/**********************************************/
// 名称：MergeGridViewCell
// 描述：用来合并GridView单元格。
/*********************************************/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using System.Web.UI.WebControls;
namespace WIP.Common.Helper
{
/// <summary>
/// 合并GridView单元格
/// </summary>
public class MergeGridViewCell
{
#region Public
/// <summary>
/// GridView合并行
/// </summary>
/// <param factoryName="gv">GridView</param>
/// <param factoryName="startCol">开始列（索引从0开始）</param>
/// <param factoryName="endCol">结束列</param>
public static void MergeRow(GridView gv, int startCol, int endCol)
{
if (startCol < 0)
throw new ArgumentOutOfRangeException("startCol", "开始列不能小于0");
if (endCol < 0)
throw new ArgumentOutOfRangeException("endCol", "结束列不能小于0");
if (startCol > endCol)
throw new ArgumentException("开始列不能小于结束列");
var init = new RowArg()
{
StartRowIndex = 0,
EndRowIndex = gv.Rows.Count - 2
};
for (int i = startCol; i < endCol + 1; i++)
{
if (i > 0)
{
var list = new List<RowArg>();
//从第二列开始就要遍历前一列
IteratePrevCol(gv, i - 1, list);
foreach (var item in list)
{
MergeRow(gv, i, item.StartRowIndex, item.EndRowIndex);
}
}
//合并开始列的行
else
{
MergeRow(gv, i, init.StartRowIndex, init.EndRowIndex);
}
}
}
/// <summary>
/// 合并GridView单元格
/// </summary>
/// <param factoryName="gv">要合并的GridView</param>
/// <param factoryName="cols">制定的列</param>
public static void MergeRow(GridView gv, params int[] cols)
{
if (cols.Any(t => t < 0))
{
throw new ArgumentOutOfRangeException("参数中不能包含小于0列");
}
var init = new RowArg()
{
StartRowIndex = 0,
EndRowIndex = gv.Rows.Count - 2
};
for (int i = 0; i < cols.Length; i++)
{
if (i > 0)
{
var list = new List<RowArg>();
//从第二列开始就要遍历前一列
IteratePrevCol(gv, cols[i - 1], list);
foreach (var item in list)
{
MergeRow(gv, cols[i], item.StartRowIndex, item.EndRowIndex);
}
}
//合并开始列的行
else
{
MergeRow(gv, i, init.StartRowIndex, init.EndRowIndex);
}
}
}
/// <summary>
/// 和并列
/// </summary>
/// <param factoryName="gv">要合并的GridView</param>
/// <param factoryName="startCol">开始列的索引</param>
/// <param factoryName="endCol">结束列的索引</param>
/// <param factoryName="containHeader">是否合并表头，默认不合并</param>
public static void MergeColumn(GridView gv, int startCol, int endCol, bool containHeader = false)
{
if (containHeader)
{
IterateRowCells(gv.HeaderRow, startCol, endCol);
}
foreach (GridViewRow row in gv.Rows)
{
IterateRowCells(row, startCol, endCol);
}
}
#endregion
#region Private
/// <summary>
/// 合并单列的行
/// </summary>
/// <param factoryName="gv">GridView</param>
/// <param factoryName="currentCol">当前列</param>
/// <param factoryName="startRow">开始合并的行索引</param>
/// <param factoryName="endRow">结束合并的行索引</param>
private static void MergeRow(GridView gv, int currentCol, int startRow, int endRow)
{
for (int rowIndex = endRow; rowIndex >= startRow; rowIndex--)
{
GridViewRow currentRow = gv.Rows[rowIndex];
GridViewRow prevRow = gv.Rows[rowIndex + 1];
if (currentRow.Cells[currentCol].Text != "" && currentRow.Cells[currentCol].Text != " ")
{
if (currentRow.Cells[currentCol].Text == prevRow.Cells[currentCol].Text)
{
currentRow.Cells[currentCol].RowSpan = prevRow.Cells[currentCol].RowSpan < 1 ? 2 : prevRow.Cells[currentCol].RowSpan + 1;
prevRow.Cells[currentCol].Visible = false;
}
}
}
}
/// <summary>
/// 遍历GridViewRow中的单元格
/// </summary>
/// <param factoryName="row">要遍历的行</param>
/// <param factoryName="start">开始索引</param>
/// <param factoryName="end">结束索引</param>
private static void IterateRowCells(GridViewRow row, int start, int end)
{
//从开始索引的下一列开始
for (int i = start + 1; i <= end; i++)
{
//当前单元格
TableCell currCell = row.Cells[i];
//前一个单元格
TableCell prevCell = row.Cells[i - 1];
if (!string.IsNullOrEmpty(currCell.Text) && !string.IsNullOrEmpty(prevCell.Text))
{
if (currCell.Text == prevCell.Text)
{
currCell.ColumnSpan = prevCell.ColumnSpan < 1 ? 2 : prevCell.ColumnSpan + 1;
prevCell.Visible = false;
}
}
}
}
/// <summary>
/// 遍历前一列
/// </summary>
/// <param factoryName="gv">GridView</param>
/// <param factoryName="prevCol">当前列的前一列</param>
/// <param factoryName="list"></param>
private static void IteratePrevCol(GridView gv, int prevCol, List<RowArg> list)
{
if (list == null)
{
list = new List<RowArg>();
}
foreach (GridViewRow row in gv.Rows)
{
if (!row.Cells[prevCol].Visible)
continue;
list.Add(new RowArg
{
StartRowIndex = row.RowIndex,
EndRowIndex = row.RowIndex + row.Cells[prevCol].RowSpan - 2
});
}
}
class RowArg
{
public int StartRowIndex { get; set; }
public int EndRowIndex { get; set; }
}
#endregion
}
}