Csharp: A Custom CheckedListBox with Datasource, checkedlistbox

Csharp: A Custom CheckedListBox with Datasource, checkedlistbox

 /// <summary>    /// (eraghi)    /// Custom CheckedListBox with binding facilities (Value property)    /// from A Custom CheckedListBox with Datasource  http://www.codeproject.com/Articles/22960/A-Custom-CheckedListBox-with-Datasource-Implementa    /// </summary>    [ToolboxBitmap(typeof(CheckedListBox))]    public class DuCheckedListBox : CheckedListBox    {        /// <summary>        /// Default constructor        /// </summary>        public DuCheckedListBox()        {            this.CheckOnClick = true;        }        /// <summary>        ///    Gets or sets the property to display for this CustomControls.CheckedListBox.        ///        /// Returns:        ///     A System.String specifying the name of an object property that 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 DisplayMember        {            get            {                return base.DisplayMember;            }            set            {                base.DisplayMember = value;            }        }        /// <summary>        ///    Gets or sets the property to get the values for this CustomControls.CheckedListBox.        ///        /// Returns:        ///     A System.String specifying the name of an object property that 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 ValueMember        {            get            {                return base.ValueMember;            }            set            {                base.ValueMember = value;            }        }        /// <summary>        /// Gets or sets the data source for this CustomControls.CheckedListBox.        /// Returns:        ///    An object that 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 System.Collections.IList or System.ComponentModel.IListSource        ///    interfaces.        /// </summary>        [DefaultValue("")]        [AttributeProvider(typeof(IListSource))]        [RefreshProperties(RefreshProperties.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 values ID        /// </summary>        [Bindable(true), Browsable(true)]        public List<int> ValueList        {            get            {                ///Gets checked items id values in a list                List<int> retArray = 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> 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 juwen"); dt. rows. add (2, "Geovin Du"); dt. rows. add (3, "geovindu"); dt. rows. add (4, "graffiti kingdom"); dt. rows. add (5, "tu"); dt. rows. add (6, "Zhang"); dt. rows. add (7, "Guo"); dt. rows. add (8, "Jiang"); return dt ;}/// <summary> //// </summary> public CheckedlistboxForm () {Init IalizeComponent ();} /// <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. I Tems. count; I ++) {// For every other item in the list, set as checked. if (I % 2) = 0) {// But for each other item that is to be 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 button#click (object sender, EventArgs e) {IEnumerator myEnumerator; myEnumerator = duCheckedListBox1.CheckedIndices. getEnumerator (); int y; // select none for all. // while (myEnumerator. moveNext ()! = False) // {// y = (int) myEnumerator. current; // 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 (itemChecked )). 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 () + ". ");}}

Set selected items:

            //2.            List<int> list;            list = new List<int> { 1, 4 };            int value = 0;            //for (int i = 0; i < duCheckedListBox1.Items.Count; i++)            //{            //    DataRowView view = duCheckedListBox1.Items[i] as DataRowView;            //    value = (int)view["ID"];            //    if (list.Contains(value))            //        duCheckedListBox1.SetItemChecked(i, true);            //}            for (int i = 0; i < duCheckedListBox1.Items.Count; i++)            {                DataRowView view = duCheckedListBox1.Items[i] as DataRowView;                value = (int)view["ID"];                if (value == 5)                    duCheckedListBox1.SetItemChecked(i, true);            }