请问怎么动态改换treeview的节点小图标

Question

可以先把想改变的图标及改后的图标都放在listView控件中.然后在写程序时动态改变TreeView的图标索引值就可以了.

Answer 1

应该也可以放在 ImageList 吧？

Answer 2

把图标放在ImageList里面。什么时候想改变图标，设置节点的ImageIndex属性就行了！！！

Answer 3

1) 先CreateDeptImageList();
private void CreateDeptImageList()
{
try
{
ImageList TreeviewIL = new ImageList();
System.Drawing.Image imageDeptTree01 = Image.FromFile(System.IO.Directory.GetCurrentDirectory()+"\\DeptTree01.ico");
System.Drawing.Image imageDeptTree02 = Image.FromFile(System.IO.Directory.GetCurrentDirectory()+"\\DeptTree02.ico");
System.Drawing.Image imageDeptTree03 = Image.FromFile(System.IO.Directory.GetCurrentDirectory()+"\\DeptTree03.ico");
System.Drawing.Image imageDeptTree04 = Image.FromFile(System.IO.Directory.GetCurrentDirectory()+"\\DeptTree04.ico");
TreeviewIL.Images.Add(imageDeptTree01);
TreeviewIL.Images.Add(imageDeptTree02);
TreeviewIL.Images.Add(imageDeptTree03);
TreeviewIL.Images.Add(imageDeptTree04);
this.tvwActAssign.ImageList = TreeviewIL;
}
catch(Exception ex)
{
ex.ToString();
}
}
2) 再使用递归调用显示子树，InitDeptTree(tvwActAssign.Nodes,"1");
private void InitDeptTree(TreeNodeCollection Nds,string ParentId)
{
try
{
//建树的基本思路是：从根节点开始递归调用显示子树.
ExecuteDBCommand.ExeDBCmd ExeDBSP=new ExecuteDBCommand.ExeDBCmd();
DataSet ds=new DataSet();
ds=ExeDBSP.FillComboBoxContents("InitActAssignDeptTree");
DataView dv=new DataView();
TreeNode tmpNd;
string intId,SelEmpActNo;
dv.Table=ds.Tables[0];
string ft="ParentDeptCode=" + ParentId.Trim();
dv.RowFilter=ft.ToString();
foreach(DataRowView drv in dv)
{
tmpNd=new TreeNode();
tmpNd.Tag=drv["DeptCode"].ToString();
tmpNd.Text=drv["DeptName"].ToString();
if (tmpNd.Tag.ToString().Length>2)
{
if (tmpNd.Tag.ToString().Substring(0,2)=="#$")
{
DataSet dsActNo=new DataSet();
dsActNo=ExeDBSP.GetSelectedEmpActNo(tmpNd.Tag.ToString(),tmpNd.Text.Trim());
SelEmpActNo=dsActNo.Tables[0].Rows[0][0].ToString();
tmpNd.Text=tmpNd.Text+SelEmpActNo;
if (SelEmpActNo.IndexOf("无帐套",0,SelEmpActNo.Length)!=-1){tmpNd.ForeColor=System.Drawing.Color.Red;}
tmpNd.ImageIndex =3;tmpNd.ExpandAll();
}
else {tmpNd.ImageIndex =1;tmpNd.ExpandAll();}
}
else {tmpNd.ImageIndex =1;tmpNd.ExpandAll();}
Nds.Add(tmpNd);
intId=drv["ParentDeptCode"].ToString();
InitDeptTree(tmpNd.Nodes,tmpNd.Tag.ToString());
}
}
catch(Exception ex)
{
ex.ToString();
}
}
3）注意：ImageIndex和SelectedImageIndex是不同的.