DevExpress中TreeList的一個節點改變父節點也要改變的例項
阿新 • • 發佈：2019-01-09
最近需要做一個功能：在treelist上進行操作，一旦某個列的值進行了改變，那麼它的父節點的值也需要跟著改變，同時要將其改變的值儲存到資料庫。
思路是先得到值改變的那個節點，並迴圈找到父節點，在這同時，需要一個儲存節點值得類，把每一個節點的每個屬性儲存到該類的物件中，並使用一個List將其放到列表中，這樣這個List中就可以儲存那個節點和其父節點一直往上的父節點。在將資料儲存到類的物件中時，這時可直接改變樹上的某個節點的值，這樣，既改變了顯示的值，又可以使用List將改變的值寫進資料庫。
下面是程式碼：
class InspectionValuation { private int _inspectionValuationID; private int _prjDownListID; private string _prjLwfbID; private string _rowType; private string _prjNodeID; private string _teamID; private string _prjParentNodeID; private string _materialNodeID; private string _unit; private double _contactAmount; private double _price; private double _contactValence; private double _thisMonthAcount; private double _thisMonthValence; private double _thisYearAcount; private double _thisYearValence; private double _fromBeginAcount; private double _fromBeginValence; private double _surplusAcount; private double _surplusValence; private int _month; private int _year; private string _isEndMonth; #region 費用清單驗工計價編號 public int InspectionValuationID { get { return _inspectionValuationID; } set { _inspectionValuationID = value; } } #endregion #region 專案編號 public int PrjDownListID { get { return _prjDownListID; } set { _prjDownListID = value; } } #endregion #region 本月數量 public double ThisMonthAcount { get { return _thisMonthAcount; } set { _thisMonthAcount = value; } } #endregion #region 對下專案編號 public string PrjLwfbID { get { return _prjLwfbID; } set { _prjLwfbID = value; } } #endregion #region 驗工計價行分類 public string RowType { get { return _rowType; } set { _rowType = value; } } #endregion #region 節點編碼 public string PrjNodeID { get { return _prjNodeID; } set { _prjNodeID = value; } } #endregion #region 施工隊編號 public string TeamID { get { return _teamID; } set { _teamID = value; } } #endregion #region 父節點編碼 public string PrjParentNodeID { get { return _prjParentNodeID; } set { _prjParentNodeID = value; } } #endregion #region 專案名稱 public string MaterialName { get { return _materialNodeID; } set { _materialNodeID = value; } } #endregion #region 合同單位 public string Unit { get { return _unit; } set { _unit = value; } } #endregion #region 合同數量 public double ContactAmount { get { return _contactAmount; } set { _contactAmount = value; } } #endregion #region 合同單價 public double Price { get { return _price; } set { _price = value; } } #endregion #region 合同金額 public double ContactValence { get { return _contactValence; } set { _contactValence = value; } } #endregion #region 本月合價 public double ThisMonthValence { get { return _thisMonthValence; } set { _thisMonthValence = value; } } #endregion #region 本年數量 public double ThisYearAcount { get { return _thisYearAcount; } set { _thisYearAcount = value; } } #endregion #region 本年合價 public double ThisYearValence { get { return _thisYearValence; } set { _thisYearValence = value; } } #endregion #region 開累計價數量 public double FromBeginAcount { get { return _fromBeginAcount; } set { _fromBeginAcount = value; } } #endregion #region 開累合計 public double FromBeginValence { get { return _fromBeginValence; } set { _fromBeginValence = value; } } #endregion #region 剩餘數量 public double SurplusAcount { get { return _surplusAcount; } set { _surplusAcount = value; } } #endregion #region 剩餘合價 public double SurplusValence { get { return _surplusValence; } set { _surplusValence = value; } } #endregion #region 月 public int Month { get { return _month; } set { _month = value; } } #endregion #region 年 public int Year { get { return _year; } set { _year = value; } } #endregion #region 是否月末次計價 public string IsEndMonth { get { return _isEndMonth; } set { _isEndMonth = value; } } #endregion }
