Select Row

[Roya]

Hello
 i want to select Gridview rows by pressing Space Key, and change the status of them to selected. for example by pressing Space , if the row is selected change the status of it to no selected ,if its not selected change the status to selected.in addition i want to change the back color of the selected row.
Ill be thankfull if you could help me.

[Richard Slade]

Hello Roya,

Here is an example of what you have asked for. The RadGridView in this example is ReadOnly as the Space key usually trigger a cell edit. 

// keep track of the selected index
private int _selectedRowIndex = 0;

this.radGridView1.SelectionChanged += new EventHandler(radGridView1_SelectionChanged);

this.radGridView1.KeyDown += new KeyEventHandler(radGridView1_KeyDown);

this.radGridView1.ReadOnly = true;

this.radGridView1.MultiSelect = false;

this.radGridView1.Rows[0].IsCurrent = true;

this.radGridView1.Rows[0].IsSelected = true;

void radGridView1_SelectionChanged(object sender, EventArgs e)
{
    if (this.radGridView1.SelectedRows.Count > 0)
    {
        _selectedRowIndex = this.radGridView1.SelectedRows[0].Index;
    }
}

void radGridView1_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Space)
    {
        if (this.radGridView1.SelectedRows.Count > 0)
        {
            _selectedRowIndex = this.radGridView1.SelectedRows[0].Index;
            this.radGridView1.ClearSelection();
            this.radGridView1.CurrentRow = null;

        }
        else
        {
            this.radGridView1.Rows[_selectedRowIndex].IsCurrent = true;
            this.radGridView1.Rows[_selectedRowIndex].IsSelected = true;
        }
    }

}

As for changing the back colour, you can do this via the RowFormatting event
For example

this.radGridView1.RowFormatting += new RowFormattingEventHandler(radGridView1_RowFormatting);

void radGridView1_RowFormatting(object sender, RowFormattingEventArgs e)
{
    if (e.RowElement.IsSelected && e.RowElement.IsCurrent)
    {
        e.RowElement.NumberOfColors = 1;
        e.RowElement.BackColor = System.Drawing.Color.LightBlue;
        e.RowElement.DrawFill = true;
    }
    else
    {
        e.RowElement.ResetValue(LightVisualElement.NumberOfColorsProperty);
        e.RowElement.ResetValue(LightVisualElement.BackColorProperty);
        e.RowElement.ResetValue(LightVisualElement.DrawFillProperty);
    }
}

You can read more about formatting rows and cells here: (formatting rows & formatting cells)

Hope this helps
Richard

[Roya]

Thank you Richard
I Used Your solution and it works, but I want to have multiselection .is it possible?

[Richard Slade]

Hello Roya, 

You should just be able to replace the reference to _selectedRowIndex to an Integer array. You can then cycle through the array in the key down to select the rows that were previously selected. 

If this helps, please remember to mark all helpful posts as answer. If you need further assistance, just let me know
thanks
Richard

[Roya]

Thank you Richard
is it possible for you to  tell me how can i do it.its not clear for me

[Richard Slade]

Hello Roya, 

Here is a sample for you. Hope it helps. Please remember to mark as answer if this helps or let me know if you have further questions

Designer File

namespace RadControlsWinFormsApp1
{
    partial class RadForm1
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.radGridView1 = new Telerik.WinControls.UI.RadGridView();
            ((System.ComponentModel.ISupportInitialize)(this.radGridView1)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this)).BeginInit();
            this.SuspendLayout();
            //
            // radGridView1
            //
            this.radGridView1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.radGridView1.Location = new System.Drawing.Point(0, 0);
            this.radGridView1.Name = "radGridView1";
            this.radGridView1.Size = new System.Drawing.Size(343, 467);
            this.radGridView1.TabIndex = 4;
            this.radGridView1.Text = "radGridView1";
            //
            // RadForm1
            //
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(343, 467);
            this.Controls.Add(this.radGridView1);
            this.Name = "RadForm1";
            //
            //
            //
            this.RootElement.ApplyShapeToControl = true;
            this.Text = "RadForm1";
            this.ThemeName = "ControlDefault";
            ((System.ComponentModel.ISupportInitialize)(this.radGridView1)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this)).EndInit();
            this.ResumeLayout(false);

