我们在开发的过程中经常要用到comboBox控件，而且通常要绑定数据。用.net自带的控件绑定起来有点麻烦。而且操作起来不方便。所以重写了一下。希望对大家有点用。献丑了!
以前我们绑定comboBox数据：
private void LoadTaster()
{
try
{ Cursor.Current = ApplicationLog.AppCursor; cboTaster.Items.Clear(); cboTaster.Items.Add("<无>"); DataSet userDS = SystemManageBF.GetTaster(); DataView dvTree = new DataView(userDS.Tables[0]); foreach (DataRowView Row in dvTree) { cboTaster.Items.Add(Row["NAME"].ToString());
} if (cboTaster.Items.Count > 0) cboTaster.SelectedIndex = 0; Cursor.Current = Cursors.Default; } catch (Exception ex) { Cursor.Current = Cursors.Default; MessageBox.Show(ex.Message, "加载审批人员错误", MessageBoxButtons.OK, MessageBoxIcon.Error); Close(); }
}重写后的comboBox代码：
Code/**//**************************************************************** Author:Huzy* CopyRight:Huzy Studio* WebSite:WWW.DTVCMS.COM* ControlName:HuzyComboBox* Date:2008-06-17 13:00:02****************************************************************/using System;using System.Collections.Generic;using System.Text;using System.Windows.Forms;using System.Data;using System.ComponentModel;using System.Collections;using System.Reflection;namespace Huzy.Controls{ /**//// <summary> /// 专门用于填充ComboBox信息方法--Coding By Huzy /// </summary> public class HuzyComboBox : ComboBox { private DataSet _dataSet = null; /**//// <summary> /// 设置数据源 /// </summary> public DataSet DataSet { set { _dataSet = value; } } private string _keyName; /**//// <summary> /// 设置加载数据第一列名称,默认为第一列索引 /// </summary> public string KeyName { set { _keyName = value; } get { return _keyName; } } private string _keyValue; /**//// <summary> /// 设置加载数据第二列名称,默认为第二列索引 /// </summary> public string KeyValue { set { _keyValue = value;} get { return _keyValue; } } /**//// <summary> /// 获取或设置 HuzyComboBox 中当前选定的项 /// </summary> public ComboBoxItem SelectedComboBoxItem { get { int num1 = this.SelectedIndex; if (num1 != -1) { return this.ItemsCollection[num1]; } return null; } } private ItemsCollection _itemsCollection; /**//// <summary> /// 取得项目集合 /// </summary> //[Browsable(false)] public ItemsCollection ItemsCollection { get { if (_itemsCollection == null) _itemsCollection = new ItemsCollection(this); return _itemsCollection; } } /**//// <summary> /// 执行加载ComboBox信息方法 /// </summary> public void DataBindings() { Binding(); } /**//// <summary> /// 执行加载ComboBox信息方法 /// </summary> /// <param name="dataSet">设置数据源</param> public void DataBindings(DataSet dataSet) { this._dataSet = dataSet; Binding(); } /**//// <summary> /// 执行加载ComboBox信息方法 /// </summary> /// <param name="dataSet">数据集</param> /// <param name="columnNameOne">键名称</param> /// <param name="columnNameTwo">键值</param> public void DataBindings(DataSet dataSet, string keyName, string keyValue) { this._dataSet = dataSet; this._keyName = keyName; this._keyValue = keyValue; Binding(); } /**//// <summary> /// 绑定数据项 /// </summary> private void Binding() { if (_dataSet == null) return; if (_dataSet.Tables[0].Rows.Count > 0) { foreach (DataRow row in _dataSet.Tables[0].Rows) { object row1 = null; object row2 = null; if (string.IsNullOrEmpty(_keyName)) row1 = row[0]; else row1 = row[_keyName]; if (string.IsNullOrEmpty(_keyValue)) row2 = row[1]; else row2 = row[_keyValue]; ItemsCollection.Add(row1, row2); } } } } /**//// <summary> /// 代表 ItemsCollection 中项的集合 /// </summary> public class ItemsCollection : List<ComboBoxItem> { private ComboBox owner; /**//// <summary> /// 初始化ItemsCollection的新实例 /// </summary> /// <param name="owner">拥有该对象集合的 System.Windows.Forms.ComboBox</param> public ItemsCollection(ComboBox owner) { this.owner = owner; } public ItemsCollection() { } /**//// <summary> /// 向任务集中增加一个ComboBoxItem对象 /// </summary> /// <param name="ComboBoxItem">ComboBoxItem对象</param> public new void Add(ComboBoxItem _comboBoxItem) { this.owner.Items.Add(_comboBoxItem.Item); base.Add(_comboBoxItem); } /**//// <summary> /// 