Problem with Listview Backcolor Property

Question

Hello all I have use the Following code... if (flag == true) { ((ListView)cntrl).Enabled = false; ((ListView)cntrl).BackColor = Color.White; } else { ((ListView)cntrl).Enabled = true; } After enabling Listview to false the backcolor changes to Default Control. instaead of white which i set... what is happninh here.. does any perooprty is remaining to change???

youtubeline youtubeline · Answer

this is the nice post for listview

try abc · Answer

thanks for reply.. but what i want is all the functionality of listview disable property.. means we can not check item not even select when list view is disabled. i use following code in which i crate a one class which inharites the Listview class and overrides the OnenableChange and Mousedown events.. but it does not work properly.. can u help in this.. i found on net if u want ot prevent user form checking item then unregister Itemcheck event and again register (using AddEvent handler) when u want to allow.. i think if i use that in mousedown it is possible .. but i dont know how to add and remove handler for that item.. using System; using System.Collections.Generic; using System.Text; using System.Drawing; using System.Windows.Forms; namespace WindowsApplication1 { class MyListView:ListView { public MyListView() { } protected override void OnPaint(PaintEventArgs e) { SolidBrush drawBrush = new SolidBrush(BackColor); //Use the ForeColor property e.Graphics.DrawRectangle(new Pen(drawBrush) 0 0 Width Height); } protected override void OnEnabledChanged(EventArgs e) { //base.OnEnabledChanged(e); Refresh(); } protected override void OnItemCheck(ItemCheckEventArgs ice) { if (Enabled == true) { base.OnItemCheck(ice); } else { } } protected override void OnColumnClick(ColumnClickEventArgs e) { // base.OnColumnClick(e); Refresh(); } protected override void OnMouseDown(MouseEventArgs e) { if (Enabled == true) { base.OnMouseDown(e); } else { // this code is not working properly.. Instad of this i want to Remove and Add / // ItemEventHadler .. when enable true i want to add handler else remove ListViewItem item = GetItemAt(e.X e.Y); if (item == null) { return; } switch (item.StateImageIndex) { case 0: item.StateImageIndex = 0; break; case 1: item.StateImageIndex = 1; break; } } } } }

Scott Lysle · Answer

Well the problem is that whenever the control is disabled the system sets the backcolor to the control color and your attempt to reset the color is disregarded. If you want to disable the control and control the backcolor you need to go a different route. Using the following example you could use your flag to enable and disable the listview and change its backcolor property. In this example a button sets the boolean flag to true or false and then sets the backcolor according to the flag's state. The selected index changed event of the listview control is then set to clear the selected items collection if the flag is set to false; since whenever the user clicks the control to select an item the selected item collection is cleared and nothing is selected it is effectively disabled but I am still setting the backcolor of the control as I see fit. private void btnEnableDisableListView_Click( object sender EventArgs e) { bFlag = !bFlag; if (bFlag == true ) listView1.BackColor = Color .White; else listView1.BackColor = Color .Azure; } private void listView1_SelectedIndexChanged( object sender EventArgs e) { if (bFlag == false ) listView1.SelectedItems.Clear(); }