        }

        #endregion

        private Telerik.WinControls.UI.RadGridView radGridView1;
    }
}

Form 

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Telerik.WinControls;
using Telerik.WinControls.UI;
using Telerik.WinControls.Primitives;
using System.Linq;

namespace RadControlsWinFormsApp1
{
    public partial class RadForm1 : Telerik.WinControls.UI.RadForm
    {

        private GridViewRowInfo[] _selectedRows;
        private int _currentRow = 0;
        public RadForm1()
        {
            InitializeComponent();


            List<User> users = new List<User>();
            int k = 0;
            while (k <= 20)
            {
                users.Add(new User(k, "User " + k.ToString(), k));
                k++;
            }

            this.radGridView1.DataSource = users;

            this.radGridView1.KeyDown += new KeyEventHandler(radGridView1_KeyDown);

            this.radGridView1.ReadOnly = true;
            this.radGridView1.MultiSelect = true;
            this.radGridView1.Rows[0].IsCurrent = true;
            this.radGridView1.Rows[0].IsSelected = true;

            _selectedRows = new GridViewRowInfo[0];
            this.radGridView1.RowFormatting += new RowFormattingEventHandler(radGridView1_RowFormatting);
        }


        void radGridView1_RowFormatting(object sender, RowFormattingEventArgs e)
        {
            if (e.RowElement.IsSelected)
            {
                e.RowElement.NumberOfColors = 1;
                e.RowElement.BackColor = System.Drawing.Color.LightBlue;
                e.RowElement.DrawFill = true;
            }
            else
            {
                e.RowElement.ResetValue(LightVisualElement.NumberOfColorsProperty);
                e.RowElement.ResetValue(LightVisualElement.BackColorProperty);
                e.RowElement.ResetValue(LightVisualElement.DrawFillProperty);
            }
        }


        void radGridView1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Space)
            {
                if (this.radGridView1.SelectedRows.Count > 0)
                {
                    _selectedRows = new GridViewRowInfo[this.radGridView1.SelectedRows.Count];
                    _currentRow = this.radGridView1.CurrentRow.Index;
                    this.radGridView1.SelectedRows.CopyTo(_selectedRows, 0);

                    this.radGridView1.ClearSelection();
                    this.radGridView1.CurrentRow = null;

                }
                else
                {
                    this.radGridView1.CurrentRow = this.radGridView1.Rows[_currentRow];
                    foreach (GridViewRowInfo row in _selectedRows)
                    {
                        row.IsSelected = true;
                        row.InvalidateRow();

                    }

                }
            }

        }



    }


    public class User
    {
        public User(int id, string name, int jobId)
        {
            Id = id;
            Name = name;
            JobId = jobId;
        }

        public User()
        { }

        public int Id
        {
            get;
            set;
        }

        public string Name
        {
            get;
            set;
        }

        public int JobId
        {
            get;
            set;
        }

    }

    public class Job
    {
        public Job(int id, string name)
        {
            Id = id;
            Name = name;
        }

        public Job()
        { }

        public int Id
        {
            get;
            set;
        }

        public string Name
        {
            get;
            set;
        }
    }
}

Regards, 
Richard

[Roya]

Hello Richard
thank you Richard ,you reply my question very soon.
But i want to use Space to select rows,for example i want to select 10 rows then i press space on 10 rows one by one and all of  this 10 rows will be selected and the back color of them will be change.then i press space on some  of those 10 rows again so the status of them will be change to not selected and the back color of them will be change to default.

[Stefan]

Hello,

@Roya, the desired functionality will be a great addition to RadGridView , so I will add it in PITS for future implementation. I have updated your Telerik points for bringing this to our attention. Here is a link to the feature request: http://www.telerik.com/support/pits.aspx#/public/winforms/10983.

Attached, you can find the modified version of Richard's project, where the rows will be selected/deselected by pressing space. I am using the Tag property of the row to save its state. Additionally, all selected rows can be accessed at any time in the selectedRows List.

I hope this helps.

Regards,
Stefan
the Telerik team

[Roya]

Hello Stefan
Thank you very much, it was the answer.

[Stefan]

I am glad that I could help. Should you have any other questions, do not hesitate to open a new thread. 

All the best,
Stefan
the Telerik team