操作Devexpress treelist中的项
如果需要在单元格添加时则用TreeList如果只是单纯读取数据或检索数据时则用GridControl
1.如果点击添加 时则添加TreeList的节点：
protected internal void btnAdd_Click(object sender, EventArgs e)
{
if (treeList1.Nodes.Count == 0)
{
TreeListNode node = treeList1.AppendNode(new object[] { 0}, -1); //数组中可写多个参数，但是每一个参数代表一列
}
else
{
int dy = Convert.ToInt32(treeList1.Nodes.LastNode.GetValue("cID")); //获取最后一节点ID
TreeListNode node = treeList1.AppendNode(new object[] { dy + 1 }, -1);
}
}
2. cPort = treeList1.Nodes[i].GetDisplayText("cPort").ToString().Trim(); //获取单元格中的文本，cport代表列名
bool falge = Convert.ToBoolean(treeList1.Nodes[i].GetValue("cFlage")); //获取复选框的值，cFlage则代表列名
3.删除选中的节点
/// <summary>
/// 最后选择的节点
/// </summary>
TreeListNode deletenode;
private void treeList1_AfterFocusNode(object sender, DevExpress.XtraTreeList.NodeEventArgs e)
{
deletenode =e.Node; //获取最后的ID
}
public void btnDel_Click(object sender, EventArgs e)
{
this.treeList1.DeleteNode(deletenode); //删除节点
}
4.给节点添加图片
treeListDevice.AppendNode(new object[] { id, type }, 0, 0, 0, 0); //0代表第几张图片代表根目录用的，-1代表子节点图片
5.给节点添加背景颜色
private void treeListConcentration_CustomDrawNodeCell(object sender, CustomDrawNodeCellEventArgs e)
{
string sql = "select 报警信息 from 实时监测数据 where 设备编号='" + nodeID + "'";
DataTable dt = DataHelper.ExecuteDataTable(sql, DataHelper.DataBaseType.属性数据库);
if (dt.Rows.Count > 0)
{
string co = "";
string wornInfo = dt.Rows[0]["报警信息"].ToString();
//string co = wornInfo.Substring(0, 1);//一氧化碳
//string h2s = wornInfo.Substring(1, 1);//硫化氢
//string cl2 = wornInfo.Substring(2, 1);//录气
//string O2 = wornInfo.Substring(3, 1);//氧气
//string hn3 = wornInfo.Substring(4, 1);//氨气
//string pid = wornInfo.Substring(5, 1);//光电离
//string hcl = wornInfo.Substring(5, 1);//椂化氢
string ch4 = wornInfo.Substring(6, 1);//甲烷
if (e.Node[1] != null)
{
if (e.Node[0].ToString().Trim() == "一氧化碳（ppm）")
{
message = wornInfo.Substring(0, 1);//一氧化碳
CellBackColor(e, message);
}
if (e.Node[0].ToString().Trim() == "硫化氢（ppm）")
{
message = wornInfo.Substring(1, 1);//硫化氢
CellBackColor(e, message);
}
if (e.Node[0].ToString().Trim() == "氯气（ppm）")
{
message = wornInfo.Substring(2, 1);//录气
CellBackColor(e, message);
}
if (e.Node[0].ToString().Trim() == "氧气（VOL%）")
{
message = wornInfo.Substring(3, 1);//氧气
CellBackColor(e, message);
}
if (e.Node[0].ToString().Trim() == "氨气（ppm）")
{
message = wornInfo.Substring(4, 1);//氨气
CellBackColor(e, message);
//e.Appearance.BackColor = Color.Red;
}
if (e.Node[0].ToString().Trim() == "光电离（ppm）")
{
message = wornInfo.Substring(5, 1);//光电离
CellBackColor(e, message);
//e.Appearance.BackColor = Color.Blue;
}
if (e.Node[0].ToString().Trim() == "氯化氢（ppm）")
{
message = wornInfo.Substring(6, 1);//椂化氢
CellBackColor(e, message);
//e.Appearance.BackColor = Color.Blue;
}
if (e.Node[0].ToString().Trim() == "甲烷（LEL%）")
{
message = wornInfo.Substring(7, 1);//甲烷
CellBackColor(e, message);
//e.Appearance.BackColor = Color.Blue;
}
}
}
}
//设置多个颜色
private void CellBackColor(CustomDrawNodeCellEventArgs e, string message)
{
switch (message)
{
case "Z"://传感器未打开
e.Appearance.BackColor = Color.Yellow;
break;
case "I"://传感器通信中断
e.Appearance.BackColor = Color.Blue;
break;
case "L"://传感器错误
e.Appearance.BackColor = Color.Brown;
break;
case "A"://传感器阈值报警
e.Appearance.BackColor = Color.Red;
break;
default:
e.Appearance.BackColor = Color.Empty;
break;
}
}
数据源绑定TreeList
//查询设备
public static void selectDevice(TreeList treeDevice)
{
string sql = "select dID,dName from DeviceMap ";
DataTable dt= DataHelper.ExecuteDataTable(sql, DataHelper.DataBaseType.属性数据库);
if (dt.Rows.Count>0)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
string id = dt.Rows[i]["dID"].ToString();
string type = dt.Rows[i]["dName"].ToString();
treeDevice.AppendNode(new object[] { id,type }, -1);
}
}
}
treeDevice.Columns["dID"].Caption = "类别";
treeDevice.Columns["dType"].Caption = "别名";
注意：必须得绑定字段
//中间插入节点
private void treeList2_CellValueChanged(object sender, DevExpress.XtraTreeList.CellValueChangedEventArgs e)//单元已有值就会增添一条空信息
{
string name = e.Node.GetDisplayText(0);
if (name != "")
{
TreeListNode node = treeList2.AppendNode(new object[] { "" }, -1);
treeList2.SetNodeIndex(node,e.Node.Id+1);
//treeList2.AppendNode(new object[] { "" }, -1);
}
}
获得选中的节点
nodeID = Convert.ToInt32(treeList1.FocusedNode.GetValue(treeListColumn6));