In the view page, add an element and map the properties defined to the corresponding fields in data source. public partial class DefaultFunctionalities : System. You can find many other good combinations that make your UI more user-friendly and easier to use.//Define local DataSource elements by using the ID, ParentID, Text and HasChild fields in code behind and map the list data to DataSource property. Specify an ImageSet property that selects a set of built-in images to render with the control at run time. We used simple hack to get over the postback issue of TreeView control and we made it work as client-side component that is initialized in server. To customize the look and feel of the TreeView control, you can do the following: Specify properties of the TreeView control that affect the control display and rendering. In this posting I showed you how you can quickly produce good results when combining jQuery and ASP.NET controls without pushing to the limits. JQuery components and ASP.NET controls have both their strong sides and weaknesses. Seems very basic but it is not hard to make it look more professional using style sheets. I applied some more bells and whistles and sample data to source code to make my sample more informative. In this function we are free to use node text and value as we like. Instead of postback our callback function is used and provided with selected values. Now we have TreeView that renders nodes the way that postback doesn’t happen anymore. Node.NavigateUrl = "javascript:selectNode('" + node.Value + Private void SetSelectNodeUrls( TreeNodeCollection nodes) Name it, and select MVC template from second screen so Visual Studio can generate. protected override void OnPreRender( EventArgs e) Step 1: Create a new ASP.NET Core MVC project in your Visual Studio, by navigating to File -> New -> Project -> Select 'Web' from left-pane and ASP.NET Core MVC web application from right-pane. You get the better idea why I did so if you look at server-side code that corrects NavigateUrl properties of TreeView nodes. Notice that this function returns undefined. Īlert( "You selected: " + value + " - " + text) Also we have to make sure that this function returns something that is not processed by browser. We have to make sure that when user clicks the node then information is sent to some JavaScript function. We solve these to problems at same time: let’s move to JavaScript links. Also we need to find a way how to let our client-side code to know that something was selected from TreeView. The top-level in the tree view is the root node with. Number one problem is getting over the postbacks because in our scenario postbacks only screw up things. The TreeView control is used to display a hierarchical representation of the same data in a tree structure. This example works for you if you need something done quickly. For more advanced scenarios I suggest you to use some jQuery based tree component. Be warned that if you need more than I show you here you need to write a lot of JavaScript code. TreeView needs some little hacking to make it work as client-side component. If you are going to use it in some real-world application then this mark-up gets even shorter – I am sure that in most cases the data you display in TreeView comes from database or some domain specific data source. Notice that our mark-up is very compact for what we will achieve. Here is the mark-up of our form’s main content area. I add some jQuery based JavaScript to my page head to get dialog and button work. If you are not sure how to include jQuery UI to your page then take a look at source code – GitHub also allows you to browse files without downloading them. In this posting I will show you how to use ASP.NET TreeView control and jQuery UI dialog component to build picker dialog that hosts tree data.Īs I don’t like to invent wheels then I will use jQuery UI to solve the question related to dialogs. Selecting things from dialogs and data represented as trees are very common things we see in business applications.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |