;

                        previousRow.Cells[i].Visible = false;

                    }

                }

            }

        }

 Repeater 思路，因为repeater 的值后台无法取到，所以每个值所在的td 中设置ID="xxx" runat="server"，来获取前台的值

   页面代码：      

           

                <asp:Repeater ID="rptBillItem" runat="server">
                    <HeaderTemplate>
                        <tr class="datarow">
                            <td>
                                果品等级<br />
                                GRADE
                            </td>
                            <td>
                                单箱重量<br />
                                WEUGHT/CTN
                            </td>
                            <td>
                                规格<br />
                                SIZE
                            </td>
                            <td>
                                箱数<br />
                                QUANTITY
                            </td>
                            <td>
                                用箱种类<br />
                                BRAND
                            </td>
                            <td>
                                备 注<br />
                                REMARK
                            </td>
                        </tr>
                    </HeaderTemplate>
                    <ItemTemplate>
                        <tr class="datarow" >
                            <td runat="server" id="grade">
                                <%#Eval("grade") %>
                            </td>
                            <td runat="server" id="weuqht">
                                <%#Eval("weuqht") %>
                            </td>
                            <td runat="server" id="size">
                               <%#Eval("size") %>
                            </td>
                            <td runat="server" id="quantity">
                                <%#Eval("quantity") %>
                            </td>
                            <td runat="server" id="brand">
                               <%#Eval("brand") %>
                            </td>
                            <td runat="server" id="remark" >
                                <%#Eval("remark") %>
                            </td>
                        </tr>
                    </ItemTemplate>
                </asp:Repeater>

后台方法：

 /// <summary>
        /// 合并行
        /// </summary>
        /// <param name="gvw"> 需要合并的Repeater</param>
        /// <param name="refCol">refCol以哪一列作为标准</param>
        /// <param name="con">要合并的列名ID</param>
        public static void MergeRows(Repeater gvw, string[] refCol, string[] con)
        {
            //循环所以的行
            for (int rowIndex = gvw.Items.Count - 2; rowIndex >= 0; rowIndex--)
            {
                for (int i = 0; i < con.Length; i++)
                {
                    //获得该行上一行的数据
                    HtmlTableCell oCell_previous = gvw.Items[rowIndex].FindControl(con[i]) as HtmlTableCell;
                    HtmlTableCell oCell = gvw.Items[rowIndex + 1].FindControl(con[i]) as HtmlTableCell;
                    oCell.RowSpan = (oCell.RowSpan == -1) ? 1 : oCell.RowSpan;
                    oCell_previous.RowSpan = (oCell_previous.RowSpan == -1) ? 1 : oCell_previous.RowSpan;
                    {
                        bool isSame = true;
                        //循环要合并的列
                        for (int j = 0; j < refCol.Length; j++)
                        {
                            HtmlTableCell refColtilel_previous = gvw.Items[rowIndex].FindControl(refCol[j]) as HtmlTableCell;
                            HtmlTableCell refColtile = gvw.Items[rowIndex + 1].FindControl(refCol[j]) as HtmlTableCell;
                            if (refColtile.InnerText != refColtilel_previous.InnerText)
                            {
                                if (con[i] != "remark")
                                {
                                    isSame = false;
                                    break;
                                }
                            }
                        }
                        if (!isSame)
                        {
                            continue;
                        }
                        //如果两列值相等则合并
                        if (oCell.InnerText == oCell_previous.InnerText)
                        {
                            oCell.Visible = false;
                            oCell_previous.RowSpan += oCell.RowSpan;
                        }
                    }
                }
            }
        }