下面的程式碼是：當某個單元格的值發生改變時，獲取它之前的值：
private void treeYgjj_CellValueChanging(object sender, DevExpress.XtraTreeList.CellValueChangedEventArgs e) { if (e.Column.Name == "thisMonthAcount") { try { iOldValue = Convert.ToDouble(e.Node[thisMonthAcount]); } catch (Exception ex) { iOldValue = 0; } } }
下面程式碼是：當某個單元格的值發生改變後，觸發的事件
下面的程式碼是實現SetCheckedParentNodes，找尋其父節點並將值改變，並且儲存進List中，寫入資料庫private void treeYgjj_CellValueChanged(object sender, DevExpress.XtraTreeList.CellValueChangedEventArgs e) { if (e.Column.Name == "thisMonthAcount") { try { e.Node[thisMonthValence] = (Convert.ToDouble(e.Value) * Convert.ToDouble(e.Node[contactValence])).ToString(); double iChangedValue = Convert.ToDouble(e.Value) - iOldValue; if (e.Node.ParentNode != null) { SetCheckedParentNodes(e.Node, iChangedValue); } } catch (Exception ex) { e.Node[thisMonthValence] = 0; } } }
private void SetCheckedParentNodes(TreeListNode node, double dataChangeCount)
{
FindParentNode(node,dataChangeCount);
SaveChangedDataToDB(listNodeAndParentNode);
}
/// <summary>
/// 儲存修改的節點回資料庫
/// </summary>
/// <param name="listNodeAndParentNode"></param>
private void SaveChangedDataToDB(List<InspectionValuation> listNodeAndParentNode)
{
DataTable Dt = new DataTable();
#region 為DataTable新增列
Dt.Columns.Add(new DataColumn("inspectionValuationID", typeof(int)));
Dt.Columns.Add(new DataColumn("prjDownListID", typeof(int)));
Dt.Columns.Add(new DataColumn("prjLwfbID", typeof(string)));
Dt.Columns.Add(new DataColumn("rowType", typeof(string)));
Dt.Columns.Add(new DataColumn("prjNodeID", typeof(string)));
Dt.Columns.Add(new DataColumn("teamID", typeof(string)));
Dt.Columns.Add(new DataColumn("prjParentNodeID", typeof(string)));
Dt.Columns.Add(new DataColumn("materialName", typeof(string)));
Dt.Columns.Add(new DataColumn("unit", typeof(string)));
Dt.Columns.Add(new DataColumn("contactAmount", typeof(Double)));
Dt.Columns.Add(new DataColumn("price", typeof(Double)));
Dt.Columns.Add(new DataColumn("contactValence", typeof(Double)));
Dt.Columns.Add(new DataColumn("thisMonthAcount", typeof(Double)));
Dt.Columns.Add(new DataColumn("thisMonthValence", typeof(Double)));
Dt.Columns.Add(new DataColumn("thisYearAcount", typeof(Double)));
Dt.Columns.Add(new DataColumn("thisYearValence", typeof(Double)));
Dt.Columns.Add(new DataColumn("fromBeginAcount", typeof(Double)));
Dt.Columns.Add(new DataColumn("fromBeginValence", typeof(Double)));
Dt.Columns.Add(new DataColumn("surplusAcount", typeof(Double)));
Dt.Columns.Add(new DataColumn("surplusValence", typeof(Double)));
Dt.Columns.Add(new DataColumn("month", typeof(int)));
Dt.Columns.Add(new DataColumn("year", typeof(int)));
Dt.Columns.Add(new DataColumn("IsEndMonth", typeof(string)));
#endregion
//遍歷listNodeAndParentNode將修改過的節點的值儲存回資料庫
for (int i = 0; i < listNodeAndParentNode.Count; i++)
{
tblInspectionValuation tiv = new tblInspectionValuation();
DataRow dr = dt.NewRow();
#region 為DataRow賦值
dr["inspectionValuationID"] = int.Parse(listNodeAndParentNode[i].InspectionValuationID.ToString());
dr["prjDownListID"] = int.Parse(listNodeAndParentNode[i].PrjDownListID.ToString());
dr["prjLwfbID"] = listNodeAndParentNode[i].PrjLwfbID;
dr["rowType"] = listNodeAndParentNode[i].RowType;
dr["prjNodeID"] = listNodeAndParentNode[i].PrjNodeID;
dr["teamID"] = listNodeAndParentNode[i].TeamID;
dr["prjParentNodeID"] = listNodeAndParentNode[i].PrjParentNodeID;
