Csharp:a Custom CheckedListBox with Datasource

 <summary>//(Eraghi)//Custom CheckedListBox with binding facilities (Value property)///from A C Ustom CheckedListBox with Datasource http://www.codeproject.com/Articles/22960/ A-custom-checkedlistbox-with-datasource-implementa//</summary> [ToolboxBitmap (typeof (CheckedListBox))] P Ublic class Ducheckedlistbox:checkedlistbox {//<summary>//Default constructor//&L T;/summary> public Ducheckedlistbox () {this.        CheckOnClick = true;        }//<summary>//sets the property to display for this customcontrols.checkedlistbox.        Returns://A System.String specifying the name of an object property which is contained In the collection specified by the CustomControls.CheckedListBox.DataSource//property.        The default is an empty string ("").     </summary> [DefaultValue ("")]   [TypeConverter ("System.Windows.Forms.Design.DataMemberFieldConverter, System.Design, version=2.0.0.0, culture= Neutral, publickeytoken=3de65a4a-2b5f-4d9d-88de-bfb692b10f93 ")] [Editor (" System.Windows.Forms.Design.DataMemberFieldEditor, System.Design, version=2.0.0.0, Culture=neutral, PublicKeyToken =3de65a4a-2b5f-4d9d-88de-bfb692b10f93 ", typeof (UITypeEditor))] [browsable (true)] public new string Displayme mber {get {return base.            DisplayMember; } set {base.            DisplayMember = value; }}///<summary>//sets the property to get the values for this customcontrols.ch        Eckedlistbox.        Returns://A System.String specifying the name of an object property which is contained In the collection specified by the CustomControls.CheckedListBox.DataSource//property. The default is anEmpty string (""). </summary> [DefaultValue ("")] [TypeConverter ("System.Windows.Forms.Design.DataMemberFieldConverter , System.Design, version=2.0.0.0, Culture=neutral, publickeytoken=3de65a4a-2b5f-4d9d-88de-bfb692b10f93 ")] [Editor (" System.Windows.Forms.Design.DataMemberFieldEditor, System.Design, version=2.0.0.0, Culture=neutral, PublicKeyToken =3de65a4a-2b5f-4d9d-88de-bfb692b10f93 ", typeof (UITypeEditor))] [browsable (true)] public new string VALUEMEMB Er {get {return base.            ValueMember; } set {base.            ValueMember = value;        }}///<summary>//sets the data source for this customcontrols.checkedlistbox.         Returns://An object, implements the System.Collections.IList or System.ComponentModel.IListSource interfaces, such as a System.Data.DataSet or an System.Array. THe default//IS NULL. Exceptions://System.ArgumentException://The assigned value does not implement the Sy Stem.        Collections.ilist or System.ComponentModel.IListSource///interfaces. </summary> [DefaultValue ("")] [Attributeprovider (typeof (IListSource))] [Refreshproperties (R                Efreshproperties.all)] [browsable (true)] public new object DataSource {get { Return base.            DataSource; } set {base.            DataSource = value; }}///<summary>//Gets and sets an integer array of the values based on checked items value             s ID///</summary> [Bindable (True), browsable (true)] public list<int> ValueList { Get {///gets checked items ID values in a list list<int> Retar Ray= new List<int> ();                PropertyDescriptor prop = null; PropertyDescriptorCollection proplist = this.                Datamanager.getitemproperties (); Prop = Proplist.find (this.                ValueMember, false);                Object Checkeditem; if (prop! = null) {for (int i = 0; I < this. Items.Count; i++) {if (this. Getitemchecked (i)) {Checkeditem = this.                            Datamanager.list[i]; Retarray.add (Convert.ToInt32 (Prop. GetValue (Checkeditem).                        ToString ()));            }}} return retarray; } set {///sets checked items base on ID values in a list list<int& Gt                MyList = value;                PropertyDescriptor prop = null; PropertyDescriptorCollection proplist = this. DataManAger.                Getitemproperties (); Prop = Proplist.find (this.                ValueMember, false);                Object Checkeditem;                int Intvalitem;                int found; if (prop! = null) {for (int i = 0; I < this. Items.Count; i++) {Checkeditem = this.                        Datamanager.list[i]; Intvalitem = Convert.ToInt32 (Prop. GetValue (Checkeditem).                        ToString ()); Found = (from C in myList where c = = Intvalitem Select c).                        Count (); if (found = = 1) this.                        Setitemcheckstate (i, checkstate.checked); else this.                    Setitemcheckstate (i, checkstate.unchecked); }                }            }        }    }

Test:

        DataTable SetData () {datatable dt = new DataTable (); Dt.            Columns.Add ("ID", typeof (int)); Dt.            Columns.Add ("Name", typeof (String)); Dt.            Rows.Add (1, "Tu Ju Wen"); Dt.            Rows.Add (2, "Geovin Du"); Dt.            Rows.Add (3, "Geovindu"); Dt.            Rows.Add (4, "Graffiti Kingdom"); Dt.            Rows.Add (5, "Tu Shi"); Dt.            Rows.Add (6, "Zhang Shi"); Dt.            Rows.Add (7, "Kuok"); Dt.            Rows.Add (8, "Jiang Shi");        return DT;            }///<summary>////</summary> public checkedlistboxform () {        InitializeComponent ();        }//<summary>///</summary>//<param name= "Sender" ></param>        <param name= "E" ></param> private void Checkedlistboxform_load (object sender, EventArgs e)            {This.duCheckedListBox1.DataSource = SetData (); This.duCheckedListBox1.DisplayMember = "Name ";            This.duCheckedListBox1.ValueMember = "ID";            set bool Insidecheckeveryother = TRUE; for (int i = 0; i < DuCheckedListBox1.Items.Count; i++) {//For every other item in the list                 , set as checked.                      if ((i% 2) = = 0) {//But for each of the other item ' is ' to ' checked, set as being in an                     Indeterminate checked state.                    if ((i% 4) = = 0) ducheckedlistbox1.setitemcheckstate (i, checkstate.indeterminate);                else ducheckedlistbox1.setitemchecked (I, true);        }} Insidecheckeveryother = false;        }//<summary>///</summary>//<param name= "Sender" ></param>       <param name= "E" ></param> private void Button1_Click (object sender, EventArgs e) {IEnumerator myenumerator;            Myenumerator = DuCheckedListBox1.CheckedIndices.GetEnumerator ();            int y; Select for all//while (Myenumerator.movenext ()! = False)//{//y = (int) Myenumerator.curr            Ent            Ducheckedlistbox1.setitemchecked (Y, false); }//foreach (Object itemchecked in Ducheckedlistbox1.checkeditems)//{//MessageBox . Show ("Item with title: \" "+ itemchecked.tostring () +//" \ ", is checked. Checked State is: "+//Ducheckedlistbox1.getitemcheckstate (DuCheckedListBox1.Items.IndexOf (Itemche cked)).            ToString () + "."); } foreach (DataRowView itemchecked in Ducheckedlistbox1.checkeditems) {MessageBox. Show ("Item with title: \" "+ itemchecked[0]. ToString () + itemchecked[1]. ToString () + "\", is checked.          Checked State is: "+              Ducheckedlistbox1.getitemcheckstate (DuCheckedListBox1.Items.IndexOf (itemchecked)).            ToString () + "."); }        }

　　

Csharp:a Custom CheckedListBox with Datasource