向任务集中增加一个HuzyComboBox对象 /// </summary> /// <param name="key">键</param> /// <param name="item">值</param> public void Add(object key, object item) { ComboBoxItem comboBoxItem = new ComboBoxItem(key, item); this.owner.Items.Add(item); base.Add(comboBoxItem); } /**//// <summary> /// 向任务集中增加一个ComboBoxItem对象数组 /// </summary> /// <param name="ComboBoxItem">ComboBoxItem对象数组</param> public void AddRange(ComboBoxItem[] _comboBoxItem) { if (_comboBoxItem == null) return; if (_comboBoxItem.Length <= 0) return; for (int i = 0; i < _comboBoxItem.Length; i++) { this.owner.Items.Add(_comboBoxItem[i].Item); base.Add(_comboBoxItem[i]); } } /**//// <summary> /// 向任务集中增加一个ComboBoxItem对象数组 /// </summary> /// <param name="key">键数组</param> /// <param name="item">值数组</param> public void AddRange(object[] _key, object[] item) { if (_key == null || item==null) return; if (_key.Length <= 0 || item.Length <= 0) return; if (_key.Length!=item.Length) return; for (int i = 0; i < _key.Length; i++) { this.owner.Items.Add(item[i]); base.Add(( new ComboBoxItem(_key[i],item[i]))); } } /**//// <summary> /// 从 HuzyComboBox 中移除所有项 /// </summary> public new void Clear() { this.owner.Items.Clear(); base.Clear(); } /**//// <summary> /// 检索指定的项在集合中的索引 /// </summary> /// <param name="value">一个对象，它表示要在集合中查找的项</param> /// <returns>项在集合内从零开始的索引；否则为 -1</returns> public new int IndexOf(ComboBoxItem value) { if (value == null) return -1; return base.IndexOf(value); } /**//// <summary> /// 移除 HuzyComboBox 中指定索引处的项 /// </summary> /// <param name="value">要移除的项的索引</param> public new void RemoveAt(int index) { if (this.owner == null) return; if (this.owner.Items.Count <= 0) return; if ((index < 0) || (index >= this.Count)) return; this.owner.Items.RemoveAt(index); base.RemoveAt(index); } /**//// <summary> /// 从 ItemsCollection 中移除指定的项 /// </summary> /// <param name="index">要从列表移除的 ComboBoxItem</param> public new void Remove(ComboBoxItem value) { int index = this.IndexOf(value); if (index != -1) { base.RemoveAt(index); } } public new ComboBoxItem this[int index] { set { base[index] = value; } get { return base[index]; } } } /**//// <summary> /// ComboBoxItem属性 /// </summary> [Serializable()] public class ComboBoxItem { private object _key; /**//// <summary> /// 键 /// </summary> public object Key { set { _key = value; } get { return _key; } } private object _item; /**//// <summary> /// 值 /// </summary> public object Item { set { _item = value; } get { return _item; } } /**//// <summary> /// ComboBoxItem属性构造函数 /// </summary> /// <param name="key">键</param> /// <param name="item">值</param> public ComboBoxItem(object key, object item) { this._key = key; this._item = item; } public ComboBoxItem() { } }}重写后对数据绑定：
Code cboPayUser.DataBindings(SystemManageBF.GetChildAreaAllPayUserByAreaID(ApplicationLog.AccessAreaID),"User_ID","User_Name"); if (cboPayUser.ItemsCollection.Count > 0) cboPayUser.SelectedIndex = 0; cboPolicy.DataSet = SaleManageBF.GetValidPolicy(ApplicationLog.QuerySelectedCustom.CUSTOM_CLASS, ApplicationLog.QuerySelectedCustom.GROUP_ID, ApplicationLog.QuerySelectedCustom.CUSTOM_ATTR == "0" ? "" : ApplicationLog.QuerySelectedCustom.CUSTOM_ATTR, ApplicationLog.GetLoginUser().USER_ID); cboPolicy.KeyName = "策略编号"; cboPolicy.KeyValue = "策略名称"; cboPolicy.DataBindings(); if (cboPolicy.ItemsCollection.Count > 0) cboPolicy.SelectedIndex = 0; cboPayType.ItemsCollection.Add("X", "现金"); cboPayType.ItemsCollection.Add("D", "银行代收费"); cboPayType.ItemsCollection.Add("S", "银行刷卡"); if (cboPayType.ItemsCollection.Count > 0) cboPayType.SelectedIndex =1;MessageBox.Show(string.Format("键：{0}\r\n值：{1}",cboPayUser.SelectedComboBoxItem.Key.ToString(),cboPayUser.SelectedComboBoxItem.Item.ToString()));
源代码:下载
希望大家能点给意见！！
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