我在我的 ASP.NET Web 应用程序中有一个 TreeView 控件,并且我在事件选择节点更改时遇到问题,我单击树视图中的某个节点但事件没有触发,我有一些未执行的指令,我也用调试器检查过。
<asp:TreeView ID="ArboreSarcini" runat="server" ImageSet="News"
onselectednodechanged="ArboreSarcini_SelectedNodeChanged" NodeIndent="10"
style="z-index: 1; left: 1px; top: 27px; position: absolute; height: 308px; width: 446px">
<HoverNodeStyle Font-Underline="True" BackColor="#99CCCC" Font-Size="12pt" />
<LeafNodeStyle ImageUrl="~/Poze/leaf.png" NodeSpacing="2px" />
<LevelStyles>
<asp:TreeNodeStyle BorderColor="Black" BorderStyle="Solid" BorderWidth="1px"
Font-Names="Leelawadee" Font-Size="Medium" Font-Underline="False"
ImageUrl="~/Poze/Root.png" />
<asp:TreeNodeStyle BorderColor="#003300" BorderStyle="Solid" BorderWidth="1px"
Font-Names="Leelawadee" Font-Underline="False" ImageUrl="~/Poze/node.png"
Width="400px" />
<asp:TreeNodeStyle BorderColor="#006600" BorderStyle="Solid" BorderWidth="1px"
Font-Names="Leelawadee" Font-Underline="False" Height="10px"
ImageUrl="~/Poze/leaf.png" Width="390px" />
</LevelStyles>
<NodeStyle Font-Names="Leelawadee" Font-Size="10pt" ForeColor="Black"
HorizontalPadding="5px" NodeSpacing="2px" VerticalPadding="0px"
ImageUrl="~/Poze/node.png" Width="0px" />
<ParentNodeStyle Font-Bold="False" Width="500px" />
<RootNodeStyle ImageUrl="~/Poze/Root.png" />
<SelectedNodeStyle Font-Underline="False" BackColor="#009148" BorderWidth="2px"
Font-Bold="False" Font-Italic="True" Font-Size="12pt" />
</asp:TreeView>
protected void Button1_Click(object sender, EventArgs e)
{
ArboreSarcini.Nodes.Clear();
populeaza_sarcini();
string sqlstring1 = "Select * from activitati";
System.Data.SqlClient.SqlConnection con1 = new System.Data.SqlClient.SqlConnection(
"Data Source=BOGDAN-PC\\BOGDAN;Initial Catalog=ePlanning;Integrated Security=SSPI;Connect Timeout=10;TrustServerCertificate=True ");
System.Data.SqlClient.SqlCommand comm1 = new System.Data.SqlClient.SqlCommand(sqlstring1, con1);
System.Data.SqlClient.SqlDataReader reader1;
con1.Open();
reader1 = comm1.ExecuteReader();
while (reader1.Read())
{
foreach (Sarcina s in listaSarcini)
{
if ((int)reader1["id_sarcina"] == s.Id_sarcina)
{
s.ListaActivitati.Add(new Activitate(Convert.ToInt32(reader1["id_activitate"]), reader1["descriere"].ToString()));
}
}
}
TreeNode tatal = new TreeNode();
tatal.Value = DropListProiecte.SelectedItem.ToString();
// ArboreSarcini.Nodes.Add(tatal);
TreeNode parentNode = new TreeNode();
foreach (Sarcina sarc in listaSarcini)
{
parentNode = new TreeNode( sarc.Id_sarcina.ToString() + ". " + sarc.Descriere.ToString());
foreach (Activitate act in sarc.ListaActivitati)
{
TreeNode copil = new TreeNode(act.Id_activitate.ToString()+". "+act.Descriere.ToString() );
parentNode.ChildNodes.Add(copil);
}
tatal.ChildNodes.Add(parentNode);
//parentNode.Collapse();
}
ArboreSarcini.Nodes.Add(tatal);
con.Close();
ArboreSarcini.ExpandAll();
}
protected void ArboreSarcini_SelectedNodeChanged(object sender, EventArgs e)
{
if (ArboreSarcini.SelectedNode.ImageUrl == "~/Poze/node.png")
{
System.Data.SqlClient.SqlConnection con = new System.Data.SqlClient.SqlConnection(
"Data Source=BOGDAN-PC\\BOGDAN;Initial Catalog=ePlanning;Integrated Security=SSPI;Connect Timeout=10;TrustServerCertificate=True ");
// string de_splituit = ArboreSarcini.SelectedNode.Text;
string[] id_sarcina = ArboreSarcini.SelectedNode.Text.Split('.');
string sqlstring = "Select * from sarcini where id_sarcina=" + id_sarcina[0] + ";";
System.Data.SqlClient.SqlCommand comm = new System.Data.SqlClient.SqlCommand(sqlstring, con);
System.Data.SqlClient.SqlDataReader reader;
con.Open();
reader = comm.ExecuteReader();
while (reader.Read())
{
tbIDSarcina.Text = reader["id_sarcina"].ToString();
}
}
}