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Hierarchy with

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GridView

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David asked on 22 Sep 2010, 04:51 PM

*edit* Forgot to title the post properly! Should be "Hierarchy with multiple child datasources" Feel free to correct this admins!

I've got a code defined hierarchy to work fine in C#, with a RadGridView with a datasource etc and then defined a template with a relation and a datasource for the child rows and assigned these to the RadGridView.

This works fine and the '+' expands and shows the child rows.

What I want to do though is have the expanded child row be from a different datasource depending on some value in the parent. Ie what expands has different columns depending on the parent row.

I can't seem to specify more than one datasource for the childrows.
What I want to see is:

AAA BBB CCC    (Parent row)
--d e f                                    (Expanded child row)
AAA2 BBB2 CCC2                 (Parent row)
--g h i                                     (Expanded child, different columns/datasource to the other child row)

The parent rows have the same columns/datasource.
The child rows have different columns/datasource.

Is this possible and can both different child rows be expanded at the same time?

6 Answers, 1 is accepted

answered on 27 Sep 2010, 01:55 PM

multi-childs.PNG

I seem to have semi managed what I wanted...

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using Telerik.WinControls.UI;

namespace Telerik_Hierarchy

{

public partial class Form1 : Form

{

List<Person> People = new List<Person>();

List<Address> Houses = new List<Address>();

List<Car> Cars = new List<Car>();

GridViewTemplate carTemplate = new GridViewTemplate();

GridViewTemplate houseTemplate = new GridViewTemplate();

public Form1()

{

InitializeComponent();

this.radGridView1.AutoGenerateHierarchy = true;

People.Add(new Person(1, 101, "Bob", 42));

People.Add(new Person(2, 102, "Rob", 88));

People.Add(new Person(3, 103, "Eric", 22));

this.radGridView1.DataSource = People;

this.radGridView1.BestFitColumns();

Houses.Add(new Address(1, 44, "Badger street"));

Houses.Add(new Address(2, 16, "Fish street"));

Houses.Add(new Address(3, 18, "Goat road"));

Cars.Add(new Car(101, "Ford"));

Cars.Add(new Car(101, "BMW"));

Cars.Add(new Car(101, "Mazda"));

Cars.Add(new Car(102, "Merc"));

Cars.Add(new Car(103, "Honda"));

// Now create relations

carTemplate.DataSource = Cars;

GridViewRelation carsRelation = new GridViewRelation(this.radGridView1.MasterTemplate);

carsRelation.ChildTemplate = carTemplate;

carsRelation.RelationName = "ParentChild";

carsRelation.ParentColumnNames.Add("ID2");

carsRelation.ChildColumnNames.Add("ID");

this.radGridView1.Relations.Add(carsRelation);

carTemplate.BestFitColumns();

carTemplate.Caption = "Cars";

houseTemplate.DataSource = Houses;

GridViewRelation houseRelation = new GridViewRelation(this.radGridView1.MasterTemplate);

houseRelation.ChildTemplate = houseTemplate;

houseRelation.RelationName = "ParentChild";

houseRelation.ParentColumnNames.Add("ID");

houseRelation.ChildColumnNames.Add("ID");

this.radGridView1.Relations.Add(houseRelation);

houseTemplate.BestFitColumns();

houseTemplate.Caption = "Houses";

this.radGridView1.MasterTemplate.Templates.Add(houseTemplate);

this.radGridView1.MasterTemplate.Templates.Add(carTemplate);

}

private void Form1_Load(object sender, EventArgs e)

{

this.radGridView1.BestFitColumns();

}

public class Person

{

public int ID { get; set; }

public int ID2 { get; set; }

public string Name { get; set; }

public int Age { get; set; }

public Person(int id, int id2, string name, int age)

{

ID = id;

ID2 = id2;

Name = name;

Age = age;

}

public class Address

{

public int ID { get; set; }

public int Number { get; set; }

public string Street { get; set; }

public Address(int id, int number, string street)

{

ID = id;

Number = number;

Street = street;

}

public class Car

{

public int ID { get; set; }

public string Model { get; set; }

public Car(int id, string model)

{

ID = id;

Model = model;

}

This gives the attached output, which is pretty much what I want.
I need to be able to programtically hide/show the "Houses"/"Cars" tabs though.

Have I done something terrible in doing this? OR did I just not phrase the question very well? :-)

Accepted

answered on 28 Sep 2010, 07:12 AM

Hello again,

I think i misunderstood what you meant, i was thinking that you wanted something like a car list for one person and JUST a house list for another person, but in any case , in my point of view the best way of achieving your desired effect is to somehow access the TabStrip inside the child row and just close one of the tabs and select the other one on ChildViewExpanding or on ChildViewExpanded, but i haven't yet figured it out how to get to that

Update... i found an answer here, but sadly it is not possible to do that, if you really want to i might be able to help you some other way, but it is more complicated and more error prone without extensive testing, but if you really want to please let me know and i will try to help you.

Best Regards,
Emanuel Varga

answered on 05 Oct 2010, 12:01 PM

Hello David,

Thank you for writing to us.

This functionality is not supported in RadGridView. You can add two child views in the parent collection and have two different DataSources and Columns, but this a valid case for the GridViewTemplate level and not for the row level. For more details about this scenario, please review our Examples application, section GridView >> Hierarchy >> Tab Child Views.

I hope this was helpful.

Kind regards,
Julian Benkov
the Telerik team

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