c# List列表数据转换成树形结构

时间:2021-12-13 07:23:34
把List列表结构 转换成树形结构
 /// <summary>
/// 构造树形Json
/// </summary>
public static class TreeJson
{ /// <summary>
/// 转换树Json
/// </summary>
/// <param name="list">数据源</param>
/// <param name="parentId">父节点</param>
/// <returns></returns>
public static string ZTreeJson(this List<TreeEntity> list, string parentId = null) //GetDepartmentTree等方法会给parentId赋值的是null,所以这里的parentId不能写""
{
StringBuilder strJson = new StringBuilder();
List<TreeEntity> item = list.FindAll(t => t.parentId == parentId);
strJson.Append("[");
if (item.Count > )
{
foreach (TreeEntity entity in item)
{
strJson.Append("{");
strJson.Append("\"id\":\"" + entity.id + "\",");
if (!string.IsNullOrEmpty(entity.text))
{
strJson.Append("\"name\":\"" + entity.text.Replace("&nbsp;", "") + "\",");
}
if (!string.IsNullOrEmpty(entity.Attribute))
{
strJson.Append("\"" + entity.Attribute + "\":\"" + entity.AttributeValue + "\",");
}
if (!string.IsNullOrEmpty(entity.AttributeA))
{
strJson.Append("\"" + entity.AttributeA + "\":\"" + entity.AttributeValueA + "\",");
}
if (!string.IsNullOrEmpty(entity.AttributeB))
{
strJson.Append("\"" + entity.AttributeB + "\":\"" + entity.AttributeValueB + "\",");
}
if (!string.IsNullOrEmpty(entity.AttributeC))
{
strJson.Append("\"" + entity.AttributeC + "\":\"" + entity.AttributeValueC + "\",");
}
if (entity.checkstate != null)
{
strJson.Append("\"checked\":" + entity.checkstate + ",");
}
strJson.Append("\"showcheck\":" + entity.showcheck.ToString().ToLower() + ",");
strJson.Append("\"open\":" + entity.isexpand.ToString().ToLower() + ",");
strJson.Append("\"isParent\":" + entity.hasChildren.ToString().ToLower() + ",");
strJson.Append("\"children\":" + ZTreeJson(list, entity.id) + "");
strJson.Append("},");
}
strJson = strJson.Remove(strJson.Length - , );
}
strJson.Append("]");
return strJson.ToString();
} /// <summary>
/// 转换树Json
/// </summary>
/// <param name="list">数据源</param>
/// <param name="ParentId">父节点</param>
/// <returns></returns>
public static string TreeToJson(this List<TreeEntity> list, string ParentId = null) //GetDepartmentTree等方法会给parentId赋值的是null,所以这里的parentId不能写""
{
StringBuilder strJson = new StringBuilder();
List<TreeEntity> item = list.FindAll(t => t.parentId == ParentId);
strJson.Append("[");
if (item.Count > )
{
foreach (TreeEntity entity in item)
{
strJson.Append("{");
strJson.Append("\"id\":\"" + entity.id + "\",");
if (!string.IsNullOrEmpty(entity.text))
{
strJson.Append("\"text\":\"" + entity.text.Replace("&nbsp;", "") + "\",");
}
if (!string.IsNullOrEmpty(entity.value))
{
strJson.Append("\"value\":\"" + entity.value + "\",");
} if (!string.IsNullOrEmpty(entity.Attribute))
{
strJson.Append("\"" + entity.Attribute + "\":\"" + entity.AttributeValue + "\",");
}
if (!string.IsNullOrEmpty(entity.AttributeA))
{
strJson.Append("\"" + entity.AttributeA + "\":\"" + entity.AttributeValueA + "\",");
}
if (entity.title != null && !string.IsNullOrEmpty(entity.title.Replace("&nbsp;", "")))
{
strJson.Append("\"title\":\"" + entity.title.Replace("&nbsp;", "") + "\",");
}
if (entity.img != null && !string.IsNullOrEmpty(entity.img.Replace("&nbsp;", "")))
{
strJson.Append("\"img\":\"" + entity.img.Replace("&nbsp;", "") + "\",");
}
if (entity.checkstate != null)
{
strJson.Append("\"checkstate\":" + entity.checkstate + ",");
}
//if (entity.parentId != null)
//{
// strJson.Append("\"parentnodes\":\"" + entity.parentId + "\",");
//}
strJson.Append("\"parentnodes\":\"" + entity.parentId + "\",");
if (entity.Level != null)
{
strJson.Append("\"Level\":" + entity.Level + ",");
}
strJson.Append("\"showcheck\":" + entity.showcheck.ToString().ToLower() + ",");
strJson.Append("\"isexpand\":" + entity.isexpand.ToString().ToLower() + ",");
if (entity.complete == true)
{
strJson.Append("\"complete\":" + entity.complete.ToString().ToLower() + ",");
}
strJson.Append("\"hasChildren\":" + entity.hasChildren.ToString().ToLower() + ",");
strJson.Append("\"ChildNodes\":" + TreeToJson(list, entity.id) + "");
strJson.Append("},");
}
strJson = strJson.Remove(strJson.Length - , );
}
strJson.Append("]");
return strJson.ToString();
}
}