基本信息
源码名称:C# 下拉框实现多选功能(自定义控件)源码
源码大小:0.23M
文件格式:.rar
开发语言:C#
更新时间:2017-09-13
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源码介绍
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using PresentationControls;
namespace DemoApp
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private StatusList _StatusList;
private ListSelectionWrapper<Status> StatusSelections;
private void Form1_Load(object sender, EventArgs e)
{
PopulateManualCombo();
#region POPULATED USING A CUSTOM "IList" DATASOURCE
_StatusList = new StatusList();
_StatusList.Add(new Status(1, "New"));
_StatusList.Add(new Status(2, "Loaded"));
_StatusList.Add(new Status(3, "Inserted"));
Status UpdatedStatus = new Status(4, "Updated");
_StatusList.Add(UpdatedStatus);
_StatusList.Add(new Status(5, "Deleted"));
StatusSelections = new ListSelectionWrapper<Status>(_StatusList, "Name");
cmbIListDataSource.DataSource = StatusSelections;
cmbIListDataSource.DisplayMemberSingleItem = "Name";
cmbIListDataSource.DisplayMember = "NameConcatenated";
cmbIListDataSource.ValueMember = "Selected";
cmbIListDataSource.CheckBoxItems[3].DataBindings.DefaultDataSourceUpdateMode
= DataSourceUpdateMode.OnPropertyChanged;
cmbIListDataSource.DataBindings.DefaultDataSourceUpdateMode
= DataSourceUpdateMode.OnPropertyChanged;
StatusSelections.FindObjectWithItem(UpdatedStatus).Selected = true;
#endregion
#region POPULATED USING A DATATABLE
DataTable DT = new DataTable("TEST TABLE FOR DEMO PURPOSES");
DT.Columns.AddRange(
new DataColumn[]
{
new DataColumn("Id", typeof(int)),
new DataColumn("SomePropertyOrColumnName", typeof(string)),
new DataColumn("Description", typeof(string)),
});
DT.Rows.Add(1, "AAAA", "AAAAA");
DT.Rows.Add(2, "BBBB", "BBBBB");
DT.Rows.Add(3, "CCCC", "CCCCC");
DT.Rows.Add(3, "DDDD", "DDDDD");
cmbDataTableDataSource.DataSource =
new ListSelectionWrapper<DataRow>(
DT.Rows,
"SomePropertyOrColumnName" // "SomePropertyOrColumnName" will populate the Name on ObjectSelectionWrapper.
);
cmbDataTableDataSource.DisplayMemberSingleItem = "Name";
cmbDataTableDataSource.DisplayMember = "NameConcatenated";
cmbDataTableDataSource.ValueMember = "Selected";
#endregion
}
private void PopulateManualCombo()
{
cmbManual.Items.Add("Item 1");
cmbManual.Items.Add("Item 2");
cmbManual.Items.Add("Item 3");
cmbManual.Items.Add("Item 4");
cmbManual.Items.Add("Item 5");
cmbManual.Items.Add("Item 6");
cmbManual.Items.Add("Item 7");
cmbManual.Items.Add("Item 8");
cmbManual.CheckBoxItems[1].Checked = true;
}
private void btnCheckItem1_Click(object sender, EventArgs e)
{
cmbManual.CheckBoxItems["Item 1"].Checked = !cmbManual.CheckBoxItems["Item 1"].Checked;
}
private void btnCheckItem5_Click(object sender, EventArgs e)
{
checkBoxComboBox1.CheckBoxItems["Item 5"].Checked = !checkBoxComboBox1.CheckBoxItems["Item 5"].Checked;
}
private void btnCheckDDDD_Click(object sender, EventArgs e)
{
cmbDataTableDataSource.CheckBoxItems["DDDD"].Checked = !cmbDataTableDataSource.CheckBoxItems["DDDD"].Checked;
}
private void btnCheckInserted_Click(object sender, EventArgs e)
{
cmbIListDataSource.CheckBoxItems["Inserted"].Checked = !cmbIListDataSource.CheckBoxItems["Inserted"].Checked;
}
private void btnClear_Click(object sender, EventArgs e)
{
cmbManual.Clear();
PopulateManualCombo();
}
}
}