webform gridview合并单元格

/// <summary>
/// 合并单元格
/// </summary>
public class MergeCellHelper
{
/// <summary>
/// 合并表头
/// </summary>
/// <param name="row">当前行</param>
/// <param name="startColumn">开始列</param>
/// <param name="endColumn">结束列</param>
public static void MergeHeader(GridViewRow row, int startColumn, int endColumn)
{
for (int i = startColumn; i <= endColumn; i++)
{
if (i != startColumn)
{
row.Cells[i].Visible = false;
continue;
}
row.Cells[startColumn].ColumnSpan = endColumn - startColumn + ;
}
} /// <summary>
/// 合并指定列的行
/// </summary>
/// <param name="gv">gridview</param>
/// <param name="columns">指定的列：可以多列</param>
public static void MergeRow(GridView gv, params int[] columns)
{
MergeRowByReferenceColumn(gv, , columns);
} /// <summary>
/// 合并指定列的行(参考列一定要合理，慎用)
/// </summary>
/// <param name="gv">gridview</param>
/// /// <param name="referenceColumn">参照列</param>
/// <param name="columns">指定的列：可以多列</param>
public static void MergeRowByReferenceColumn(GridView gv, int referenceColumn, params int[] columns)
{
for (int i = ; i < columns.Length; i++)
{
var currentColumn = columns[i];
int rowSpan = ;
for (int j = ; j < gv.Rows.Count; j++)
{
var currentRow = gv.Rows[j];
if (j < gv.Rows.Count - )
{
var nextRow = gv.Rows[j + ];
if (currentRow.Cells[referenceColumn].Text == nextRow.Cells[referenceColumn].Text)
{
if (currentRow.Cells[currentColumn].Text == nextRow.Cells[currentColumn].Text)
{
rowSpan = rowSpan < ? : rowSpan + ;
nextRow.Cells[currentColumn].Visible = false;
}
else
{
gv.Rows[j - rowSpan + ].Cells[currentColumn].RowSpan = rowSpan;
rowSpan = ;
}
}
else
{
gv.Rows[j - rowSpan + ].Cells[currentColumn].RowSpan = rowSpan;
rowSpan = ;
}
}
else
{
gv.Rows[j - rowSpan + ].Cells[currentColumn].RowSpan = rowSpan;
rowSpan = ;
}
}
}
} }