c 设计带图标和自定义颜色的listbox（C designs ListBox with icons and custom colors）.docVIP

c#设计带图标和自定义颜色的listbox（C# designs ListBox with icons and custom colors） C# designs ListBox with icons and custom colors The C# design, with icons and custom colors, is the key word for ListBox, C#, ListBox, and color, In a peer-to-peer file transfer project, I need to display the real-time information of file transfer: transfer file list and the current file transfer, then I think of ListBox, but I used ListBox, I found it could not change the text color to control, so I want to expand out. ListBox control ------ListBoxEx. My goal is to add icons to space and to change the text color of the control at any time. The class is derived from the ListBox Public class ListBoxEx: ListBox {... } For ease of operation, I designed a special class ListBoxEx for each item of ListBoxExItem Public, class, ListBoxExItem {... } To keep my control in line with the standard manipulation of WinForms standard controls, I redesigned two collection classes: Public class ListBoxExItemCollection: IList, ICollection, IEnumerator {} / / this class compared to the standard ListBox ObjectCollection in this class as a Items attribute in ListBoxEx type Public, class, SelectedListBoxExItemCollection:: IList, ICollection, IEnumerator{} / / this class compared to the standard ListBox SelectedObjectCollection in this class as a SelectedItems attribute in ListBoxEx type See below the implementation of the two collection class: The implementation of ListBoxExItemCollection: in order to achieve the set (Items) operation can be reflected to the ListBoxEx control so that such is only for ListBox Items (type ObjectCollection) made a layer of packaging, is that all the Items property in the ListBox as long as the parameters of type object are converted to ListBoxExItem, for example: Public void Remove (ListBoxExItem item) { This._Items.Remove (item); //_Items is the ObjectCollection type } Public, void, Insert (int, index, ListBoxExItem, item) { This._Items.Insert (index, item); } Public int Add (ListBoxExIt