WinForm Customizing the listbox display style

WinForm Custom ListBox display style, multi-column different color display, effects such as:

First, drag a ListBox control to the WinForm window, named Lstconsole, and set DrawMode to: OwnerDrawFixed, it's important to note that otherwise our next job won't work.

Then we come from the definition ListBoxItem, the code is as follows:

    public class Coloredlistboxitem {//<summary>//Creates a new Coloredlistboxitem// </summary>//<param name= "prefix" >the prefix which would be used</param>//<param N Ame= "text" >the real message</param>//<param name= "color" >the color of both</param> p            Ublic Coloredlistboxitem (DateTime time, string prefix, string text, color color) {time = time;            Text = text;            Prefix = Prefix;        TextColor = color; }//<summary>//The real message///</summary> public DateTime time {get; SE T }//<summary>//The prefix of the text////</summary> public string Prefix {g Et Set  }///<summary>//The real message////</summary> public string Text {get; set; }///<summary>//The color of The message///</summary> public Color textcolor {get; set;} } public enum LogType {//<summary>//OpenVPN changed the internal STATE.L//</s        Ummary> Created,///<summary>//The management interface wants to say something. </summary> Changed,///<summary>/A "normal" message is logged by OpenVPN via Mans        Agement Interface. </summary> Deleted,///<summary>/A Debug message is sent.        This is the primary for internal usage. </summary> Renamed}

Next, switch to the event and add the DrawItem event to Lstconsole: Lstconsole_drawitem, the code is as follows:

private void Lstconsole_drawitem (object sender, DrawItemEventArgs e) {//Just in case the list is empty            ... if (E.index = =-1) return;            Prefixes is drawed bold font prefixfont = new Font (E.font, fontstyle.bold); Coloredlistboxitem li = (coloredlistboxitem) ((ListBox) sender).            Items[e.index]; Brush br = new SolidBrush (li.            TextColor); Calculate the width of the longest time int timewidth = (int) e.graphics.measurestring ("" + New DateTime (222 2, A, 222, CultureInfo.CurrentCulture.Calendar, datetimekind.local). ToString (), Prefixfont, E.bounds.width, Stringformat.genericdefault).            Width; Calculate the width of the longest prefix int prefixwidth = (int) e.graphics.measurestring ("[Management]", p Refixfont, E.bounds.width, Stringformat.genericdefault).            Width;            Prepare the prefix string prefix = ""; Switch (li. PrEfix) {case "Created": prefix = "[Create file]";                Break                    Case "Changed": prefix = "[modify file]";                Break                    Case "Deleted": prefix = "[delete file]";                Break                    Case "Renamed": prefix = "[rename file]";                Break            Default:break;            } e.drawbackground ();            Rectangle newbounds = new Rectangle (e.bounds.location, e.bounds.size); Draw the time e.graphics.drawstring (li.            Time.tostring (), Prefixfont, BR, Newbounds, Stringformat.genericdefault);            Calculate the new rectangle newbounds.x + = Timewidth;            Newbounds.width-= Timewidth;            Draw the prefix e.graphics.drawstring (prefix, Prefixfont, BR, Newbounds, Stringformat.genericdefault); Calculate the new RECtangle newbounds.x + = Prefixwidth;            Newbounds.width-= Prefixwidth; Draw the text e.graphics.drawstring (li.            Text, E.font, BR, Newbounds.x, Newbounds.y, Stringformat.genericdefault);        Draw the focus e.drawfocusrectangle (); }

In the final step, add the data that the item displays to the listbox:

        public void Addlog (LogType prefix, string text) {if (lstconsole.invokerequired) { try {//lstconsole.begininvoke (new Utilshelper.action<logtype, String&gt                ;(addlog), prefix, text);            } catch (ObjectDisposedException) {} return;            } Color Rowcolor;                    Switch (prefix) {case LogType.Created:rowColor = Color.green;                Break                    Case LogType.Changed:rowColor = Color.darkblue;                Break                    Case LogType.Deleted:rowColor = Color.brown;                Break                    Default://e.g. state Rowcolor = Color.Black;            Break            } lstconsole.beginupdate ();     if (LstConsole.Items.Count = = 2048)           LstConsole.Items.RemoveAt (0); LSTCONSOLE.ITEMS.ADD (New Coloredlistboxitem (DateTime.Now, prefix.            ToString (), text, Rowcolor));            int h = lstconsole.clientsize.height-lstconsole.margin.vertical;            int i = lstconsole.items.count-1;                while (H >= 0 && i > 0) {int nh = lstconsole.getitemheight (i);                if (nh > H) break;                    else {h-= NH;                i--;            }} lstconsole.topindex = i;        Lstconsole.endupdate (); }

Show effect software: Download windows file Monitor

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WinForm Customizing the listbox display style