仿listBox写了一个Control控件为item的列表集合-阿里云开发者社区

仿listBox写了一个Control控件为item的列表集合，由于最近做个项目要用，微软提供的控件实现起来不行，但自己写了一个，效果如下：

代码

1using System;
2using System.Collections.Generic;
3using System.ComponentModel;
4using System.Data;
5using System.Drawing;
6using System.Text;
7using System.Text.RegularExpressions;
8using System.Windows.Forms;
9
namespace SQLAnalysis
{
public class MySelfControlList : Control
{
private System.Windows.Forms.ErrorProvider err;
public MySelfControlList()
{
InitializeComponent();
this.BackColor = Color.White;
itemList = new ListItemColloction();
if (isNeedVaidate)
{
err = new ErrorProvider();
}
}
[Browsable(false)]
public bool IsValidated
{
get
{
return List_Validating();
}
}
[DefaultValue(typeof(Color), "White")]
public override Color BackColor
{
get
{
return base.BackColor;
}
set
{
base.BackColor = value;
}
}
private ListItemColloction itemList;
/// <summary>
/// 不提供设计时绑定
/// </summary>
[Bindable(false), Browsable(false)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
public ListItemColloction Items
{
get
{
if (itemList == null)
itemList = new ListItemColloction();
return itemList;
}
set
{
itemList = value;
}
}
public int Count
{
get
{
return itemList.Count;
}
}
public void RemoveAll()
{
for( int i=this.itemList.Count -1;i>-1;i--)
{
Item item = itemList[i];
item.ItemControl.Parent = null;
itemList.Remove(item);
}
}
public int AddItem(Item item)
{
itemList.Add(item);
this.Refresh();
return itemList.IndexOf(item);
}
public void InsertItem(int index, Item item)
{
itemList.Insert(index, item);
this.Refresh();
}
public void RemoveItem(Item item)
{
item.ItemControl.Parent = null;
itemList.Remove(item);
this.Refresh();
}
public void RemoveItemAt(int index)
{
itemList[index].ItemControl.Parent = null;
itemList.RemoveAt(index);
this.Refresh();
}
private string emptyText;
public string EmptyText
{
get
{
return emptyText;
}
set
{
emptyText =value;
}
}
[Browsable(false)]
public override string Text
{
get
{
return base.Text;
}
set
{
base.Text = value;
}
}
public string ItemText(int index)
{
return itemList[index].ItemControl.Text;
}
private ToolTip toolTip1;
private int itemHeight = 25;
public int ItemHeight
{
get
{
return itemHeight;
}
set
{
itemHeight = value;
}
}
/// <summary>
/// 重写Paint方法
/// </summary>
/// <param name="e"></param>
protected override void OnPaint(PaintEventArgs e)
{
this.Height = this.itemHeight * (itemList.Count + 1);
base.OnPaint(e);
if (itemList.Count == 0)
{
e.Graphics.DrawString(this.emptyText, this.Font,Brushes.Black, e.ClipRectangle);
return;
}
//e.Graphics.DrawRectangle(new Pen(Brushes.Black),this.Left,this.Top,this.Width,this.Height);
for (int i = 0; i < itemList.Count; i++)
{
Point location = new Point(0, i * this.itemHeight);
Rectangle bound = new Rectangle(location, new Size(this.Size.Width, this.itemHeight));
OnDrawItem(new DrawItemEventArgsMySelf(bound, i, e.Graphics));
}
}
/// <summary>
/// 画每一项
/// </summary>
/// <param name="e"></param>
protected void OnDrawItem(DrawItemEventArgsMySelf e)
{
Graphics g = e.Graphics;
Pen pen = new Pen(Brushes.Wheat);
g.DrawRectangle(pen, e.Bound);
int index = e.Index;
if (index > -1 && index < itemList.Count)
{
Control ctr = itemList[index].ItemControl;
if (ctr.Parent == null)
{
ctr.Parent = this;
ctr.Height = e.Bound.Height;
if( ctr.Width >this.Width)
ctr.Width = this.Width - 5;
toolTip1.SetToolTip(ctr, itemList[index].ItemDescribe);
}
ctr.Location = e.Bound.Location;
}
}
public bool List_Validating()
{ bool isValidated = true;
foreach (Item item in itemList)
{
isValidated = isValidated && ListItemControls_Validating(item.ItemControl, new CancelEventArgs());
}
return isValidated;
}
public bool ListItemControls_Validating(object sender, CancelEventArgs e)
{
Control ctr = sender as Control;
Item item = itemList[ctr];
if (string.IsNullOrEmpty(item.Regex))
return true;
Regex regex = new Regex(item.Regex);
string text = ctr.Text.Trim();
if (!regex.IsMatch(text))
{
err.SetIconAlignment(ctr, ErrorIconAlignment.MiddleRight);
err.SetIconPadding(ctr, 3);
err.SetError(ctr, item.ErrorMessage);
return false;
}
err.Clear();
return true;
}
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.toolTip1 = new System.Windows.Forms.ToolTip(this.components);
this.SuspendLayout();
this.ResumeLayout(false);
}
private IContainer components;
}
public class ListItemColloction : List<Item>
{
public Item this[Control itemControl]
{
get
{
for (int i = 0; i < this.Count; i++)
{
if (this[i].ItemControl.Equals(itemControl))
return this[i];
}
return null;
}
set
{
for (int i = 0; i < this.Count; i++)
{
if (this[i].ItemControl.Equals(itemControl))
this[i] = value;
}
}
}
}
[Serializable]
public class Item
{
private Control itemControl = null;
private string itemDescible = string.Empty;
private string regex = string.Empty;
private string errorMessage = string.Empty;
public Item()
{
}
public Item(Control itemControl, string itemDescible,string regex,string errorMessage)
{
this.itemControl = itemControl;
this.itemDescible = itemDescible;
this.regex = regex;
this.errorMessage = errorMessage;
}
public Item(Control itemControl, string itemDescible)
{
this.itemControl = itemControl;
this.itemDescible = itemDescible;
}
public string Regex
{
get
{
return regex;
}
set
{
regex = value;
}
}
public Control ItemControl
{
get
{
return itemControl;
}
set
{
itemControl = value;
}
}
public string ItemDescribe
{
get
{
return itemDescible;
}
set
{
itemDescible = value;
}
}
public string ErrorMessage
{
get
{
return errorMessage;
}
set
{
errorMessage = value;
}
}
}
public class DrawItemEventArgsMySelf : EventArgs
{
private Rectangle bound = Rectangle.Empty;
private int index;
private Graphics graphics;
public Graphics Graphics
{
get
{
return this.graphics;
}
}
public DrawItemEventArgsMySelf(Rectangle bound, int index, Graphics g)
{
this.bound = bound;
this.index = index;
this.graphics = g;
}
public Rectangle Bound
{
get
{
return this.bound;
}
}
public int Index
{
get
{
return index;
}
}
}
}

本文转自破狼 51CTO博客，原文链接：http://blog.51cto.com/whitewolfblog/832646，如需转载请自行联系原作者

仿listBox写了一个Control控件为item的列表集合

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