csharp:A Custom CheckedListBox with Datasource
/// <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);
}
}
}
}
}
测试:
DataTable setData()
{
DataTable dt = new DataTable();
dt.Columns.Add("ID", typeof(int));
dt.Columns.Add("Name", typeof(string));
dt.Rows.Add(1, "涂聚文");
dt.Rows.Add(2, "Geovin Du");
dt.Rows.Add(3, "geovindu");
dt.Rows.Add(4, "涂鸦王国");
dt.Rows.Add(5, "涂氏");
dt.Rows.Add(6, "张氏");
dt.Rows.Add(7, "郭氏");
dt.Rows.Add(8, "江氏");
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";
//设定
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 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 button1_Click(object sender, EventArgs e)
{
IEnumerator myEnumerator;
myEnumerator = duCheckedListBox1.CheckedIndices.GetEnumerator();
int y;
//选择为全为无选
//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() + ".");
}
}
设置已选择项:
//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);
}