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04.28.2008 at 12:29PM PDT, ID: 23359913
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Listview loses focus after using up or down keys

I have the following code (given to me by an Expert) which works file, except the listview loses focus then I have to click to select a row in the listview.

How do I keep the focus in the Listview? (I have already tried listview.focus() which doesn't work).
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private void myListView1_KeyDown( object sender, KeyEventArgs e )
{
        int index;
 
        if ( myListView1.SelectedIndices.Count == 0 ) // if there is no items selected, do nothing; or whatever you want
                return;
 
        index = myListView1.SelectedIndices[ 0 ];
        if ( e.KeyCode == Keys.Up )
        {
                if ( index > 0 ) // you should check the index to reaching out of bounds
                        myListView1.Items[ index - 1 ].Selected = true;
        }
        else if ( e.KeyCode == Keys.Down )
                if ( index < myListView1.Items.Count - 1 )
                        myListView1.Items[ index + 1 ].Selected = true;
}
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Question Stats
Zone: Programming
Question Asked By: rmmarsh
Solution Provided By: Yurich
Participating Experts: 1
Solution Grade: A
Views: 4
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05.06.2008 at 07:58PM PDT, ID: 21512867

Rank: Guru

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05.07.2008 at 06:10AM PDT, ID: 21515972

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05.07.2008 at 12:21PM PDT, ID: 21519526

Rank: Guru

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07.15.2008 at 03:44AM PDT, ID: 22005571

Rank: Genius

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07.15.2008 at 04:00AM PDT, ID: 22005682

Rank: Guru

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05.06.2008 at 07:58PM PDT, ID: 21512867

Rank: Guru

Hello there,

Just a quick question beforehand. Why do you need to do anything extra for your key-up and down?? As far as I know, arrow up and down work just fine without ANYTHING extra for you to do on your ListView.

The only possible thing you need to set focus to your ListView initially, but you can set a tab order and just tab to it as well.

I'm attaching a bit of a code for a form with just a ListView and it works just fine for up and down keys.

Cheers,
Yurich
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namespace ListView_Focus
{
	partial class Form1
	{
		/// <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()
		{
			System.Windows.Forms.ListViewItem listViewItem1 = new System.Windows.Forms.ListViewItem( "One" );
			System.Windows.Forms.ListViewItem listViewItem2 = new System.Windows.Forms.ListViewItem( "Two" );
			System.Windows.Forms.ListViewItem listViewItem3 = new System.Windows.Forms.ListViewItem( "Three" );
			System.Windows.Forms.ListViewItem listViewItem4 = new System.Windows.Forms.ListViewItem( "Four" );
			System.Windows.Forms.ListViewItem listViewItem5 = new System.Windows.Forms.ListViewItem( "Five" );
			System.Windows.Forms.ListViewItem listViewItem6 = new System.Windows.Forms.ListViewItem( "Six" );
			this.listView1 = new System.Windows.Forms.ListView();
			this.SuspendLayout();
			// 
			// listView1
			// 
			this.listView1.Items.AddRange( new System.Windows.Forms.ListViewItem[] {
            listViewItem1,
            listViewItem2,
            listViewItem3,
            listViewItem4,
            listViewItem5,
            listViewItem6} );
			this.listView1.Location = new System.Drawing.Point( 12, 12 );
			this.listView1.Name = "listView1";
			this.listView1.Size = new System.Drawing.Size( 121, 97 );
			this.listView1.TabIndex = 0;
			this.listView1.UseCompatibleStateImageBehavior = false;
			// 
			// Form1
			// 
			this.AutoScaleDimensions = new System.Drawing.SizeF( 6F, 13F );
			this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
			this.ClientSize = new System.Drawing.Size( 292, 266 );
			this.Controls.Add( this.listView1 );
			this.Name = "Form1";
			this.Text = "Form1";
			this.ResumeLayout( false );
 
		}
 
		#endregion
 
		private System.Windows.Forms.ListView listView1;
	}
}
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05.07.2008 at 06:10AM PDT, ID: 21515972
The problem is that after I move to the new selection, I lose focus in the listview.
 
05.07.2008 at 12:21PM PDT, ID: 21519526

Rank: Guru

Yes, I understand that. But try NOT implementing your custom code for up and down keys and you'll see that you'll be able to move between the items of your ListView and you will NOT lose the focus. Just try it.

Cheers,
Mik
Accepted Solution
 
07.15.2008 at 03:44AM PDT, ID: 22005571

Rank: Genius

No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I will leave the following recommendation for this question in the Cleanup topic area:
   Delete - no points refunded

Any objections should be posted here in the next 4 days. After that time, the question will be closed.

TheLearnedOne
EE Cleanup Volunteer
 
07.15.2008 at 04:00AM PDT, ID: 22005682

Rank: Guru

I think my suggest would fix the problem.
 
 
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