I want to implement pagination in telerik radgridview for vb.net windows form. Instead of assign the datasource one time, I want to get data from mysql on each pagination per page so that it is fast in retrieving data. How can i implement this?
RadGridView supports client-side paging. Hence, RadGridView has a DataSource applied to it which stores all records and the data is represented in multiple pages: https://docs.telerik.com/devtools/winforms/controls/gridview/paging/overview
However, if you want to load data on-demand, it is appropriate to use RadVirtualGrid which also supports paging. The following help articles are quite useful about getting familiar with the control and how to populate it with data:
https://docs.telerik.com/devtools/winforms/controls/virtualgrid/overview
https://docs.telerik.com/devtools/winforms/controls/virtualgrid/working-with-data/virtualgrid-populating-with-data
https://docs.telerik.com/devtools/winforms/controls/virtualgrid/paging/paging-overview
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I'm currently working on a web app using .NET Core and Razor pages.
So after getting the CRUD elements pretty much sorted, the final part for me is to create a page so they can view their main data.
At the moment, their requirements for searching data would be by person and / or by project.
My initial plan is to give them two drop downs containing each of these data. And when they're happy to start the search, press a button and a SP will retrieve the data from the data base.
The bit I need help with is displaying the data. Before I was using fairly standard HTML tables in the page.
However now that the data will be refreshed and will be different based on the search parameters I'm not too sure on how to implement this.
The only way I can think of doing this is to create a API to get the data back from the DB in a JSON format and then use JavaScript functions, possibly including the data tables plugin.
Any help or suggestions would be much appreciated.
Thank you
I want to create the design of a SQL database that will hold the data entered from a dynamic created websites (something like http://www.wufoo.com).
Users of the system will create forms by dragging controls into the form and then they will use the created forms to build a website by including the forms in some pages.
What would be the options that I have when I create the architecture of the database.
Since you do not know what you will get in your DB, how the object will look like; I would suggest using NoSql.
Otherwise you need to create some very abstract table, let's say Form, and then make in inheritable by other tables (ye, you can do that in EF)
I'm working on an ASP.NET 4.0 site, which I inherited ownership of.
It has a number of existing LINQ datasources pointing to individual tables. For example, to the Patient Encounter Summary table in SQL Server.
The problem is in displaying the data there. It's a normalized database, so that table contains (for example) the provider ID, rather than the provider name.
It's simple enough to join the Patient Counter Summary to the Providers table (in SQL)... but how does one do that in ASP.NET? I'm not sure of the correct nomenclature, but the 'mid layer' is VB.
So, the existing LinqDataSource entries are all to individual tables. I tried building a view in SQL Server to do all the joins, but the LinqDataSource doesn't 'see' such views as an option... even if it's read-only (no update, delete, or insert).
Please pardon my ignorance, but it looks like it should be so simple. For example, I have things like <asp:Label ID="Label12" runat="server" Text='<%# Bind("AttendingPhysicianID") %>'></asp:Label>... that it appears to me would be so simple if the LINQ DataSource was a view that joined the tables so I could change it to PhysicianName coming from the Physicians table.
Any guidance would be most appreciated... ideally at the level of 'this guy doesn't know anything'. :-) That is, I've seen all sorts of what looks like VB code on answers to similar questions, but don't know how to implement that within this structure.
Thanks much.
I would recomment to bookmark 101 LINQ samples, it is quite helpful.
Here is answer to your question: http://msdn.microsoft.com/en-us/vstudio/bb737909
Although this question is to do with LinqToSql joins, you state you are attempting to do this because you couldn't expose a pre-written SQL View via the Linq DataSource.
If there is value in using the SQL View you've written, and in having that view accessible outside your VB libaries, I would suggest going the first route and getting the LinqDataSource to expose your SQL View.
Try looking here:
http://msdn.microsoft.com/en-us/library/bb384396.aspx
You're using a System.Web.UI.WebControls.LinqDataSource. Imo, this is a control that lets you use strings to opaquely interact with (what was) a compiler verified query generation technology.
Here's a link to the documentation.
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.linqdatasource.aspx
Here's some relevant passages:
Select - Gets or sets the properties and calculated values that are included in the retrieved data.
The LinqDataSource control enables you to use LINQ in an ASP.NET Web page by setting properties in markup text. The LinqDataSource control uses LINQ to SQL to automatically generate the data commands.
When you are querying a database... You then set the ContextTypeName property to the class that represents the database and set the TableName property to the property that represents the database table.
5.Select (specify which fields or properties to return).
However, if you set the Select property, it means that automatic update, insert, and delete operations cannot be enabled.
So I would think you could include a subquery in the select property to convert an Order.CustomerId into a Customer.Name
But if I were in your shoes, I would abandon the LinqDataSource and just write LinqToSql compiler verified queries.
We are working on a sync application using ColdFusion 9.0.1 ActionScript ORM Library for AIR applications. Since this is application should work smoothly offline as well, there is a list of clients that has to be loaded when a user logs in, hence we are fetching data from all the required tables when application loads (is that the right way?). Now when we get the data from the required tables then based on the user who logs in we have to filter the clients, to filter this the query required is a complex one with joins between 5-6 tables and where clause. What I found that using the Coldfusion.Air.Session class we can only load objects of tables with simple where clause. There is non ORM way to load the data but I don't think that is the right method. Is there any method using this ORM framework to load data using such complex queries.
Thanks,
Gaurav
Are you using any CF code to send data back to your application? Have you tried HQL?
In other words you can write standard cfquery and dbtype="hql"
This will let you do almost anything you can do with a standard cfquery.
I am not directly familiar with the ActionScript ORM Library for AIR.
Is there any way to provide multiple columns in RadTreeView with column headers? I know this can be achieved using RadTreeListView, but I dont want to use that as that doesn't support Hierarchical data template.
The RadTreeListView allows you to display items in a hierarchical structure using the HierarchyColumnIndex property. See the documentation for more details.
You can combine that feature with the ability to create your own templates in order to achieve the result you want.
Hopefully that helps.