/// <summary>
/// 根据节点信息构造表格的头部，并返回数据绑定列
/// </summary>
/// <param name="rootNode"></param>
/// <param name="IsTrue"></param>
/// <param name="condition"></param>
/// <param name="dataColumns"></param>
/// <returns></returns>
public static string BuildTableHead(ColumnNode rootNode, IsTrueHandler IsTrue, NodeCondition condition, out List <ColumnNode> dataColumns)
{
//遍历模板树，构造一棵符合条件的树，用于生成表
TraversalTree(rootNode, IsTrue, condition);
//根据树得到头部列表
List <List <ColumnNode> > headRows = new List <List <ColumnNode> >();
dataColumns = new List <ColumnNode>();
ConvertTreeToList(rootNode, headRows, dataColumns);
StringBuilder htmlBuilder = new StringBuilder();
htmlBuilder.Append("<thead>");
for (int i = 1; i < headRows.Count; i++)
{
htmlBuilder.Append("<tr style=\"text-align:center;\">");
for (int j = 0; j < headRows[i].Count; j++)
{
//如果没有子节点，行数=总行数-当前的层级
int rowSpan = headRows[i][j].Children.Count == 0 ? headRows.Count - headRows[i][j].Level : 1;
htmlBuilder.AppendFormat("<th colspan=\"{0}\" rowspan=\"{1}\">{2}</th>", headRows[i][j].ColSpan, rowSpan, headRows[i][j].Title);
}
htmlBuilder.Append("</tr>");
}
htmlBuilder.Append("</thead>");
return(htmlBuilder.ToString());
}
/// <summary>
/// 遍历树
/// </summary>
/// <param name="rootNode"></param>
/// <param name="IsTrue"></param>
/// <param name="condition"></param>
public static void TraversalTree(ColumnNode rootNode, IsTrueHandler IsTrue, NodeCondition condition)
{
rootNode.Children = new List <object>();
foreach (XmlNode node in rootNode.CorrespondXmlNode.ChildNodes)
{
if (IsTrue(condition, node))
{
rootNode.Children.Add(
new ColumnNode
{
CorrespondXmlNode = node,
Title = node.Attributes["title"].Value,
Name = node.Attributes["name"].Value,
Level = rootNode.Level + 1
});
}
}
foreach (object node in rootNode.Children)
{
TraversalTree((ColumnNode)node, IsTrue, condition);
}
//如果只有一个子节点，则去除该节点，去除节点的子节点上移
if (rootNode.Children.Count == 1)
{
rootNode.Children = ((ColumnNode)rootNode.Children[0]).Children;
foreach (object node in rootNode.Children)
{
((ColumnNode)node).Level = rootNode.Level + 1;
TraversalTree((ColumnNode)node, IsTrue, condition);
}
}
foreach (object node in rootNode.Children)
{
rootNode.ColSpan += ((ColumnNode)node).ColSpan;
}
rootNode.ColSpan = rootNode.ColSpan == 0 ? 1 : rootNode.ColSpan;
}