DataBind DataGridViewRow.Tag to an item in a List

Question

0.00/5 (No votes)

See more:

, +

Hi experts,

let's assume this code

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace Test_DataBinding
{
    public partial class Form1 : Form
    {
        private FooContainer _foos = new FooContainer();

        public Form1()
        {
            InitializeComponent(); // Including Multiselect = false

            foreach (Foo foo in _foos.Items)
            {
                int rowIndex = dgvFoo.Rows.Add();
                dgvFoo.Rows[rowIndex].Cells["ObjectName"].Value = foo.Name;
                dgvFoo.Rows[rowIndex].Tag = foo;
            }

            //dgvFoo.DataBindings.Add(dgvFoo.selectedrow
        }


        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
        }
    }


    public class FooContainer
    {
        private List<foo> _fooList = new List<foo>();
        private Foo _selected = null;


        public FooContainer()
        {
            _fooList.Add(new Foo("First"));
            _fooList.Add(new Foo("Second"));
            _fooList.Add(new Foo("Third"));
        }


        public List<foo> Items
        {
            get { return (_fooList); }
        }


        public Foo SelectedItem
        {
            get { return (_selected); }
            set { _selected = value; }
        }
    }


    public class Foo
    {
        private string _name = string.Empty;


        public Foo(string name)
        {
            _name = name;
        }


        public string Name
        {
            get { return (_name); }
        }


        public override string ToString()
        {
            string name = _name;
            if(name==string.Empty)
                name = "NoName";

            return (name + "(" + this.GetType().ToString() + ")");
        }
    }
}
</foo></foo></foo>

What I'm trying to do in the line that is commented out is to databind the properties FooContainer.SelectedItem and DataGridView.SelectedRows.

The user should be able to change the selected item in FooContainer by changing the selection in the DataGridView.
And a programatical change in FooContainer.SelectedItem shall be shown in DataGridView.

FooContainer.SelectedItem is of type Foo.
DataGridView.SelectedRows is a list of DataGridViewRows with Foos attached as Tags.
How can thy be databound?

Thanks in advance,

luker

Posted 7-Apr-11 21:52pm

lukeer

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Amund Gjersøe · Accepted Answer · 2011-04-07T23:35:00

Hi
I'm focusing on "The user should be able to change the selected item in FooContainer by changing the selection in the DataGridView."

The following solution lets the user select items by clicking the cell, and the following event sets the according item in the bound data collection to the SelectedItem in your FooContainer-class.

Your should ask you self if the FooContainer-class really is needed.

Please remember to vote and comment!

C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace Test_DataBinding
{
    public partial class Form1 : Form
    {
        private FooContainer _foos = new FooContainer();

        public Form1()
        {
            InitializeComponent(); // Including Multiselect = false

            /*foreach (Foo foo in _foos.Items)
            {
                int rowIndex = dgvFoo.Rows.Add();
                dgvFoo.Rows[rowIndex].Cells["ObjectName"].Value = foo.Name;
                dgvFoo.Rows[rowIndex].Tag = foo;
            }*/

            //dgvFoo.DataBindings.Add(dgvFoo.selectedrow

            dgvFoo.DataSource = _foos.Items;
            dgvFoo.CellClick += new DataGridViewCellEventHandler(dgvFoo_CellClick);
        }


        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
        }
    }

    void dgvFoo_CellClick(object sender, EventArgs e)
    {
        foreach (DataGridViewRow row in dgvFoo.SelectedRows)
        {
            Foo myFoo = row.DataBoundItem as Foo;
            if (myFoo != null)
            {
                // Assuming only one selected
                _foos.SelectedItem = myFoo;
            }
        }
    }


    public class FooContainer
    {
        private BindingList<foo> _fooList = new BindingList<foo>();
        private Foo _selected = null;


        public FooContainer()
        {
            _fooList.Add(new Foo("First"));
            _fooList.Add(new Foo("Second"));
            _fooList.Add(new Foo("Third"));
        }


        public BindingList<foo> Items
        {
            get { return (_fooList); }
        }


        public Foo SelectedItem
        {
            get { return (_selected); }
            set { _selected = value; }
        }
    }


    public class Foo
    {
        private string _name = string.Empty;


        public Foo(string name)
        {
            _name = name;
        }


        public string Name
        {
            get { return (_name); }
        }


        public override string ToString()
        {
            string name = _name;
            if(name==string.Empty)
                name = "NoName";

            return (name + "(" + this.GetType().ToString() + ")");
        }
    }
}</foo></foo></foo>