Hi all,
I'm quite new to Infragistics.
Could you pls help my issue below.
I have Infragistics tree created, however when i add event for Node clicked or Selection changed, whenever I clicked on the tree node itself, the tree will disappear.
However whenever i removed the code behind event for node clicked or selection changed, whenever i clicked on the node, the tree did not disappear.
How to add event for node clicked, without making the tree disappear?
Here's my aspx code
<ignav:UltraWebTree id="AITree" runat="server" Width="400px" Height="400px" LoadOnDemand="ManualSmartCallbacks" Font-Names="Verdana" Font-Size="8pt" EnableViewState="False" CompactRendering="False" ExpandImage="images/ig_treeXPPlus.gif" CollapseImage="images/ig_treeXPMinus.gif" WebTreeTarget="ClassicTree" ForeColor="Black" BorderColor="Pink" BorderStyle="None" Indentation="20" Cursor="Default" BackImageUrl="" DefaultImage="" DefaultIslandClass="" DefaultItemClass="" DefaultSelectedImage="" DisabledClass="" FileUrl="" HiliteClass="" HoverClass="" JavaScriptFilename="" JavaScriptFileNameCommon="" LeafNodeImageUrl="" NodeEditClass="" ParentNodeImageUrl="" RootNodeImageUrl="" TargetFrame="" TargetUrl="" ExpandOnClick="True" AllowDrag="True" AllowDrop="True"> <SelectedNodeStyle Cursor="Hand" ForeColor="White" BackColor="DarkBlue" CssClass="SelectClass"></SelectedNodeStyle> <HoverNodeStyle Cursor="Hand" CssClass="Hover"></HoverNodeStyle> <NodePaddings Left="5px"></NodePaddings> <Padding Top="10px"></Padding> <Levels> <ignav:Level Index="0" CheckboxColumnName="" ColumnName="" ImageColumnName="" LevelClass="" LevelHiliteClass="" LevelHoverClass="" LevelImage="" LevelIslandClass="" LevelKeyField="" RelationName="" TargetFrameName="" TargetUrlName=""></ignav:Level> <ignav:Level Index="1" CheckboxColumnName="" ColumnName="" ImageColumnName="" LevelClass="" LevelHiliteClass="" LevelHoverClass="" LevelImage="" LevelIslandClass="" LevelKeyField="" RelationName="" TargetFrameName="" TargetUrlName=""></ignav:Level> </Levels> <NodeMargins Top="2px"></NodeMargins> <Styles> <ignav:Style BackColor="OldLace" CssClass="HiliteClass" Cursor="Hand" ForeColor="Black"> </ignav:Style> <ignav:Style BackColor="Gainsboro" BorderColor="DarkGray" BorderStyle="Solid" BorderWidth="1px" CssClass="Hover"> <Padding Bottom="2px" Left="2px" Right="2px" Top="2px" /> </ignav:Style> <ignav:Style BackColor="#333333" CssClass="SelectClass" ForeColor="White"> <Padding Bottom="2px" Left="2px" Right="2px" Top="2px" /> </ignav:Style> </Styles> <ClientSideEvents /> </ignav:UltraWebTree>
My code behind
Protected Sub AITree_NodeSelectionChanged(ByVal sender As System.Object, ByVal e As Infragistics.WebUI.UltraWebNavigator.WebTreeNodeEventArgs) Handles AITree.NodeSelectionChanged Response.Write("test") End Sub
Another question:
How can we call .NET code from the javascript client-side??
Thanks!
Hi Sistasi,
The reason why your tree is disappearing after a postback is because EnabledViewState is set to false.
ASP.NET maintains a page level information using ViewState on each postback, regardless if that postback is caused by another control on the page or by the tree itself. So when ViewState is set to false you have to re-bind the control once again, because no information about the control is maintained between postbacks.
Please test your code after making following change:UltraWebTree.EnabledViewState = true.
After making this change you will see that tree will not disappear because its state is stored in the ViewState.
Please let me know if you have any questions with this matter.
Sincerely,Neha
Hi Neha,
Thanks, it seems like the case.
One more question, how do I set the selected node on the tree based on the datakey?
tree.Nodes(0).selected = true
but how do i know which item on the node based on the datakey?
Thanks.
try this c# code you need Vb equivalent, the key is the key you are using.
tree.
Nodes.Search(
"",Key,0,0);
Hi,
What is datatag/key (to be used for the second param)?
sorry the code got screwed
tree.Nodes.Search(text,key,0,false);