dr["materialName"] = listNodeAndParentNode[i].MaterialName;
dr["unit"] = listNodeAndParentNode[i].Unit;
dr["contactAmount"] = Convert.ToDouble( listNodeAndParentNode[i].ContactAmount );
dr["price"] = Convert.ToDouble(listNodeAndParentNode[i].Price);
dr["contactValence"] = Convert.ToDouble(listNodeAndParentNode[i].ContactValence);
dr["thisMonthAcount"] = Convert.ToDouble(listNodeAndParentNode[i].ThisMonthAcount);
dr["thisMonthValence"] = Convert.ToDouble(listNodeAndParentNode[i].ThisMonthValence);
dr["thisYearAcount"] = Convert.ToDouble(listNodeAndParentNode[i].ThisYearAcount);
dr["thisYearValence"] = Convert.ToDouble(listNodeAndParentNode[i].ThisYearValence);
dr["fromBeginAcount"] = Convert.ToDouble(listNodeAndParentNode[i].FromBeginAcount);
dr["fromBeginValence"] = Convert.ToDouble(listNodeAndParentNode[i].FromBeginValence);
dr["surplusAcount"] = Convert.ToDouble(listNodeAndParentNode[i].SurplusAcount);
dr["surplusValence"] = Convert.ToDouble(listNodeAndParentNode[i].SurplusValence);
dr["month"] = int.Parse(listNodeAndParentNode[i].Month.ToString());
dr["year"] = int.Parse(listNodeAndParentNode[i].Year.ToString());
dr["IsEndMonth"] = listNodeAndParentNode[i].Month.ToString();
#endregion
tiv.UpdateByPK(dr);
}
}
//全域性變數listNodeAndParentNode，儲存修改過的樹節點
List<InspectionValuation> listNodeAndParentNode = new List<InspectionValuation>();
int i = 0;
private void FindParentNode(TreeListNode node,double dataChange)
{
InspectionValuation iv = new InspectionValuation();
#region 為InspectionValuation的物件賦值
iv.InspectionValuationID = int.Parse( node.GetValue(inspectionValuationID).ToString() );
iv.PrjDownListID = int.Parse(node.GetValue(prjDownListID).ToString());
iv.RowType = node.GetValue(rowType).ToString();
iv.PrjLwfbID = node.GetValue(prjLwfbID).ToString();
iv.PrjNodeID = node.GetValue(prjNodeID).ToString();
iv.TeamID = node.GetValue(teamID).ToString();
iv.PrjParentNodeID = node.GetValue(prjParentNodeID).ToString();
iv.MaterialName = node.GetValue(materialName).ToString();
iv.Unit = node.GetValue(unit).ToString();
iv.ContactAmount =Convert.ToDouble( node.GetValue(contactAmount) );
iv.Price = Convert.ToDouble(node.GetValue(price));
iv.ContactValence = Convert.ToDouble(node.GetValue(contactValence));
//如果 i = 1，說明該節點是手動修改的節點，修改過的值就不再加變化的值了，
//如果是其他節點那麼需要加變化的值，因為i是全域性變數，所以需要在一次修改之後將其值改為0
if (++i == 1)
{
iv.ThisMonthAcount = Convert.ToDouble(node.GetValue(thisMonthAcount)) ;
}
else
{
iv.ThisMonthAcount = Convert.ToDouble(node.GetValue(thisMonthAcount)) + dataChange;
}
//下面一句是將修改過的值顯示到節點上
node[thisMonthAcount] = iv.ThisMonthAcount.ToString();
iv.ThisMonthValence = Convert.ToDouble(node.GetValue(thisMonthValence));
iv.ThisYearAcount = Convert.ToDouble(node.GetValue(thisYearAcount));
iv.ThisYearValence = Convert.ToDouble(node.GetValue(thisYearValence));
iv.FromBeginAcount = Convert.ToDouble(node.GetValue(fromBeginAcount));
iv.FromBeginValence = Convert.ToDouble(node.GetValue(fromBeginValence));
iv.SurplusAcount = Convert.ToDouble(node.GetValue(surplusAcount));
iv.SurplusValence = Convert.ToDouble(node.GetValue(surplusValence));
iv.Month = int.Parse(node.GetValue(month).ToString());
iv.Year = int.Parse(node.GetValue(year).ToString());
iv.IsEndMonth = node.GetValue(IsEndMonth).ToString();
#endregion
//將一個節點上的值用InspectionValuation型別的物件儲存到listNodeAndParentNode中
listNodeAndParentNode.Add(iv);
//迴圈找到其父節點
if (node.ParentNode != null )
{
FindParentNode(node.ParentNode,dataChange);
}
//全域性變數重新設為0，如果不設為0，那麼第一個修改的值會重複累加
i = 0;
}
修改全部完成，雖然專案中沒有用到，但還是一點小case，自己記錄一下，每天都有點進步。
想清楚了再做，否則到最後的時候就可能做不下去。